title: Endobronchial involvement of mantle cell lymphoma: A case report.
abstract: Mantle cell lymphoma (MCL) is a subtype of B-cell non-Hodgkin's lymphoma. Most cases of MCL have extranodal involvement at the time of the initial diagnosis; however, endobronchial involvement is rare. An 87-year-old man was referred to our hospital because of dyspnea on exertion. A chest CT revealed diffuse irregular wall thickening of the trachea and bilateral bronchi. A bronchoscopy revealed a diffuse irregular surface of the tracheal and bilateral bronchial mucosa and polyposis-like lesions. He was diagnosed as having MCL based on an endobronchial biopsy, and the diagnosis was confirmed using immunohistochemical staining.
authors.affiliation: Department of Respiratory Medicine, School of Medicine, Kitasato University, Kanagawa, Japan.
authors.forename: Ken
authors.initials: K
authors.lastname: Katono
authors.affiliation: Department of Respiratory Medicine, School of Medicine, Kitasato University, Kanagawa, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Shirasawa
authors.affiliation: Department of Respiratory Medicine, School of Medicine, Kitasato University, Kanagawa, Japan.
authors.forename: Shinya
authors.initials: S
authors.lastname: Harada
authors.affiliation: Department of Respiratory Medicine, School of Medicine, Kitasato University, Kanagawa, Japan.
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Niwa
authors.affiliation: Department of Respiratory Medicine, School of Medicine, Kitasato University, Kanagawa, Japan.
authors.forename: Yoshiro
authors.initials: Y
authors.lastname: Nakahara
authors.affiliation: Department of Respiratory Medicine, School of Medicine, Kitasato University, Kanagawa, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Igawa
authors.affiliation: Department of Respiratory Medicine, School of Medicine, Kitasato University, Kanagawa, Japan.
authors.forename: Masanori
authors.initials: M
authors.lastname: Yokoba
authors.affiliation: Department of Respiratory Medicine, School of Medicine, Kitasato University, Kanagawa, Japan.
authors.forename: Masaru
authors.initials: M
authors.lastname: Kubota
authors.affiliation: Department of Respiratory Medicine, School of Medicine, Kitasato University, Kanagawa, Japan.
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Masuda
keywords: Bronchoscopy; Endobronchial biopsy; Endobronchial involvement; Mantle cell lymphoma