???? ???? ??? ??? ?? ??? ??? ???? ????,????,???? ?? ?? ??? ?? ?? ???? ??? ?? ? ?? ? ??? ??????. ?? ??? ????? ?????.Trichothiodystrophy, commonly named TTD, is really a uncommon inherited situation that has an effect on numerous parts of your body. The hallmark of this situation is hair that may be sparse and easily broken. [from MedlinePlus Genetic