Three cases of allergic bronchopulmonary mycosis due to Schizophyllum commune

We report 3 cases of allergic bronchopulmonary mycosis (ABPM) due to Schizophyllum commune. The first patient, an 82-year-old woman, presented with atelectasis of the left upper lobe with mucoid impaction due to Schizophyllum commune. The second patient, a 53-year-old woman, presented with atelectasis of the right middle lobe with mucoid impaction due to Schizophyllum commune. The last patient, a 49-year-old woman, underwent a left lingular lobectomy with a diagnosis of lung abscess, but the diagnosis was retrospectively changed to ABPM in a later review of the findings of the surgical specimens. The diagnosis and treatment of ABPM are not well defined, and this considerably delayed our diagnosis in these three cases. We hope to establish a more definitive diagnosis and treatment for ABPM through ongoing encounters with patients.