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1.
J Endocrinol Invest ; 32(3): 228-33, 2009 Mar.
Article in English | MEDLINE | ID: mdl-19542739

ABSTRACT

BACKGROUND: Retinoic acid (RA) treatment has been used for redifferentiation of metastatic thyroid neoplasia that have lost radioiodine (131I) uptake with heterogeneous results. AIM: Retrospective analysis of the recovery rate of 131I uptake after RA treatment in patients from 11 Spanish hospitals. METHODS: Twenty-seven patients (14 men, 13 women) with papillary [21], follicular [4], and oncocytic [2] thyroid cancer initially treated with total thyroidectomy plus 131I, and with 131I negative metastatic disease, were given 13-cis RA (0.66-1.5 mg/kg for 5-12 weeks) followed by a therapeutic 131I dose (3700-7400 MBq); 3 months later thyroglobulin levels and computed tomography imaging were performed. RESULTS: In 9 out 27 cases (33%) (8 papillary, 1 follicular) optimal positive 131I scan was observed after RA treatment; in the remaining 18, 10 had a suboptimal uptake (7 papillary, 2 follicular, 1 oncocytic) and in the rest there was no 131I uptake recovery (6 papillary, 1 follicular, 1 oncocytic). In 17 positive responses to RA (either optimal or suboptimal) in which image follow-up was available, decrease or stabilization of metastatic growth was observed in 7, while tumor mass increased at short term in the remaining 10. No major side effects were detected. CONCLUSION: Quite a high rate of 131I uptake recovery after RA treatment may be obtained in advanced differentiated thyroid cancer, but the potential modification of the natural course of the disease is uncertain. A better biological characterization of these tumors allowing the identification of potential responders to RA may improve the outcome of RA coadjuvant therapy.


Subject(s)
Carcinoma, Papillary, Follicular/diagnostic imaging , Carcinoma, Papillary, Follicular/drug therapy , Cell Differentiation/drug effects , Iodine Radioisotopes/therapeutic use , Isotretinoin/therapeutic use , Thyroid Neoplasms/diagnostic imaging , Thyroid Neoplasms/drug therapy , Adult , Aged , Aged, 80 and over , Algorithms , Carcinoma, Papillary, Follicular/rehabilitation , Combined Modality Therapy , Female , Humans , Male , Middle Aged , Radionuclide Imaging , Recovery of Function/drug effects , Recovery of Function/radiation effects , Retrospective Studies , Thyroid Neoplasms/rehabilitation , Treatment Outcome
2.
Eur Neurol ; 62(1): 49-55, 2009.
Article in English | MEDLINE | ID: mdl-19407455

ABSTRACT

Little is known about the mechanisms and relevance of cognitive dysfunction in systemic lupus erythematosus (SLE) patients who never displayed major neuropsychiatric manifestations (nSLE). Thirty-one nSLE female patients and 31 cognitively healthy control women were recruited. Sociodemographic, clinical, neuropsychological and SLE-related markers were collected including cerebral perfusion by single-photon emission computed tomography. Prevalences of cognitive complaints were 22.6% in nSLE versus 6.5% in the control group (p = 0.147); respective prevalences of cognitive dysfunction were 32.3 versus 6.5% (p = 0.01). Within the nSLE group, all cognitive domains appeared similarly affected, and correlations were found between cognitive dysfunction and less skilled occupation (r = -0.41, p = 0.02) and between cognitive complaints and depressive symptoms (r = 0.35, p = 0.05). Cognitive dysfunction is rather frequent in nSLE and seems to negatively impinge on social functioning.


Subject(s)
Cognition Disorders/epidemiology , Lupus Erythematosus, Systemic/epidemiology , Lupus Erythematosus, Systemic/psychology , Adult , Brain/diagnostic imaging , Cognition Disorders/diagnostic imaging , Cognition Disorders/etiology , Depression/epidemiology , Female , Humans , Lupus Erythematosus, Systemic/diagnostic imaging , Middle Aged , Neuropsychological Tests , Occupations , Prevalence , Radiography , Regression Analysis , Socioeconomic Factors , Tomography, Emission-Computed, Single-Photon , Young Adult
3.
Rev Esp Med Nucl ; 26(1): 19-29, 2007.
Article in Spanish | MEDLINE | ID: mdl-17286945

ABSTRACT

AIM: Renal cell carcinoma is the most frequent solid kidney tumor. At present, PET is not the imaging test of choice, the helical CT being the best method to assess these patients. The aim of the study was to perform a meta-analysis of the literature to evaluate the performance and accuracy of 18F-FDG PET in the detection of primary disease, recurrence and metastasis of renal cell carcinoma. MATERIALS AND METHODS: A systematic search was done of the available literature in primary and secondary databases published until October 2004 indexed in MEDLINE and CANCERLIT. Exclusion/inclusion criteria were applied. Their quality was evaluated using the Flynn criteria and joint estimators of sensitivity (S), specificity (Sp), likelihood ratios (LR), diagnostic odds ratio (DOR) and summary ROC (SROC) curve were obtained. The presence of the threshold effect was evaluated and the summary ROC (SROC) curve was calculated. RESULTS: Seven out of 46 studies fulfilled the inclusion criteria and were analyzed. Three studies evaluated the use of 18F-FDG PET in the differential diagnosis of renal masses. Two studies analyzed restaging and two analyzed the role of 18F-FDG PET in the detection of metastatic disease. All the selected studies were classified according to Flynn's criteria. We found the highest S in restaging with S 0.87 (95 % CI, 0.75-0.95) and in metastases detection with S 0.72 (95 % CI, 0.56-0.85) as well as the high Sp in differential diagnosis of renal masses. CONCLUSIONS: The results of this meta-analysis suggest that 18F-FDG PET can be useful in restaging and detection of metastatic disease, based on its acceptable S and Sp. However, the performance of 18F-FDG PET in the detection of primary disease is limited, but this may improve with the new PET/CT systems.


