![]() ![]() People with Noonan syndrome may have skin conditions, which most commonly are: ![]() Kidney problems are generally mild and occur in a fairly small number of people with Noonan syndrome. In males, however, fertility may not develop normally, often because of undescended testicles. Puberty may be delayed in both boys and girls. Undescended testicles (cryptorchidism) are common in males. Many people, especially males, with Noonan syndrome can have problems with the genitals and kidneys. Most commonly cause excess fluid (lymphedema) on the back of the hands or top of the feet.Can be focused in a particular area of the body or widespread.May show up before or after birth or develop in the teenage years or adulthood.Noonan syndrome can cause problems with the lymphatic system, which drains excess fluid from the body and helps fight infection. Noonan syndrome can cause excessive bleeding and bruising due to clotting defects or having too few platelets. Noonan syndrome can cause hearing deficits due to nerve issues or to structural abnormalities in the inner ear bones. Rapid movement of the eyeballs (nystagmus).Refractive problems, such as astigmatism, nearsightedness (myopia) or farsightedness (hyperopia).Problems with the eye muscles, such as cross-eye (strabismus). ![]()
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