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1.
Rev. esp. med. nucl. (Ed. impr.) ; 30(2): 97-100, mar.-abr. 2011. ilus
Article in Spanish | IBECS | ID: ibc-86205

ABSTRACT

La esplenosis se define como el autotrasplante heterotópico de tejido esplénico como resultado de una rotura del bazo por trauma o cirugía. Es una condición benigna y de hallazgo casual, aunque en ciertas ocasiones las pruebas de imagen puedan orientar a malignidad simulando tumores renales, linfomas abdominales y endometriosis, entre otros. Presentamos el caso de un varón de 42 años al que, tras un estudio por dolor abdominal, se le realiza una resonancia magnética en la que se observan múltiples adenopatías en el abdomen que pueden orientar a un síndrome linfoproliferativo. Como antecedente importante, presenta esplenectomía por trauma abdominal a los 9 años. Tras varios estudios, se decide realizar una gammagrafía con hematíes desnaturalizados marcados con tecnecio-99m que muestra múltiples depósitos patológicos distribuidos por todo el abdomen e, incluso, la pelvis, siendo este hallazgo compatible con esplenosis(AU)


Splenosis is defined as the heterotopic autotransplantation of splenic tissue because of a ruptured spleen due to trauma or surgery. It is a benign and incidental finding, although imaging tests may sometimes orient toward malignancy simulating renal tumors, abdominal lymphomas, endometriosis, among other. We report the case of a 42-year old male in whom a MRI was performed after a study due to abdominal pain. Multiple enlarged lymph nodes were observed in the abdomen, suggestive of lymphoproliferative disease. As an important background, splenectomy was carried out due to abdominal trauma at age 9. After several studies, it was decided to perform a 99mTc-labeled heat-damaged red blood cell scintigraphy that showed multiple pathological deposits distributed throughout the abdomen, and even the pelvis, being consistent with splenosis(AU)


Subject(s)
Humans , Male , Adult , Splenosis , Technetium , Erythrocytes , Magnetic Resonance Imaging/instrumentation , Magnetic Resonance Imaging , Lymphoproliferative Disorders , /methods , Radiography, Thoracic/methods , Splenosis/physiopathology , Abdominal Pain/etiology , Abdominal Pain , Splenectomy/methods , Nuclear Medicine/methods
2.
Rev Esp Med Nucl ; 30(2): 97-100, 2011.
Article in Spanish | MEDLINE | ID: mdl-20570413

ABSTRACT

Splenosis is defined as the heterotopic autotransplantation of splenic tissue because of a ruptured spleen due to trauma or surgery. It is a benign and incidental finding, although imaging tests may sometimes orient toward malignancy simulating renal tumors, abdominal lymphomas, endometriosis, among other. We report the case of a 42-year old male in whom a MRI was performed after a study due to abdominal pain. Multiple enlarged lymph nodes were observed in the abdomen, suggestive of lymphoproliferative disease. As an important background, splenectomy was carried out due to abdominal trauma at age 9. After several studies, it was decided to perform a (99m)Tc-labeled heat-damaged red blood cell scintigraphy that showed multiple pathological deposits distributed throughout the abdomen, and even the pelvis, being consistent with splenosis.


Subject(s)
Splenosis/diagnostic imaging , Abdominal Injuries/surgery , Abdominal Pain/etiology , Adult , Bromhexine , Cholestasis/diagnosis , Diagnosis, Differential , Erythrocytes , Humans , Incidental Findings , Lymphatic Metastasis , Lymphoproliferative Disorders/diagnosis , Magnetic Resonance Imaging , Male , Postoperative Complications/diagnostic imaging , Postoperative Complications/etiology , Postoperative Complications/pathology , Radiography , Radionuclide Imaging , Radiopharmaceuticals , Spleen/injuries , Spleen/surgery , Splenectomy , Splenosis/epidemiology , Splenosis/etiology , Splenosis/pathology , Technetium , Time Factors
3.
Rev. esp. med. nucl. (Ed. impr.) ; 29(3): 114-121, mayo-jun. 2010. tab, ilus
Article in Spanish | IBECS | ID: ibc-79410

