ABSTRACT
Purpose To investigate the relationship between HPV infection and p53,p16,EGFR expression and prognosis in patients with salivary adenoid cystic carcinoma (ACC).Methods Totally 76 cases of adenoid cystic carcinoma specimens were selected,PCR-reverse dot blot hybridization was used to detect infection of HPV and SP immunohistochemical method was adopted to detect the expression of p53,p16,EGFR,Cdc2 in tumor tissues.Clinical data were collected and all the patients were followed up.The Kaplan-Meier method was used to estimate median overall survival and the Log-rank test to compare survival curves.Cox regression model was used for multivariate analyses.Results Infection rate of HPV in adenoid cystic carcinoma tissues was 0(0/76).The expression rate of p53,p16,EGFR,Cdc2 protein in adenoid cystic carcinoma tissues were 76.3％ (58/76),57.9％ (44/76),60.5％ (46/76) and 64.5％ (49/76)respectively.There was no correlation of the expression of p53,p16,EGFR and Cdc2 with gender,age,tumor location,TNM stage and histological type of patient.Kaplan-Meier survival analysis showed that EGFR-positive patients had shorter median overall survival rate (OS) than the negative ones (x2 =19.111,P ＜ 0.001).EGFR-positive patients had shorter median progression-free survival rate (PFS)than the negative ones (x2 =6.621,P ＜ O.01).Cdc2 positive patients had shorter median OS than the negative ones (x2 =3.870,P ＜ 0.05).Cdc2 positive patients had shorter median PFS than the negative ones (x2 =6.755,P ＜0.01).Cox regression analysis showed that expression of EGFR and Cdc2 was independent risk factors for the prognosis of patients with salivary gland ACC (relativerisk=13.417,13.075,P＜0.001).Conclusion There is no HPV infection detected in adenoid cystic carcinoma tissues.p53,p16,EGFR and Cdc2 are positively expressed in most salivary adenoid cystic carcinoma,p16 is unsuitable as a surrogate for HPV infection status of patient with ACC.Expression of EGFR and Cdc2 is independent risk factors in the prognosis of patients with salivary gland ACC.For the EGFR or Cdc2 positive patients should be followed up closely.
ABSTRACT
Objective To investigate the elinicopathologic features, diagnosis and differential diagnosis of oncocytic mucoepidermoid carcinoma of the salivary glands. Methods One case of oncocytic mucoepidermoid carci-noma was observed by clinicopathology and immunohistochemistry, followed by discussion through review of the litera-ture. Results The tumor was consisted of acidophilic cells, mucous cells,epidermoid cells and intermediate cells. The neoplastic cells arranged in a sheet, nest and glandular pattern, that were segregated by fibrous tissue. Some area the tumaor was composed of the same types of acidophilie cells,which had abundant finely granular eosinophilic cytoplasm, showed moderate unclear atypia. Histochemistry staining: the mucous secretory cells and some epidermoid cells were positive for PAS. IHC staining, the tumor cells were positive for CK7 and CK20 ,focal positive reaction to CEA, negative for NSE and CgA. Conclusion Oncocytic mucoepidermoid carcinoma is an extremely rare subtype of mucoepidar-moid carcinoma of the salivary glands. Histological examination plays an important role in diagnosis of this tumor. More attention should be paid on the daily practice in order to differentiate this tumor from oncocytic adenoma, pleomorphic adenoma and mucinous cystadenoma.