title: Klinefelter syndrome presenting with precocious puberty due to a human chorionic gonadotropin (hCG)-producing mediastinal germinoma.
authors.forename: Sasigarn A
authors.initials: SA
authors.lastname: Bowden
authors.forename: John A
authors.initials: JA
authors.lastname: Germak
mesh_terms: D002648:Child; D006063:Chorionic Gonadotropin / Q000378:metabolism; D018237:Germinoma / Q000150:complications* / Q000175:diagnosis / Q000209:etiology / Q000378:metabolism; D006801:Humans; D007713:Klinefelter Syndrome / Q000150:complications* / Q000175:diagnosis*; D008297:Male; D008479:Mediastinal Neoplasms / Q000150:complications* / Q000175:diagnosis / Q000209:etiology / Q000378:metabolism; D011629:Puberty, Precocious / Q000175:diagnosis / Q000209:etiology*
chemical_list: D006063:Chorionic Gonadotropin