???? ???? ??? ??? ?? ??? ??? ???? ????,????,???? ?? ?? ??? ?? ?? ???? ??? ?? ? ?? ? ??? ??????. ?? ??? ????? ?????.Trichothiodystrophy, typically termed TTD, is usually a exceptional inherited situation that affects lots of portions of the body. The hallmark of this ailment is hair that is sparse and simply damaged. [from MedlinePlus Genetics]?? ??