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Case of summer-type hypersensitivity pneumonitis complicated with IgA nephropathy
  1. Tomoki Maetani,
  2. Hiroshi Shima,
  3. Yusuke Shiraishi and
  4. Satoshi Marumo
  1. Respiratory Disease Center, Tazuke Kofukai Foundation, Medical Research Institute, Kitano Hospital, Osaka, Japan
  1. Correspondence to Dr Satoshi Marumo, marumosatoshi{at}


Association between pulmonary disease and IgA nephropathy (IgAN) has been previously reported. However, no association has been reported between hypersensitivity pneumonitis (HP) and IgAN. Here, we report about a patient with no particular medical history, who experienced worsening dyspnoea in the course of 1 month, with ground-glass opacity on chest CT and no improvement after antibiotic therapy. The patient was diagnosed as having HP based on the history of antigen exposure, detection of Trichosporon asahii-specific antibodies and bronchoscopy findings. Concomitantly, findings of renal biopsy revealed the IgAN diagnosis. The patient underwent corticosteroid therapy, with good outcomes for both HP and IgAN. This is the first report in the literature to describe summer-type HP complicated with IgAN.

  • interstitial lung disease
  • proteinurea
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  • Contributors TM was involved in data collection, analysis, interpretation and manuscript writing. HS and YS supervised TM during admission. SM supervised the paper. All authors read and approved the final manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Patient consent for publication Obtained.

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