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Metastases to prostatic cancer: X-ray film of the male pelvis showing secondary bone tumours (metastases) caused by a primary tumour of the prostate. The metastases appear as the dense, white lumbar vertebrae (spinal bones) & the white patches over the pelvis. Carcinoma of the prostate typically affects elderly men. The prostate is an accessory male sex gland, opening into the urethra below the bladder & vas deferens. It secretes an alkaline fluid that forms part of semen released during ejaculation. The prostate may become enlarged with increasing age, causing obstruction to the neck of the bladder & impairing urination.
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