What is the role of pulmonary function testing in the diagnosis of eosinophilic granuloma (histiocytosis X)?

Updated: Sep 11, 2020
  • Author: Eleanor M Summerhill, MD, FACP, FCCP; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
  • Print

Pulmonary function testing in pulmonary Langerhans cell histiocytosis X (PLCH) patients can demonstrate all patterns of abnormality: Normal, restrictive, obstructive, or mixed. Most patients have normal or near-normal total lung capacity with near-normal spirometry findings. Gas exchange, as measured by the diffusing capacity for carbon monoxide, is generally reduced. In rare cases, patients have reversible airflow limitation.

Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!