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September 1996

Radiological Case of the Month

Author Affiliations

From the Department of Radiology, Hôpital d'Enfants (Drs Hoeffel, Arnould, and Gaucher), and the Department of Pathology, Hôpital de Brabois (Drs Grignon and Galloy), Nancy, France; and the Department of Radiology, Childrens Hospital Los Angeles, Calif (Dr Wood).

Arch Pediatr Adolesc Med. 1996;150(9):991-992. doi:10.1001/archpedi.1996.02170340105019

A HEALTHY 10-year-old boy had painless, progressive thoracic scoliosis for several years. Computed tomography was performed to evaluate the severity of scoliosis (Figure 1 and Figure 2). The computed tomographic scan was followed by a magnetic resonance imaging study (Figure 3).

Denouement and Discussion  Unusual Radiological Appearance of a Mediastinal Teratoma in ChildhoodThe well-circumscribed appearance and the extensive calcification of the mass are not indicative of a lymphangioma, which infiltrates the mediastinum, and bronchogenic cysts do not calcify. Neuroblastomas calcify, but they originate in the posterior mediastinum and are rarely cystic. The presumptive diagnosis was a teratoma in an unusual location. Resection of the mass went well because of the lack of adhesions and tissue infiltration. A histopathologic examination revealed a mature encapsulated teratoma measuring 9.5×9.5×8 cm; the teratoma had multiple plical structures and contained a thick yellow material. A histological study showed multiple mature tissues.Mediastinal teratomas account