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Biomedical subjects

H L Stein

Publications and source records attributed to H L Stein.

At least 37 records · Page 2Linked to original sources
PubMed1978

Computed tomographic evaluation of therapeutically induced changes in primary and secondary brain tumors.

A prospective study was initiated to evaluate computed tomography as a method for monitoring therapeutically induced changes in brain tumors. Early postoperative scans may be misleading in the evaluation of residual tumor because of trauma to the blood-brain barrier during operation. The size of the dominant mass (17/25), enhancement (11/25), edema (11/25), and ventricular distortion (14/25) were decreased in many patients after radiation therapy. Occasional tumors increased in size during radiation therapy (3/25). Enlargement of the lateral ventricles developed in 9 of 25 patients. Computed tomography offers definite advantages over nuclide brain scans, angiography and other diagnostic studies for evaluating therapeutically induced changes in brain tumors.

Brain Neoplasms↗
PubMed1978

The origin of the left gastric artery.

Five hundred celiac angiograms were reviewed to evaluate the frequency of clinically significant variations in the origin of the left gastric artery. In 13 of 500 cases, the left gastric artery arose anomalously most often as a direct branch of the aorta; in 14 of 500 cases, the left gastric artery primarily supplied the liver with only minor contributions to the stomach. An aberrant origin of the left gastric artery necessarily influences the angiographic diagnosis and therapy of gastrointestinal hemorrhage.

Angiography↗
PubMed1977

Angiographic patterns of posttraumatic renal scarring.

Evaluation of 19 patients with a history of renal trauma revealed three angiographic features helper in the diagnosis of posttraumatic renal scarring: (1) a cup-shaped renal contour defect characterized by smooth margins, infolding of the renal cortex, and extension of the calyces to the edge of the defect; (2) occlusion of an extra- or intrarenal artery associated with a distal avascular zone of infarction; and (3) a grossly heterogeneous nephrogram characterized by scattered islands of renal tissue separated by broad or narrow avascular scars. Limited pathologic correlation suggests that the cup-shaped contour defect reflects subcapsular hemorrhage and that the mottled, heterogeneous nephrogram reflects a shattered kidney.

Adult↗
PubMed1977

Benign pneumoperitoneum after fiberoptic colonoscopy. A prospective study of 100 patients.

A prospective study of 100 consecutive unselected patients undergoing both diagnostic and therapeutic firoptic colonoscopy was undertaken. Our incidence of colonic perforation is 1%, which is similar to the incidence reported in the literature. This study suggests that even when immediate postcolonoscopic supine and erect abdominal radiographs as well as pre- and postcolonoscopic total blood counts and enzyme levels to supplement clinical impressions are obtained, the incidence of perforation of the colon after fiberoptic colonoscopy is low and not any higher than that reported in the literature. Pneumoperitoneum may occur after fiberoptic colonoscopy with minimal or no clinical evidence suggesting perforation. Perforation in some patients may be treated conservatively without the need of emergency laparotomy.

Adult↗
PubMed1975

The cervical aortic arch anomaly.

Although the cervical aortic arch anomaly occurs rarely, it should always be considered in the differential diagnosis of pulsatile masses in the neck. The eighteenth case of this anomaly is presented herein. Review of the previous literature demonstrates the consistent pattern of branching anomalies associated with the cervical aortic arch and indicates the complex nature of this anomaly. Studies of these patients in biplane (frontal and lateral), as well as the right posterior oblique projection in order to precisely define the order of branching, is recommended, particularly when surgical intervention is indicated.

Aorta, Thoracic↗