Frozen Sections and Cryostat Technique

Frozen sections represent a rapid diagnostic and research technique essential in tertiary-level cellular pathology, histotechnology, and surgical pathology programs at Zambian universities and colleges. This topic covers the principle of using ice as an embedding medium after rapid tissue freezing, enabling sectioning without dehydration or prolonged fixation. Students will learn the operation of the cryostat, a refrigerated microtome, including temperature optimization for different tissue types (unfixed vs. fixed, fatty vs. aqueous), the use of OCT compound, and the roles of the anti-roll plate and disposable blades. The module highlights critical applications such as intra-operative diagnosis, enzyme histochemistry, lipid demonstration, immunofluorescence, and immunohistochemistry for labile antigens. For Zambian diploma and degree students in medical laboratory science, mastering frozen section technique is vital for urgent clinical decisions, particularly in oncology and surgery. Proficiency supports exam success and readiness for roles in hospital histopathology labs across Zambia, where rapid diagnostics impact patient management and treatment planning.