The process begins with the collection of a tissue sample through a biopsy. The sample is then fixed in a preservative, usually formalin, to prevent degradation. The tissue is embedded in paraffin wax, sliced into very thin sections, and placed on slides. These slides are stained with various dyes, such as Hematoxylin and Eosin, to highlight different tissue components. The stained slides are then examined under a microscope by a pathologist.
