SAMPLE 3-1X40
This lesion is a GSK-induced area of focal hyperplasia with atypia now called Mammary Intraepithelial Neoplasia (MIN). Compare the proliferative nature of this lesion with the
adjacent
normal gland.
October 3, 1999
The upper image illustrates the back to back glands of a cribriform pattern and necrosis. This would be regarded as a grade 4 lesion. Compare this with a
grade 1 MIN
.
This image illustrates a single layer of cells with a single layer of cells which would be a grade 1 atypia. Note the normal non-neolastic epithelium at the bottom.
4
x
10
x
20
x
40
x
October 14, 1999