Methods: Polymerase chain reaction-single strand conformation polymorphism(PCR-SSCP) was used to exclude known gene mutation of HGF from 2 familial gingival fibromatosis.

• 方法：采用PCR-SSCP-银染的方法对2例遗传性牙龈纤维瘤病家系的致病基因进行排除性定位。