The 5p deletion syndromes are further divided into 8 types according to the presence or absence of 4 main clinical symptoms, namely, cat-like cry, facial features, mental retardation, and multiple malformations.

• 其次，根据5p缺失综合征四个主要临床症状，即似猫叫哭声、典型面部特征、智力低下、以及不同的畸形来剖析5p缺失综合征，将5p缺失综合征患者按表型分为8类，并确定了这8类患者在5号染色体短臂上相应的缺失区域。