Epidermodysplasia verruciformis (EV) is a rare genodermatosis associated with a high risk of skin cancer. EV results from an abnormal susceptibility to specific related human papillomavirus (HPV) genotypes and to the oncogenic potential of some of them, mainly HPV5. Infection with EV-associated HPV leads to the early development of disseminated flat wart-like and pityriasis versicolor-like lesions. Patients are unable to reject their lesions, and cutaneous Bowen carcinomas in situ and invasive squamous cell carcinomas develop in about half of them, mainly on sun-exposed areas (summary by Ramoz et al., 2000).
Genetic Heterogeneity of Susceptibility to Epidermodysplasia Verruciformis
Susceptibility to EV2 (618231) is conferred by mutation in the TMC8 gene (605829) on chromosome 17q25; EV3 (618267) by mutation in the CIB1 gene (602293) on chromosome 15q26; EV4 (618307) by mutation in the RHOH gene (602037) on chromosome 4p13; and EV5 (618309) by mutation in the IL7 gene (146660) on chromosome 8q12. [from
OMIM]