[Aplasia cutis congenita: report of 4 additional cases and review of the literature].

Aplasia cutis congenita is a heterogeneous group of disorders characterized by focal absence of skin at birth. In the majority of cases, the involved area is limited to the scalp. These disorders are relatively rare. As a result of misinterpretation, medicolegal advice can be sought by parents who believed that their child's scalp had been injured during surgical induction of labour or fetal monitoring. We report four additional patients (two familiar and two sporadic cases) and discuss, in the light of a comprehensive review of the literature, the probable pathogenesis, the clinical variability and the treatment.