Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Prostate Cancer ?
    ### Response:
    Surgery is a common treatment for early stage prostate cancer. It is used to remove the cancer. The surgeon may remove the entire prostate -- a type of surgery called radical prostatectomy -- or, in some cases, remove only part of it. Sometimes the surgeon will also remove nearby lymph nodes.
    