Congenital double lip: a review of seven cases.

Congenital double-lip deformity is an infrequent developmental abnormality affecting the lips, more commonly the upper lip. We report seven cases of double lip, all in males, of which six were in the upper lip and one in the lower lip. It was quite interesting to observe that in the upper lip, the buccal portion of the double lip appeared on either side with a midline constriction; in the lower lip, it was prominent in the midline without any central constriction. Surgical excision under regional nerve block anesthesia gives good results. The embryology, clinical appearances, and histopathology are discussed with a review of the literature.