Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 10 de 10
Filtrar
1.
Int. braz. j. urol ; 45(4): 724-731, July-Aug. 2019. tab, graf
Artículo en Inglés | LILACS | ID: biblio-1019880

RESUMEN

ABSTRACT Objectives To evaluate the diagnostic performance and interobserver agreement of PI-RADS v2. Materials and Methods In this Institutional Review Board approved single-center retrospective study, 98 patients with clinically suspected PCa who underwent 3-T multiparametric MRI followed by MRI/TRUS fusion-guided prostate biopsy were included from June 2013 to February 2015. Two radiologists (R1 and R2) with 8 and 1 years of experience in abdominal radiology reviewed the MRI scans and assigned PI-RADS v2 scores in all prostate zones. PI-RADS v2 were compared to MRI/TRUS fusion-guided biopsy results, which were classified as negative, PCa, and significant PCa (sPCa). Results Sensitivity, specificity, NPV, PPV and accuracy for PCa was 85.7% (same for all metrics) for R1 and 81.6%, 79.6%, 81.2%, 80.0% and 80.6% for R2. For detecting sPCa, the corresponding values were 95.3%, 85.4%, 95.9%, 83.7% and 89.8% for R1 and 93.0%, 81.8%, 93.7%, 86.7% and 86.7% for R2. There was substantial interobserver agreement in assigning PI-RADS v2 score as negative (1, 2, 3) or positive (4, 5) (Kappa=0.78). On multivariate analysis, PI-RADS v2 (p <0.001) was the only independent predictor of sPCa compared with age, abnormal DRE, prostate volume, PSA and PSA density. Conclusions Our study population demonstrated that PI-RADS v2 had high diagnostic accuracy, substantial interobserver agreement, and it was the only independent predictor of sPCa.


Asunto(s)
Humanos , Masculino , Anciano , Neoplasias de la Próstata/diagnóstico por imagen , Imagen por Resonancia Magnética/métodos , Neoplasias de la Próstata/patología , Valores de Referencia , Brasil , Modelos Logísticos , Variaciones Dependientes del Observador , Reproducibilidad de los Resultados , Estudios Retrospectivos , Factores de Riesgo , Sensibilidad y Especificidad , Antígeno Prostático Específico/sangre , Estadísticas no Paramétricas , Medición de Riesgo , Clasificación del Tumor , Biopsia Guiada por Imagen/métodos , Persona de Mediana Edad
2.
Int. braz. j. urol ; 44(3): 642-644, May-June 2018. graf
Artículo en Inglés | LILACS | ID: biblio-954048

RESUMEN

ABSTRACT Renal replacement lipomatosis is a condition characterized by varying degrees of renal parenchymal atrophy and perirenal fibrofatty proliferation secondary to chronic inflammation such as xanthogranulomatous pyelonephritis. In severe cases, imaging findings can be misdiagnosed as retroperitoneal liposarcoma.


Asunto(s)
Humanos , Masculino , Neoplasias Retroperitoneales/diagnóstico por imagen , Pielonefritis Xantogranulomatosa/diagnóstico , Enfermedades Renales/diagnóstico por imagen , Lipomatosis/diagnóstico por imagen , Liposarcoma/diagnóstico por imagen , Neoplasias Retroperitoneales/patología , Pielonefritis Xantogranulomatosa/patología , Radiografía Abdominal , Tomografía Computarizada por Rayos X , Diagnóstico Diferencial , Enfermedades Renales/patología , Lipomatosis/patología , Liposarcoma/patología , Persona de Mediana Edad
4.
Int. braz. j. urol ; 42(3): 456-463, tab, graf
Artículo en Inglés | LILACS | ID: lil-785731

RESUMEN

ABSTRACT Purpose To describe our initial experience with radiofrequency ablation (RFA) of Bosniak IV renal cysts. Materials and Methods From 2010 to 2014, 154 renal tumor cases were treated with percutaneous thermal ablation, of which 10 cases (6.4%) from nine patients were complex renal cysts and were treated with radiofrequency ablation. Results All complex cysts were classified as Bosniak IV (four women and five men; mean age: 63.6 yrs, range: 33–83 years). One patient had a single kidney. Lesion size ranged from 1.5 to 4.1cm (mean: 2.5cm) and biopsy was performed on four cysts immediately before the procedure, all of which were malignant (two clear cell and two papillary carcinoma). Mean volume reduction of complex cysts was 25% (range: 10–40%). No patients required retreatment with RFA and no immediate or late complications were observed. The follow-up of Bosniak IV cysts had a median of 27 months (interquartile range [IQR], 23 to 38) and no recurrence or significant loss of renal function were observed. Conclusions Mid-term follow-up of the cases in our database suggests that image-guided percutaneous RFA can treat Bosniak IV cysts with very low complication rates and satisfactorily maintain renal function.


Asunto(s)
Humanos , Masculino , Femenino , Adulto , Anciano , Anciano de 80 o más Años , Ablación por Catéter/métodos , Enfermedades Renales Quísticas/cirugía , Enfermedades Renales Quísticas/patología , Complicaciones Posoperatorias , Biopsia , Imagen por Resonancia Magnética , Tomografía Computarizada por Rayos X , Estudios de Factibilidad , Reproducibilidad de los Resultados , Estudios Retrospectivos , Factores de Riesgo , Resultado del Tratamiento , Cirugía Asistida por Computador/métodos , Enfermedades Renales Quísticas/diagnóstico por imagen , Neoplasias Renales/cirugía , Persona de Mediana Edad
5.
Radiol. bras ; 48(4): 249-259, July-Aug. 2015. ilus
Artículo en Inglés | LILACS | ID: lil-759410

RESUMEN

AbstractMagnetic resonance imaging is a method with high contrast resolution widely used in the assessment of pelvic gynecological diseases. However, the potential of such method to diagnose vaginal lesions is still underestimated, probably due to the scarce literature approaching the theme, the poor familiarity of radiologists with vaginal diseases, some of them relatively rare, and to the many peculiarities involved in the assessment of the vagina. Thus, the authors illustrate the role of magnetic resonance imaging in the evaluation of vaginal diseases and the main relevant findings to be considered in the clinical decision making process.


