title: Pathology of tumors developed in guinea pigs given intraperitoneal injections of N-methyl-N-nitrosourea.
abstract: The carcinogenic effects of N-methyl-N-nitrosourea after repeated intraperitoneal administration in inbred strain NIH 13 guinea pigs were studied. 50% of the animals that survived beyond 22 weeks, after intraperitoneal injection of MNU at a dose of 10 mg/kg body weight/week for 18 weeks, developed a broad spectrum of tumors: these included adenocarcinoma of pancreas in 2 animals, fibrosarcoma of the mesentery in 2 animals, angiosarcoma of mesentery in 2 animals, mesothelioma of the peritoneum in 1 animal and tumors of small intestine in 3 animals. These studies indicate the susceptibility of different types of tissue to the local effects of MNU after intraperitoneal administration.
mesh_terms: D000230:Adenocarcinoma / Q000139:chemically induced; D000818:Animals; D005354:Fibrosarcoma / Q000139:chemically induced; D006168:Guinea Pigs; D006394:Hemangiosarcoma / Q000139:chemically induced; D007274:Injections, Intraperitoneal; D007414:Intestinal Neoplasms / Q000139:chemically induced; D008297:Male; D008643:Mesentery; D008770:Methylnitrosourea / Q000008:administration & dosage; D009374:Neoplasms, Experimental / Q000139:chemically induced* / Q000473:pathology; D009607:Nitrosourea Compounds / Q000008:administration & dosage; D010190:Pancreatic Neoplasms / Q000139:chemically induced
chemical_list: D009607:Nitrosourea Compounds; D008770:Methylnitrosourea