Aplasia Cutis Congenita on Lumbosacral Area

Aplasia cutis congenita (ACC) is a rare congenital condition characterized by the absence of skin, most commonly on the scalp, but it can also occur on other body parts. The exact cause is unknown, but genetic factors, teratogens, and trauma are suspected. A case of a 10-day-old female with two sharply demarcated ulcers on the lumbosacral area was presented, with no history of maternal teratogen exposure or trauma. The ulcers were healing spontaneously, and no systemic abnormalities were found. ACC diagnosis was based on clinical findings, and the mother was reassured about the condition. ACC in the lumbosacral area is rare and can be associated with other abnormalities, though none were present in this case.