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The British Journal of Rheumatology, Vol 37, 1011-1014, Copyright © 1998 by British Society for Rheumatology

ORIGINAL PAPERS

Air oesophagogram: a frequent, but not a specific sign of oesophageal involvement in connective tissue diseases

G Lock, M Strotzer, RH Straub, J Scholmerich, S Feuerbach, A Holstege and B Lang
Department of Internal Medicine I, University of Regensburg, Germany.

OBJECTIVE: This study investigates the role of the air oesophagogram in conventional chest X-rays for the diagnosis of oesophageal dysmotility in patients with connective tissue diseases. METHODS: Fifty-one patients with connective tissue diseases were studied by oesophageal manometry and lateral and posterior-anterior chest X-rays. The presence or absence of oesophageal air on chest X-rays were evaluated separately in the upper, middle and distal segment of the oesophagus. Forty-seven chest X-rays of patients without connective tissue diseases, who had undergone manometry for the evaluation of oesophagus-related symptoms and who had normal oesophageal function, were analysed as a control. RESULTS: A total of 23/51 patients with connective tissue diseases showed oesophageal dysfunction in manometry; 16/51 patients (31%) had air in two or more oesophageal segments on the lateral chest X-ray. There was a significant association of manometrically proven oesophageal dysmotility and air in two or three oesophageal segments (P < 0.05; sensitivity 48%, specificity 82%). However, the prevalence of an air oesophagogram showed no significant difference between patients with connective tissue diseases and the control group (10/47; 21%). CONCLUSION: The radiological sign of an air oesophagogram is neither sensitive nor specific enough to omit oesophageal motility studies in patients with connective tissue diseases.
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