Calcinosis Circumscripta

Calcinosis circumscripta is a condition in which calcium salts become deposited in the skin or soft tissues, forming firm lumps that can vary in size. These deposits typically appear near joints—most commonly around the tongue, paws, or elbow—and may develop slowly over weeks to months. The lumps can sometimes ulcerate and release a chalky, white material. Owners often notice a single firm swelling that feels hard or gritty beneath the skin, sometimes accompanied by licking or discomfort if the area becomes inflamed or breaks open. Young, large-breed dogs are more commonly affected, though the condition can occur in any breed or age. The deposits may remain stable, grow slowly, or occasionally resolve without intervention. This page explores the patterns that may prompt consideration of this condition, what is understood about why calcium becomes deposited in these sites, how the diagnosis is typically confirmed, and the range of approaches that exist for managing or removing the deposits.