Objective: To present a rare case of an isolated paramedian cleft of the lower lip. We describe the second case of isolated paramedian cleft of the lower lip. The pregnancy was realized in the fifth month prior to which the mother gives history of consumption of non-steroidal anti-inflammatory drugs (N.S.A.I.D.s) and a computed tomography (C.T.) scan. The cleft was repaired with a z-plasty for the mucosa and a z-plasty for the skin. We achieved good vermilion bulk, white roll continuity and functionality. We attributed this cleft to maternal exposure to NSAIDs and radiation during early pregnancy.
Keywords: cleft li; etiology; facial cleft.