Neoplasia in flat head grey mullet, Mugil cephalus Linnaeus, 1758 (Perciforms: Mugilidae): two case reports of myxoinflammatory fibroblastic sarcoma and leiomyoma

Abstract

The presence of cutaneous neoplasms is reported in two cases of wild female grey mullet (Mugil cephalus) from Pazhayar and Parangipettai fish landing centre, southeast coast of India. A gross morphological examination case 1 revealed obvious reddish white, solitary and fleshy appearance of tumour located on behind the right-side of the anal fin, and the overlying epidermis was ulcerated, hyperemic and hyperchromatic. The tumour had a gelatinous consistency and released jelly-like matters. The tumour-affected case 2 revealed well-circumscribed, solitary and reddish fleshy appearance of tumour located on the left-side of the deep margin of the flank, the lesion covered with whitish-grey thin epidermal layer. Histolopathologically, the (case 1) tumour growth had distinct simulate bizarre tumour cells embedded in myxoid matrix with inflammatory infiltrates. The (case 2) tumour lesion showed interlacing bundles of spindled to elongated tumour cells with cigar-shaped nuclei. On the basis of the clinical and histolopathological findings, these tumours are diagnosed as myxoinflammatory fibroblastic sarcoma and leiomyoma.

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