Klinefelter syndrome 47, XXY

• Facts:
  MC sex chromosomal disorder
• History / PE:
  Testicular fibrosis (primary hypogonadism)
  Azospermia
  Microtestes
  Gynecomastia
  Decreased intelligence
  Decreased axial skeleton growth
• Diagnosis:
  Elevated FSH and LH
• Associated With:
  Testicular cancer
  Infertility, sterility