“…MR angiography has detected increasing numbers of cerebral aneurysms in patients with collagen diseases, with a total of 48 cases reported up to September 2008, including 25 patients with systemic lupus erythematosus, 1,10,11,14,18-20,22,25,27,30-33,37,42, 43,52) 16 patients with polyarteritis nodosa, 2,8,9,24,28,29,35,36,41,44,45,[49][50][51] 5 patients with scleroderma, 3,17) and 2 patients with CREST syndrome. 38,56) To determine the specific features of cerebral aneurysm in patients with collagen diseases, we reviewed the 48 reported cases and identified the following four characteristics.…”