“…Although the etiology of Greither's disease is not fully elucidated, several authors have proposed that defects in the keratin 1 gene (KRT1) may be an important pathophysiologic component of this disease. 2 , 3 , 4 , 5 In this report, we describe a case of keratin 1–linked palmoplantar keratoderma with epidermolytic ichthyosis in which a previously unreported mutation in KRT1 was discovered. Although we favor classifying PPKs according to genetic testing, we recognize that this case could also be described as Greither's disease, using the historical eponymous naming system based on morphology and associated features.…”