ResumoA ressonância magnética é um método com alta resolução de contraste e por isso muito utilizada na avaliação de doenças ginecológicas pélvicas. No entanto, seu potencial para diagnóstico de lesões vaginais ainda é subestimado, provavelmente em razão da escassa literatura referente ao tema, da pouca familiaridade dos radiologistas com doenças vaginais, algumas delas relativamente raras, e das muitas peculiaridades em um exame para avaliação desta víscera oca. Desta forma, ilustraremos neste estudo o papel da ressonância magnética na avaliação das doenças vaginais e os principais achados relevantes para a conduta clínica.

6.
Radiol. bras ; 41(2): 139-140, mar.-abr. 2008. ilus
Artículo en Portugués | LILACS | ID: lil-483002

RESUMEN

Sarcoma de Kaposi é uma neoplasia associada a condições de imunossupressão que acomete os vasos linfáticos e sanguíneos. É a neoplasia intra-hepática mais comum na síndrome da imunodeficiência adquirida. A tomografia computadorizada e a ressonância magnética revelam múltiplos pequenos nódulos, proeminência e realce dos planos periportais, devido à presença de tecido neoplásico. Os autores descrevem um caso de paciente masculino, de 47 anos de idade, com síndrome da imunodeficiência adquirida e sarcoma de Kaposi disseminado.


Kaposi sarcoma is a neoplasm associated with immunosuppressive conditions, and involving blood and lymphatic vessels. It is the most frequent intrahepatic neoplasm in patients with acquired immunodeficiency syndrome. Computed tomography and magnetic resonance imaging demonstrate multiple small nodules, prominence and contrast-enhancement of periportal branches due to the presence of the neoplastic tissue. The authors report a case of a 47-year-old male patient with acquired immunodeficiency syndrome presenting disseminated Kaposi sarcoma.


Asunto(s)
Humanos , Masculino , Persona de Mediana Edad , Neoplasias de los Conductos Biliares , Sarcoma de Kaposi/diagnóstico , Síndrome de Inmunodeficiencia Adquirida/diagnóstico , Síndrome de Inmunodeficiencia Adquirida/fisiopatología , Hepatopatías , Imagen por Resonancia Magnética , Tomografía Computarizada por Rayos X
7.
Radiol. bras ; 41(1): 55-62, jan.-fev. 2008. ilus
Artículo en Inglés, Portugués | LILACS | ID: lil-477725

RESUMEN

A ressonância magnética é ferramenta importante para a detecção e caracterização dos tumores adrenais. O conhecimento das diferentes apresentações dos tumores primários e secundários à ressonância magnética e sua correlação com dados da histologia são essenciais para o correto raciocínio diagnóstico. Este artigo revisa os aspectos que podem estreitar o diagnóstico diferencial dos tumores adrenais, dando ênfase à correlação histológica daqueles mais comuns.


Magnetic resonance imaging is an important tool for the detection and characterization of adrenal tumors. The knowledge about the different presentations of primary and secondary adrenal tumors at magnetic resonance imaging and their correlation with histological data are essential for the establishment of a correct diagnosis. The present study reviews magnetic resonance imaging aspects which may narrow the differential diagnosis of adrenal tumors, emphasizing the histological correlation of the most frequent ones.


Asunto(s)
Glándulas Suprarrenales , Neoplasias Retroperitoneales/radioterapia , Neoplasias Urogenitales/diagnóstico , Neoplasias Urogenitales/radioterapia , Diagnóstico por Imagen , Imagen por Resonancia Magnética
8.
Radiol. bras ; 40(4): 279-282, jul.-ago. 2007. ilus
Artículo en Portugués | LILACS | ID: lil-462383

RESUMEN

Laringoceles são lesões relativamente raras definidas como dilatações anômalas dos sáculos dos ventrículos laríngeos. A classificação usual divide a laringocele em interna, externa e combinada ou mista. Laringoceles internas são as que se localizam medialmente à cartilagem tireóidea e geralmente causam compressão nas bandas ventriculares levando a rouquidão e sintomas compressivos na via aérea. As externas se estendem através da membrana tireóidea, apresentando-se como massas cervicais, e as mistas são as que ocupam as duas regiões, podendo causar ambos os sintomas. O diagnóstico é geralmente feito por tomografia computadorizada e/ou laringoscopia. Apresentamos um caso de laringocele mista em que o diagnóstico foi sugerido no exame de ultra-sonografia, num paciente encaminhado com história de massa cervical.


Laryngoceles are fairly unusual diseases defined as anomalous saccular dilatation of the laryngeal ventricles. The usual classification divides laryngoceles into internal, external and mixed types. Internal laryngoceles are those located medially to the thyrohyoid membrane and usually compress the false vocal cords causing hoarseness or airway obstructive symptoms. External laryngoceles extend through the thyrohyoid membrane, presenting as cervical masses; and mixed laryngoceles present both the internal and external components with their respective symptoms. Diagnosis is usually defined by computed tomography and/or laryngoscopy. This is a report of a case of mixed laryngocele diagnosed by ultrasonography in a patient referred for investigation with a history of palpable cervical mass.


Asunto(s)
Humanos , Masculino , Persona de Mediana Edad , Enfermedades de la Laringe , Enfermedades de la Laringe , Mucosa Laríngea/lesiones , Laringoscopía
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA