title: Hypersensitivity pneumonitis associated with inhalation of catechin-rich green tea extracts.
abstract: A 51-year-old man presented with fever and fatigue after 3.5 months of antituberculosis therapy. High-resolution computed tomography of his chest revealed new ground-glass opacities and poorly defined centrilobular nodules. He had undergone catechin inhalation for 1 month. We diagnosed hypersensitivity pneumonitis (HP) based on the clinical course, bronchoscopy and a challenge test. Cases of HP due to inhalation of extracted catechin powder are rare. Although it has many known positive attributes, it is necessary to be aware that catechin can cause HP.
authors: Department of Respiratory Medicine, Nishi-Kobe Medical Center, Kobe, Japan. h.ohtera@nmc-kobe.org
authors: Hiroshi
authors: H
authors: Otera
authors: Kimihide
authors: K
authors: Tada
authors: Toshiyasu
authors: T
authors: Sakurai
authors: Kimio
authors: K
authors: Hashimoto
authors: Akihiko
authors: A
authors: Ikeda
mesh_terms: D000280:Administration, Inhalation; D000542:Alveolitis, Extrinsic Allergic / Q000000981:diagnostic imaging / Q000209:etiology* / Q000276:immunology; D028241:Camellia sinensis / Q000009:adverse effects / Q000276:immunology*; D002392:Catechin / Q000009:adverse effects / Q000276:immunology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013662:Tea / Q000009:adverse effects / Q000276:immunology*
chemical_list: D013662:Tea; D002392:Catechin