Subject(s)
Carcinoma, Renal Cell/diagnostic imaging , Fluorodeoxyglucose F18 , Kidney Neoplasms/diagnostic imaging , Positron-Emission Tomography , Radiopharmaceuticals , Humans , Reproducibility of Results
4.
Rev. esp. med. nucl. (Ed. impr.) ; 26(1): 19-29, ene. 2007. ilus, tab
Article in Es | IBECS | ID: ibc-053692

ABSTRACT

Objetivos. El adenocarcinoma de células renales es el tumor sólido renal más frecuente. La tomografía por emisión de positrones (PET) no constituye en el momento actual la prueba de imagen de elección, siendo la tomografía axial computarizada (TAC) el método más adecuado para la valoración de estos pacientes. El objetivo de este estudio es realizar una revisión sistemática, con la que resumir toda la evidencia existente hasta el momento sobre la eficacia y rendimiento diagnóstico de la PET con 18F-fluoro-deoxi-glucosa (FDG) en el diagnóstico de enfermedad primaria, recurrencia y metástasis del adenocarcinoma de células renales. Material y métodos. Para ello se realizó una búsqueda sistemática de la literatura disponible en bases de datos primarias y secundarias (MEDLINE y CANCERLIT), hasta octubre de 2004. Se aplicaron criterios de inclusión y exclusión. Se evaluó su calidad según criterios de Flynn y se obtuvieron los estimadores conjuntos de sensibilidad (S), especificidad (E), cocientes de probabilidad (CP), y odds ratio diagnóstica (ORD) con sus intervalos de confianza del 95 %. Se evaluó la presencia de efecto umbral y se calculó la curva ROC resumen (SROC). Resultados. De los 46 estudios encontrados se seleccionaron 7 según criterios de inclusión/exclusión. De ellos, tres hacían referencia a la PET en el diagnóstico de lesiones primarias, dos a la reestadificación y otros dos a la detección de metástasis. Los 7 estudios cumplían criterios de calidad de Flynn. El valor más alto de S lo encontramos en la reestadificación con S = 0,87 (IC 95 %, 0,75-0,95) y en la detección de metástasis con S = 0,72 (IC 95 %, 0,56-0,85), siendo la E más alta en el diagnóstico inicial E = 0,93 (IC 95 %, 0,86-0,97). Conclusiones. Los resultados de este meta-análisis sugieren que la PET-FDG es capaz de reestadificar y detectar lesiones metastásicas con una S y E aceptables, presentando limitaciones en el diagnóstico de tumores renales primarios. Este rendimiento diagnóstico quizá sea mejorable con la introducción de los nuevos equipos híbridos PET-TAC


Aim. Renal cell carcinoma is the most frequent solid kidney tumor. At present, PET is not the imaging test of choice, the helical CT being the best method to assess these patients. The aim of the study was to perform a meta-analysis of the literature to evaluate the performance and accuracy of 18F-FDG PET in the detection of primary disease, recurrence and metastasis of renal cell carcinoma. Materials and methods. A systematic search was done of the available literature in primary and secondary databases published until October 2004 indexed in MEDLINE and CANCERLIT. Exclusion/inclusion criteria were applied. Their quality was evaluated using the Flynn criteria and joint estimators of sensitivity (S), specificity (Sp), likelihood ratios (LR), diagnostic odds ratio (DOR) and summary ROC (SROC) curve were obtained. The presence of the threshold effect was evaluated and the summary ROC (SROC) curve was calculated. Results. Seven out of 46 studies fulfilled the inclusion criteria and were analyzed. Three studies evaluated the use of 18F-FDG PET in the differential diagnosis of renal masses. Two studies analyzed restaging and two analyzed the role of 18F-FDG PET in the detection of metastatic disease. All the selected studies were classified according to Flynn's criteria. We found the highest S in restaging with S 0.87 (95 % CI, 0.75-0.95) and in metastases detection with S 0.72 (95 % CI, 0.56-0.85) as well as the high Sp in differential diagnosis of renal masses. Conclusions. The results of this meta-analysis suggest that 18F-FDG PET can be useful in restaging and detection of metastatic disease, based on its acceptable S and Sp. However, the performance of 18F-FDG PET in the detection of primary disease is limited, but this may improve with the new PET/CT systems


Subject(s)
Humans , Tomography, Emission-Computed/methods , Carcinoma, Renal Cell , Kidney Neoplasms , Carcinoma, Renal Cell/diagnosis , Sensitivity and Specificity , Odds Ratio , Confidence Intervals , Kidney Neoplasms/diagnosis
6.
Cir. Esp. (Ed. impr.) ; 71(5): 224-227, mayo 2002. ilus
Article in Es | IBECS | ID: ibc-11390

