association of fas a-670g polymorphism and risk of uterine leiomyoma in a southeast iranian population

background: uterine leiomyoma (ul) is a benign tumor of uterine smooth muscle that affects women in reproductive ages. fas has an important role in initial stages of apoptosis. previous studies have shown an association between the fas gene and tumorigenesis. in the present study, we evaluated the relationship between fas a-670g (rs 1800682) and ul risk. methods: the fas gene polymorphism of 155 women with ul and 157 healthy controls was analyzed by the polymerase chain reaction restriction fragment length polymorphism method. results: the aa, ag, and gg genotype frequencies of the fas a-670g polymorphism were respectively 37.4, 42.6, and 20% in women with ul, and 46, 42.6, and 11.5% in healthy controls. the risk of ul in women was 1.5-fold greater in gg-genotype women than in aa-genotype women. the g allele frequencies were 41% in women with ul and 33% in healthy controls and statistically different (p = 0.03). conclusions: the fas polymorphism was associated with the risk of ul in a sample of iranian women.