Trichothiodystrophy 1, Photosensitive, also known as trichothiodystrophy with congenital ichthyosis, is related to trichothiodystrophy 2, photosensitive and trichothiodystrophy 3, photosensitive, and has symptoms including photophobia and dry skin. An important gene associated with Trichothiodystrophy 1, Photosensitive is ERCC2 (ERCC Excision Repair 2, TFIIH Core Complex Helicase Subunit), and among its related pathways/superpathways are Transcription_P53 signaling pathway and RNA Polymerase I Transcription Termination. Affiliated tissues include skin and brain, and related phenotypes are microphthalmia and protruding ear