MMP1 and nasopharyngeal carcinoma: To screen the potential diagnostic markers in NPC, the levels of 23 secretory MMPs (MMP1, 2, 3, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19, 20, 21, 23A, 24, 25, 26, 27 and 28) in serum samples from 15 healthy controls and 26 NPC patients were detected by Human Cytokine Antibody Array 2000.