Trichothiodystrophy

Trichothiodystrophy or TTD is a heterogeneous group disorders characterized by short, brittle hair with low-sulphur content (due to an abnormal synthesis of the sulphur containing keratins).

Pterygium

Pterygia are 'winglike' triangular membranes occurring in the neck, eyes, knees, elbows, ankles or digits.


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