Statistically significant differences were observed in mean serum sFasL levels between NCL subjects and H-SIL (94.202 pg/ml and 74.152 pg/ml, respectively, P=0.01) and CC (68.011 pg/ml, P=0.047), except for NCL subjects and L-SIL cases (P = 0.61). Here, FASLG is linked to squamous cell intraepithelial neoplasia.