4p-症候羣爲第4染色體短臂部分脫失引起先天異常之症候羣。本病例爲2歲女孩,有智能不足,精神運動遲緩,痙變,特殊面貌如:小頭,眉間部突出,高鼻樑,兩眼分離過遠,眼瞼下垂,斜視,魚形嘴,小頜,耳形大而單純,皮膚紋理異常,其染色體核型爲46,XX,4p-。
Clinical and cytogenetic findings of a 2-year-old girl with partial deletion of the short arm of chromosome No.4 (4p-syndrome) are described. The major abnormalities were as follows: severe mental and psychomotor retardation, seizure, microcephaly, prominent glabella, beaky nose, hypertelorism, antimongoloid slant, strabismus, carplike mouth, micrognathia and abnormal dermatoglyphics. The karyo-types of her parents and the elder brother were normal. The 4p- syndrome can be differentiated from the 5p- (cri-du-chat) syndrome by the absence of cat-like cry.