[Eruptive disseminated superficial porokeratosis associated with acute hepatitis E].

Porokeratosis (PK) is a rare form of dermatosis characterized by a keratinization disorder of unknown etiology. Herein we describe the first case associated with hepatitis E virus infection.A 69-year-old patient with colorectal cancer treated with radiation and chemotherapy followed by surgery in April 2017 presented two months later with jaundice associated with annular keratotic lesions of the skin with a raised border. Blood tests revealed elevated liver enzymes and hyperbilirubinemia. Viral hepatitis E was diagnosed based on serology and viral PCR after other aetiologies such as obstruction, auto-immune disease and other viruses (HAV, HBV, HCV, HSV, HIV, EBV and CMV) had been ruled out. A skin biopsy showed a cornoid lamella. Disseminated superficial porokeratosis associated with hepatitis E infection was then diagnosed.The mechanism of PK is unknown and probably involves a combination of different factors. PK has been described in patients with treatment-induced immunosuppression, solid cancer or AIDS, sometimes promoted by HCV viral infection, but never with concomitant HEV infection. A combination of immunosuppression induced by radio-chemotherapy and HEV infection could have prompted the development of PK in our patient.We report the first case of eruptive disseminated superficial porokeratosis associated with hepatitis E infection. The exact role of hepatitis E infection in the development of PK is still unclear.