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Linear calcinosis cutis is a very rare disorder; reported in association with lichen sclerosus etatrophicus, scleroderma, after intravenous infusion of calcium and acute monocytic leukemia. In available literature, idiopathic zosteriform calcinosis cutis is yet to be described. An 8-year-old child presented with spontaneous painful, slowly progressive, linear band-like nodules over the right half of the chest and back of the trunk. Histopathology with special stains was done to confirm the diagnosis. The patient was treated with diltiazem and responded well. We report a case of idiopathic zosteriform calcinosis cutis because of unusual presentation and rarity of the disorder.