Congenital unilateral lower lip palsy and eventration of diaphragm.

Congenital unilateral lower lip palsy is a rare but well-known limited variation of congenital unilateral facial palsy. We report a three-month-old boy with diaphragmatic eventration and isolated lower lip palsy, a combination that to our knowledge, has not been described before. Probable causes of this combination of multiple congenital malformations, in this case, could be due to nonrandom and heterogeneous mutations. The diaphragmatic eventration was treated successfully.