Radiologic amyl nitrite test for distinguishing pseudoachalasia from idiopathic achalasia

W. J. Dodds, E. T. Stewart, S. M. Kishk, P. J. Kahrilas, W. J. Hogan

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

In a simple radiologic test, amyl nitrite inhalation seems to distinguish patients with pseudoachalasia from those with idiopathic achalasia. In three pseudoachalasia patients with tumor infiltration of the distal esophagus, the narrow lower esophageal sphincter segment was unaffected by the smooth-muscle relaxant effect of amyl nitrite. In contrast, amyl nitrite caused a measurable increase of 2 mm or more in sphincter diameter in nine patients with idiopathic achalasia. The amyl nitrite test may be a useful method for distinguishing patients with pseudoachalasia from those with idiopathic achalasia.

Original languageEnglish (US)
Pages (from-to)21-23
Number of pages3
JournalAmerican Journal of Roentgenology
Volume146
Issue number1
DOIs
StatePublished - Jan 1 1986

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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