ABSTRACT

ObjetivoRevaluar la dosis efectiva (E) de las exploraciones típicas en Medicina Nuclear teniendo en cuenta los nuevos factores de ponderación de la Comisión Internacional de Protección Radiológica (ICRP) 103 y los datos más actualizados en cuanto a la dosimetría, y relacionar la E con el tiempo equivalente de radiación natural (TERN).Material y métodosSe ha calculado la E asociada a los radiofármacos y a las exploraciones habituales en Medicina Nuclear para las edades: adulto, 15, 10, 5 y 1 año. Se han empleado los datos dosimétricos de ICRP-106, ICRP-80, ICRP-53 y/o prospecto del fabricante.ResultadosSe muestra una relación de datos de E asociada a radiofármacos y exploraciones. Los nuevos factores de ponderación de tejidos dan como resultado un valor disminuido de la E, excepto en aquellos casos que afectan especialmente a la mama, para los que aumenta. La E asociada a las exploraciones de Medicina Nuclear está en el rango de 0,1–60mSv. El TERN va desde unos pocos días a una veintena de años. La E asociada a exploraciones que se realizan en niños es, en general, superior a la E correspondiente en adulto.ConclusionesLos resultados mostrados en este trabajo constituyen una colección actualizada de valores de E para los radiofármacos de uso habitual en Medicina Nuclear. Expresar la E en unidades de TERN ayuda a explicar a los pacientes y al personal sanitario cuestiones relacionadas con la exposición a la radiación asociada a una exploración(AU)


ObjectiveRe-evaluate the effective dose (E) of typical nuclear medicine procedures using the new ICRP-103 weighting factors and the latest dosimetry data and relate E with Background Equivalent Radiation Time (BERT).Material and MethodsEffective dose associated with radiopharmaceuticals and nuclear medicine procedures has been calculated for the following ages: adult, 15, 10, 5 and 1 year. Dosimetry data have been extracted from ICRP-106, ICRP-80, ICRP-53 and/or manufacturer's brochure.ResultsThe relationship of the data of effective dose associated with radiopharmaceuticals and explorations is shown. The new tissue weighting factors result in a decreased value of the effective dose, except in cases that particularly affect the breast, in which it increases. The effective dose associated with nuclear medicine procedures is in the range 0.1–60mSv. BERT ranges from a few days to 20 years. The effective dose associated to tests in children is generally higher than the effective dose for an adult.ConclusionsThe results shown in this paper are an updated collection of effective dose values for commonly used radiopharmaceuticals in nuclear medicine. Expressing the effective dose equivalent time in units of natural radiation helps to explain issues associated with radiation exposure to patients and healthcare personnel(AU)


Subject(s)
Humans , Radiation Dosage , Nuclear Medicine/standards , Radioisotopes/administration & dosage , Radiometry , Dose-Response Relationship, Radiation
4.
Rev Esp Med Nucl ; 29(3): 114-21, 2010.
Article in Spanish | MEDLINE | ID: mdl-20399539

ABSTRACT

OBJECTIVE: Re-evaluate the effective dose (E) of typical nuclear medicine procedures using the new ICRP-103 weighting factors and the latest dosimetry data and relate E with Background Equivalent Radiation Time (BERT). MATERIAL AND METHODS: Effective dose associated with radiopharmaceuticals and nuclear medicine procedures has been calculated for the following ages: adult, 15, 10, 5 and 1 year. Dosimetry data have been extracted from ICRP-106, ICRP-80, ICRP-53 and/or manufacturer's brochure. RESULTS: The relationship of the data of effective dose associated with radiopharmaceuticals and explorations is shown. The new tissue weighting factors result in a decreased value of the effective dose, except in cases that particularly affect the breast, in which it increases. The effective dose associated with nuclear medicine procedures is in the range 0.1-60 mSv. BERT ranges from a few days to 20 years. The effective dose associated to tests in children is generally higher than the effective dose for an adult. CONCLUSIONS: The results shown in this paper are an updated collection of effective dose values for commonly used radiopharmaceuticals in nuclear medicine. Expressing the effective dose equivalent time in units of natural radiation helps to explain issues associated with radiation exposure to patients and healthcare personnel.


