Exfoliative dermatitis is an inflammatory disorder causing scaling and
erythema which cannot be classified immediately as some other disease
process, The dermatitis may occur as an idiopathic entity without pre
ceding dermatologic or systemic disease or as a severe manifestation o
f several disorders. Thymomas are rare neoplasms in cats. Most thymoma
s are benign and surgical excision may be curative. if the thymoma is
the cause, its removal could cure the dermatosis. This article reports
exfoliative dermatitis associated with thymoma in three cats.