The os trigonum is an accessory bone of the foot, locates at the posterolateral tubercle of the talus, and occures in about 7% of population.

摘要三角骨位于距骨后外侧节，是脚属骨一，出现于百分七正常人中。

Methods 103 cases with bladder neoplasm in trigonum vesicae or cervix vesicae were detected and were divided into stages by transrectal ultrasound and transadominal ultrasound.

方法应肠超声及腹壁超声对103例生长于膀胱三角区及颈膀胱肿瘤进行对比观察并分期。