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Esophageal motility was studied in 37 patients with progressive systemic sclerosis (PSS), 12 patients with mixed connective tissue disease (MCTD) and 40 controls by the manometry method, using an open tube and continuous perfusion, and by radiological examination. Radiology was normal in 17 patients with PSS and five patients with MCTD, and abnormal in 15 patients with PSS and three with MCTD. The most frequent abnormality was slow transit time of barium. Manometry of the esophageal body was normal in 20 patients with PSS and six patients with MCTD, and abnormal in 17 patients with PSS and six with MCTD. Lack of contraction in the middle lower segments of the esophagus was the abnormality most frequently observed. Lower esophageal sphincter pressure was significantly lower among patients with PSS and MCTD than among the controls. Dysphagia was reported by ten patients with PSS and by six patients with MCTD. Radiology and manometry showed similar changes in PSS and MCTD, but dysphagia was more frequent among patients with MCTD.
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