RESUMEN
The polysplenia syndrome is the association of multiple spleens, situs inversus, congenital heart disease, and azygous continuation of the inferior vena cava. Magnetic resonance (MR) is a noninvasive imaging modality which can easily confirm the multiplicity of spleens, situs inversus, and identify complex congenital cardiovascular malformations. The anomalies of the polysplenia syndrome as imaged by MR are presented.
Asunto(s)
Anomalías Múltiples/diagnóstico , Imagen por Resonancia Magnética , Bazo/anomalías , Adolescente , Femenino , Cardiopatías Congénitas/diagnóstico , Humanos , Situs Inversus/diagnóstico , Síndrome , Vena Cava Inferior/anomalíasAsunto(s)
Enfermedades de la Mama/diagnóstico por imagen , Edema/diagnóstico por imagen , Enfermedades de la Mama/etiología , Neoplasias de la Mama/diagnóstico , Diagnóstico Diferencial , Edema/etiología , Femenino , Humanos , Persona de Mediana Edad , Síndrome de la Vena Cava Superior/diagnóstico , XeromamografíaRESUMEN
Two cases of apparent unilateral renal obstruction in which lesser contralateral obstructions were not seen are presented. In both cases, relief of the more severe obstruction resulted in an unmasking of the milder contralateral lesion.
Asunto(s)
Compuestos Organometálicos , Ácido Pentético , Obstrucción Ureteral/diagnóstico por imagen , Adulto , Cistitis/complicaciones , Furosemida , Humanos , Masculino , Cintigrafía , Pentetato de Tecnecio Tc 99m , Obstrucción Ureteral/congénito , Obstrucción Ureteral/etiologíaRESUMEN
Herniation of lung through the chest wall is uncommon and previously reported cases have been found either clinically or by chest radiography. We recently discovered a case of herniated lung on screening xeromammography. These findings were correlated with thoracic CT.
Asunto(s)
Enfermedades Pulmonares/diagnóstico por imagen , Mamografía , Tomografía Computarizada por Rayos X , Xeromamografía , Femenino , Hernia/diagnóstico por imagen , Humanos , Persona de Mediana EdadRESUMEN
Five hundred supine abdominal CT scans were reviewed retrospectively to determine the variation of colonic position about each kidney. The anteroposterior position of the retroperitoneal colon was evaluated for different age groups and sexes at the level of the upper-, mid-, and lower-renal poles. The ascending/descending colon generally assumed a more posterior position about the lower poles and left kidney vs. the upper poles and right kidney. There were few significant differences between the sexes and among different age groups with two exceptions. In middle-aged and older women, the descending colon lay more lateral to the left lower kidney than in their male counterparts. Second, although the colon was located behind the kidney (retrorenal colon), in a nearly equal number of men and women, most patients with this colonic position were 60 years of age or older and had it about their lower renal poles. The overall frequency of retrorenal colon in the supine patient was 1.9%.
Asunto(s)
Colon/anatomía & histología , Riñón/anatomía & histología , Adolescente , Adulto , Factores de Edad , Niño , Fascia/anatomía & histología , Femenino , Variación Genética , Humanos , Masculino , Persona de Mediana Edad , Espacio Retroperitoneal , Factores Sexuales , Tomografía Computarizada por Rayos XRESUMEN
Ninety patients underwent computed tomographic scanning in both the supine and prone positions to show the orientation of the retroperitoneal colon about the kidneys and allow evaluation of changes in colonic position and contents. The data were compared with data on 500 patients scanned only when supine. Particular attention was given to bowel found posterior to the kidneys (retrorenal colon): its frequency of occurrence on 500 scans of supine patients was 1.9%, but 10.0% in the 90 prone patients. Because most invasive renal procedures would not intersect with retrorenal colon located behind the lateral one-third of the kidney, the data were reevaluated after deletion of these patients, giving a frequency in prone patients of 4.7%. This was found exclusively at the level of the lower renal poles, and the involved colon was extensively distended with gas. Attention should be given at fluoroscopy to detect this unusual, posteriorly positioned, air-filled colon before any invasive renal procedure.
