TABLE 3 Extent of DCIS on Core Biopsy versus Invasion on Excision (ex)

From: Histologic and Radiographic Analysis of Ductal Carcinoma In Situ Diagnosed Using Stereotactic Incisional Core Breast Biopsy

Extent of DCIS

<5 ducts

5–15 ducts

>15 ducts

Number of cases

5

18

8

Percent invasive on ex

20% (1/5)

17% (3/18)

63% (5/8)

Degree of invasion

   

 T1a

—

2

4

 T1b

1

—

—

 T1c

—

1

1

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