A case of sporadic cutaneous T-cell lymphosarcoma in a 3-year-old Holstein cow.

A 3-year-old Holstein cow was presented with generalized cutaneous plaques and nodules after receiving topical eprinomectin at 136 days in milk. The cow's health was otherwise normal, she was seronegative for bovine leukemia virus, and her lesions regressed by 200 days in milk. The cutaneous form of sporadic bovine T-cell leukosis was diagnosed. Key clinical message: This report describes a case of sporadic bovine cutaneous T-cell lymphosarcoma.