A CASE OF CUTANEOUS EPITHELIOTROPIC MALIG NANT-LYMPHOMA (MYCOSIS-FUNGOIDES) IN A HORSE

This article describes an eleven year old mare with apathy, fever, enl arged mandibular lymphnodes, skin lesions on the upper lip and edemato us, grey-red mucous membranes in the nose. mouth and vulva. Histopatho logy revealed infiltrates with atypical lymphocytes forming Pautrier's microabscesses. The neoplastic cells had large, often indented nuclei . Immunohistology showed Chat some cells were CD3-positive (Pan T-cell -marker). The diagnosis of cutaneous epitheliotropic malignant lymphom a (Mycosis fungoides) was made. The etiology in the horse is unknown.