当人类胚胎发育至第四周时,位于原始口裂上方正中处有一额鼻突和居于上方两侧的两个上颌突形成。额鼻突形成后不久,即在下端分为一个中鼻突和两个侧鼻突。侧鼻突与上颌突之间有一沟称为鼻颌沟。若此处在胚胎期因某种原因造成连合障碍,则出生后表现为斜面裂。本病不多见,我们在临床上遇到1例,现报告如下。患者女,13岁,于1984年2月18日入院,住院号 When the human embryo develops to the fourth week, there is an amount of nasal processes in the middle of the primary spur and two maxillary processes in the upper side. Shortly after the formation of forehead nasal deformity, which is divided into a middle and two lateral nasal process at the bottom. Side of the nasal process and the maxillary process between a ditch called the nasal ditch. If here in the embryonic period for some reason causing joint disorder, after birth showed bevel. The disease is rare, we encountered in clinical cases, are as follows. Female patient, 13 years old, admitted to hospital on February 18, 1984, hospital number