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Expression of MTH1 in osteosarcoma and the corresponding adjacent tissues detected by immunohistochemical staining (magnification, ×200). (a, b) Positive expression of MTH1 in osteosarcoma tissues. (c) Negative expression of MTH1 in osteosarcoma tissues. (d) Negative expression of MTH1 in the corresponding adjacent tissues. The arrows in (a, b) represent positive expression and the arrows in (c, d) represent negative expression.
