The radiological appearances in twenty-five patients with Reiter's disease have been compared with those in eighty-one with rheumatoid arthritis and thirty-eight with ankylosing spondylitis. The similarities and differences have been analysed. Changes of periosteal new bone in the calcaneum appear to be the only significant differentiating factor, although minor differences in incidence and distribution occur elsewhere. Sacro-iliitis is a common radiological feature of long-standing Reiter's disease.
SUMMARYA case is reported of a pneumopericardium in a 69-yearold woman caused by the rupture into the pericardium of a gastric ulcer situated in a hiatus hernia. Gastrografin studies were used to confirm the diagnosis and her initial conservative management was successful. However, she died at the operation to close her fistula, probably largely as a result of multiple unsuspected pulmonary emboli compounding her acid pericarditis.
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