What happens after a tumor is removed in the hospital? the lab chops it up and looks at it? what then?

Examined microscopic: The tumor is carefully measured, weighed, and inked for margin status. Then parts are selected for processing in paraffin to make glass slides. These are then interpreted by a pathologist to give a diagnosis, complete with staging and grading information. About one month after a diagnosis, the original tumor is discarded through incineration.

Pathology may: "ink" the tumor to check margins, take representative sections to look for uniformity or divergence of the characteristics, and put a name on the type and grade of tumor, declare whether it is benign or malignant. Slides and stains are made, sometimes fresh tissue is frozen, others are embedded in paraffin for the future. Some speicmens are retained, others destroyed.