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Abstract
At routine examination the frequency of cancer of the prostate diagnosed or confirmed post mortem is about 20%. in a special investigation of 308 subjects the corresponding frequency was about 40%. the frequency of microscopic prostatic cancer increases with age and is about 44% in ages above 80 years. in the early stages the cancer grows mainly in the peripheral part of the prostae and no evidence of multifocal growth is available. the frequency of cancer in the perineural spaces and the extent of the growth in the prostate increase with age. Patients with cancer involvement of periurethral tissue in material obtained by electroresection or enucleation should be regarded as poor risks and as requiring treatment.