ABSTRACT

Introducción. La biopsia del ganglio centinela permite realizar la indicación de linfadenectomías en estadios iniciales de tumores como el melanoma maligno cutáneo (MM). La necesidad de un adecuado conocimiento del drenaje linfático de la lesión, obtenido mediante linfogammagrafía preoperatoria, ha llevado a un cambio en el conocimiento de las vías de drenaje del organismo. Pacientes y método. Durante 3 años se ha llevado a cabo biopsia del ganglio centinela a 77 pacientes que presentaron 78 melanomas en estadios I y II, la mayoría de ellos incluidos en estadios de Breslow intermedios. A todos los pacientes se les inyectó el nanocoloide de tecnecio perilesional para, a continuación, llevar a cabo el estudio dinámico y, con posterioridad, imágenes tardías por medio de la linfogammagrafía. La identificación intraoperatoria se realizó por medio de una sonda detectora de rayos gamma (Navigator).Resultados. Se identifican 90 regiones linfáticas, en las que se localizan 87 ganglios centinelas (96,6 por ciento). Se aprecia una gran variabilidad en las vías de drenaje de las lesiones cutáneas, en especial en la cabeza, el cuello y el tronco. En este último, más concretamente inferior a la región umbilical, la posibilidad de drenar tanto en la axila como en la ingle se hace patente incluso de forma contralateral. Un total de 12 melanomas presentaron drenaje múltiple, siendo uno de ellos triple. En la región del tronco anteroinferior se localizó un mayor número de melanomas malignos con drenaje múltiple. Conclusiones. El conocimiento de la posibilidad de utilizar patrones de drenaje linfático poco habituales a la hora de llevar a cabo la biopsia del ganglio centinela permitirá una mayor efectividad en esta técnica. De la misma forma, se destaca la importancia del uso de la linfogammagrafía preoperatoria para la identificación adecuada del ganglio centinela (AU)


Subject(s)
Adult , Female , Male , Middle Aged , Humans , Lymph Node Excision/instrumentation , Lymph Node Excision/methods , Lymph Node Excision , Lymphography/methods , Lymphography , Drainage/methods , Drainage/trends , Drainage , Lymphatic System/pathology , Lymphatic System , Melanoma/complications , Melanoma/diagnosis , Melanoma/epidemiology , Melanoma/etiology , Melanoma/surgery , Melanoma/secondary , Biopsy/methods , Sentinel Lymph Node Biopsy , Skin Neoplasms/diagnosis , Skin Neoplasms/surgery , Skin Neoplasms/etiology , Skin Neoplasms/epidemiology , Lymph Node Excision/methods , Lymph Node Excision/trends , Lymph Node Excision
8.
Rev Esp Med Nucl ; 20(2): 90-5, 2001 Apr.
Article in Spanish | MEDLINE | ID: mdl-11333817

ABSTRACT

BACKGROUND AND OBJECTIVE: Patients with permanent ventricular pacemakers (PP) are a difficult subgroup to assess in the study of coronary artery disease. The objective of this study was to evaluate the diagnostic value of the myocardial perfusion scintigraphy with 99mTC-Tetrofosmin (Tc-Tf) and stimulus with dipyridamole in patients with PP and suspected coronary artery disease. PATIENTS AND METHODS: Fourteen patients with suspected coronary artery disease and without structural cardiopathy, who underwent Tc-Tf and cardiac catheterization, were studied retrospectively. Sensitivity, specificity, predictive values and Kappa index were calculated for the diagnosis of coronary artery disease, multivessel disease, and for each one of the coronary arteries (left anterior descending, right coronary, and circumflex). In addition, the correlation between the number of territories with perfusion defects and the number of diseased vessels was studied. RESULTS: In regards to the diagnosis of coronary artery disease, sensitivity, specificity, positive predictive value, negative predictive value and the Kappa index were 100%, 50%, 83%, 100% and 0.55, respectively. For multi-vessel disease, these values were 83%, 64%, 64%, 83% and 0.43 respectively. The correlation coefficient between the number of territories with perfusion defects and the number of diseased vessels was 0.61 (p = 0.02). In the diagnosis of anterior descending disease, sensitivity and specificity were 83% and 88% respectively. For the right coronary artery, these values were 100% and 44% and for the circumflex artery 38% and 83%, respectively. CONCLUSION: In patients with PP and suspected coronary artery disease, myocardial perfusion scintigraphy with Tc-Tf and stimulus with dipyridamole is of great value in the diagnosis of coronary artery disease and in the assessment of its extension.


Subject(s)
Angina Pectoris/diagnostic imaging , Arrhythmias, Cardiac/therapy , Dipyridamole , Organophosphorus Compounds , Organotechnetium Compounds , Pacemaker, Artificial , Radiopharmaceuticals , Tomography, Emission-Computed, Single-Photon , Vasodilator Agents , Aged , Aged, 80 and over , Angina Pectoris/epidemiology , Cardiac Catheterization , Comorbidity , Coronary Angiography , Coronary Circulation/drug effects , Dipyridamole/pharmacology , Female , Humans , Male , Myocardial Infarction/diagnostic imaging , Predictive Value of Tests , Risk Factors , Sensitivity and Specificity , Vasodilator Agents/pharmacology
9.
Rev. esp. med. nucl. (Ed. impr.) ; 20(2): 90-95, abr. 2001.
Article in Es | IBECS | ID: ibc-795

