title: Rapid enlargement of a mediastinal mass: thymoma hemorrhage into a thymic cyst.
abstract: A 52-year-old man was admitted to Matsudo City Hospital because of an anterior mediastinal mass. One month prior, when he suddenly suffered chest pain, computed tomography (CT) showed a 4 x 3 cm mass in the chest. On admission, the symptom disappeared. However, chest CT revealed rapid enlargement of the mass to 10 x 6 cm. Based on the CT findings, we suspected a tumor. Therefore, we performed a thymothymectomy. The mass, measuring 12 x 8 x 6 cm, contained a solid tumor and a fluid-filled cyst. Pathology showed a thymoma and a multilocular thymic cyst. We speculated that hemorrhage from the thymoma spread into the multilocular thymic cyst and enlarged the mass.
authors.affiliation: Department of Chest Surgery, Matsudo City Hospital, 4005 Kamihongo, Matsudo, Chiba 271-8511, Japan. taiki_ni_kiita@nifty.com
authors.forename: Taiki
authors.initials: T
authors.lastname: Fujiwara
authors.forename: Teruaki
authors.initials: T
authors.lastname: Mizobuchi
authors.forename: Masahiro
authors.initials: M
authors.lastname: Noro
authors.forename: Naomichi
authors.initials: N
authors.lastname: Iwai
mesh_terms: D006470:Hemorrhage / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D006801:Humans; D008297:Male; D008476:Mediastinal Cyst / Q000150:complications* / Q000473:pathology / Q000601:surgery; D008875:Middle Aged; D013934:Thymectomy; D013945:Thymoma / Q000150:complications* / Q000473:pathology / Q000601:surgery; D013953:Thymus Neoplasms / Q000150:complications* / Q000473:pathology / Q000601:surgery; D014057:Tomography, X-Ray Computed
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