“…While a family history of ICTEV is seen in many cases, the heredity nature appears to vary by population. For example, a familial history is seen in 25–30% of Caucasian cases versus in 54% of Polynesian cases [ [21] , [22] , [23] ]. Furthermore, the incidence of ICTEV varies globally ( Table 1 ), implying the presence of a genetic factor.…”