ABSTRACT

Introducción y objetivo: En el estudio de la cardiopatía isquémica, los pacientes portadores de marcapasos ventricular permanente (MVP), constituyen un subgrupo de muy difícil valoración. El objetivo fue evaluar el valor de la gammagrafía de perfusión miocárdica con 99mTc-Tetrofosmina (Tc-Tf) y estímulo con dipiridamol en el diagnóstico de enfermedad coronaria en pacientes portadores de MVP. Pacientes y métodos: Se estudiaron retrospectivamente 14 pacientes con sospecha de enfermedad coronaria, y sin cariopatía estructura, a los que se realizó Tc-Tf y coronariografía. Se calcularon la sensibilidad, especificidad, valores predictivos e índice de concordancia Kappa para la existencia de enfermedad coronaria, para la enfermedad multivaso y para cada una de las arterias coronarias (descendente anterior, coronaria derecha, circunfleja). Asimismo, se estudió la correlación entre el número de territorios con defectos de perfusión y el número de vasos enfermos encontrados en la coronariografía. Resultados: En cuanto al diagnóstico de enfermedad coronaria, se obtuvo una sensibilidad, especificidad, valor predictivo positivo, valor predictivo negativo e índice Kappa de 100 por ciento, 50 por ciento, 83 por ciento, 100 por ciento y 0,55 por ciento, respectivamente. Para la enfermedad multivaso, estos valores fueron 83 por ciento, 63 por ciento, 63 por ciento, 83 por ciento y 0,43 por ciento respectivamente. La correlación entre el número de territorios con defectos de perfusión y el número de vasos enfermos mostró un índice de correlación de 0,61 (p = 0,02). Para la arteria descendente anterior, la sensibilidad y especificidad fueron 83 por ciento y 88 por ciento, respectivamente. Para la coronaria derecha, estos valores fueron 100 por ciento y 44 por ciento, y para la circunfleja 38 por ciento y 83 por ciento, respectivamente. Conclusiones: En pacientes portadores de MVP y con sospecha de enfermedad coronaria, la gammagrafía de perfusión miocárdica con Tc-Tf y estímulo con dipiridamol es de gran utilidad en la detección de enfermedad coronaria y la valoración de su extensión (AU)


Subject(s)
Aged , Aged, 80 and over , Male , Female , Humans , Tomography, Emission-Computed, Single-Photon , Pacemaker, Artificial , Risk Factors , Sensitivity and Specificity , Vasodilator Agents , Comorbidity , Organotechnetium Compounds , Radiopharmaceuticals , Coronary Angiography , Myocardial Infarction , Organophosphorus Compounds , Arrhythmias, Cardiac , Dipyridamole , Coronary Circulation , Angina Pectoris , Cardiac Catheterization , Predictive Value of Tests
11.
Rev Esp Med Nucl ; 20(1): 4-10, 2001 Feb.
Article in Spanish | MEDLINE | ID: mdl-11181323

ABSTRACT

BACKGROUND AND OBJECTIVES: Administration of dipyridamole produces angina and ST depression in 20%-30% and 6%-34% of patients, respectively. This study aimed to evaluate the clinical implications of the presentation of angina and/or ST depression during the administration of dipyridamole in the study of coronary heart disease by myocardial perfusion SPECT (MPS). METHODS: The study population is constituted by 593 consecutive patients without left branch block or ventricular pacemaker rhythm who were referred to our service to undergo MPS with dipyridamole. A SPECT was performed after the administration of 99mTc-tetrosfosmine and drug stimulation with dipyridamole (0.142 mg/kg/min for 4 minutes). A coronariography was performed in 338 patients (57%). The frequency of clinical and electrical positivity and their relationship with the MPS and the coronariography were studied. RESULTS: The rate of angina and ST depression was 32% (n = 190) and 10% (n = 58), respectively. Myocardial perfusion defects were observed in 465 patients (78%), and signs of scintigraphic ischemia in 311 (52%). The patients with ST depression presented a higher frequency of perfusion defects (93% vs 76%, p = 0.0012) and scintigraphic ischemia (89% vs 49%, p < 0.0001). In addition, perfusion defects in more than one territory were observed in these patients in a higher percentage (53% vs 34%, p = 0.0036). Among the patients who underwent cardiac catheterization, those who had a ST depression had a greater extension of coronary heart disease (1.8 +/- 1.2 vs 1.3 +/- 1.0 diseased vessels, respectively. p = 0.0100) and a higher frequency of multivessel disease (61% vs 43%, p = 0.0380). Those patients who had clinical positivity showed a scintigraphic ischemia more frequently (66% vs 47%, p < 0.0001), however no statistically significant differences were observed between the presence of patients with perfusion defects or in the extension of these defects as well as in the number of diseased vessels in the coronariographic study. CONCLUSIONS: During the administration of dipyridamole, the ST depression is associated with more frequent scintigraphic ischemia, larger extension of perfusion defects and more diseased vessels. The appearance of angina is associated with scintigraphic ischemia, but it is not necessarily associated with the extension of perfusion defects or greater number of diseased vessels.


