title: Carcinogenicity bioassay of 4-chloromethylbiphenyl (4CMB), 4-hydroxymethylbiphenyl (4HMB) and benzyl chloride (BC) on mouse skin: interim (7 month) report.
abstract: 4CMB, 4HMB, BC of benzo[a]pyrene (BP, positive control) dissolved in toluene have been applied twice weekly to the shaved dorsal region of groups of 20 Alderley Park Swiss albino mice. After 7 months of treatment, 6/20 of the BP test group were confirmed as having developed squamous cell carcinoma of the skin. However, none of the animals in the test groups appeared to have been affected by the test chemicals. This interim observation was supplemented by intercurrent sacrifice of 1 animal from each of the test groups, followed by histopathological examination of sections of the subcutaneous tissue. No neoplastic changes were discerned.
mesh_terms: D000818:Animals; D001564:Benzo(a)pyrene; D001580:Benzopyrenes; D001593:Benzyl Compounds; D001713:Biphenyl Compounds; D002273:Carcinogens; D004353:Drug Evaluation, Preclinical / Q000379:methods; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009374:Neoplasms, Experimental / Q000139:chemically induced; D012878:Skin Neoplasms / Q000139:chemically induced*
chemical_list: D001580:Benzopyrenes; D001593:Benzyl Compounds; D001713:Biphenyl Compounds; D002273:Carcinogens; D001564:Benzo(a)pyrene; C033488:4-hydroxymethylbiphenyl; C033487:4-chloromethylbiphenyl; C021292:benzyl chloride