TIMP1 and gastric carcinoma: Three patterns were observed according to MMP-7 and TIMP-1 expression in gastric carcinoma tissues: A, negative expression of both MMP-7 and TIMP-1, n = 139 (48.8%); B, positive MMP-7 and negative TIMP-1 expression or negative MMP-7 and positive TIMP-1 expression, n = 116 (40.7%); and C, positive expression of both MMP-7 and TIMP-1, n = 30 (10.5%).