On 7/23/08, Tess, a 12 year old female spayed English bulldog, presented to the Oncology service at the Cornell University Hospital for Animals for evaluation of oral masses. The owners first noticed that Tess was bleeding from the right side of her mouth in March of 2008, and closer examination revealed an ulcerated mass. This was attributed to possible trauma due to stick chewing or lip biting. The mass, however, did not resolve, and was surgically removed in May of 2008. Histopathologic diagnosis was a benign plasmacytoma, however, there was vigorous oral mass regrowth within 2-3 weeks of the surgical removal. Tess also developed skin lesions at this time that consisted of round, scabby plaques that were mainly concentrated on her ventrum. Baytril was prescribed for her presumptive skin infection. Tess was referred to Cornell for further evaluation and treatment of her rapidly growing oral masses. Upon physical examination, Tess was bright and alert. Complete blood count, serum chemistry and urinalysis were within normal limits with the exception of a mild hyperkalemia. Three view thoracic radiographs revealed no significant findings. Biopsies were obtained from her oral masses and cutaneous lesions. Aspirates were also taken from her right mandibular lymph node, which was enlarged and firm. The biopsy results and cytologic analysis were consistent with a diagnosis of cutaneous epitheliotropic T-cell lymphoma (CETL).