患者男，46岁，主因腰痛伴尿频、排尿困难上月伴少量血尿20天而来院就诊。门诊查体无阳性发现，故做超声检查。使用Acuson－128－cp／10超声仪，3．SMHz探头行腹部检查：双肾未见异常，膀脱充盈尚可，内膜清晰，前列腺4．scmX3·7cmX3·Zcm，轮廓不规整，内为点片状欠均匀回声 Male patient, 46 years old, mainly due to low back pain with frequent urination, dysuria last month with a small amount of hematuria 20 days to hospital. Outpatient examination no positive findings, so do ultrasound. Use Acuson-128-cp / 10 system, 3. SMHz probe line abdominal examination: no abnormalities in the kidneys, bladder filling is acceptable, endometrial clear, prostate 4. scmX3 · 7cmX3 · Zcm, irregular contour, within the film-shaped due to less uniform echo