Klinefelter's syndrome and mediastinal teratoma.
D000293:Adolescent; D002648:Child; D006801:Humans; D007713:Klinefelter Syndrome / Q000150:complications*; D008297:Male; D008479:Mediastinal Neoplasms / Q000150:complications* / Q000235:genetics; D013724:Teratoma / Q000150:complications* / Q000235:genetics