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Abstract
Original Article
Winter-onset acute hypersensitivity pneumonitis, summer-onset acute hypersensitivity pneumonitis, and antigen avoidance
Yasutaka Onishia Tetsuji Kawamuraa Takanori Higashinob Ryota Kominamia Katsuya Hiranoa Ryota Hiraokaa Shoma Mizunoa Hiroaki Tsukamotoa Shin Sasakia Yasuharu Nakaharaa
aDepartment of Respiratory Medicine, National Organization Himeji Medical Center
bDepartment of Radiology, National Organization Himeji Medical Center
ABSTRACT
Depending on the season, the etiologies of hypersensitivity pneumonitis (HP) tend to vary. To investigate the clinical characteristics of winter-onset acute hypersensitivity pneumonitis (W-AHP), we compared 13 cases of W-AHP with 19 cases of summer-onset acute hypersensitivity pneumonitis (S-AHP). We retrospectively examined their pathogenesis, clinicoradiological findings, and presence or absence of recurrence after antigen avoidance. The causes that led to HP were as follows: six cases of ventilator-associated HP; three cases of home-associated HP (including summer-type HP); two cases of bird-related HP, and two cases of hot tub lung. There was a higher proportion of men among the W-AHP patients than women, and the mean age of the patients’ houses was lower in that group than among S-AHP patients. Lastly, no recurrence was observed in patients who achieved total antigen exposure avoidance.
KEYWORDS
Hypersensitivity pneumonitis Humidifier lung Ventilation pneumonitis Bird-breeder’s lung Antigen avoidance
Received 15 Jul 2020 ／ Accepted 31 Aug 2020
AJRS, 9(6): 425-431, 2020
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