Asunto(s)
Colon/diagnóstico por imagen , Riñón/diagnóstico por imagen , Espacio Retroperitoneal/diagnóstico por imagen , Tomografía Computarizada por Rayos X , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , PosturaRESUMEN
The mechanisms of prolonged renal cortical tracer retention in Tc-99m DTPA scintigraphy are discussed and a variety of examples are presented.
Asunto(s)
Corteza Renal/diagnóstico por imagen , Enfermedades Renales/diagnóstico por imagen , Compuestos Organometálicos , Ácido Pentético , Tecnecio , Adolescente , Adulto , Diagnóstico Diferencial , Humanos , Corteza Renal/metabolismo , Enfermedades Renales/fisiopatología , Masculino , Persona de Mediana Edad , Compuestos Organometálicos/metabolismo , Ácido Pentético/metabolismo , Cintigrafía , Circulación Renal , Tecnecio/metabolismo , Pentetato de Tecnecio Tc 99m , Factores de Tiempo , Tomografía Computarizada por Rayos XRESUMEN
A renopleural fistula was detected on a Tc-99m DTPA renal study during evaluation for possible post-traumatic urinoma.
Asunto(s)
Fístula/diagnóstico por imagen , Enfermedades Renales/diagnóstico por imagen , Enfermedades Pleurales/diagnóstico por imagen , Fístula Urinaria/diagnóstico por imagen , Heridas y Lesiones/complicaciones , Adulto , Fístula/etiología , Humanos , Enfermedades Renales/etiología , Masculino , Enfermedades Pleurales/etiología , Cintigrafía , Fístula Urinaria/etiologíaAsunto(s)
Malformaciones Arteriovenosas/terapia , Embolización Terapéutica , Etanol/administración & dosificación , Arteria Femoral/anomalías , Adulto , Angiografía , Malformaciones Arteriovenosas/cirugía , Nalgas/irrigación sanguínea , Etanol/uso terapéutico , Arteria Femoral/cirugía , Estudios de Seguimiento , Humanos , Claudicación Intermitente/terapia , Masculino , Punciones , Muslo/irrigación sanguíneaAsunto(s)
Rotura de la Aorta/diagnóstico por imagen , Anciano , Aorta Abdominal , Niño , Femenino , Humanos , Masculino , Persona de Mediana Edad , Radiografía , Espacio RetroperitonealRESUMEN
The Poland-Möbius syndrome is the combination of two rare congenital disorders and has been reported previously in only 13 patients. We report two additional cases with an evaluation of the findings and possible pathogenesis, and discuss the role of computerized tomography in evaluating the brain, pons, orbits, and facial nerve.
Asunto(s)
Nervio Abducens , Parálisis Facial/congénito , Oftalmoplejía/congénito , Síndrome de Poland/complicaciones , Sindactilia/complicaciones , Tomografía Computarizada por Rayos X , Adulto , Preescolar , Parálisis Facial/complicaciones , Parálisis Facial/diagnóstico por imagen , Humanos , Masculino , Oftalmoplejía/complicaciones , Oftalmoplejía/diagnóstico por imagen , SíndromeRESUMEN
A method has been developed to estimate glomerular filtration rate using computer evaluation of images obtained during routine renal scanning. The technique requires less than 40 minutes of imaging time, requires only a single blood sample, and correlates highly with 24 hour creatinine clearance.
Asunto(s)
Tasa de Filtración Glomerular , Enfermedades Renales/diagnóstico por imagen , Renografía por Radioisótopo/métodos , Adulto , Anciano , Niño , Femenino , Humanos , Masculino , Persona de Mediana Edad , Ácido Pentético , Tecnecio , Pentetato de Tecnecio Tc 99mRESUMEN
High-frequency oscillation (HFO) minimizes tidal volume. To investigate whether ventilation can proceed when tidal movement (volume) is eliminated, a nondistensible physical model of interconnected chambers was constructed. During HFO, ventilation was related to pressure waveform characteristics recorded within the separate chambers. Ventilation increased up to a critical frequency related to the time constant of the system. Beyond this frequency, ventilation dropped off rapidly.