Subject(s)
Algorithms , Dose-Response Relationship, Radiation , Nuclear Medicine/statistics & numerical data , Radiometry/statistics & numerical data , Adult , Age Factors , Child , Humans , Organ Specificity , Radiation Dosage , Radioisotopes/administration & dosage , Reference Standards
5.
Rev. esp. med. nucl. (Ed. impr.) ; 29(1): 25-28, ene.-feb. 2010. ilus
Article in Spanish | IBECS | ID: ibc-75516

ABSTRACT

IntroducciónEl tumor carcinoide es una rara neoplasia de origen neuroendocrino con localizaciones diversas, siendo las más frecuentes en la edad pediátrica el apéndice y el pulmón. La gammagrafía con 111In-DTPA-d-Phe1-octreótido ha supuesto un considerable avance en el diagnóstico de extensión de pacientes con tumor carcinoide. Presentamos tres pacientes pediátricos con carcinoide bronquial (CB) explorados con gammagrafía con análogos de la somatostatina (GRSS).La primera paciente (9 años) fue estudiada mediante GRSS tras cirugía por tumoración carcinoide en el lóbulo inferior derecho (LID), que objetivó resto tumoral (más evidente en el estudio tomográfico). Nuevos estudios de control con GRSS demostraron el aumento de tamaño del resto tumoral, la existencia de metástasis óseas, hepáticas y otro foco pulmonar de forma más precoz que las otras técnicas de imagen realizadas.La segunda paciente (10 años) acudió por tumoración endobronquial en el lóbulo inferior izquierdo (LII) junto con atelectasia del lóbulo superior izquierdo y enfisema del LII. Las técnicas de imagen radiológicas planteaban el diagnóstico diferencial entre tumor carcinoide endobronquial o granulomas de células plasmáticas o a cuerpo extraño. La GRSS mostró un depósito anormal de actividad en el hemitórax izquierdo compatible con tumoración carcinoide. No se visualizaron otras áreas sugestivas de metástasis. Tras la cirugía (resección endobronquial), los nuevos controles con GRSS mostraron ausencia de enfermedad.El tercer paciente (12 años) acudió tras lobectomía (lóbulo superior derecho) por CB. La GRSS no mostró áreas anormales de actividad. En un control posterior (3 meses) se visualizó un depósito de actividad en el tercio medio del hemitórax derecho, tras lo que se realizó lobectomía (LID y lóbulo medio), que objetivó pequeños restos de carcinoide neuroendocrino. Los controles posteriores fueron negativos...(AU)


IntroductionCarcinoid tumor is a rare neuroendocrine neoplasm with different locations, the most frequent ones during the pediatric age being the appendix and lung. Scintigraphy with 111In-DTPA-d-Phe1-octreotide has led to an importance advance in the diagnosis of extension in carcinoid tumor patients. We present three pediatric patients with bronchial carcinoid studied with somatostatin analogue scintigraphy (SSRS).Clinical casesThe first patient (9 years) was studied using the SSRS after surgery due to carcinoid tumor in the right lower lobe in which tumor remains was observed (this being clearer in the tomography study).The second patient (10 years) presented due to endobronchial tumor in the left lower lobe together with atelectasis of the LUL and emphysema of the LLL. Radiology imaging techniques suggested the differential diagnosis between the endobronchial carcinoid tumor or plasma cells or foreign body gramuloma. The SSRS showed an abnormal deposit of activity in the left hemithorax consisted with carcinoid tumor. No other areas suggesting metastasis were observed. After the surgery (endobronchial resection), new controls with SSRS showed absence of disease.The third patient (12 years) came after a lobectomy (RUL) due to bronchial carcinoid. The SSRS did not show any abnormal areas of activity. In the subsequent control (3 months), a deposit of activity was observed in the middle third of the right hemithorax, after which a lobectomy was performed (RLL and ML) that showed small remains of neuroendocrine carcinoid. Subsequent controls were negative.ConclusionThe SSRS has demonstrated great utility in the diagnosis, follow-up and staging of pediatric patients, carriers of neuroendocrine carcinoid tumors(AU)


Subject(s)
Humans , Male , Female , Child , Somatostatin , Carcinoma/complications , Carcinoma/diagnosis , Carcinoma, Bronchogenic/diagnosis , Ultrasonography/methods , Pneumonectomy/methods , Neoplasm Metastasis/pathology , Diagnosis, Differential , Prognosis
6.
Rev Esp Med Nucl ; 29(1): 25-8, 2010.
Article in Spanish | MEDLINE | ID: mdl-19819594

ABSTRACT

INTRODUCTION: Carcinoid tumor is a rare neuroendocrine neoplasm with different locations, the most frequent ones during the pediatric age being the appendix and lung. Scintigraphy with (111)In-DTPA-d-Phe(1)-octreotide has led to an importance advance in the diagnosis of extension in carcinoid tumor patients. We present three pediatric patients with bronchial carcinoid studied with somatostatin analogue scintigraphy (SSRS). CLINICAL CASES: The first patient (9 years) was studied using the SSRS after surgery due to carcinoid tumor in the right lower lobe in which tumor remains was observed (this being clearer in the tomography study). The second patient (10 years) presented due to endobronchial tumor in the left lower lobe together with atelectasis of the LUL and emphysema of the LLL. Radiology imaging techniques suggested the differential diagnosis between the endobronchial carcinoid tumor or plasma cells or foreign body gramuloma. The SSRS showed an abnormal deposit of activity in the left hemithorax consisted with carcinoid tumor. No other areas suggesting metastasis were observed. After the surgery (endobronchial resection), new controls with SSRS showed absence of disease. The third patient (12 years) came after a lobectomy (RUL) due to bronchial carcinoid. The SSRS did not show any abnormal areas of activity. In the subsequent control (3 months), a deposit of activity was observed in the middle third of the right hemithorax, after which a lobectomy was performed (RLL and ML) that showed small remains of neuroendocrine carcinoid. Subsequent controls were negative. CONCLUSION: The SSRS has demonstrated great utility in the diagnosis, follow-up and staging of pediatric patients, carriers of neuroendocrine carcinoid tumors.


Subject(s)
Biomarkers, Tumor/analysis , Bronchial Neoplasms/diagnostic imaging , Carcinoid Tumor/diagnostic imaging , Lung Neoplasms/diagnostic imaging , Neoplasm Proteins/analysis , Receptors, Somatostatin/analysis , Bronchial Neoplasms/chemistry , Bronchial Neoplasms/surgery , Carcinoid Tumor/chemistry , Carcinoid Tumor/surgery , Child , Diagnosis, Differential , Female , Humans , Indium Radioisotopes , Lung Neoplasms/chemistry , Lung Neoplasms/surgery , Male , Octreotide/analogs & derivatives , Pneumonectomy , Postoperative Care , Postoperative Complications/etiology , Pulmonary Atelectasis/etiology , Pulmonary Emphysema/etiology , Radionuclide Imaging , Radiopharmaceuticals , Reoperation
7.
Rev Esp Med Nucl ; 28(5): 242-5, 2009.
Article in Spanish | MEDLINE | ID: mdl-19922841

ABSTRACT

We present a clinical case of a 54-year-old woman that was admitted in our hospital with the diagnosis of fever of unknown origin. All the laboratory tests and imaging techniques did not manage to establish the fever's aetiology until a (67)Ga-citrate scan was performed and kidney uptake was observed, which lead to the clinical suspicion of drug-induced interstitial nephritis. The renal biopsy confirmed the diagnosis. This finding allowed corticoid therapy and cure.


