Ductal Carcinoma In Situ: What the Pathologist Needs to Know and Why

Table 1

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

Score	1	2	3
Size	≤15 mm	16–40 mm	>40 mm
Margin	≥10 mm	1–9 mm	<1 mm
Class	Grade 1/2 no necrosis	Grade 1/2 with necrosis	Grade 3
Age	>60	40–60	<40