What is the role of gas exchange in the diagnosis of eosinophilic granuloma (histiocytosis X)?

Updated: Mar 29, 2018
  • Author: Eleanor M Summerhill, MD, FACP, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Gas exchange abnormalities may be present at rest. Although such abnormalities are most pronounced with exercise, most patients have a normal gradient of alveolar-arterial partial pressures.

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