Successful flow reduction treatment for a middle cerebral artery aneurysm in a patient with systemic lupus erythematosus.

A 37-year-old male with a 20-year history of systemic lupus erythematosus (SLE) was referred to our hospital for an unruptured right middle cerebral artery (MCA) aneurysm. Right cerebral angiography detected a saccular aneurysm (9.6 × 7.1 mm) arising from the bifurcation of the right MCA, and a dilatation of the inferior trunk M2 in which three small branches were involved. The MCA aneurysm was treated with neck clipping. The aneurysmal dilatation of the inferior trunk M2 was treated with proximal clipping, followed by double superficial temporal artery-MCA anastomosis. The patient was discharged from our hospital without complications. This is an extremely unusual case of surgical flow reduction treatment using bypass surgery for a complicated cerebral aneurysm in a patient with SLE.