“…A lthough basal ‐ cell carcinoma is the most common type of skin cancer, accounting for the vast majority of the 600,000 or so new cases of cancer of the skin each year, only about 100 well‐documented cases of metastatic basal‐cell carcinoma have been reported 1–9 in the past decade and many fewer, no doubt, before that. The incidence of this rare event in large reported series varies from 1 in 1000 (0.1%) to 1 in 30,000 (0.0028%) 10,11 …”