颌小畸形可分为先天性与后天性者,以前者为多见。先天性颌小畸形又称Pierre Robin氏症候群,包括下颌骨发育不全,舌下垂与随之而引起的呼吸困难。因其可与腭裂、下腭面部发育不全与外耳及中耳畸形等同时存在,且皆系第一腮弓发育障碍所致,故Mckenzie氏又将其统称之为第一腮弓症侯群。我们遇及先天性与后天性颌小畸形各一例,报导如下,并加以讨论。 Small jaw deformity can be divided into congenital and acquired, the former is more common. Congenital mandibular small deformity, also known as Pierre Robin's syndrome, includes mandibular hypoplasia, tongue drooping and consequent dyspnea. Because of its cleft palate, the lower palate facial hypoplasia and the outer ear and middle ear deformities exist at the same time, and are all caused by the first development of the division of the maxillary bowel, so Mckenzie also collectively referred to as the first group of gingival syndrome. We encountered one case of congenital and acquired small jaw deformities, reported as follows, and to be discussed.