1604 / 1983
RTOG 9804
Low-risk DCIS
-No symptoms: either mammographic finding or incidental finding
in otherwise benign bx
-ONLY low or intermediate grade anywhere
-Size (defined on mammogram if possible) ≤ 2.5 cm
-Margin width ≥ 3 mm
-Stratified by age (+/- 50), size (≤1 cm, >1 cm), margin width (3-9
mm, >1 cm, negative re-excision)
McCormick et al., JCO, 2015