Parul J. Shukla, Regional Chief of Colon and Rectal Surgery, Northwell Health, New York, USA; Professor of Surgery, Donald and Barbara Zucker School of Medicine at Hofstra/Northwell, New York, USA,Kota Momose, Department of Gastroenterological Surgery, Osaka University Graduate School of Medicine, Osaka, Japan,Jeffrey W. Milsom, Professor of Surgery, Department of Colon and Rectal Surgery, Weill Cornell Medicine, New York, USA

Kota Momose was a medical undergraduate in Osaka University, Japan, and then trained in Toranomon Hospital in Tokyo, Japan, as a Junior and Senior Surgical Resident, where he later worked as a Stuff Surgeon of the department of GI surgery. He then studied at the Graduate School of Medicine, Osaka University, and received his PhD in 2017. His PhD work was on molecular biology of oesophageal cancer. He moved to New York City, USA, where he was a Postdoc Research Fellow in the Department of Surgery at Weill Cornell Medicine for 2.5 years, working on device development on GI treatment. He returned to Japan and worked as a Junior Faculty in the Department of Surgery, Kindai University Hospital. His clinical and research interests are in the surgical management of GI cancer.

Parul J. Shukla is Regional Chief of Colon and Rectal Surgery at Northwell Health, New York, USA, and Professor of Surgery at the Donald and Barbara Zucker School of Medicine, Hofstra/Northwell, New York, USA. He received his M.B.B.S. and Master of Surgery degrees from Grant Medical College, Mumbai, India, and completed his general surgery residency at Grant Medical College and Sir J.J. Group of Hospitals, India. Dr Shukla has published over 120 peer reviewed articles, 11 book chapters, and has served as Editor in Chief of the Journal of Colorectal Diseases. He is Fellow of the Royal College of Surgeons of Glasgow, Honorary Member of the Caribbean Society of Endoscopic Surgeons, and was conferred Honorary Fellowship of the Association of Colon and Rectal Surgeons of India. Dr Shukla specializes in the surgical and endoscopic removal of colorectal cancer and polyps.

Jeffrey W. Milsom received his medical degree from the University of Pittsburgh, Pennsylvania, USA. He completed his residencies at Roosevelt Hospital in New York, USA, and the University of Virginia Medical Center, USA, followed by a Fellowship in Colon and Rectal Surgery at the Ferguson Clinic, Grand Rapids, Michigan, USA. He is the former Chief of Colon and Rectal Surgery in the Department of Surgery, Weill Cornell Medicine, New York, USA, and is currently one of the leaders of the Center for Intelligent Image-Guided Interventions (CI-3). He is a member of several professional societies and Fellow at the American Society of Colon and Rectal Surgeons, the American College of Surgeons, and the Society of Surgical Oncology. Dr Milsom specializes in minimally invasive surgery and his career has focused on finding safer, less invasive, and futuristic approaches to surgical interventions for colon and rectal diseases.

1. Appendix: Acute appendicitis, Lea Lowenfeld2. Appendix: Appendiceal neoplasms, Lama Obeid, Jackly Juprasert, and Heather Yeo3. Paediatric colorectal surgery, Alyssa G. Blood and Demetri J. Merianos4. Haemorrhoids, Vinay Rai, Aditi Mishra, and Nitin Mishra5. Anal fissure, Daniel L. Feingold6. Anorectal abscess, Matthew Sweeney and Tushar Samdani7. Fistula in ano, Roy Patankar8. Rectovaginal and rectovesical fistulae, Toyooki Sonoda9. Faecal incontinence, Coen I.M. Baeten and Cornelius G.M.I. Baeten10. Rectal prolapse, Michael Marco, Richard W. Cass, and Kelly A. Garrett11. The workup of colorectal cancer, Pamela W. Lu, Adam C. Fields, and Nelya Melnitchouk12. Colon cancer surgery, Hiroki Ochiai, Yoshiyuki Ishii, and Masahiko Watanabe13. Rectal cancer surgery, Shigeo Toda, Hiroya Kuroyanagi, and Shuichiro Matoba14. Robotic colorectal surgery, James W. T. Toh and Seon Hahn Kim15. Role of radiotherapy in colorectal cancers, Onyinye Balogun16. Role of chemotherapy in colorectal cancers, Ethan L. Parisier and Allyson J. Ocean17. Diverticular disease, Ravin R. Kumar and John A. Michel-Ruddy18. Ischaemic colitis, Olga Beresneva, Kristen Donohue, and David A. Kleiman19. Radiation proctitis, Hannah Thompson, Fadwa Ali, and Maria Widmar20. Management of colonic volvulus, Kemal Deen, Kesara Ratnatunge, and Raeed Deen21. Ulcerative colitis: Non-surgical management, Benjamin L. Gordon, Emily S. Smith, Christopher Tricarico, and David W. Wan22. Ulcerative colitis: Surgical management, Michael J. Grieco and Feza H. Remzi23. Crohn's disease, Christopher Mascarenhas and Ravi Pokala Kiran24. Intestinal stomas, Emmanouil P. Pappou25. Clostridioides difficile infection, Carl V. Crawford and Enad Dawod26. Endoscopic evaluation for surgeons, Satoshi Yamashita and Shu Hoteya27. Current endoscopic treatment techniques: Polypectomy, EMR, ESD, Yuko Fujii, Brett Van Leer-Greenberg, and Makoto Nishimura28. Combined endoscopic and laparoscopic surgery (CELS), Dong Yoon, Kyle Cologne, and Sang W. Lee29. Transanal endoscopic microsurgery (TEM), transanal minimally invasive surgery (TAMIS), and transanal total mesorectal excision (Ta TME), Priyanka A. Sali and Govind Nandakumar30. Endoluminal surgery in the future, Kiyokazu Nakajima and Kota Momose