DCIS: Van Nuys Grouping system for Grade

This is a two-parameter system of Bloom-Richardson nuclear grade and necrosis:


intraductal carcinoma (DCIS) of the breast
non-high nuclear grade (NHNG)high nuclear grade (HNG)
with or without necrosis
group 3
NHNG without (absent to slight) necrosis
group 1
NHNG with (affecting 30% or more) necrosis
group 2


Reference: Fisher, et. al., Cancer, 86 (3):429-438. 1 August 1999.

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