title: Endobronchial hamartoma as a cause of pneumonia.
abstract: BACKGROUND
  Post-obstructive pneumonia occurs in the presence of airway obstruction, usually caused by lung cancer. However, there are cases of bronchial obstruction due to benign origin such as foreign bodies and benign endobronchial tumors, which are often misdiagnosed.
  
  
  METHODS
  A 66-year-old man was referred to our hospital due to high fever with abnormal shadow in the right lung. Chest computed tomography after a course of antibiotic treatment showed an intra-bronchial tumor obstructing the right upper bronchus. Part of the tumor was removed with flexible bronchoscopy, and histopathological examination revealed cartilage tissue but not fat or other components. Lobectomy of the right upper lobe of the lung was performed to make a definite diagnosis and prevent recurrent obstructive pneumonia. The resected tumor contained mature cartilage and fat tissues, and was diagnosed as endobronchial hamartoma.
  
  
  CONCLUSIONS
  Benign endobronchial tumors such as hamartomas should be considered in the differential diagnosis of post-obstructive pneumonia.
authors.affiliation: Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Oguma
authors.affiliation: Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Hiroto
authors.initials: H
authors.lastname: Takiguchi
authors.affiliation: Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Kyoko
authors.initials: K
authors.lastname: Niimi
authors.affiliation: Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Hiromi
authors.initials: H
authors.lastname: Tomomatsu
authors.affiliation: Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Tomomatsu
authors.affiliation: Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Hayama
authors.affiliation: Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Aoki
authors.affiliation: Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Urano
authors.affiliation: Department of Pathology, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Natsuko
authors.initials: N
authors.lastname: Nakano
authors.affiliation: Department of Pathology, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Go
authors.initials: G
authors.lastname: Ogura
authors.affiliation: General Thoracic Surgery, Department of Surgery, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Tomoki
authors.initials: T
authors.lastname: Nakagawa
authors.affiliation: General Thoracic Surgery, Department of Surgery, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Ryota
authors.initials: R
authors.lastname: Masuda
authors.affiliation: General Thoracic Surgery, Department of Surgery, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Iwazaki
authors.affiliation: Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Abe
authors.affiliation: Division of Pulmonary Medicine, Department of Medicine, Tokai University School of Medicine, Kanagawa, Japan.
authors.forename: Koichiro
authors.initials: K
authors.lastname: Asano
mesh_terms: D000368:Aged; D001706:Biopsy; D001982:Bronchial Diseases / Q000150:complications / Q000175:diagnosis*; D001999:Bronchoscopy; D003937:Diagnosis, Differential; D006222:Hamartoma / Q000150:complications / Q000175:diagnosis*; D006801:Humans; D008297:Male; D011014:Pneumonia / Q000175:diagnosis / Q000209:etiology*; D014057:Tomography, X-Ray Computed