下腔静脉梗阻累及肾脏可产生血尿、蛋白尿,但突发大量血尿,肾包膜下积液少见,本文报告1例。男性患者,37岁。因间断肉限血尿3年,右腰部疼痛,血尿加重伴血块2天来诊。发病初期,患者曾在当地医院行腹部B超检查,KUB,IVP,膀胱镜及逆行肾盂造影均未发现异常。2天前突然出现右腰部疼痛,肉眼血尿伴血块,疼痛向右下腹 Inferior vena cava obstruction affects the kidneys can produce hematuria, proteinuria, but a large number of sudden hematuria, renal subcapsular effusion is rare, this article reports 1 case. Male patient, 37 years old. Due to intermittent meat limited hematuria 3 years, right lower back pain, hematuria increased with blood clots 2 days to diagnosis. Early onset, the patient had abdominal biopsies in the local hospital, KUB, IVP, cystoscopy and retrograde pyelography were found no abnormalities. 2 days ago suddenly appeared right lower back pain, gross hematuria with blood clots, pain to the right lower quadrant