title: Life-threatening and Rapidly Growing Teratoma in the Anterior Mediastinum.
abstract: This report describes the case of a 23-year-old man with a mediastinal teratoma. Five months before admission, a chest radiograph during a routine health checkup was normal. Four months before admission, the patient developed sudden onset of mild right-sided chest pain. He gradually developed dyspnea and was admitted to our hospital. Computed tomography revealed a giant tumor that was markedly compressing the right atrium. Urgent surgery was performed, and a ruptured, benign mature teratoma was diagnosed. Mature mediastinal teratomas are benign tumors, but they can rupture and have the potential to grow rapidly, potentially leading to life-threatening complications.
authors.affiliation: Department of Internal Medicine, National Hospital Organization Kinki-chuo Chest Medical Center, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Omachi
authors.forename: Tomoya
authors.initials: T
authors.lastname: Kawaguchi
authors.forename: Shigeki
authors.initials: S
authors.lastname: Shimizu
authors.forename: Tomohisa
authors.initials: T
authors.lastname: Okuma
authors.forename: Masanori
authors.initials: M
authors.lastname: Kitaichi
authors.forename: Shinji
authors.initials: S
authors.lastname: Atagi
authors.forename: Hyung-Eun
authors.initials: HE
authors.lastname: Yoon
authors.forename: Akihide
authors.initials: A
authors.lastname: Matsumura
mesh_terms: D000328:Adult; D002637:Chest Pain / Q000209:etiology*; D004417:Dyspnea / Q000209:etiology*; D006325:Heart Atria / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D008297:Male; D008479:Mediastinal Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D008482:Mediastinum / Q000000981:diagnostic imaging / Q000473:pathology*; D012422:Rupture, Spontaneous / Q000000981:diagnostic imaging; D013724:Teratoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome