Tumor-like lesions in the mantle of the mussel Modiolus difficilis from the Sea of Japan

Diseases of Aquatic Organisms

L. N. Usheva¹  N. A. Odintsova¹ 

关键词: Hyperplasia;    Lesion;    Mantle;    Mitotic index;    Mucous cells;    Mussel;   

DOI  :  10.3354/dao035063

学科分类：生物科学（综合）

来源: Inter-Research

【 摘 要 】

ABSTRACT: Two inner growths in the mantle beneath the epithelium were found in 1 of 1000 mussels Modiolus difficilis from Amursky Bay, Sea of Japan, within the city precincts of Vladivostok. Both growths were about 2000 µm in maximal diameter insection and elevated slightly above the mantle surface. The mantle epithelium near the growths formed deep invaginations, and clusters of mucous cells were numerous beneath the epithelium. Histological and histochemical methods were employed. Twodifferent kinds of growth were revealed. The off-white growth consisted of cells with thin granular or vesicular cytoplasm containing glucosaminoglycans, proteins and a small amount of neutral polysaccharides. Growth cells were pure white in color aftertreatment of preparations with 1% H₂SO₄ and differed markedly from the mantle cells. The yellow growth consisted of large granular cells with neutral polysaccharides and proteins. Although growths were composed of different kinds ofcells, they seemed to be derived from subepithelial mucous cells. This was supported by histological and histochemical staining reactions of some tumor and mantle epithelial cells. Mitotic indices (MI) of growths and subepithelial mucous cells were zero,MI of ciliated mantle epithelium reached 0.07%. The lesions were areas of strongly altered mucous cells of mantle epithelium and were non-neoplastic.

【 授权许可】

Unknown