Additionally, weaker positive effects were observed for cathepsin H levels and the risk of squamous cell carcinomas, and cathepsin G levels and the risk of adenocarcinoma, respectively, only by the IVW method (p = 0.032, OR = 1.053, 95% CI = 1.005–1.104; p = 0.041, OR = 1.095, 95% CI = 1.004–1.195) (Table 1). Here, CTSH is linked to squamous cell carcinoma.