Both CASH and ABCD use very similar criteria, so it is not surprising that the 2 algorithms performed similarly in our study. Both evaluate color, symmetry, and dermoscopic structures. The new feature that CASH introduces is architecture, which forces the user to make a judgment about the overall organization of the lesion. This is an important skill used in the more sophisticated, though difficult-to-learn, technique of pattern analysis, a technique used by expert dermoscopists. The CASH algorithm provides a regimented way of teaching pattern analysis to the novice dermoscopist. Another benefit of CASH is that it does not require any weighting factors to calculate a total score, making it quicker and easier to use.