Methods The expression of MMP-7 in 8 subjects with normal common bile ducts, 4 subjects of congenital choledochal cyst and 25 subjects of BDC were detected by immunochemical staining (S-P method).

• 方法 采用 S- P法进行MMP- 7的免疫组化染色。 结果 MMP- 7的表达阳性率为 92%25。