N Concordance 1 ive test that detects the phenotype for Klinefelter's syndrome. Presymptomatic p 2 cer is reported in subjects affected by Klinefelter's syndrome. Benign breast d 3 e one to suspect an uncommon variant of Klinefelter's syndrome. Here we present 4 he karyotype 49,XXXXY is a rare form of Klinefelter's syndrome. Various anomalie 5 hyperestrogenism, such as cirrhosis or Klinefelter's syndrome. There are defin 6 and clinical features of patients with Klinefelter's syndrome with the chief co 7 are more frequent in individuals with Klinefelter's syndrome and are associate 8 ude states of hyperestrogenism, such as Klinefelter's syndrome, schistosomiasis,