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Polish discus thrower Piotr Malachowski talks about donating the silver medal he won at the 2016 Rio Olympics to help three-year-old Olek Szymanski - who has retinoblastoma, a rare form of cancer - to go to New York for treatment.

Photo (L) Olek Szymanski who is receiving treatment for a rare form of cancer in New York (R) Piotr Malachowski celebrates winning silver in Rio Credit: Facebook / Getty Images