???? ??? ?? ?? ? ????? ? ?? ??? ?? ???? ??? ??? ? ??? ? ??? ? ?? ? ??? ??? ??????.Trichothiodystrophy, typically called TTD, can be a rare inherited affliction that impacts lots of areas of the human body. The hallmark of this condition is hair that is definitely sparse and easily broken. [from MedlinePlus Genetics]As you had been browsing a thing