However, we didn't find CD55 rs2564978 polymorphism effect on the risk of squamous-cell carcinoma (CC versus TT, OR = 0.06, 95% CI = 0.99–2.30) and other types (CC versus TT, OR = 2.36, 95% CI = 0.70–7.95). Here, CD55 is linked to squamous cell carcinoma.