Subject(s)
Citrates , Fever of Unknown Origin/etiology , Gallium , Nephritis, Interstitial/complications , Nephritis, Interstitial/diagnostic imaging , Radiopharmaceuticals , Female , Humans , Middle Aged , Radionuclide Imaging
8.
Rev. esp. med. nucl. (Ed. impr.) ; 28(5): 242-245, sept.-oct. 2009.
Article in Spanish | IBECS | ID: ibc-73594

ABSTRACT

Exponemos el caso de una paciente mujer de 54 años que ingresó en nuestro hospital para estudio de fiebre de origen desconocido.Todas las pruebas de laboratorio y de imagen no lograron establecer la causa de la fiebre y, al realizar una gammagrafía con 67Ga-citrato, se objetivó captación patológica en los riñones, lo que llevó a la sospecha clínica de nefritis intersticial inducida por medicamentos. La biopsia renal confirmó el diagnóstico. Este hallazgo permitió el tratamiento con corticoides y la curación de la enferma(AU)


We present a clinical case of a 54-year-old woman that was admitted in our hospital with the diagnosis of fever of unknown origin.All the laboratory tests and imaging techniques did not manage to establish the fever's aetiology until a 67Ga-citrate scan was performed and kidney uptake was observed, which lead to the clinical suspicion of drug-induced interstitial nephritis. The renal biopsy confirmed the diagnosis. This finding allowed corticoid therapy and cure(AU)


Subject(s)
Humans , Female , Middle Aged , Nephritis, Interstitial , Fever of Unknown Origin/complications , Fever of Unknown Origin/etiology , Biopsy/methods , Nephritis, Interstitial/complications , Nephritis, Interstitial/diagnosis , Nephritis, Interstitial , Fever of Unknown Origin
11.
Transplant Proc ; 40(9): 3020-2, 2008 Nov.
Article in English | MEDLINE | ID: mdl-19010178

ABSTRACT

BACKGROUND: The incidence and prevalence of heart failure (HF) are constantly increasing. Heart failure depends on pump failure, inflammatory tracers, and the neurohormonal system. At advanced stages, the only treatment is heart transplantation (HT). We studied myocardial innervation in patients before HT. MATERIALS AND METHODS: The study included 15 patients (11 men and 4 women; age range, 18-69 years) with a diagnosis of New York Heart Association class III-IV or IV HF. Planar thoracic images were obtained, at 15 minutes and 4 hours after injection of 10 mCi of iodine 123-metaiodobenzylguanidine ((123)I-MIBG). Adrenal activity was measured quantitatively using a heart-to-mediastinum count ratio and a myocardial washout rate. Pathologic results were considered if heart-to-mediastinum count ratio was less than 1.8 and washout rate was more than 35%. RESULTS: The qualitative analysis revealed decreased (123)I-MIBG myocardial uptake in all patients. Using the quantitative scale, patients were classified into four groups, as follows: group 1, physiologic innervation, no patients; group 2, mild myocardial adrenergic involvement, one patient (6.7%); group 3, moderate myocardial adrenergic involvement, five patients (33.3%); and group 4, severe myocardial adrenergic involvement, 9 patients (60%). The washout rate was pathologic in 11 of the 15 patients (73.3%). CONCLUSIONS: Scintigraphy using (123)I-MIBG is a useful method to evaluate prognosis in patients with advanced HF and can be used to assess transplantation priorities. It will be necessary to study a larger number of patients to confirm these findings.


Subject(s)
3-Iodobenzylguanidine/therapeutic use , Heart Failure/drug therapy , Heart Failure/surgery , Heart Transplantation/methods , Heart/innervation , 3-Iodobenzylguanidine/pharmacokinetics , Adolescent , Adult , Aged , Biological Transport , Child , Female , Heart/drug effects , Heart Failure/diagnostic imaging , Humans , Middle Aged , Premedication/methods , Prognosis , Tomography, Emission-Computed , Young Adult
15.
Rev Esp Med Nucl ; 25(3): 166-71, 2006.
Article in Spanish | MEDLINE | ID: mdl-16762270

