“The Other Skin Cancer” By Jill Kruse, DO When people talk about skin cancer the type that most people think about is melanoma. This skin cancer follows the ABCDE rules for diagnosis. A – Asymmetry, B – irregular Border, C – more than 1 Color, D – Diameter more than 6 mm, and E – expanding in size. However, these rules will not help find the most common type of skin cancer called ...