Abstract
Calcinosis circumscripta of the tongue is described in 6 large, young dogs. The lingual lesions are identical with calcinosis circumscripta as described in the literature and 10 subcutaneous lesions that we examined. It is suggested that the lingual and subcutaneous lesions are part of one disease process and that the former are more frequent than is indicated in the literature. Apocrine glands were not found in association with the lingual lesions or at comparable sites in the tongues of 6 unaffected dogs; it appears that their presence is not a prerequisite for the development of the lesion. Ten calcifying epitheliomas were also examined and evidence is presented which strongly suggests that this lesion be distinct from calcinosis circumscripta.