ABSTRACT

OBJECTIVE: Relative renal function (RRF) quantification based on dimercaptosuccinic acid (DMSA) uptake is an established method for determining differential renal function. An abnormal kidney size may lead to an alteration in its RRF value, although it has no dysfunction. Therefore, it is useful to correct RRF values taking into account relative renal volumes, thus obtaining the normalized relative renal function (NRRF). The feasibility of the method used for volume correction, differences with respect to usual quantification and different normality intervals were studied. MATERIAL AND METHODS: A total of 187 DMSA renal scintigraphies (130 children and 57 adults) were studied. RRF was quantified and volume corrected to obtain NRRF. Patients were classified as normal or pathological using various normality intervals for NRRF. A second classification was performed depending on how the diagnostic changed after volume correction. RESULTS: An increase of pathological diagnosis was observed after volume correction, mainly in children. Using an intermediate estimation for the normality interval, 53% of the initially pathological diagnosis for children may be caused simply by different renal volumes. CONCLUSIONS: NRRF provides complementary information to RRF and helps to distinguish between a smaller kidney and a really hypofunctioning one in cases with abnormal RRF.


Subject(s)
Kidney Function Tests/methods , Kidney/physiopathology , Succimer , Adolescent , Adult , Age Factors , Aged , Aged, 80 and over , Algorithms , Child , Child, Preschool , Female , Humans , Infant , Infant, Newborn , Kidney/pathology , Kidney Diseases/diagnosis , Kidney Diseases/pathology , Kidney Diseases/physiopathology , Male , Middle Aged , Organ Size , Reference Values , Sex Factors , Succimer/pharmacokinetics
16.
Rev. esp. med. nucl. (Ed. impr.) ; 25(3): 166-171, mayo 2006. ilus, tab, graf
Article in Es | IBECS | ID: ibc-048039

ABSTRACT

Objetivo. La cuantificación de la función renal relativa (FRR) basada en la incorporación de ácido dimercaptosuccínico (DMSA) es un método establecido para la determinación del nivel de funcionamiento renal. Un tamaño anormal del riñón puede producir una alteración en el valor de su FRR, aunque no tenga disfunción alguna. Por tanto, resulta de utilidad corregir por volumen renal relativo los valores de la FRR, obteniendo así la función renal relativa normalizada (FRRN). En este trabajo se estudiará la viabilidad del método utilizado para la corrección por volumen, las diferencias respecto a la cuantificación habitual, y la influencia del margen de normalidad a aplicar. Material y métodos. Se estudiaron las gammagrafías renales con 99mTc-DMSA de 187 pacientes, 130 infantiles y 57 adultos. Se cuantificó la FRR y se corrigió por volumen para evaluar la FRRN. Se clasificaron los pacientes en normales o patológicos estableciendo varios márgenes de normalidad para la FRRN. Se realizó una segunda clasificación de los casos según cómo cambió su valoración al corregir por volumen. Resultados. Se observó un aumento de los diagnósticos patológicos al corregir por volumen, sobre todo en niños. Para el margen de normalidad aceptado se observó que del total de casos infantiles diagnosticados como patológicos inicialmente, el 53 % puede ser debido simplemente a una diferencia de volumen renal. Conclusiones. La FRRN proporciona una información complementaria a la FRR y ayuda a distinguir entre un riñón de menor tamaño y uno realmente hipocaptante en el caso de que la FRR resulte fuera de la normalidad


Objective. Relative renal function (RRF) quantification based on dimercaptosuccinic acid (DMSA) uptake is an established method for determining differential renal function. An abnormal kidney size may lead to an alteration in its RRF value, although it has no dysfunction. Therefore, it is useful to correct RRF values taking into account relative renal volumes, thus obtaining the normalized relative renal function (NRRF). The feasibility of the method used for volume correction, differences with respect to usual quantification and different normality intervals were studied. Material and methods. A total of 187 DMSA renal scintigraphies (130 children and 57 adults) were studied. RRF was quantified and volume corrected to obtain NRRF. Patients were classified as normal or pathological using various normality intervals for NRRF. A second classification was performed depending on how the diagnostic changed after volume correction. Results. An increase of pathological diagnosis was observed after volume correction, mainly in children. Using an intermediate estimation for the normality interval, 53 % of the initially pathological diagnosis for children may be caused simply by different renal volumes. Conclusions. NRRF provides complementary information to RRF and helps to distinguish between a smaller kidney and a really hypofunctioning one in cases with abnormal RRF


