A very small subset of basal cell carcinoma (BCC) patients develop high frequency basal cell carcinoma (HF-BCC), or a high burden of continuous BCCs. One definition of HF-BCC is 9 or more BCCs diagnosed over a three-year period. Some of these patients have the rare Gorlin Syndrome, generally resulting from a mutation in the PTCH1 gene. However, limited studies have been done on the patient population which lacks the non-BCC findings typical for Gorlin Syndrome but nonetheless develops many BCCs. Previous studies have estimated the incidence of BCCs in certain countries; however, none of these studies have reported the prevalence specifically of HF-BCC at the population level.