The AJCC Cancer Staging System is the preeminent paradigm used by physicians throughout the world to diagnose cancer and determine the extent to which cancer has progressed. The Seventh Edition of the AJCC Cancer Staging Handbook brings the practice of cancer diagnosis and treatment to the forefront of newly acquired knowledge on the etiology and pathology of cancer. As we learn more and more about cancer, methods of staging cancer must adapt to accomodate the new information. This new edition has completely revised and updated the old classification system to provide a new, evidence-based guide to cancer staging. The Handbook features all the staging information offered in the Manual, in a pocket-size book, transportable for easy reference. The Seventh Edition is an essential resource for residents and health care trainees throughout the world who are involved in cancer treatment and research.