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多年来医生们都在敦促40岁以上的男人应进行摄护腺检查;这种包括手操直肠检查的程序只用很短的时间。但这种检查方法有时查不出肿瘤,尤其是在肿瘤很小的时候。但早期发现摄护腺肿瘤至关重要,因为到肿瘤已经大到容易发觉时,癌症已经扩散到骨头里。现在作为一种可供选用的办法,有些医生已转向于利用超声进行诊断,宣称用超声方法常可以检查出在常规直肠检查时被漏掉的小肿瘤。不过,超声的批评者认为,用超声检查虽然可能有助于确定肿瘤的大小,但它的诊断效用还证明优于直肠检查。他们认为,超声检查往往由放射
For many years, doctors have urged men over the age of 40 to undergo a prostate examination; this procedure, including manual rectal examination, takes only a short time. However, this type of examination sometimes fails to detect tumors, especially when the tumor is very small. But early detection of prostate tumors is critical because cancer has spread to the bone when the tumor is large enough to be easily detected. Now as an alternative, some doctors have turned to the use of ultrasound for diagnosis, claiming that ultrasound can often detect small tumors that are missed during routine rectal examination. However, ultrasound critics believe that although the use of ultrasound may help determine the size of the tumor, its diagnostic utility also proves to be superior to rectal examination. In their opinion, ultrasound examination often consists of radiation.