title: Triploidy with an extra sex chromosome (70,XXYY) and elevated alpha-fetoprotein levels.
mesh_terms: D004822:Epididymis / Q000196:embryology; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D011123:Polyploidy; D011247:Pregnancy; D012729:Sex Chromosome Aberrations / Q000097:blood / Q000196:embryology / Q000235:genetics*; D013737:Testis / Q000196:embryology; D000509:alpha-Fetoproteins / Q000097:blood
chemical_list: D000509:alpha-Fetoproteins