If sealed with dyed wax, it can be preserved for a long time. Keep it in a dry place away from light and avoid strong light.

The Department of Pathology should strengthen the preservation and management of pathological files, in which the preservation period of pathological sections, wax blocks and positive smears is 15 years, the preservation period of negative smears is 1 year, and the preservation period of tissue specimens is 2 weeks after the report is issued. In addition, the Department of Pathology should also formulate procedures for the identification, reporting, investigation and handling of pathological diagnosis errors, find errors in time, analyze the reasons and prevent recurrence.