Pathology dictionary -
Hematoxylin and eosin (H&E)
When tissue samples are cut and placed on a slide for examination under the microscope, the tissue is so thin that it is almost invisible. In order for your pathologist to be able to see the tissue, it is stained with special dyes to give it colour.
Hematoxylin and eosin are the two stains routinely used on tissue samples so that they can be seen under the microscope. Hematoxylin sticks to DNA which turns the nucleus blue or purple. Eosin sticks to proteins and other parts of the cells which turns them pink or red.
The combination of these two stains allows pathologists to distinguish between different types of cells and even different parts inside the same cell. Abnormal cells tend to look different than normal cells when stained with hematoxylin and eosin which makes this stain very powerful for everyday use in pathology.
You may see the abbreviation ‘H&E’ in your pathology report, referring to slides that have been stained with hematoxylin and eosin.