PMID: 3409185Sep 15, 1988Paper

Exocrine pancreatic function following intraoperative irradiation of the canine pancreas

F Ahmadu-SukaC E Whiteman


Twenty-four beagles received intraoperative irradiation (IORT) with 6 meV electrons to the pancreas and the duodenum. Intraoperative irradiation doses of 17.5 to 40 Gy were given. Billroth II gastrojejunostomy was done to bypass the irradiated duodenum. Six control dogs received only the Billroth II surgery. Two weeks postoperatively, irradiated dogs were given 50 Gy of 6 MV X radiation (external-beam radiation [EBRT]) to the pancreas and duodenum in 2 Gy fractions over a 5-week period. Dogs were monitored clinically and exocrine pancreatic function was evaluated using an N-benzoyl-l-tyrosyl-para-aminobenzoic acid (BT-PABA) test between 3 and 135 days postoperatively. Necropsies were performed on the dogs at 135 days postoperatively. The degree of gross pancreatic atrophy in the irradiated group was dose related. The mean percentage of normal acinar cells correlated with IORT doses and para-aminobenzoic acid (PABA) values (P less than 0.1). Weight loss was significantly greater in the irradiated dogs compared to the control (P less than 0.05) and the mean percentage of body weight loss correlated with the mean PABA values (P less than 0.01). In this study, the use of the BT-PABA test to evaluate progressive exocrine pancreatic ...Continue Reading


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