Subject(s)
Coronary Disease/diagnostic imaging , Dipyridamole , Electrocardiography/drug effects , Heart/diagnostic imaging , Organophosphorus Compounds , Organotechnetium Compounds , Radiopharmaceuticals , Tomography, Emission-Computed, Single-Photon , Vasodilator Agents , Angina Pectoris/chemically induced , Angina Pectoris/diagnostic imaging , Convalescence , Coronary Angiography , Coronary Circulation , Dipyridamole/pharmacology , False Negative Reactions , False Positive Reactions , Heart/drug effects , Humans , Myocardial Infarction/diagnostic imaging , Myocardial Ischemia/diagnostic imaging , Predictive Value of Tests , Vasodilator Agents/pharmacology
12.
Oncología (Barc.) ; 24(2): 58-63, feb. 2001. tab, ilus
Article in Es | IBECS | ID: ibc-15240

ABSTRACT

Propósito: Evaluar la eficacia de la biopsia del ganglio centinela (BGC), sin utilizar colorante azul, en pacientes con melanoma cutáneo. Material y métodos: Estudio prospectivo llevado a cabo sobre 42 pacientes consecutivos con melanomas primarios en estadio I-II según la AJCC. La BGC ha sido realizada mediante la combinación de linfogammagrafía preoperatoria y localización intraoperatoria del GC usando exclusivamente un detector manual de rayos gamma. Resultados: Se extirparon un total de 43 melanomas primarios en 42 pacientes. De los 46 GC identificados mediante la gammagrafia preoperatoria se consiguieron encontrar 45 durante la intervención, alcanzando un éxito en la técnica del 97,8 por ciento . Entre las 36 regiones ganglionares con BGC negativa ha aparecido una recidiva local, la cual ha sido considerada como un probable falso negativo (2,7 por ciento). Conclusiones: 1 ) La BGC es útil en el estadiaje y como factor pronóstico del melanoma cutáneo. 2) La inyección de colorante azul perdesional podría llegar a ser innecesaria en la BGC si se obtienen buenos resultados con la linfogammagrafía + detector manual de rayos gamma (AU)


Subject(s)
Adult , Female , Male , Humans , Biopsy , Ganglia , Melanoma , Prospective Studies
13.
Rev. esp. med. nucl. (Ed. impr.) ; 20(1): 4-10, feb. 2001.
Article in Es | IBECS | ID: ibc-803

ABSTRACT

Introducción y objetivos: La administración de dipiridamol produce angina y depresión del ST en el 20-30 por ciento y el 6-34 por ciento de los pacientes, respectivamente. El objetivo de este estudio fue evaluar las implicaciones diagnósticas de la producción de angina y/o depresión del segmento ST durante la administración de dipiridamol en el estudio de la enfermedad coronaria mediante gammagrafía de perfusión miocárdica (GPM). Métodos: La población de estudio está compuesta por 593 pacientes consecutivos sin bloqueo de rama izquierda ni ritmo de marcapasos ventricular que fueron remitidos a nuestro servicio para la realización de GPM con dipiridamol. Se realizó SPECT tras la administración de 99mTc-tetrofosmina y estímulo farmacológico con dipiridamol (0,142 mg/kg/min durante 4 minutos). En 338 pacientes (57 por ciento), se realizó coronariografía. Se estudió la frecuencia de positividad clínica y eléctrica, así como su relación con los resultados de la GPM y de la coronariografía. Resultados: La frecuencia de angina y de depresión del ST fue del 32 por ciento (n = 190) y 10 por ciento (n = 58), respectivamente. Se observaron defectos de perfusión en 465 pacientes (78 por ciento), y signos de isquemia gammagráfica en 311 (52 por ciento). Los pacientes con descenso del ST presentaron más frecuentemente defectos de perfusión (93 por ciento vs 76 por ciento, p = 0,0012) e isquemia gammagráfica (89 por ciento vs 49 por ciento, p < 0,0001). Además, en estos pacientes se observaron defectos de perfusión en más de un territorio con un mayor porcentaje (53 por ciento vs 34 por ciento, p = 0,0036). Entre los pacientes que fueron sometidos a coronariografía, los pacientes con descenso del ST tuvieron mayor extensión de la enfermedad coronaria (1,8 ñ 1,2 vs 1,3 ñ 1,0 vasos enfermos, respectivamente; p = 0,0100) y una mayor frecuencia de enfermedad multivaso (61 por ciento vs 43 por ciento, p = 0,0380). Los pacientes con positividad clínica presentaron isquemia gammagráfica con mayor frecuencia (66 por ciento vs 47 por ciento, p < 0,0001), pero no se observaron diferencias estadísticamente significativas en cuanto a la proporción de pacientes con defectos de perfusión ni en la extensión de estos defectos, así como en el número de vasos enfermos en la coronariografía. Conclusión: El descenso del ST durante la administración de dipiridamol se asocia a una más frecuente isquemia gammagráfica y a mayor extensión de los defectos de perfusión, así como a un mayor número de vasos enfermos. La aparición de angina se asocia a isquemia gammagráfica, pero no implica necesariamente una mayor extensión de los defectos de perfusión, ni tampoco una mayor extensión de la enfermedad coronaria (AU)


Subject(s)
Humans , Tomography, Emission-Computed, Single-Photon , Vasodilator Agents , Organotechnetium Compounds , Radiopharmaceuticals , Myocardial Ischemia , Coronary Angiography , Myocardial Infarction , Organophosphorus Compounds , Coronary Disease , Coronary Circulation , Convalescence , Dipyridamole , Angina Pectoris , Electrocardiography , False Positive Reactions , False Negative Reactions , Heart , Predictive Value of Tests
14.
Rev Esp Med Nucl ; 19(6): 409-15, 2000 Oct.
Article in Spanish | MEDLINE | ID: mdl-11060270

