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157571 Surgery

A 66 year old man develops low back pain, and radiologic investigations reveal multiple osteoblastic lesions of the lumbar veebrae. A hard, irregular nodule on the posterior surface of the prostate is appreciated on rectal examination. Plasma levels of prostatic specific antigen (PSA) are markedly increased. Which of the following is the most likely diagnosis?

AChronic prostatitis
BMultiple myeloma
CProstatic adenocarcinoma
DProstatic hyperplasia
Surgery
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