11
Figure 2. Case Examples to Illustrate Stain Intensity and
Percentage Interpretation (cont'd)
E F
G H
Figure legend: Examples of invasive cancers with various levels of ER expression. Panel E
(50×) and Panel F (200×) are from a case that had between 1-10% of cancer cells staining
with weak intensity (ER Low Positive). is low level of expression is not easily seen on
low power (E) but is more readily seen on moderate to higher powers (F). Panel G (50×)
and Panel H (200×) are from an invasive cancer with no ER expression (0% staining ).
Cases with nuclear staining in <1% of the total cells in the invasive carcinoma sample are
also classified as negative.
