MAGEA3 and colorectal adenoma: In addition, recent studies have shown that the number of three long-chain RNAs (two mRNAs, KRTAP5–4, MAGEA3 and one lncRNA, BCAR) in serum exosomes of patients with colorectal adenoma is significantly different from healthy subjects, with the area under the ROC curve (AUC) being 0.936.