Theodore Robinson

Renal pelvic carcinoma. An angiographic re-evaluation.

A series of 22 cases of renal pelvic carcinoma were reviewed in an attempt to find characteristics which would distinguish this entity from hypernephroma which it closely resembles. Distinctive angiographic characteristics are enlarged pelviureteric artery, fine neovascularity, vascular encasement, and absence of arteriovenous shunting. Since ureteronephrectomy is the preferred treatment for renal pelvic carcinoma, the importance of differentiating this tumor from other renal lesions is strongly stressed.

Colitis cystica profunda, an unusual solitary tumor: Report of three cases.

SummaryColitis cystica profunda manifests as a nodular or polypoid defect, either localized or diffuse, on barium enema examination. Differentiation from a neoplasm by histologic examination is necessary, as the lesion may resemble a mucoid carcinoma.

On the Evaluation of Medical Students in Radiology

What a medical student has learned in radiology needs to be evaluated, not only to appraise the students mastery of the subject but to determine the efficiency of teaching methods. A two-phase written/oral test for all students completing the fourth-year elective is described.

Renal failure induced by contrast material

Transitory and occasionally irreversible renal failure secondary to parenterally administered iodinated contrast material is now well documented. Diabetes and pre-existing renal insufficiency are the two most important risk factors. Intravascular contrast examinations should be avoided whenever possible in high-risk patients, particularly diabetics with creatinine levels of 5 dl./ml. or higher. Alternative methods for the etiologic evaluation of renal failure or hematuria are suggested.

Sarcoidosis and mediastinal emphysema.

Mediastinal emphysema developed in a 13-year-old boy with diffuse interstitial pulmonary disease, later proved to be sarcoid. No previous report was found.

Teaching the Use of Diagnostic Radiology and other Imaging Modalities: An Exercise Designed for Fourth-Year Medical Students

An exercise was devised for fourth-year medical students to teach the use of diagnostic imaging modalities. A round-table discussion of four to six patient summaries is led by staff radiologists and/or other clinicians. The formation of clear flow-chart plans of work-up with logical decision points is the purpose of the exercise. It appears to be an effective method.

Abdominal Angiography: Acid-Base Balance

Abstract Following rapid injection of contrast material, acid-base studies in patients with normal and impaired renal function showed only minimal changes. Alterations in serum osmolality and hematocrit levels were seen but deemed insignificant.