Anatomopathological characteristics of calcinosis circumscripta in a dog

Abstract

Calcinosis circumscripta is a form of dystrophic pathological calcification characterized by nodular lesions of calcium salts in soft tissues, often associated with concomitant microtrauma. This report describes the case of a 1-year-and-7-month-old female mongrel dog who presented with a firm, whitish nodule in the elbow region. Histopathological examination (hematoxylin-eosin) revealed basophilic calcium deposits in the dermis, without systemic metabolic alterations, consistent with post-traumatic dystrophic calcification. Surgical excision re-
sulted in complete healing, with no recurrence after six
months of follow-up. This case highlights the early occurrence in a young patient, reinforcing the importance of histopathological diagnosis and surgical treatment. The location in an area of bony prominence suggests a relationship with specific trauma, contributing to the understanding of the etiopathogenesis of this condition in dogs. This report emphasizes the need to include calcinosis circumscripta in the differential diagnosis of specific nodular lesions in joint regions.