RT Book, Section A1 Johr, Robert H. A1 Stolz, Wilhelm A1 Ida, James A. SR Print(0) ID 1176191956 T1 Glossary T2 Dermoscopy Criteria Review YR 2020 FD 2020 PB McGraw-Hill Education PP New York, NY SN 9781260136241 LK dermatology.mhmedical.com/content.aspx?aid=1176191956 RD 2024/03/29 AB ABCD rule of dermatoscopy: A semiquantitative algorithm that evaluates symmetry or asymmetry (A), sharp border demarcation (B), multiple colors (C), and structural components in a lesion (D). The criteria in each group are given a point and then multiplied by cofactors to determine the total dermatoscopy score (TDS). A score × 1.3 + B score × 0.1 + C score × 0.5 + D score × 0.5 = TDS. TDS greater than 5.45 is highly suggestive of a melanoma.