Circulating adiponectin as a biomarker in renal cell carcinoma: a systematic review and meta-analysis.

: Metabolic imbalance in renal cell carcinoma (RCC) can lead to abnormal adiponectin levels. : To evaluate circulating adiponectin as a detection or predictive marker for RCC. : A comprehensive literature search and meta-analysis was performed on studies reporting circulating adiponectin levels and RCC.