Humidifier-Related Lung Injury Leading to Hypersensitivity Pneumonitis: A Case Report.

Humidifier lung is a subtype of hypersensitivity pneumonitis (HP) triggered by repeated exposure to an antigen. The mainstay of therapy is antigen avoidance. A Caucasian male in his 30s presented with a six-month history of progressively worsening dyspnea and cough.