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Anterior mediastinal immature teratoma with precocious puberty in a child with Klinefelter syndrome.
J Formos Med Assoc
; 104(8): 601-4, 2005 Aug.
Article
in English
| MEDLINE
| ID: mdl-16193184
ABSTRACT
Klinefelter syndrome occurs in approximately 1 in 1000 males. A 4-year-old boy presented with precocious puberty and an anterior mediastinal mass. Serum alpha-fetoprotein and human chorionic gonadotropin levels were mildly increased. Computed tomography revealed a germ cell tumor (GCT) of the mediastinum. Complete resection of the tumor was performed. Histologic analysis revealed an immature teratoma. Males with Klinefelter syndrome develop GCTs at a rate 50 times higher than unaffected males. This case report calls attention to the need to rule out Klinefelter syndrome in boys who present with precocious puberty and a mediastinal GCT.