Epidermodysplasia Verruciformis 4, is also known as epidermodysplasia verruciformis, susceptibility to, 4. An important gene associated with Epidermodysplasia Verruciformis 4 is RHOH (Ras Homolog Family Member H). Affiliated tissues include t cells and skin, and related phenotypes are disseminated cutaneous warts and increased proportion of exhausted t cells