ABSTRACT

BACKGROUND AND OBJECTIVES: Although it has been suggested that bone scintigraphy (BS) may not be necessary in patients with prostate adenocarcinoma (PA) and normal prostate specific antigen (PSA) plasma levels, controversy still remains. The objective of the study was to evaluate the existing relationship between PSA plasma levels and BS findings in patients with a recently diagnosed PA in order to assess whether BS may be omitted on the basis of the PSA levels in these patients. METHODS: The 475 patients (70+/-7 years old) consecutively diagnosed of PA between 1994 and 1998 in our institution made up the study population. PSA plasmatic levels were determined and BS was performed (body planar study after 99mTc-methyl diphosphonate 900 MBq administration) in all the patients. RESULTS: In 362 patients (76.2%), BS was negative, in 108 (22.7%) positive and undetermined in the remaining 5 patients (1.1%). The mean PSA level in the whole study population was 74+/-267 ng/ml (range 0.4-4.200) and was higher in patients with positive GO (218+/-512 vs 31+/-89, p<0,0001). As PSA increased, the rate of patients with positive BS was significantly higher, this being 0%, 16.4%, 9.7%, 14.0%, 31.0% and 48.3% in patients with PSA 4, 4.1-10; 10.1-20; 20.1-30; 30.1-40, and >40 ng/ml, respectively (p<0.0001). In patients with positive BS, the PSA levels were 20 and 10 ng/ml in 30.6% and 18.6% of the patients, respectively. CONCLUSION: According to our experience, there is a significant association between PSA plasma levels and the BS results in patients with recently diagnosed PA. However, a significant proportion of patients with bone metastasis have normal PSA levels, and therefore BS should be performed in all patients with recently diagnosed PA regardless of the PSA levels.


Subject(s)
Bone Neoplasms/diagnostic imaging , Prostate-Specific Antigen/blood , Prostatic Neoplasms/blood , Prostatic Neoplasms/diagnostic imaging , Aged , Aged, 80 and over , Bone Neoplasms/blood , Bone Neoplasms/secondary , Humans , Male , Middle Aged , Multivariate Analysis , Neoplasm Staging , Predictive Value of Tests , Prostatic Neoplasms/pathology , ROC Curve , Radionuclide Imaging , Retrospective Studies , Sensitivity and Specificity
15.
Rev Esp Med Nucl ; 19(5): 337-73, 2000 Sep.
Article in Spanish | MEDLINE | ID: mdl-11062109

ABSTRACT

The objective of the study was to evaluate the results of the myocardial scintigraphy with 99mTc-tetrofosmin (Tc-Tf) and pharmacological stimulation with dipyridamole in patients diagnosed of microvascular angina. The study population is made up of 50 patients discharged with the diagnosis of microvascular angina who had undergone Tc-Tf-dipyridamole. Clinical and electrical positivity appeared in 40% and 12% of the patients, respectively. Myocardial perfusion defects were found in 35 patients (70%), and were reversible in 21 (60%), fixed in 11 (21%), and combined in 3 (9%). Abnormalities were inferior, anteroseptal and lateral in 21, 18, and 2 patients, respectively. Patients with a positive exercise treadmill test, compared with those with a negative one, had more frequent perfusion abnormalities (91% vs 50%, p = 0.0327) and myocardial ischemia (64% vs 20%, p = 0.392). Women, in comparison with men, had angina (56% vs 22%, p = 0.013), and anteroseptal perfusion abnormalities (26% vs 4%, p = 0.028) more frequently. On the contrary, men had inferior perfusion abnormalities more frequently (57% vs 30%, p = 0.057). Thus, Tc-Tf-dipyridamole shows perfusion abnormalities in 70% of patients with microvascular angina (91% in patients with a positive exercise treadmill test). Scintigraphic pattern may be partially conditioned by gender in these patients.


Subject(s)
Dipyridamole , Heart/diagnostic imaging , Microvascular Angina/diagnostic imaging , Organophosphorus Compounds , Organotechnetium Compounds , Radiopharmaceuticals , Vasodilator Agents , Coronary Circulation , Female , Humans , Male , Middle Aged , Radionuclide Imaging , Retrospective Studies
16.
Rev. esp. med. nucl. (Ed. impr.) ; 19(6): 409-415, oct. 2000.
Article in Es | IBECS | ID: ibc-5817

ABSTRACT

Introducción y objetivos: Aunque se ha sugerido que en los pacientes con adenocarcinoma de próstata (AP) la existencia de unos niveles plasmáticos no elevados de antígeno específico prostático (PSA) podría hacer innecesaria la realización de gammagrafía ósea (GO), aún existen controversias al respecto. El objetivo del estudio fue analizar la relación existente entre los niveles de PSA y los hallazgos de la GO en pacientes con diagnóstico de AP, con objeto de evaluar si en nuestra experiencia la indicación de la GO puede ser omitida en función de los niveles de PSA en estos pacientes. Métodos: La población de estudio está compuesta por los 475 pacientes (70ñ7 años de edad) diagnosticados de AP entre 1994 y 1998. A todos los pacientes se les realizó GO (estudio planar de cuerpo completo tras la administración de 900 MBq de 99mTC-metil difosfonatos) y determinación de los niveles plasmáticos de PSA. Resultados: En 362 pacientes la GO fue negativa (76,2 por ciento) en 108 (22,7 por ciento) positiva y dudosa en los restantes cinco pacientes (1,1 por ciento). El nivel de PSA en el total de la población de estudio fue 74ñ267 ng/ml (rango 0,4-4.200). Los pacientes con metástasis óseas tenían unos niveles de PSA más elevados (218ñ512 vs 31ñ89, p40 ng/ml, respectivamente (p<0,0001). El 30,6 por ciento de los pacientes con metástasis tenían unos niveles de PSA 20 ng/ml, y el 18,6 por ciento 10 ng/ml. Conclusión: Según nuestra experiencia, en los pacientes con AP existe una relación entre los niveles plasmáticos de PSA y la probabilidad de presentar metástasis en la GO. Sin embargo, una proporción importante de pacientes con metástasis tienen unos niveles no elevados de PSA, por lo que la GO debería ser realizada con todo paciente con AP, independientemente de los niveles basales de PSA (AU)


