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        Prognostic Evaluation of Nasopharyngeal Carcinoma with Bone-Only Metastasis after Therapy

        Jianji Pan,Tianzhu Lu,Qiaojuan Guo,Xiaofei Cui,Zhuhong Chen,Shaojun Lin,Luying Xu,Jin Lin,Jingfeng Zong 연세대학교의과대학 2016 Yonsei medical journal Vol.57 No.4

        Purpose: To evaluate the prognosis of nasopharyngeal carcinoma (NPC) patients who developed bone-only metastasis after primarytreatment and the stratification of these patients into different risk groups based on independent prognostic factors. Materials and Methods: Eighty NPC patients who developed bone-only metastasis after definitive radiotherapy from October 2005to December 2010 were enrolled. All these patients received palliative treatment for bone metastasis, including chemotherapyand/or radiotherapy. Clinical features, treatment modality, and laboratory parameters were examined with univariate and multivariateanalyses. Results: The median follow-up time was 15.5 months (range, 2–67 months) for the whole cohort. The median overall metastaticsurvival (OMS) time and the 2-year estimate OMS rate were 26.5 months and 52%, respectively. Multivariate analysis indicated thatpatients with short metastases-free interval, multiple bone metastases sites, high serum lactic dehydrogenase levels, and treatedwith radiotherapy or chemotherapy alone had significantly worse outcomes. Patients were stratified into three different risk groupsbased on the number of adverse factors present. The OMS curves of the three groups were all significantly different (p<0.001). Conclusion: Severl prognostic factors were found to be associated with worse outcomes. According to the number of adverse factorspresent, bone-only metastasis patients can be stratified into three risk groups with significantly different prognoses. Suchgrouping may help in improving the design of clinical trials and in guiding individualized treatment for NPC patients with boneonlymetastasis.

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