Malignant lymphomas of different histological types in the northern pike (Esox lucius) from the eastern part of the Baltic Sea

Immunohistochemical characterization of malignant lymphoma in northern pike, Esox lucius L., from Estonian Baltic waters

“…A positive staining of histiocytes for lipids by Sudan III-IV was observed (Bogovski 1988a) in the same pike lymphoma specimens which reacted positively for LYS, ACT and S-100 in the present study. This finding, suggesting phagocytosis, is additional evidence that the positively stained cells in both studies are related to histiocytes.…”

“…A previous study showed that the cells of these two tumours were highly pleomorphic and very irregular in size and shape, sometimes with bizarre nuclei (Bogovski 1988a). Multinucleated giant eells of up to 25-30jum in diameter were eommonly seen.…”

“…1). Details of fish measurements, sex, and the gross and microscopic appearance of the tumours found have been presented previously (Bogovski 1988a).…”

“…These neoplasma have been found in the northern pike, Esox lucius L., and in the muskellunge, E, masquinongi Mitchill, in North America (Sonstegard 1975(Sonstegard , 1976aBrown, Hazdra, Keith, Greenspan, Kwapinski & Beamer 1973), and in the northern pike in Ireland (Mulcahy 1963(Mulcahy , 1976 and in the Baltic Sea (Ljungberg & Lange 1968;Ljungberg 1976;Thompson 1982;Bogovski 1988a,b). The gross appearance of the predominantly multiple tumoural nodules in Estonian pike from the Baltic Sea has been described previously (Bogovski 1988a). The tumour prevalence varied from 1 to 6% in both sporting and commercial catches (Bogovski 1988a).…”

“…The gross appearance of the predominantly multiple tumoural nodules in Estonian pike from the Baltic Sea has been described previously (Bogovski 1988a). The tumour prevalence varied from 1 to 6% in both sporting and commercial catches (Bogovski 1988a).…”