Trichothiodystrophy

MONDO:0018053

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

Also known as: trichothiodystrophy syndrome

2 clinical trials for this condition and its sub-types, 2 tagged with Trichothiodystrophy itself.

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Where it sits in the disease tree

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Part of

↑ Ectodermal dysplasia syndrome (45)

Sub-types of Trichothiodystrophy

Photosensitive trichothiodystrophy 0 trials
3 sub-types
- Trichothiodystrophy 1, photosensitive 0 trials
- Trichothiodystrophy 2, photosensitive 0 trials
- Trichothiodystrophy 3, photosensitive 0 trials
Trichothiodystrophy 4, nonphotosensitive 0 trials
Trichothiodystrophy 5, nonphotosensitive 0 trials
Trichothiodystrophy 6, nonphotosensitive 0 trials
Trichothiodystrophy 7, nonphotosensitive 0 trials
Trichothiodystrophy 8, nonphotosensitive 0 trials
Trichothiodystrophy 9, nonphotosensitive 0 trials

Including sub-types (2) Tagged with Trichothiodystrophy (2)

Trials to join now! 1 Completed 1

Scientists study rare DNA repair diseases to unlock cancer prevention secrets

Knowledge-focused Completed

This study looked at people with three rare genetic conditions—xeroderma pigmentosum (XP), Cockayne syndrome (CS), and trichothiodystrophy (TTD)—that affect the body's ability to repair DNA. Researchers examined 709 participants to understand how these defects relate to cancer ri…

Sponsor: National Cancer Institute (NCI) • Aim: Knowledge-focused

Last updated Sep 18, 2026 00:00 UTC

Trichothiodystrophy

Where it sits in the disease tree

Scientists study rare DNA repair diseases to unlock cancer prevention secrets