Frozen sections are performed for the purpose of rapid diagnosis while a patient is undergoing surgery, usually under general anesthesia, as a basis for making immediate treatment decisions. Therefore, pathologists must render a diagnosis quickly, despite the pitfalls and artifacts associated with frozen section preparation, which are not present in permanent sections of fully processed tissues that can be examined in a more leisurely fashion. Most standard pathology textbooks largely ignore the topic of frozen section. Few textbooks have ever focused exclusively on frozen section...