Final answer:
In diagnosing and treating lymphoma, physicians can examine tissue obtained from a biopsy under a microscope to observe physical changes and perform immunohistochemistry tests to determine the presence of specific cell-surface antigens. Identifying cell-surface antigens is important in choosing tailored and effective treatments.
Step-by-step explanation:
Tissue obtained from a biopsy can be examined under a microscope to observe physical changes such as abnormal cell size or shape that are characteristic of a particular subtype of lymphoma. Additionally, immunohistochemistry tests can be performed on the tissue to determine the presence of specific cell-surface antigens. Identifying cell-surface antigens is important in diagnosing and treating lymphoma because it helps physicians identify which cells are cancerous, the specific subtype of cancer, and choose more tailored and effective treatments.