title: Pleuropulmonary blastoma in a young adult presenting as a ruptured cystic teratoma in radiology.
abstract: Pleuropulmonary blastoma (PPB) is a rare malignant dysontogenetic neoplasm primarily affecting children and is characterized histologically by a variably mixed blastematous and sarcomatous patterns. We herein report a very exceptional adult case of PPB. A 21-yr-old male patient presented with a left chest pain of two weeks' duration. A computed tomography scan revealed a large, multicystic tumor occupying the left lower hemithorax, leading to the impression of a ruptured mediastinal cystic teratoma. A thoracotomy for resection of the tumor was performed. On histologic examination, the tumor consisted of cystic walls and associated solid lesions which showed undifferentiated blastemal tissues with focal fibrosarcomatous and rhabdoid features. Immunohistochemically the tumor cells only showed diffuse strong positivity for vimentin. The histologic findings corresponded to a type II PPB. The authors suggest that PPB, especially of type I or II, should be included in the radiologic differential diagnosis of mediastinal cystic neoplasms in a young adult.
authors.affiliation: Department of Pathology, Pusan National University College of Medicine, Busan, Korea. cnlee@pusan.ac.kr
authors.forename: Chang Hun
authors.initials: CH
authors.lastname: Lee
authors.forename: Keun Il
authors.initials: KI
authors.lastname: Kim
authors.forename: Young Dae
authors.initials: YD
authors.lastname: Kim
authors.forename: Min Ki
authors.initials: MK
authors.lastname: Lee
authors.forename: Jee Yeon
authors.initials: JY
authors.lastname: Kim
authors.forename: Do Youn
authors.initials: DY
authors.lastname: Park
authors.forename: Mee Young
authors.initials: MY
authors.lastname: Sol
authors.forename: Kang Suek
authors.initials: KS
authors.lastname: Suh
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D006801:Humans; D007150:Immunohistochemistry; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D008297:Male; D018202:Pulmonary Blastoma / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000601:surgery; D013724:Teratoma / Q000175:diagnosis* / Q000000981:diagnostic imaging* / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014746:Vimentin / Q000096:biosynthesis
chemical_list: D014746:Vimentin