Exon 6, 13, 15, 17 of RET proto-oncogene were amplified by polymerase chain reaction (PCR) and analyzed by single strand conformation polymorphism (SSCP).

• 聚合酶链反应(PCR)扩增RET基因第6、13、15、17外显子；单链构象多态(SSCP)分析上述外显子是否有突变。