What is the primary role of cytocentrifugation in slide preparation?

• A. Deposits essentially all cells from a sparse fluid onto a slide
• B. Stains cells
• C. Embeds tissue
• D. Dehydrates tissue

Answer: (A)

Cytocentrifugation concentrates cells from a dilute specimen and deposits essentially all of them onto a defined area of a slide, creating a thin, uniform monolayer that is easy to evaluate under the microscope. This is done by spinning the sample in a chamber with a small amount of fixative so cells are driven onto the slide rather than simply spreading out, which is especially important when cell numbers are low because it maximizes cell recovery and yields even distribution without crowding. Staining, embedding, and dehydration are separate steps—staining comes after slide prep to visualize the cells, while embedding and dehydration pertain to processing tissue for histology, not to depositing cells from a fluid onto a slide.