A case of aplasia cutis congenita occurred. The area in the scalp was 2.5 × 3.5 cm in dimension and was over the vertex. The area rapidly ulcerated and was treated three days after birth with debridement and coverage with a silicone elastomer membrane. Three weeks later the membrane was excised and the area successfully grafted with split-thickness skin. The defect involved the bone but not the underlying dura. Coverage of some sort is a matter of high priority in case there is a defect in the dura.