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Title: Expression of cluster of differentiation 9 glycoprotein in benign and malignant parotid gland tumours. Author: Sakamoto K, Ono T, Nakamura Y, Harada H, Nakashima T. Journal: J Laryngol Otol Suppl; 2009; (31):58-63. PubMed ID: 19460206. Abstract: OBJECTIVES: This study aimed to clarify the significance of cluster of differentiation 9 glycoprotein gene expression in human parotid gland tumours. METHODS: We retrospectively analysed immunohistochemical staining for cluster of differentiation 9 glycoprotein in parotid gland tumours. RESULTS: Cluster of differentiation 9 glycoprotein was consistently detected in the normal parotid gland. Regarding benign parotid gland tumours, cluster of differentiation 9 glycoprotein was present in 13 of 18 pleomorphic adenomas, in all Warthin tumours tested (21/21) and in all cases of basal cell adenoma tested (four of four). In contrast, positive staining for cluster of differentiation 9 glycoprotein was less often observed in malignant parotid tumours. Cluster of differentiation 9 glycoprotein was present in 11 of 14 mucoepidermoid carcinomas, in two of five acinic cell carcinomas and in two of five adenoid cystic carcinomas. CONCLUSIONS: There was a statistically significantly reduced expression of cluster of differentiation 9 glycoprotein in malignant parotid gland tumours, compared with benign parotid gland tumours (p < 0.05). These results suggest that a low level of cluster of differentiation 9 glycoprotein expression in parotid gland tumours may be associated with malignancy.[Abstract] [Full Text] [Related] [New Search]