We report a case of idiopathic calcinosis cutis diagnosed by fine needle aspiration cytology in a 50-yr-old female who presented with a subcu taneous swelling near the left iliac crest. Cytological finding of amorphous calcium salts with histiocytes and the appropriate clinical background led to the cytodiagnosis of idiopathic calcinosis cutis as subsequently confirmed on histopathology. Pitfalls in the diagnosis of calcinosis cutis on cytology smears are also discussed.