Subject(s)
Middle Aged , Aged, 80 and over , Aged , Male , Humans , Sensitivity and Specificity , ROC Curve , Multivariate Analysis , Prostate-Specific Antigen , Retrospective Studies , Neoplasm Staging , Predictive Value of Tests , Prostatic Neoplasms , Bone Neoplasms
17.
Rev. esp. med. nucl. (Ed. impr.) ; 19(5): 337-343, sept. 2000.
Article in Es | IBECS | ID: ibc-5807

ABSTRACT

El objetivo del estudio fue analizar los resultados de la gammagrafía de perfusión miocárdica con 99m Tc-tetrofosmina (Tc-Tf) y estímulo con dipiridamol en pacientes diagnosticados de angina microvascular. La población de estudio está compuesta por 50 pacientes que habían sido dados de alta con el diagnóstico de angina microvascular y a los que se había realizado Tc-Tf-dipiridamol. La prueba fue clínica y eléctricamente positiva en el 40 por ciento y el 12 por ciento de los casos, respectivamente. Se encontraron defectos de perfusión en 35 pacientes (70 por ciento), que fueron reversibles en 21 (60 por ciento), fijos en 11 (21 por ciento), y mixtos en 3 (9 por ciento). En cuanto a la localización de los defectos de perfusión, ésta fue en el territorio de la coronaria derecha en 21 pacientes, de la descendente anterior en 18, y de la circunfleja en 2.Los pacientes que habían realizado una prueba de esfuerzo positiva, en comparación con los que habían realizado una ergometría negativa, presentaron más frecuentemente defectos de perfusión (91 por ciento vs 50 por ciento, p = 0,0327) e isquemia gammagráfica (64 por ciento vs 20 por ciento, p = 0,392). La aparición de angina fue más frecuente en mujeres que en varones (56 por ciento vs 22 por ciento, p = 0,013), así como la existencia de defectos de perfusión en el territorio de la arteria descendente anterior (26 por ciento vs 4 por ciento, p = 0,028). Los varones, por el contrario, mostraron más frecuentemente defectos de perfusión en la cara inferior (57 por ciento vs 30 por ciento, p = 0,057). En conclusión, el Tc-Tf-dipiridamol muestra alteraciones de la perfusión en el 70 por ciento de los pacientes diagnosticados de angina microvascular, siendo esta proporción del 91 por ciento en pacientes con ergometría positiva. El patrón gammagráfico en estos pacientes puede estar condicionado, en parte, por el sexo. (AU)


Subject(s)
Middle Aged , Male , Female , Humans , Vasodilator Agents , Organotechnetium Compounds , Radiopharmaceuticals , Organophosphorus Compounds , Retrospective Studies , Dipyridamole , Coronary Circulation , Heart , Microvascular Angina
18.
Rev Esp Med Nucl ; 19(1): 3-10, 2000 Feb.
Article in Spanish | MEDLINE | ID: mdl-10758431

ABSTRACT

BACKGROUND: In patients with left bundle branch block, the 201Tl scintigraphic studies show high sensitivity, but with low specificity, in the diagnosis of coronary artery disease. OBJECTIVE: [corrected] To assess the value of 99mTc-tetrofosmin Single Photon Emission Computed Tomography (SPECT) and dipyridamole administration in patients with left bundle branch block. METHODS: 22 patients with angina and left bundle branch block were retrospectively studied by cardiac catheterization and Tc-Tf after dipyridamole administration (0,142 mg/kg/min. i.v.) and at rest. RESULTS: The mean number of territories with perfusion defects was 1.5+/-1.0, and the average number of diseased vessels in the coronariographic study was 1.6+/-1.3 (r = 0.77, p<0.001). Sensitivity, specificity, positive predictive value, negative predictive value, total predictive value and Kappa index in the diagnosis of multivessel disease were 92%, 90%, 92%, 90%, 91% and 0.82, respectively. In the diagnosis of anterior descending artery disease, these values were 83%, 70%, 77%, 78%, 77%, and 0.54, respectively. CONCLUSION: In patients with angina and left bundle branch block, SPECT with Tc-Tf-dipyridamole is of great value in the study of coronary artery disease extension. Sensitivity and specificity for the diagnosis of anterior descending artery disease were similar to that shown in series with thallium-dipyridamole.


