Objective: To estimate the specificity and sensitivity for diagnosing lesions of large intestine with magnifying chromoendoscopy according to pit pattern classification as proposed by Kudo in comparison with histology, and to provide morphologic proofs for tumor progresses in microstructure observed by SEM on the basis of pit patterns of various lesions of large intestine.

Objective To investigate the value of chromo magnifying colonoscopy in the diagnosis of mucosal neoplastic lesions of large intestine,and to learn the diagnostic ability of chromo magnifying colonoscopy in differentiating neoplastic and non-neoplastic lesions of large intestine.

Objective To compare the detection rates of colorectal adenomas by conventional colonoscopy,chromo colonoscopy and chromo magnifying colonoscopy.

Objective To investigate the diagnostic value of chromo magnifying colonoscopy advanced signs on advanced colorectal adenomas confirmed by pathological examination.

Application of magnifying colonoscopy in diagnosis and treatment of colorectal neoplastic lesions;

Methods Magnification chromoendoscopy ( MCE) was performed in 2506 patients with gastroesophageal reflux disease ( GERD) and 106 patients with Barrett esophagus in our hospital during Feb,2003 -Feb,2004 were analyzed.

Microstructural features of nonerosive reflux disease and their clinic value under magnifying chromoendoscopy

Microstructural analysis of gastric premalignant lesions under magnifying chromoendoscopy(MCE) in 90 cases