FABP4 and urinary bladder cancer: 11 reported that there was a loss of FABP4 expression in poor prognosis high‐grade pT1 bladder tumors compared to good prognosis tumors, further the transcript level significantly correlated to tumor stage and to histologic grade in bladder cancer. Tang et al. 15 reported that expression of FABP4 in non‐small cell lung cancer (NSCLC) was significantly associated with advanced tumor node metastasis (TNM) stage and had a negative impact on the OS of NSCLC patients.