Subject(s)
Bundle of His/diagnostic imaging , Bundle-Branch Block/diagnostic imaging , Dipyridamole , Organophosphorus Compounds , Organotechnetium Compounds , Radiopharmaceuticals , Tomography, Emission-Computed, Single-Photon , Female , Humans , Male , Middle Aged , Retrospective Studies , Sensitivity and Specificity
19.
Rev. esp. med. nucl. (Ed. impr.) ; 19(1): 3-10, feb. 2000.
Article in Es | IBECS | ID: ibc-5781

ABSTRACT

Introducción: En los pacientes con bloqueo de rama izquierda, los estudios isotópicos con 201Tl poseen una elevada sensibilidad en el diagnóstico de enfermedad coronaria, aunque con una escasa especificidad.Objetivo: Analizar la utilidad del Single Photon Emission Computed Tomography (SPECT) con 99mTc-tetrofosmin y estímulo con dipiridamol en pacientes con bloqueo de rama izquierda.Métodos: Se estudiaron retrospectivamente 22 pacientes con bloqueo de rama izquierda y clínica de angina mediante coronariografía y Tc-Tf tras administración de dipiridamol (0,142 mg/kg/min i.v.) y en reposo.Resultados: El número de territorios con defectos de perfusión fue 1,5 ñ 1,0, y el número de vasos enfermos en la coronariografía 1,6 ñ 1,3 (r = 0,77; p < 0,001). La sensibilidad, especificidad, valor predictivo positivo, valor predictivo negativo, valor predictivo total e índice Kappa para el diagnóstico de enfermedad multivaso fueron, respectivamente, 92 por ciento, 90 por ciento, 92 por ciento, 90 por ciento, 91 por ciento y 0,82. Para el diagnóstico de la enfermedad de la arteria descendente anterior, estos valores fueron, respectivamente, 83 por ciento, 70 por ciento, 77 por ciento, 78 por ciento, 77 por ciento y 0,54.Conclusión: En pacientes con angina y bloqueo de rama izquierda, el Tc-Tf y estímulo con dipiridamol es de gran utilidad en el estudio de extensión de enfermedad coronaria. La sensibilidad y especificidad para el diagnóstico de la enfermedad de la arteria descendente anterior fueron similares a las mostradas en estudios realizados mediante taliodipiridamol (AU)


Background: In patients with left bundle branch block, the 201Tl scintigraphic studies show high sensitivity, but with low specificity, in the diagnosis of coronary artery disease. Objetive: To assess the value of 99mTc-tetrofosmin Single Photon Emission Computed Tomography (SPECT) and dipyridamole administration in patients with left bundle branch block. Methods: 22 patients with angina and left bundle branch block were retrospectively studied by cardiac catheterization and Tc-Tf after dipyridamole administration (0,142 mg/kg/min. i.v.) and at rest. Results: The mean number of territories with perfusion defects was 1.5 ± 1.0, and the average number of diseased vessels in the coronariographic study was 1.6 ± 1.3 (r = 0.77, p < 0.001). Sensitivity, specificity, positive predictive value, negative predictive value, total predictive value and Kappa index in the diagnosis of multivessel disease were 92%, 90%, 92%, 90%, 91% and 0.82, respectively. In the diagnosis of anterior descending artery disease, these values were 83%, 70%, 77%, 78%, 77%, and 0.54, respectively. Conclusion: In patients with angina and left bundle branch block, SPECT with Tc-Tf-dipyridamole is of great value in the study of coronary artery disease extension. Sensitivity and specificity for the diagnosis of anterior descending artery disease were similar to that shown in series with thallium-dipyridamole (AU)


Subject(s)
Middle Aged , Male , Female , Humans , Tomography, Emission-Computed, Single-Photon , Sensitivity and Specificity , Organotechnetium Compounds , Radiopharmaceuticals , Organophosphorus Compounds , Retrospective Studies , Bundle-Branch Block , Dipyridamole , Bundle of His
20.
Rev Esp Med Nucl ; 18(5): 340-7, 1999 Oct.
Article in Spanish | MEDLINE | ID: mdl-10562663

ABSTRACT

UNLABELLED: Captopril renography (CR) has been shown to be a useful technique in the diagnosis of renovascular hypertension (RVH). This disease is a significant complication of the kidney transplanted patient so that early diagnosis would be extremely useful to preserve renal function and prevent graft loss. This work evaluates the role of CR, together with arteriography and doppler-ultrasound, in the diagnosis of RVH. MATERIALS: A total of 19 transplanted patients with clinical suspicion of RVH underwent an isotopic study, a doppler-ultrasound study and an arteriography. Scintigraphy was performed 1 hour after a 50 mg dose of captopril, with oral hydration and i.v. administration of approximately 111 MBq of 99mTc-MAG3 and 20 mg of furosemide. If abnormal, a subsequent renography in baseline conditions was performed for comparison. RESULTS: Overall, 11 patients had renovascular hypertension. Sensitivity and specificity of CR were 91% and 80% respectively, 100% and 60% for US and 91% and 100% for arteriography. The CR yielded one false positive result and 2 false negatives cases: one with 50% stenosis and one polar artery stenosis. Six patients were successfully dilated or operated. CONCLUSION: CR seems to be a reliable diagnostic tool for the diagnosis of renovascular hypertension in kidney transplanted patients.


Subject(s)
Hypertension, Renovascular/diagnostic imaging , Kidney Transplantation , Postoperative Complications/diagnostic imaging , Adult , Angiotensin-Converting Enzyme Inhibitors , Captopril , Catheterization , Female , Humans , Kidney Function Tests , Male , Middle Aged , Postoperative Complications/therapy , Predictive Value of Tests , Radiography , Radionuclide Imaging , Radiopharmaceuticals , Renal Artery/diagnostic imaging , Renal Artery Obstruction/diagnostic imaging , Renal Artery Obstruction/therapy , Sensitivity and Specificity , Technetium Tc 99m Mertiatide , Ultrasonography, Doppler
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