RESUMEN
This is a retrospective study of a series of seven patients with pancreatic metastases studied by ultrasonography and computed tomography. They were detected during tumor staging, or in the follow-up period of over 10 years of patients with advanced known malignancy. Lesions were multiple in two patients and solitary in five; solid in six cases and cystic in one. Clinically, four cases were asymptomatic and three cases presented with jaundice or epigastric pain. Ultrasonography and computed tomography findings were non-specific. Consequently it was not possible to differentiate solitary metastases from primary solid adenocarcinoma and cystadenocarcinoma of the pancreas. In these cases, computed tomography- or ultrasonography-guided biopsies had to be performed to obtain histological proof. However, multiple lesions discovered in a patient with a known malignancy can be assumed to be due to metastases.
Asunto(s)
Neoplasias Pancreáticas/secundario , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Páncreas/diagnóstico por imagen , Neoplasias Pancreáticas/diagnóstico por imagen , Estudios Retrospectivos , Tomografía Computarizada por Rayos X , UltrasonografíaRESUMEN
The authors studied the usefulness of MR imaging in the diagnosis of an osteoid osteoma occurring within the C4 left uncinate process. It was detected by scintigraphy and diagnosed by CT. On T2-weighted MR images the nidus showed a very low signal intensity with an increased signal within the adjacent end-plates. This pattern was misleading and more suggestive of degenerative disk disease.
Asunto(s)
Vértebras Cervicales , Imagen por Resonancia Magnética , Osteoma Osteoide/diagnóstico , Neoplasias de la Columna Vertebral/diagnóstico , Adulto , Vértebras Cervicales/diagnóstico por imagen , Humanos , Masculino , Osteoma Osteoide/diagnóstico por imagen , Neoplasias de la Columna Vertebral/diagnóstico por imagen , Tomografía Computarizada por Rayos XRESUMEN
Thirty-three patients with recurrent sciatica after lumbar-disk surgery were studied for recurrent herniated nucleus pulposus (HNP) by CT alone and CT-diskography (CTD). Twenty-six patients underwent surgical reexploration allowing correlation with CTD. CTD made a correct diagnosis of recurrent HNP in twenty-one patients showing an extravasation of the contrast medium from the disk space into the medullary canal. In two cases CTD was positive for recurrent HNP but surgery showed only fibrosis. The amount of contrast leak was very small in these two cases along the posterior common longitudinal ligament, and the junction with the disk was very narrow. Because of their clinical presentation three patients with negative studies were operated upon. One showed only fibrosis and the two others showed an associated disk fragment. Among the twenty-one true-positive cases, seven showed a combination of recurrent HNP and scarring. Contamination of CSF by the contrast medium through the dura was observed in two patients. Although a prospective comparative study between CTD and IV-contrast-enhanced CT is necessary, CTD appears to be a useful diagnostic procedure for recurrent HNP after surgery of the lumbar spine.