| neoplastic and nonneoplastic hepatic changes in lake whitefish (coregonus clupeaformis) from the st. lawrence river, quebec, canada. | as part of a survey of fish diseases, lake whitefish (coregonus clupeaformis) were collected in fall 1995 from the st. lawrence river 15 km upstream of quebec city, quebec, canada, to assess the prevalence of liver lesions. a total of 141 fish were captured and necropsied, and three standard sections of liver were taken for histological examination. prevalences of altered hepatocyte foci, hepatocellular carcinoma, cholangioma, and cholangiocarcinoma were 0.7%, 2.1%, 0.7%, and 2.1%, respectively. ... | 1998 | 9485481 |
| health of lake whitefish (coregonus clupeaformis) with elevated tissue levels of environmental contaminants. | lake whitefish (coregonus clupeaformis) were collected in 1996 from the st. lawrence river, quebec, canada. histologic examination was performed on major organs of 497 specimens and on the liver of 48 additional individuals. preneoplastic and neoplastic hepatic changes consisted of vacuolated cell (n = 65), clear cell (n = 17), and acidophilic (n = 16) foci of altered hepatocyte, hepatocellular carcinoma (n = 12), cholangioma (n = 5), and cholangiocarcinoma (n = 28). six fish were intersexes (1. ... | 2002 | 11883413 |