TY - JOUR
T1 - Histopathology of neoplastic and nonneoplastic hepatic lesions in mice fed diets containing tetrachlorvinphos
AU - Ward, J. M.
AU - Bernal, E.
AU - Buratto, B.
AU - Goodman, D. G.
AU - Strandberg, J. D.
AU - Schueler, R.
N1 - Funding Information:
I Received July 18, 1978; accepted December 18, 1978. 2 Supported in part by Public Health Service contracts NOICP43350 (to Tracor Jitco, Inc.) and NOl-CP43288 (to The Johns Hopkins University) from the Division of Cancer Cause and Prevention, National Cancer Institute. 3 Tumor Pathology Branch, Rm. 402, Del Ray Bldg., Carcinogenesis Testing Program, Division of Cancer Cause and Prevention, National Cancer Institute, National Institutes of Health, Public Health Service, U.S. Department of Health, Education. and Welfare, Bethesda, ~d. 20014. 4 Gulf South Research Institute, New Iberia, La. 70560. 5 Present address: Clement Associates, Inc., Washington, D.C. 20007. 6 Department of Pathology, School of ~edicine, The Johns Hopkins University, Baltimore, ~d. 21205. 7 Tracor Jitco, Inc., Rockville, ~d. 20852. 8 We thank Robert Nye, Joan O'Brien, Jean Keller, Amelia Grant, Jay Fortner, Barbara Coolidge, and William Boucher for excellent help.
PY - 1979/7
Y1 - 1979/7
N2 - Tetrachlorvinphos was fed at 8, 000 or 16, 000 ppm in diets to male and female (C57BL/6N × C3H/HeN)F1, mice for 80 weeks. Surviving mice were killed at 92 weeks, and all mice were completely necropsied. A high incidence of unusual nonneoplastic hepatic lesions in treated mice was present and characterized by pericellular fibrosis, hepatocyte nuclear pleomorphism, and intrasinusoidal foci of macrophages with intracytoplasmic crystalline structures. From 84 to 94% of the treated male mice and from 21 to 23% of the treated females had hepatocellular neoplasms. Only 17% of the control males and 7% of the control females had liver tumors. The induced tumors were frequently multiple In the liver, whereas the tumors In the controls were usually singular. The morphology of 241 liver tumors in 110 treated mice was different from that of tumors in controls. Liver tumors in control mice were generally composed of small basophilic hepatocytes. In treated mice, tumors were hepatocellular carcinomas composed of solid sheets of large basophilic or eosinophilic hepatocytes. Foci of prominent trabecular formation were seen in 51 tumors. Fifteen tumors were composed of small basophilic hepatocytes with oval cells Interposed among them. Foci of capillary formation were noted in 3 of these tumors. In addition, 7 more typical hemangiosarcomas forming sinusoids and with thrombosis were observed.—JNCI 63: 111–118, 1979.
AB - Tetrachlorvinphos was fed at 8, 000 or 16, 000 ppm in diets to male and female (C57BL/6N × C3H/HeN)F1, mice for 80 weeks. Surviving mice were killed at 92 weeks, and all mice were completely necropsied. A high incidence of unusual nonneoplastic hepatic lesions in treated mice was present and characterized by pericellular fibrosis, hepatocyte nuclear pleomorphism, and intrasinusoidal foci of macrophages with intracytoplasmic crystalline structures. From 84 to 94% of the treated male mice and from 21 to 23% of the treated females had hepatocellular neoplasms. Only 17% of the control males and 7% of the control females had liver tumors. The induced tumors were frequently multiple In the liver, whereas the tumors In the controls were usually singular. The morphology of 241 liver tumors in 110 treated mice was different from that of tumors in controls. Liver tumors in control mice were generally composed of small basophilic hepatocytes. In treated mice, tumors were hepatocellular carcinomas composed of solid sheets of large basophilic or eosinophilic hepatocytes. Foci of prominent trabecular formation were seen in 51 tumors. Fifteen tumors were composed of small basophilic hepatocytes with oval cells Interposed among them. Foci of capillary formation were noted in 3 of these tumors. In addition, 7 more typical hemangiosarcomas forming sinusoids and with thrombosis were observed.—JNCI 63: 111–118, 1979.
UR - http://www.scopus.com/inward/record.url?scp=0018749004&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0018749004&partnerID=8YFLogxK
U2 - 10.1093/jnci/63.1.111
DO - 10.1093/jnci/63.1.111
M3 - Article
C2 - 286822
AN - SCOPUS:0018749004
SN - 0027-8874
VL - 63
SP - 111
JO - Journal of the National Cancer Institute
JF - Journal of the National Cancer Institute
IS - 1
ER -