This document is a 14-chapter textbook on surgical pathology of the gastrointestinal tract written by Dr. Ketan Vagholkar. The chapters cover various diseases and conditions that affect the esophagus, stomach, small intestine, and colon, including carcinomas, ulcers, tuberculosis, diverticulitis, hemorrhoids, and more. The textbook provides an overview of the clinical presentation, diagnosis, and treatment of common gastrointestinal surgical diseases.