患者男,72岁,因“间断肉眼血尿并左侧腰腹部胀痛2周”入院。体检:患者生命体征平稳,心肺阴性,左侧腹部压痛,未触及明显腹部包块,左肾区叩痛,膀胱不充盈,以血尿待查收入院。B超检查提示左肾盂及输尿管轻度扩张,输尿管血凝块可能。行抗炎止血治疗,肉眼血尿消失,腹痛减轻,泌尿系CT检查提示左肾盂占位病变可能,行双肾CT增强提示左肾盂癌可能(图1)。拟行输尿管镜检查并取活检,但因输尿管内凝血块堵塞,输尿管 The patient, male, aged 72, was hospitalized for “intermittent gross hematuria and 2 weeks of left-sided abdominal pain”. Physical examination: patients with stable vital signs, heart and lung-negative, left abdominal tenderness, did not reach the obvious abdominal mass, the left kidney area percussion pain, bladder filling, to be admitted to hospital for hematuria pending investigation. B-ultrasound prompted a slight expansion of the left renal pelvis and ureter, ureteral blood clots may. Line anti-inflammatory hemostatic treatment, disappearance of gross hematuria, abdominal pain, urinary tract CT examination prompted the possibility of lesions in the left renal pelvis, line renal CT enhancement prompted the possibility of left renal pelvis (Figure 1). Ureteroscopy and biopsy to be performed, but blocked ureter clot, ureter