病例男，15岁，突发无痛全程肉眼血尿，伴尿急尿频1天。双肾无叩痛，耻骨联合上有压痛。B超检查见膀优内直径为2（kYllt之强回声光团，边界不规则，无声影，随体位移动，诊为膀眈血凝块（图1）。CT检查膀跳后壁偏左见向腔内突出、宽基底等密度软组织块，表面不光滑，约2（hax15 Case of male, 15 years old, sudden painless whole blood hematuria, urgency urinary frequency 1 day. Kidney without percussion pain, pubic symphysis have tenderness. B ultrasound examination to see the bladder excellent internal diameter of 2 (kYllt the strong echo light group, the boundary irregular, silent shadow, with the displacement of the body, diagnosed as blood clots (Figure 1) .CT check the posterior wall of the bladder jump left See protruding to the cavity, a wide base of soft tissue mass density, the surface is not smooth, about 2 (hax15