<prompt> Which of the following is true for Klinefelters syndrome?45X0Arm span and height moreAttains puberty normallyNormal testis and genitalia  <response>: Ans. b. Arm span and height moreKlinefelter Syndrome 47, XXY is seen in 1 in 1,000 births.Genetics; most common findings manifested at pubertyFindingsDecreased IQ average IQ 85-90Behavioralpsychiatric problemsLong limbs decreased upper: lower segment ratioSlim weightheight ratio lowHypogonadism and hypogenitalism testosterone replacement at age 11-12 yearshypergonadotropic hypogonadism increased FSH and LH, and decreased testosteroneInfertility in almost allGynecomastiaExtra MileTall statureUsually a normal variant familial tall statureOther causes: exogenous obesity, endocrine causes growth hormone excess , androgen excess tall as children, short as adultsSyndromes: Homocystinuria, Sotos, Klinefelter 