**4. Closing remarks**

Strategies for targeting colorectal cancer based on existing treatments are gradually being developed, but they do not overcome the recognized limitations yet. Therefore, based on an understanding of various treatment methods from the past to the present, better and more innovative treatments should be proposed with the optimal diagnostic condition, cancer stage, tumor microenvironment, and nutrition should be considered. I hope that readers will be able to shape their ideas for the future of colorectal cancer treatment based on the content of this book.
