Biomedical subjects
Publications and source records attributed to C R Larsen.
A patient with renal cell carcinoma extending into the inferior vena cava presented to our institution. Magnetic resonance imaging demonstrated the superior extent of the thrombus to be at the level of the hepatic veins. Preoperative venacavography showed extension into the right atrium. The need for both studies in evaluating patients with Stage 3A disease is reviewed.
The cases of 3 patients with giant intestinal pseudopolyposis are presented. Giant pseudopolyposis complicated chronic ulcerative colitis in 2 patients and granulomatous colitis in 1 patient. Each patient was evaluated with either barium or Gastrografin enema as well as with computed tomography (CT) after administration of oral contrast material. The unique manifestations of this unusual lesion as demonstrated by computed tomography are described.
A case is presented of xanthogranulomatous cholecystitis that resembled carcinoma of the gallbladder on computed tomography. The large, infiltrating mass satisfied the criteria for massive carcinoma of the gallbladder.
The Gouda stereotactic frame has been redesigned for use with computed tomography. The patient is attached to the frame, is scanned, and is moved to the operating room for stereotactic biopsy. The Gouda frame permits accurate biopsy of otherwise inaccessible tumors of the brain.
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The clinical diagnosis of renal infarction can be difficult to make and the computerized tomographic appearance can be misleading at times. The different computerized tomographic images can be explained angiographically by the arrangement of the vascular planes of the kidney and by the particular branches that are occluded. We report 2 cases with different angiographic and computerized tomographic appearance to document this correlation.
We report a case of congenital intrathoracic kidney, a rare developmental anomaly, which may present as an asymptomatic posterior mediastinal mass. The evaluation of such lesions can be performed expeditiously with computed tomography and obviate the need for any further clinical studies or operation.
A computed tomographic evaluation of adult ileocolic intussusception secondary to polypoid adenocarcinoma is presented. The observed tapering homogeneous peripheral mantle and mixed density core may be characteristic for this entity.
The Gouda stereotactic frame has been modified to interface with the GE 8800 scanner. The patient, attached to the frame, is scanned and then moved to the operating room for a stereotactic biopsy. This is a safe, accurate method of obtaining biopsy specimens of otherwise inaccessible tumors of the brain.
Obstruction of the afferent loop may develop in patients who have had a Billroth type II gastrojejunostomy. This obstructed loop has a characteristic but initially confusing computed tomographic appearance that might be mistaken for multiple peripancreatic cystic masses. Three cases of afferent loop obstruction due to gastric carcinoma are reported. In each case, the length of the jejunal segment incorporated into the afferent loop determined the number of cystic masses evident at each scan level. Recognition of the typical anatomic configuration and uniform size of these cystic masses is key to the correct diagnosis.
Sarcoid involvement of the larynx is a rare but potentially life-threatening complication of systemic sarcoidosis. A classic, clinical, radiologic, and pathologic case is presented.
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Two cases of choledochocele are presented and 14 cases in the literature reviewed. Choledochocele is defined as a herniation of the common bile duct into the duodenum. This entity is distinguishable radiographically from duodenal diverticulum and duodenal duplication cyst by filling during cholangiography but not during upper gastrointestinal series. The duodenal diverticulum fills on upper gastrointestinal series but not on cholangiography. The duplication cyst will not fill with either method.
Spigelian hernia is an uncommon hernia of the anterior abdominal wall. Because of its insidious nature and at times nonspecific physical findings associated with it, the diagnosis of this hernia is often not made. Typically, the hernial orifice is small, and strangulation of the contents of the hernial sac can occur. Computed tomography permits the distinction between spigelian hernia and other anterior abdominal wall or intra-abdominal masses. When a spigelian hernia is found, CT is useful in establishing contents of the hernial sac and defects in the fascial plane.
Penetration of the spleen by an adenocarcinoma of the stomach is described in a patient undergoing chemotherapy. The diagnosis was made by computed tomography.
Acute pyelonephritis developed in a 67-yr-old man after transrectal ultrasonographically guided biopsy of the prostate. The clinical presentation and results of excretory urography were nondiagnostic. Diagnosis was made by computed tomography, which was delayed 12 h after i.v. administration of contrast medium.
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