患者，男,65岁。近期感排尿费力，夜尿次数增多伴下腹胀痛。直肠指诊发现前列腺增大，前列腺特异性 抗原测定20ng/ml。首先应考虑的诊断是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29037' and id < 2364038 and id<>'2364038' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29037' and id > 2364038 and id<>'2364038' order by id asc limit 5