Final answer:
Carnoy's fluid is a fixative used in histology to preserve chromosomes and tissue structure during urgent biopsies, aiding in the accurate diagnosis of lymphoma by maintaining cell integrity for examination.
Step-by-step explanation:
Carnoy's fluid is a fixative solution used in histological and cytological applications. It's commonly utilized to preserve and fix tissue samples before microscopic examination. The primary use of Carnoy's fluid is for the preservation of chromosomes during urgent biopsies; it helps to keep the structural integrity of cells and tissue for optimal study under a microscope. When a patient, like Wei in the given context, needs to have a biopsy, determining the specific type of lymphoma is crucial for proper treatment. Carnoy's fluid may be used to preserve the biopsied tissue which can then be analyzed for the presence of specific cell types and cell-surface proteins or antigens. These findings contribute significantly to the accurate diagnosis of the lymphoma subtype, thereby assisting healthcare professionals in delivering targeted therapy.