Frozen sections are performed while a patient is undergoing surgery as a basis for making an immediate diagnosis that will impact treatment decisions. Frozen section diagnosis is often a highly demanding situation for the pathologist who must render a diagnosis quickly for the patient and surgeon.The Frozen Section Library Series will provide concise, user-friendly, site specific handbooks that are well-illustrated and highlight the pitfalls, artifacts, and differential diagnosis issues that arise in the hurried frozen section scenario. Nicole C. Panarelli, MD is affiliated with Weill Medical College of Cornell University, New York, NY and New York Presbyterian Hospital, New York, NY. Rhonda K. Yantiss, MD is Associate Professor of Pathology and Laboratory Medicine at Weill Medical College of Cornell University, New York, NY. Frozen sections are performed while a patient is undergoing surgery as a basis for making an immediate diagnosis that will impact treatment decisions. Frozen section diagnosis is often a highly demanding situation for the pathologist who must render a diagnosis quickly for the patient and surgeon. The Frozen Section Library Series will provide concise, user-friendly, site specific handbooks that are well-illustrated and highlight the pitfalls, artifacts, and differential diagnosis issues that arise in the hurried frozen section scenario. Nicole C. Panarelli, MD is affiliated with Weill Medical College of Cornell University, New York, NY and New York Presbyterian Hospital, New York, NY. Rhonda K. Yantiss, MD is Associate Professor of Pathology and Laboratory Medicine at Weill Medical College of Cornell University, New York, NY Front Matter....Pages i-ix Intraoperative Evaluation of Colorectal Specimens Containing Cancer....Pages 1-20 Intraoperative Evaluation for Extracolonic Disease in Colon Cancer Patients....Pages 21-33 Metastases and Mimics of Colorectal Carcinoma....Pages 35-57 Non-epithelial Tumors of the Colorectum....Pages 59-75 Frozen Section Assessment of the Colorectum in the Pediatric Population....Pages 77-84 Frozen Section Evaluation of the Appendix....Pages 85-111 Frozen Section Evaluation of Anal Disease....Pages 113-123 Back Matter....Pages 125-136 As a handbook for practicing pathologists, this book will be an indispensable aid to diagnosis and avoiding dangers in one of the most challenging situations that pathologists encounter. Rapid consideration of differential diagnoses and how to avoid traps caused by frozen section artifacts will be readily accessible to the users of this handbook. Currently, there is no other up-to-date single-source reference specifically focused on frozen sections of the lower gastrointestinal tract.