PROS1 and lymphoma: Other frequent categories are carbohydrate antigens such as Lewis and related antigens (LEWIS, 3.3%), and popular antigens such as mucin (5.5%), Her2 and associated antigens (6.4%), MAGE and associated antigens (4.8%), prostate associated antigens (PROS, 4.0%), p53 (2.6%), antigens associated with lymphoid cancers (LEU, 5.6%), and CEA (2.1%).