PBL(Problem-based learning)teaching method is going to be the innovation tendency in medical education model gradually.Case design was the key to the success of PBL case teaching of pre-clinical clerkship stage in oral medicine teaching.Some important matters for case selection and design were discussed in this article.

OBJECTIVE: To investigate the significance and relationship between the expression of FOXC1 and clinicopathological features, and to explore its correlation with E-cadherin. METHOD: Immunohistochemical SP method was used to detected the expression of FOXC1 in nasopharyngeal carcinoma tissues and nasopharyngitis tissues. RESULT: (1) Immunoreaction to FOXC1 was mainly located in nucleus of nasopharyngeal carcinoma cells. The positive expression rate of FOXC1 in nasopharyngeal carcinoma tissues was 85.3% (81/95), which was significantly higher than that in nasopharyngitis tissues (59.4%) (P < 0.05). (2) The expression of FOXC1 was not related to patients' age and gender, clinical stage of cancer and lymph node metastasis (P > 0.05). (3) There was a correlation between the expression of FOXC1 and down-regulated expression of E-cadherin in nasopharyngeal carcinoma tissues (P < 0.05). CONCLUSION FOXC1 may play an important role in generation and progression of nasopharyngeal carcinoma, there may be a correlation between the expression of FOXC1 and down-regulated expression of E-cadherin, also FOXC1 may play an important role in the process of EMT in nasopharyngeal carcinoma by regulating E-cadherin.
Adolescent ; Adult ; Aged ; Antigens, CD ; Cadherins ; metabolism ; Carcinoma ; Female ; Forkhead Transcription Factors ; metabolism ; Humans ; Male ; Middle Aged ; Nasopharyngeal Carcinoma ; Nasopharyngeal Neoplasms ; metabolism ; pathology ; Nasopharyngitis ; metabolism ; Young Adult