What is the role of BAL in the workup of mold-related allergic bronchopulmonary aspergillosis (ABPA) and allergic bronchopulmonary mycosis (ABPM)?

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

One report indicated the bronchial alveolar lavage (BAL) typically reveals bronchial lymphocytosis with increased CD8+ T cells in patients with hypersensitive pneumonitis. [22] Lymphocyte counts from 30% to more than 50% are common. BAL fluid with less than 30% lymphocytes should put the diagnosis of hypersensitivity pneumonitis in question.


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