男性，63岁。发现左侧阴囊内有逐渐增大 的无痛包块2个月。查体触不到左侧睾丸 及附睾。为进一步明确诊断，首先采取的 检查方法是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='32570' and id < 2588876 and id<>'2588876' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='32570' and id > 2588876 and id<>'2588876' order by id asc limit 5