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Article: Research on neoplasms detailed by K.C. Grim and co-authors.
- Article from:
- Cancer Weekly
- Article date:
- September 1, 2009
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"Abnormal growths were observed on the lips and in the oral cavities of 2- and 3-year-old Chinook salmon (Oncorhynchus tshawytscha) maintained in one freshwater and one saltwater captive fish-rearing facility in the Columbia River (Pacific Northwest). Initially presenting as bilaterally symmetrical, red, irregular plaques on oral mucosal surfaces, the lesions developed progressively into large, disfiguring masses," scientists writing in the journal Veterinary Pathology report (see also Neoplasms).
"Of the 502 natural parr collected for captive broodstock, 432 (86%) displayed these tumors, whereas cohort salmon (i.e., same year classes) in these same facilities ...