JOURNAL ARTICLE

Decreased expression of mucin 18 is associated with unfavorable postoperative prognosis in patients with clear cell renal cell carcinoma

Qi Bai, Li Liu, Qilai Long, Yu Xia, Jiajun Wang, Jiejie Xu, Jianming Guo
International Journal of Clinical and Experimental Pathology 2015, 8 (9): 11005-14
26617818

BACKGROUND: MUC18 is correlated with tumor progression and metastasis in types of malignancy. But the role of MUC18 in clear cell renal cell carcinoma remains unclear. In this study, we aimed to investigate the expression of MUC18 and its correlation with clinical outcomes in clear cell renal cell carcinoma.

PATIENTS AND METHODS: Immunohistochemical staining was performed in samples from 288 patients with clear cell renal cell carcinoma. We used Kaplan-Meier method and Cox proportional hazard models to value the association between MUC18 expression and clinical outcome. Nomogram was constructed to predict overall survival at 5 and 8 years after nephrectomy.

RESULTS: MUC18 expression was significantly decreased in tumor compared to non-tumor tissue (P<0.001). Lower MUC18 expression in tumor predicted a shorter survival time (P=0.007). By multivariate cox analysis, MUC18 was defined as an independent prognostic factor (P=0.006). The nomogram performed better in predicting 5- and 8-year overall survival than the TNM stage alone in clear cell renal cell carcinoma.

CONCLUSION: MUC18 is an independent prognostic factor for clear cell renal cell carcinoma and could be incorporated with the other parameters to predict 5- and 8-year overall survival for clear cell renal cell carcinoma patients.

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