Aplasia cutis congenita of the scalp.

Aplasia cutis congenita is the congenital absence of skin. The majority of these defects involve the vertex of the scalp in the area overlying the sagittal sinus. The larger defects are predisposed to sudden lethal hemorrhage and require urgent closure. Local rotational scalp flaps are recommended for closure of the larger defects because they provide the most reliable coverage, eliminate the risk of infection and/or hemorrhage, and avoid the alopecia of secondarily healed wounds.