“…This complication has also been reported in scleroderma (Kibler and Rose, 1960). Histologically, the arterial lesions in the case described resembled those of polyarteritis nodosa, in which intestinal perforation occurs not uncommonly (Friedman, Schwartz, Truben and Steinbrocker, 1953;Rabinovitch and Rabinovitch, 1954;McKeown and Ganguli, 1956). However, this patient had classical rheumatoid arthritis and it is known that the necrotising arteritis of rheumatoid arthritis may closely simulate the vascular lesions of polyarteritis nodosa, although the necrosis is usually less severe and aneurysm formation is said never to occur (Cruikshank, 1954).…”