J Cancer 2017; 8(18):3828-3837. doi:10.7150/jca.20935

Research Paper

Ki67 Proliferation Index as a Histopathological Predictive and Prognostic Parameter of Oral Mucosal Melanoma in Patients without Distant Metastases

Xuhui Ma1, 2*, Yunteng Wu1, 2*, Tian Zhang1, 2, Hao Song1, 2, Houyu Jv1, 2, Wei Guo1, 2✉, Guoxin Ren1, 2✉

1. Department of Oral and Maxillofacial-Head and Neck Oncology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, 200011, China;
2. Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology; National Clinical Research Center of Stomatology.
* XH Ma and YT Wu contributed equally to this article.

Abstract

Background: To investigate the relationship between clinical and histopathological characteristics and overall survival of patients with oral mucosal melanoma (OMM) without distal metastasis in order to provide predictive prognostic information of OMM.

Methods: Ki67 expression was assessed by immunohistochemistry in 123 patients with OMM without distant metastases. The associations between Ki67 expression and clinical features and overall survival (OS) of patients were statistically analyzed. The Ki67 levels of the primary and recurrent lesions from 14 OMM patients were compared.

Results: Univariate analysis showed that tumor type and cervical lymph node (CLN) status, as well as Ki67 expression, were all correlated with survival. Cox proportional hazards regression analysis identified Ki67 expression and CLN status as independent prognostic factors in OMM patients. Further, we found that Ki67 expression was associated with clinical tumor type of OMM. Moreover, with a cut-off point of 20%, patients with lower Ki67 scores showed a survival advantage over those with higher Ki67 scores.

Conclusions: Ki67 expression may be a useful pathological predictor of survival of OMM patients without distant metastases.

Keywords: Oral mucosal melanomas, Ki67 expression, proliferation markers, prognosis, clinical characteristics.

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How to cite this article:
Ma X, Wu Y, Zhang T, Song H, Jv H, Guo W, Ren G. Ki67 Proliferation Index as a Histopathological Predictive and Prognostic Parameter of Oral Mucosal Melanoma in Patients without Distant Metastases. J Cancer 2017; 8(18):3828-3837. doi:10.7150/jca.20935. Available from http://www.jcancer.org/v08p3828.htm