Trichothiodystrophy

Trichothiodystrophy
Other namesAmish brittle hair syndrome, BIDS syndrome, brittle hair–intellectual impairment–decreased fertility–short stature syndrome
This condition is inherited in an autosomal recessive manner.
SpecialtyDermatology, medical genetics 

Trichothiodystrophy (TTD) is an autosomal recessive inherited disorder characterised by brittle hair and intellectual impairment. The word breaks down into tricho – "hair", thio – "sulphur", and dystrophy – "wasting away" or literally "bad nourishment". TTD is associated with a range of symptoms connected with organs of the ectoderm and neuroectoderm. TTD may be subclassified into four syndromes: Approximately half of all patients with trichothiodystrophy have photosensitivity, which divides the classification into syndromes with or without photosensitivity; BIDS and PBIDS, and IBIDS and PIBIDS. Modern covering usage is TTD-P (photosensitive), and TTD.

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