ERCC6 and Cockayne syndrome type 2: However, many clinical phenotypes of CS‐B cannot be solely attributed to impairment of TC‐NER, suggesting that ERCC6 is involved in other cellular pathways besides TC‐NER (Cleaver et al. 2013; Costanzo et al. 2024; Tiwari et al. 2021; Vessoni et al. 2020).