Table 1.

Scoring system for University of Southern California/Van Nuys Prognostic Index

Score	1	2	3
Size	≤15 mm	16–40	>40
Margin	≥10 mm	1–9	<1
Class	Grade 1/2 without necrosis	Grade 1/2 with necrosis	Grade 3
Age	>60	40–60	<40