title: A case report: thoracic extramedullary hematopoiesis found by occurring spontaneous pneumothorax.
abstract: Extramedullary hematopoiesis (EMH) is a rare disease associated with hematologic disorders. This report describes a case of posterior mediastinal mass found by occurring spontaneous pneumothorax in a 48-year-old male. The intrathoracic mass resected using video-assisted thoracic surgery (VATS) was diagnosed thoracic EMH (TEMH). No disorders were found by hematologic exams before or after surgery. This report suggests that such lesions must therefore be considered in the differential diagnosis of posterior mediastinal tumors presenting with no hematologic disorders.
authors.affiliation: Division of Thoracic Surgery, Department of Surgery Nippon Medical School, Tokyo, Japan.
authors.forename: Hirotoshi
authors.initials: H
authors.lastname: Kubokura
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Koizumi
authors.forename: Naoyuki
authors.initials: N
authors.lastname: Yoshino
authors.forename: Shigeki
authors.initials: S
authors.lastname: Yamagishi
authors.forename: Iwao
authors.initials: I
authors.lastname: Mikami
authors.forename: Tomomi
authors.initials: T
authors.lastname: Hirata
authors.forename: Akima
authors.initials: A
authors.lastname: Harada
authors.forename: Masashi
authors.initials: M
authors.lastname: Kawamoto
authors.forename: Kazuo
authors.initials: K
authors.lastname: Shimizu
mesh_terms: D016063:Blood Loss, Surgical; D003937:Diagnosis, Differential; D006411:Hematopoiesis, Extramedullary; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008479:Mediastinal Neoplasms / Q000175:diagnosis*; D008482:Mediastinum / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D008875:Middle Aged; D011030:Pneumothorax / Q000000981:diagnostic imaging / Q000473:pathology*; D020775:Thoracic Surgery, Video-Assisted; D014057:Tomography, X-Ray Computed