0:01

Our next finding is... here is the MIP reconstruction

0:06

and we see this focal area of non-mass enhancement

0:10

on the outer right breast.

0:13

And let's look at our subtraction views

0:15

and find that area.

0:22

So here it is.

0:28

So this is a focal area of non-mass enhancement.

0:32

We want to see if there's a T2 correlate.

0:38

Here's our T2,

0:41

and this is at about the same slice,

0:43

and we don't see a T2 correlate there.

0:45

So we have focal non-mass

0:48

enhancement with

0:51

homogeneous enhancement without

0:54

a definite T2 correlate.

0:58

Again, this is also based on predominantly

1:01

expert opinion, but this is also probably an

1:04

appropriate indication for a BI-RADS 3,

1:07

and this is commonly given a BI-RADS 3 assessment.

1:10

We want to make sure we're differentiating

1:15

the distribution of the non-mass enhancement.

1:19

Linear or segmental non-mass

1:20

enhancement should always be biopsied.

1:24

If there are areas of non-mass enhancement that

1:26

have definite T2 correlates, then we can usually

1:29

assume that those are fibrocystic change or

1:33

another benign etiology and give it a BI-RADS 2.

1:37

So when we're talking about non-mass enhancement,

1:39

BI-RADS 3 should really be reserved for focal areas

1:44

or possibly regional, a little bit larger than

1:46

focal, larger than 2 centimeters, but not

1:49

segmental or linear, area of non-mass enhancement

1:53

that has homogeneous enhancement pattern.

1:57

And there's been small studies to support

2:01

this and a lot of

2:03

expert opinion to also support the

2:05

use of BI-RADS 3 in this specific situation.