Large intratumoral pseudoaneurysm in a patient with bleeding renal angiomyolipoma

Angiomyolipoma [AML] is the most common benign renal tumor. It is composed of an abnormal collection of 3 primary components: unusual abdominal blood vessels, clusters of adipocytes and sheets of smooth muscle. CT is the preferred imaging technique for diagnosing and characterizing AMLs. AMLs typically have a benign course, but patients occasionally present with complications, such as sudden pain or hypotension secondary to spontaneous hemorrhage in the tumor. If the patient is symptomatic, the tumor grows rapidly or is >4 cm, angiography and selective arterial embolization or renal-sparing surgical excisions of the tumor are the treatment of choice. Patients with AMLs treated with embolization generally have a favorable outcome

Embolization for hemorrhagic multiple intrarenal microaneurysms following percutaneous renal biopsy in a patient with systemic lupus erthematosus

Although patients with systemic lupus erythematosus [SLE] have a high incidence of arterial and venous thrombotic manifestations, intrarenal microaneurysms have been quite rarely reported in these patients, and are probably unrecognized. We report a case of SLE which was complicated with huge retroperitoneal hemorrhage due to rupture of pseudoaneurysm following renal biopsy, associated with multiple microaneurysms. On angiography, multiple microaneurysms of the intralobular arteries and bleeding from the lower pole renal pseudoaneurysm were seen, which was embolized with gel foam. This case represents an unusual presentation of SLE