Expression of p27 gene and cyclinE in esophageal precancerous lesions from the subjects at high-incidence area for esphageal cancer in Henan;

Protein and mRNA expression of PCDGF gene in laryngeal squamous cell carcinoma and precancerous lesions;

Tissue microarray assay of CD44v6 and PCNA expression for oral squamous cell carcinomas and precancerous lesions and its clinical significance;

Helicobacter pylori infection and changes of cell gap junction of gastric epithelial cells in patients with gastric cancer and precancerous lesion;

Significance of expression of APC gene in gastric cancer,precancerous lesion and gastric adenoma;

Significance of Matrix Metalloproteinase-9 mRNA Expression in Human oral carcinogenesis and precancerous lesion;

Effectiveness of Microresection Combined with Radiofrequency Ablation under Laryngoscope and Rigid Telescope for Laryngeal Precancerosis;

Influences of Yangzheng Sanjie Decoction on EGF,EGFR of Gastric Mucosa at Precancerosis of Chronic Atrophic Gastritis;

Relationship between Helicobacter pylori infection and expression of ras p21 and p53 in gastric carcinoma and precancerosis;

Expression of HPV18E2 gene in cervical cancer and premalignant lesions and its clinical significant;

Cloning of novel gene GP1 associated with gastric cancer and its premalignant lesions

It has been showed that the treatment and prevention of early cancer and premalignant lesions can reduce mortality and morbidity in colorectal cancer.