Biomedical subjects
Publications and source records attributed to R S Feinstein.
Film fog is a common cause of x-ray film artifact. The authors report an unusual source of film fogging in the darkroom--seen in three consecutive radiographs of two different patients--the exposure of film to the low light emission of a fluorescent commercial adhesive bandage worn by the technologist. Heightened awareness of the effects of these bandages will help avoid creation of this film fog artifact.
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The computed tomographic (CT) findings in five adult patients with neuroblastoma and in one with ganglioneuroblastoma are presented. Four patients had abdominal and thoracic disease, one had abdominal disease only, and one had isolated chest involvement. The CT findings are nonspecific and may be confused with lymphoma. Nevertheless, multifocal presentation, particularly if it includes the posterior mediastinum and association with diffuse or focal bone involvement, when present, should suggest the diagnosis and lead to appropriate laboratory and histopathologic workup.
Characteristic computed tomographic findings of entero-enteric intussusception were demonstrated with in vitro studies of surgically created intussusceptions in canine small bowel. The signs were effective in detecting intussusception in two patients, one with metastatic melanoma and a second with a plasmacytoma, both of whom had previously nondiagnostic standard oral contrast medium examinations. The findings consist of a dilated loop of bowel (the intussuscipiens) with a thickened wall, within which is an eccentric soft tissue mass (the intussusceptum) and an adjacent crescentic low density mass on the mesenteric side, representing the invaginated mesentery.
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We evaluated 4 patients with surgically proved retroperitoneal fibrosis by computerized tomography and ultrasound. Retroperitoneal fibrosis was diagnosed correctly in all 4 patients by computerized tomography but was detected by ultrasound in only 1. On computerized tomography, retroperitoneal fibrosis demonstrated a characteristic soft tissue mass enveloping the abdominal aorta, inferior vena cava and ureters. Computerized tomography was capable of detecting the abnormality with greater reliability than ultrasound, and was far superior in delineating the extent of the process and its relation to adjacent abdominal structures. Computerized tomography is the method of choice in the preoperative evaluation evaluation of retroperitoneal fibrosis. It also is anticipated that computerized tomography will prove equally useful in the postoperative followup of this disease.