Idiopathic Localised Perforating Calcinosis Cutis Over the Bilateral Distal Phalanx of the Middle Finger - A Rare Case Report

Calcinosis cutis or cutaneous calcification occurs when calcium is deposited into the skin and subcutaneous tissue. It is classified into five primary types: Dystrophic, metastatic, idiopathic, iatrogenic and calciphylaxis. Idiopathic calcinosis cutis is a rare phenomenon that occurs in the absence of a known tissue injury or systemic metabolic defect. The various types of idiopathic calcinosis are idiopathic calcinosis of scrotum/penis/vulva, milia-like idiopathic calcinosis cutis, subepidermal calcified nodule, tumoural calcinosis, localised calcinosis cutis and calcinosis universalis. It is essential to delineate it from other calcification disorders for further plan of management. We report one such case of idiopathic localised perforating calcinosis cutis, symmetrically over a bilateral distal phalanx of the middle finger in a 72-year-old female.