Trichothiodystrophy 6, Nonphotosensitive, also known as ttd6, is related to renal wilms' tumor and perlman syndrome. An important gene associated with Trichothiodystrophy 6, Nonphotosensitive is GTF2E2 (General Transcription Factor IIE Subunit 2). Affiliated tissues include skin and bone, and related phenotypes are nystagmus and delayed skeletal maturation