title: Pulmonary artery intramural leiomyosarcoma mimicking pulmonary aneurysm.
abstract: Chest radiography indicated a well-defined rounded mass at the left lung hilum in a 77-year-old former smoker. Chest computed tomography revealed a longitudinal saccular enlargement of the left pulmonary artery with surrounding soft tissue opacity. Resection of the left lower lobe with segment 1 + 2c was carried out to completely remove the dilated pulmonary artery. The resected specimen revealed obvious dilatation of the interlobar pulmonary artery and its branches. A small yellowish well-demarcated myxoid tumor was contained in this lesion, which was diagnosed as a primary pulmonary artery intramural leiomyosarcoma.
authors.affiliation: Department of General Thoracic Surgery, Teikyo University School of Medicine, Itabashi, Tokyo, Japan.
authors.forename: Rie
authors.initials: R
authors.lastname: Kanaoka
authors.affiliation: Department of General Thoracic Surgery, Teikyo University School of Medicine, Itabashi, Tokyo, Japan yusuketakahashigts@gmail.com.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Takahashi
authors.affiliation: Department of Pathology, Teikyo University School of Medicine, Itabashi, Tokyo, Japan.
authors.forename: Shigeki
authors.initials: S
authors.lastname: Morita
authors.affiliation: Department of General Thoracic Surgery, Teikyo University School of Medicine, Itabashi, Tokyo, Japan.
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Dejima
authors.affiliation: Department of General Thoracic Surgery, Teikyo University School of Medicine, Itabashi, Tokyo, Japan.
authors.forename: Noriyuki
authors.initials: N
authors.lastname: Matsutani
authors.affiliation: Department of General Thoracic Surgery, Teikyo University School of Medicine, Itabashi, Tokyo, Japan.
authors.forename: Masafumi
authors.initials: M
authors.lastname: Kawamura
mesh_terms: D000368:Aged; D000783:Aneurysm / Q000175:diagnosis*; D001706:Biopsy; D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D006801:Humans; D007890:Leiomyosarcoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008175:Lung Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008297:Male; D011013:Pneumonectomy; D011237:Predictive Value of Tests; D011651:Pulmonary Artery / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D019043:Vascular Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery
keywords: Aneurysm; Diagnosis; Leiomyosarcoma; Pulmonary artery; Vascular neoplasms; differential; false