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Biomedical subjects

G N Bender

Publications and source records attributed to G N Bender.

23 records · Page 2Linked to original sources
PubMed1993

Colonic pseudo-obstruction: decompression with a tricomponent coaxial system under fluoroscopic guidance.

A tricomponent coaxial system (TAS) suitable for colonic decompression with fluoroscopic guidance is described. The TAS was successfully used in four of four patients, two with acute pseudo-obstruction, one with sigmoid volvulus, and one with recurrent colonic pseudo-obstruction. All patients had acute abdominal distention with cecal diameter of at least 12 cm, and nonsurgical management was unsuccessful. Complete colonic decompression was observed in all four patients, with no recurrence in three of three patients after removal of the decompression catheter. The decompression catheter was left in place in one patient for her comfort until she died of hepatic failure 4 days later. There was no associated colonic bleeding or perforation in any of the four cases. The procedure lasted approximately 20-90 minutes. The TAS promises to be a useful and inexpensive tool with which to perform colonic decompression in selected patients.

Adolescent↗
PubMed1989

The radiographic preauricular groove: its non-relationship to past parity.

Deep preauricular sulci were identified on abdominal radiographs in 29 of 190 (15%) adult females and in none of 110 adult males. To assess the value of the deep preauricular sulcus as an index of past pregnancy, we examined gravidity and parity records of 190 women, using standard films that included the sacroiliac region. Deep, radiographic preauricular grooves were identified in 4 of 41 (10%) nulliparous women and in 25 of 149 (17%) women with positive pregnancy histories. We also examined radiographs obtained before and after pregnancy in six primigravidas. No evidence of radiographic changes in the preauricular grooves was seen in any of the six women. We conclude that the presence of a deep, radiographic preauricular sulcus is not necessarily an indication of past pregnancy.

Adult↗
PubMedDate not supplied

Fibrolamellar carcinoma of the liver: radiologic-pathologic correlation.

Fibrolamellar carcinoma is a malignant hepatocellular tumor with distinct clinical and pathologic differences from hepatocellular carcinoma. It differs from hepatocellular carcinoma in demographics, condition of the affected liver, tumor markers, and prognosis. Fibrolamellar carcinoma characteristically manifests as a large hepatic mass in adolescents or young adults (without gender predominance). Cirrhosis; elevated alpha-fetoprotein levels; and typical risk factors for hepatocellular carcinoma such as viral hepatitis, alcohol abuse, and metabolic disease are typically absent. Fibrolamellar carcinoma is characterized pathologically by cords of tumor cells surrounded by abundant collagenous fibrous tissue arranged in a parallel or lamellar distribution. Fibrotic lamellae often coalesce to form a central scar. Fibrolamellar carcinoma characteristically appears on radiologic images as a lobulated heterogeneous mass with a central scar in an otherwise normal liver. Radiologic evidence of cirrhosis, vascular invasion, or multifocal disease--findings typical of hepatocellular carcinoma--is uncommon in fibrolamellar carcinoma. Imaging features of fibrolamellar carcinoma overlap with those of other scar-producing lesions including focal nodular hyperplasia (FNH), hepatocellular adenoma and carcinoma, hemangioma, metastases, and cholangiocarcinoma. FNH, in particular, may simulate fibrolamellar carcinoma, since both have similar demographic and clinical characteristics. Because some believe that radiologic diagnosis of FNH is possible, it is important to understand the imaging appearance of fibrolamellar carcinoma to avoid misdiagnosing this malignant tumor as a FNH.

Biopsy↗