Congenital lower lip pits often appear as one of the main features of Van der Woude syndrome (VWS), which is an autosomal dominant disorder syndrome. Although most cases are associated with cleft lip, cleft palate, or both, some cases are rarely accompanied by anomalies other than cleft lip and palate. Lower lip pits are usually excised for cosmesis, but some of them have mucocele as a complication. In this paper, we report a case of lower lip pits associated with commissural pits, which was complicated by a mucocele after excision.
A 5-year-old boy was referred to our hospital because of an abnormal form of his lower lip. He had two lower lip pits and bilateral commissural pits, but no other anomalies. He was suspected to have VWS because his father also had lower lip pits. We excised the lip pits for cosmesis. However, a mucocele occurred in his right lower lip 1 month after the operation. After cystectomy, the shape of the lower lip became satisfactory, and the clinical course has been good.
