CST5 and renal cell carcinoma: Specifically, Oncostatin-M (OR = 1.277, 95% CI 1.062–1.537, p = 0.009), MMP-1 (OR = 1.196, 95% CI 1.010–1.417, p = 0.038), and Cystatin D (OR = 1.115, 95% CI 1.023–1.215, p = 0.014) are significantly associated with an elevated risk of RCC.