title: Hyperplastic growth of mucous cells in the mantle of the mussel Modiolus kurilensis from a heavily polluted area of Amursky Bay, Sea of Japan.
abstract: This histology of an external mantle growth in 1 of 500 Modiolus kurilensis from a heavily polluted area of Amursky Bay, Sea of Japan, was described. The growth consisted of subepithelial basophilic mucous cells containing glucosaminoglycans, eosinophilic large-granular cells with proteins and neutral polysaccharides, and mixed (acid + neutral mucopolysaccharides) cell types. Some subepithelial eosinophilic and basophilic gland cells were dividing and seemed to be the source of tumor growth. The mitotic index of growth cells reached 0.5% on some growth sections; however, many mitoses were pycnotic. The emergence of the tumor on the mussel mantle is probably related to a compensatory or regenerative hyperplasia of subepithelial mucous cells.
authors.affiliation: Institute of Marine Biology, Far East Branch of Russian Academy of Science, Vladivostok, Russia. aisa@vld.global-one.ru
authors.forename: L N
authors.initials: LN
authors.lastname: Usheva
authors.forename: N A
authors.initials: NA
authors.lastname: Odintsova
mesh_terms: D000818:Animals; D049872:Bivalvia; D005088:Exocrine Glands / Q000473:pathology; D008940:Mitotic Index; D009092:Mucous Membrane / Q000473:pathology; D009093:Mucus; D009369:Neoplasms / Q000473:pathology / Q000662:veterinary; D012426:Russia; D012623:Seawater; D014876:Water Pollution / Q000009:adverse effects