title: Letter: Bilateral teratoma of testis in 2 brothers with 47,XXY Klinefelter's syndrome.
mesh_terms: D006801:Humans; D007713:Klinefelter Syndrome / Q000150:complications* / Q000235:genetics; D008297:Male; D013724:Teratoma / Q000150:complications* / Q000235:genetics; D013736:Testicular Neoplasms / Q000150:complications* / Q000235:genetics