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er related tests as well as the examination of primary tumors should be carried out as soon as possible. Prostatic sarcoma (PS) is a very rare malignant tumor that accounts for 0.1% of prostate malignancies, and Ewing's sarcoma is an extremely rare form of PS. We reported on a 64-year-old patient with PS and a 36-year-old patient with Ewing's sarcoma, both of whom were examined by contrast-enhanced ultrasonography (CEUS) before surgery. The 2 cases were proven to be prostatic stromal sarcoma, which was confirmed by imaging manif