title: [Metastatic Lung Tumor Diagnosed as Primary Lung Cancer due to its Accompanying Lesion Mimicking Atypical Adenomatous Hyperplasia by Intraoperative Needle Biopsy Findings;Report of a Case].
abstract: We reported a case of metastatic lung tumor, which was suspected as being a primary lung cancer because of its accompanying lesion mimicking atypical adenomatous hyperplasia(AAH) based on intraoperative needle biopsy findings. AAH is a preinvasive lesion or marginal lesion of primary lung cancer that is not accompanied by metastatic tumor. However, it needs to be distinguished pathologically from secondary changes of inflammation or fibrosis. In our case, the needle biopsy revealed AAH-like pathological findings, which indicates a primary lung cancer, and the standard lobectomy with lymph node dissection was performed, however, the final diagnosis turned out to be metastatic tumor. The rapidly enlarging tumor led to surrounding obstructive pneumonitis, which may have caused pathological changes mimicking AAH findings. In the case of obstructive pneumonitis, we must be careful to diagnose AAH, in addition to decisions about the surgical procedure especially when based on frozen section diagnosis.
authors.affiliation: Department of General Thoracic Surgery, Kagoshima University, Kagoshima, Japan.
authors.forename: Aya
authors.initials: A
authors.lastname: Harada
authors.forename: Yui
authors.initials: Y
authors.lastname: Watanabe
authors.forename: Yukihito
authors.initials: Y
authors.lastname: Murakami
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Nagata
authors.forename: Go
authors.initials: G
authors.lastname: Kamimura
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Wakida
authors.forename: Masaya
authors.initials: M
authors.lastname: Aoki
authors.forename: Naoya
authors.initials: N
authors.lastname: Yokomakura
authors.forename: Kota
authors.initials: K
authors.lastname: Kariatsumari
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Nakamura
authors.forename: Tsubasa
authors.initials: T
authors.lastname: Hiraki
authors.forename: Masami
authors.initials: M
authors.lastname: Sato
mesh_terms: D001707:Biopsy, Needle; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006965:Hyperplasia / Q000175:diagnosis* / Q000473:pathology; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000556:secondary / Q000601:surgery; D008197:Lymph Node Excision; D008875:Middle Aged; D011013:Pneumonectomy; D012004:Rectal Neoplasms / Q000473:pathology; D014057:Tomography, X-Ray Computed