Idiopathic calcinosis cutis presenting as iliac region mass in an elderly female: A rare entity with cyto-histopathological correlation

AbstractCalcinosis cutis is a group of disorders characterized by the deposition of calcium salts in the skin and subcutis. It is divided into four different forms based on the etiology: dystrophic, metastatic, idiopathic, and iatrogenic. Idiopathic calcinosis cutis is diagnosed when the other three types have been excluded. We report a case of a 68-year-old female who developed a gradually progressive, hard, nodular swelling in the right iliac region. Clinically it was provisionally diagnosed as a neoplastic lesion. Ultrasound revealed a hyperechoic lesion in the subcutaneous plane, suggestive of a calcified lesion. Fine needle aspiration cytology revealed paucicellular smears, showing aggregates of scattered crystalloid amorphous material favoring the possibility of calcinosis cutis, later confirmed on histopathology. Calcific deposits may clinically mimic a tumor. However, cytology can provide a preliminary diagnosis thus assisting the clinician in the accurate management of these patients.