Canine cutaneous epitheliotropic T‐cell lymphoma: Mucosal lesions found in a Pembroke Welsh corgi

Abstract

Abstract A 12‐year‐old Pembroke Welsh corgi presented with lesions analogous to those seen in canine chronic ulcerative stomatitis. Advanced diagnostic methods revealed the mucosal lesions to be representative of canine cutaneous epitheliotropic T‐cell lymphoma—a disease process usually seen in the cutaneous form, not solely isolated to mucosal lesions. Minimal aberrant clinical signs were shown by the patient apart from lip‐smacking and a decreased appetite. Histological evaluation of the mucosal tissue demonstrated by the overwhelming presence of CD3 + lymphocytes helped confirm the diagnosis in this case. A poor prognosis is generally associated with cutaneous epitheliotropic T‐cell lymphoma with a median survival time of approximately 1 year. Although limited treatment options are traditionally available, complete remission was achieved within several weeks using a protocol of lomustine and corticosteroids.