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Diseases of Aquatic Organisms

    DAO prepress abstract   -  DOI:

    Gastric leiomyoma in a sea bass Dicentrarchus labrax broodfish

    C. Iaria*, F. Capparucci, G. De Benedetto, S. Natale, R. Panebianco, R. Puleio, G. Lanteri

    *Corresponding author:

    ABSTRACT: This report describes a spontaneously arising non-infiltrative neoplasm of gastric tunica muscularis in a broodstock sea bass Dicentrarchus labrax from an Italian aquaculture farm. Microscopically, the mass was circumscribed and non-encapsulated and was composed of spindle cells arranged in parallel interlacing bundles or, occasionally, a whirling pattern. Cells had a small quantity of eosinophilic cytoplasm with distinct cell borders. Neoplastic cells were immuno-reactive with smooth muscle actin, vimentin and desmin; S100 was negative. The mucosal epithelium was intact with no neoplastic involvement. A gastric leiomyoma was diagnosed based on the findings. More efforts should be made to study the possible aetiology of leiomyoma affecting fish from aquaculture.