title: Resection of a ruptured mature cystic teratoma diagnosed two years after the onset of perforation.
abstract: Perforated cystic teratomas are rare. Our patient was a 16-year-old female who presented with severe chest pain two years ago. A right-sided pleural effusion was accidentally detected by chest radiography performed at her school. Computed tomography revealed a high density area with multiple small, thickened, lobulated lesions and a low density area with pleural effusion adjacent to a thinned wall. Pathognomonic inhomogeneous computed tomography findings led to an accurate diagnosis of a mature teratoma that had ruptured long before presentation. Thoracoscopic resection was performed, and the final histological diagnosis was a mature teratoma with partial rupture.
authors.affiliation: Division of General Thoracic Surgery, National Hospital Organization, Ibarakihigashi National Hospital, 825 Terunuma, Tokai-mura, Naka-gun, Ibaraki 319-1113, Japan. h-kuroda@aichi-cc.jp.
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kuroda
authors.forename: Toshinori
authors.initials: T
authors.lastname: Hashidume
authors.forename: Masaoki
authors.initials: M
authors.lastname: Shimanouchi
authors.forename: Yukinori
authors.initials: Y
authors.lastname: Sakao
mesh_terms: D000293:Adolescent; D005260:Female; D006801:Humans; D008479:Mediastinal Neoplasms / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D016066:Pleural Effusion, Malignant / Q000000981:diagnostic imaging / Q000209:etiology*; D012422:Rupture, Spontaneous; D013724:Teratoma / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery*; D013906:Thoracoscopy; D014057:Tomography, X-Ray Computed