MAGEA1 and esophageal squamous cell carcinoma: Melanoma-associated antigen 1 (MAGEA1) is a member of the melanoma-associated antigens family A (MAGE-A) and is closely related to the prognoses of various malignant tumors, such as esophageal squamous cell carcinoma (30), lung cancer (31), gastric cancer (32), liver cancer (33), and breast cancer (34).