title: Pulmonary inflammatory pseudotumor observed by bronchoscopy and resected using video-assisted thoracic surgery.
abstract: Pulmonary inflammatory pseudotumor is rare. A 34-year-old woman visited our hospital due to an abnormal chest shadow. Computed tomograhy showed a nodule in the right upper lobe. Bronchoscopy showed a polypoid endobronchial nodule obstructing most of the orifice of B2a. The nodule was white, glossy, and smooth, and it seemed to be covered with bronchial mucosa. However, transbronchial biopsy could not facilitate a diagnosis. To obtain a definitive diagnosis, we performed lobectomy of the right upper lobe using video-assisted thoracic surgery and removed the nodule completely. The pathologic diagnosis made during surgery was inflammatory pseudotumor. Immunohistochemical examination showed proliferating spindle cells were positive for vimentin and smooth muscle actin, but negative for epithelial markers. These findings were consistent with the staining pattern of inflammatory pseudotumor previously reported. Careful follow-up is necessary to detect any sign of local recurrence and distant metastases.
authors: Department of Surgery, Keiyu Hospital, 3-7-3 Minatomirai, Nishi-ku, Yokohama, Kanagawa, 220-0012, Japan. yus_naka@yahoo.co.jp
authors: Yusuke
authors: Y
authors: Nakamura
authors: Masayuki
authors: M
authors: Iwazaki
authors: Rinako
authors: R
authors: Watanabe
authors: Hisayo
authors: H
authors: Isono
authors: Ryota
authors: R
authors: Masuda
authors: Teiko
authors: T
authors: Sato
authors: Matakiti
authors: M
authors: Miyamoto
authors: Akihiko
authors: A
authors: Shimada
mesh_terms: D000328:Adult; D001980:Bronchi / Q000473:pathology; D001995:Bronchography; D001999:Bronchoscopy; D005260:Female; D006801:Humans; D016726:Plasma Cell Granuloma, Pulmonary / Q000175:diagnosis / Q000601:surgery*; D020775:Thoracic Surgery, Video-Assisted