Opinion: Focus on the fetal Sylvian fissure.

The article comments on two papers concerning the development of the Sylvian fissure, one of the major brain maturational processes occurring in fetal life. A paper by E. Quarello and colleagues defined six gross landmarks in the normal operculization process. A paper by L. Quibaud and colleagues presented their experience with the prenatal diagnosis of abnormal development of this structure. The papers facilitate prenatal diagnosis and counseling.