Spontaneous perirenal hemorrhage in systemic lupus erythematosus: a rare case report and literature review.

backgroundSpontaneous perirenal hemorrhage is relatively uncommon but may be life-threatening. There are some challenges in early diagnosis due to the lack of specific presentations. CASE PRESENTATION: We report a case of spontaneous perirenal hemorrhage in a newly diagnosed systemic lupus erythematosus patient who initially presented with non-specific flank pain. Weakness and unstable vital signs were noted on admission. Abdominal ultrasonography and computed tomography revealed a sizable perirenal hematoma over the left retroperitoneal cavity. Renal arteriography identified active extravasation of contrast media from a distant branch of the left renal artery, and selective embolization effectively obliterated the bleeding spot. After cessation of bleeding, the patient received intensive immunosuppressive therapy for acute kidney injury and encephalopathy due to lupus. Her mental status recovered successfully, and she was withdrawn from short-term hemodialysis.

conclusionsSpontaneous perirenal hemorrhage in the condition of systemic lupus erythematosus was a rare clinical entity with life-threatening potential. Early accurate diagnosis of spontaneous renal hemorrhage requires both detailed clinical examination and radiologic studies. Interventional embolization is essential and effective for both diagnosis and treatment. A high index of suspicion is necessary to avoid missing this potentially fatal syndrome, especially in patients with an increased risk of bleeding.