Subject(s)
Infant , Child , Adult , Aged , Adolescent , Middle Aged , Humans , Kidney/physiopathology , Succimer , Kidney Function Tests/methods , Age Factors , Algorithms , Kidney/pathology , Kidney Diseases/pathology , Kidney Diseases/physiopathology , Reference Values , Sex Factors , Succimer/pharmacokinetics
19.
Rev. esp. med. nucl. (Ed. impr.) ; 20(7): 517-524, dic. 2001.
Article in Es | IBECS | ID: ibc-770

ABSTRACT

Determinar la relación de captación de DMSA del riñón izquierdo frente al derecho, es teóricamente uno de los procedimientos cuantitativos más sencillos en medicina nuclear. La cuantificación puede realizarse sobre la proyección posterior, con o sin proyección lateral para la corrección de la profundidad renal. También puede determinarse la media geométrica usando las proyecciones anterior y posterior. El objetivo de este trabajo es investigar si existen diferencias importantes en la cuantificación de la función renal porcentual utilizando la media geométrica y usando la proyección posterior únicamente. Además tratamos de estudiar la influencia de la edad de los pacientes y la patología de base por la que se solicita la gammagrafía renal en estas diferencias. Por último proponemos un protocolo de trabajo donde indicamos los casos en los que aconsejamos la realización de la media geométrica para minimizar los errores posibles cometidos al utilizar únicamente la proyección posterior. Se han estudiado 328 gammagrafías renales con 99mTcDMSA realizadas en nuestro Servicio de Medicina Nuclear en los últimos 6 meses. La diferencia entre la función del riñón derecho en proyección posterior Rd (post) y el riñón derecho utilizando el método de la media geométrica Rd (MG) se calculó en todos los pacientes. Obtuvimos la media y la desviación estándar de las diferencias así como el coeficiente de correlación entre ambos métodos. Se empleó el test de la t de Student para determinar si la media de las diferencias entre ambos métodos difería estadísticamente de cero. Se encontraron diferencias estadísticamente significativas en los pacientes mayores de 9 años así como en los pacientes con malformaciones del tracto genitourinario (AU)


Subject(s)
Middle Aged , Child, Preschool , Child , Adult , Adolescent , Aged , Male , Infant , Female , Humans , Algorithms , Kidney Function Tests , Reproducibility of Results , Confidence Intervals , Radiopharmaceuticals , Age Factors , Kidney Diseases , Kidney , Technetium Tc 99m Dimercaptosuccinic Acid
20.
Rev. esp. med. nucl. (Ed. impr.) ; 20(7): 544-546, dic. 2001.
Article in Es | IBECS | ID: ibc-766

ABSTRACT

El histiocitoma fibroso maligno (HFM) es el tumor maligno de tejidos blandos más común en edades tardías. Se ha descrito que el HFM presenta avidez por el 67 Ga y tan solo un 38 por ciento de estos por el 99mTc-MDP, aunque pocos casos clínicos se han publicado. Presentamos el caso de un varón de 73 años con un HFM que presentó en la gammagrafía con 99mTc-MDP captación más intensa en fase vascular, siendo uno de los pocos casos descritos de HFM primario que no invaden hueso captadores de 99mTcMDP. En el presente trabajo además se revisan algunos de los casos de HFM publicados y las diferentes técnicas utilizadas para su diagnóstico y seguimiento. (AU)


Subject(s)
Aged , Male , Humans , Technetium Tc 99m Medronate , Radiopharmaceuticals , Neoplasm Invasiveness , Arm , Soft Tissue Neoplasms , Histiocytoma, Benign Fibrous
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