????? ??? ?? ?? ?? ? ?? ??? ?? ???? , ?? ??? ????? ??? ?? ?? ?? ????? ??? ?? ?? ?? ???? ?? ??? ?? ??? ??? ?? ??? ? ??? ??? ?? ????.Trichothiodystrophy, normally referred to as TTD, is actually a rare inherited affliction that affects lots of portions of the body. The hallmark of the problem is hair that's sparse and simply broken. [from MedlinePlus