Source:http://linkedlifedata.com/resource/umls/id/C0008924
MSH: Congenital defect in the upper lip where the maxillary prominence fails to merge with the merged medial nasal prominences. It is thought to be caused by faulty migration of the mesoderm in the head region.,CSP: congenital defect in the upper lip where the maxillary prominence fails to merge with the merged medial nasal prominences; thought to be caused by faulty migration of the mesoderm in the head region.,NCI: A congenital abnormality consisting of one or more clefts (splits) in the upper lip, which may be accompanied by a cleft palate; it is the result of the failure of the embryonic parts of the lip to fuse.