The prognostic role of CD133 expression in patients with osteosarcoma.

Osteosarcoma (OS), a malignant bone tumor, mainly occurs in adolescents. Cluster of differentiation 133 (CD133) is one of the most common tumor stem cell biomarkers. The prognostic significance of CD133 in OS has been reported, while the conclusions of these study were inconsistent. This study was conducted to investigate the association between CD133 expression and OS. We performed a search using several database including NCBI PubMed, Springer, CNKI, Web of Science and Wanfang for relevant papers about the prognostic value of CD133 on OS published before October 19, 2019. Pooled odds ratio (OR) and 95% CI were used to evaluate the outcomes. Seven reports including 498 OS patients were used for evaluating the association between CD133 positive expression and OS clinicopathological features. CD133 positive expression was not related to the age, gender, tumor size, tumor location and pathological type of OS. The expression of CD133 was significantly associated with high ennecking stage of OS (OR 9.67, 95% CI 5.56-16.80, P < 0.05) and OS local recurrence (OR 3.02, 95% CI 1.84-4.94, P < 0.05). In addition, the expressions of CD133 predict metastasis (OR 7.64, 95% CI 4.93-11.85, P < 0.05). Moreover, this study indicated that CD133 expression was correlated to lower 5-year overall survival in OS with the pooled OR of 5.85 (95% CI 3.30-10.37, P < 0.05). Our reported shown that positive expression of CD133 is significantly correlated with ennecking stage, local recurrence, metastasis and low 5-year overall survival rate of OS patients.