What is the role of imaging studies in the workup of mold- related extrinsic allergic alveolitis?

Updated: Sep 18, 2017
  • Author: Shih-Wen Huang, MD; Chief Editor: Harumi Jyonouchi, MD  more...
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Answer

A widespread ground-glass appearance or an alveolar filling pattern, particularly in the lower and middle zones, can be seen on a chest radiograph when the disease is moderately severe. The lesions may resolve after exposure ceases. If exposure continues, a nodular pattern or honeycombing may develop. When the upper zone is affected, it manifests as irreversible fibrosis.

In subacute cases, CT scans reveal reticular or nodular infiltration in parenchyma. In chronic cases, a similar pattern of fibrosis can be seen throughout the lung fields. Expiratory images may reveal patchy areas of increased lucency, indicating airtrapping.


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