Congenital infiltrating lipomatosis of the face with hemimegalencephaly.

Congenital infiltrating lipomatosis of the face (CILF) is a rare disorder, causing unilateral facial asymmetry characterized by enlargement of the cheek or chin. Hemimegalencephaly is a unique malformation characterized by enlargement of a cerebral hemisphere. The association of CILF and hemimegalencephaly has rarely been reported. We present a case of unilateral facial swelling in a 1.5-year-old boy in whom magnetic resonance imaging and computed tomography revealed CILF associated with unilateral megalencephaly.