Oh Suk Joon
Department of Burn Reconstructive Surgery, Bestian Seoul Hospital, Seoul, Korea.
Arch Craniofac Surg. 2019 Aug;20(4):265-269. doi: 10.7181/acfs.2019.00297. Epub 2019 Aug 20.
Congenital hypoplasia of the depressor anguli oris muscle is a rare cause of asymmetrical crying facies in newborns. The clinical manifestations range from mild to severe asymmetry and may persist up to adulthood. In the current case, the patient did not exhibit other congenital anomalies or paralysis of other branches of the facial nerve. This adult patient presented with severe asymmetrical lower lip deformity during full mouth opening since birth. A chromosomal study for the detection of 22q gene deletion yielded negative results. The electromyography findings of the lower lip were insignificant. Depressor labii inferioris muscle resection was not effective, but bidirectional (horizontal and vertical) fascia lata grafting improved the aesthetic appearance of the asymmetrical lower lip. The patient showed improved lower lip symmetry during full mouth opening at 1 year after the surgery. Therefore, the details of this rare case are reported herein.
先天性口角降肌发育不全是新生儿不对称哭泣面容的罕见原因。临床表现从轻度到重度不对称不等，可能持续至成年期。在当前病例中，患者未表现出其他先天性异常或面神经其他分支的麻痹。该成年患者自出生以来在全口张开时出现严重的不对称下唇畸形。检测22q基因缺失的染色体研究结果为阴性。下唇的肌电图检查结果不明显。下唇降肌切除术无效，但双向（水平和垂直）阔筋膜移植改善了不对称下唇的美观。术后1年，患者在全口张开时下唇对称性有所改善。因此，本文报告了这一罕见病例的详细情况。
