Cutaneous epitheliotropic T-cell lymphoma in a dog observed during treatment for iatrogenic Cushing disease which was removed by surgical resection

: A 7-years-old, mix breed, male dog was referred to our hospital with intractable dermatitis. About one year earlier, this dog had been referred to a veterinarian who had been treating it for dermatitis around the prepuce. Initially, we diagnosed with iatrogenic Cushing disease with steroid dermatopathy and modified the treatment. After tapering oral prednisolone and discontinuing the topical steroid, the dog recovered in 5 months. After a further 1 month, a nodular lesion was observed around the preputial orifice. A biopsy was performed and, a histopathological diagnosis of epitheliotropic T-cell lymphoma was made. Complete remission has been sustained for approximately 10 months following resection.