Gonadendysgenesie

In gonadal dysgenesis, differentiation of the primitive gonad to mature gonads is missing. The main symptoms include primary amenorrhea and missing secondary sexual development. To the gynecologist, pure gonadal dysgenesis 46,XX and 46,XY, mixed gonadal dysgenesis, and Turner’s syndrome are clinically important. In all patients with gonadal dysgenesis containing Y chromosome material (e.g. Swyer’s syndrome), removal of the gonads is highly recommended in order to prevent malignancy. The risk of malignancy in these organs is about 25%. Estrogen and progestogen replacement therapy is advocated at the onset of puberty for the induction of female sexual characteristics and prevention of the sequelae of chronic estrogen deficiency. Turner’s syndrome shows typical additional symptoms requiring an interdisciplinary approach, including pediatricians and internists.