Dear Colleagues,

Amid a flood of information, treatment options for coloanal disorders are growing rapidly. For inflammatory bowel disease (IBD), development of various biologics such as infliximab, adalimumab, and certolizumab pegol, as well as immunomodulators such as azathioprine and 6-Mercaptopurine, has led to improvement in patients’ drug compliance and the prognosis for IBD. As for surgical treatment of colon/rectal diseases, with the rapid development of minimally invasive surgical techniques, particularly for cancer, options for surgical treatment have become diversified including the recent robotic surgeries, thus improving the quality of life of the patients. In particular, the introduction and advancement of robotic surgery have shown oncological results comparable to those of laparoscopic operation, taking into account not only the quality of life of the patients but also the ergonomics of the operator.

Despite the accumulation of such diverse medical knowledge, more medical papers are still needed to establish a global guideline that can be applied to all patients regardless of nationality or race.

Through this Issue, we intend to deal with the contents of coloanal disorder and focus on places with the latest medical opinions covering not only diseases such as IBD but also colon/rectal diseases, including cancer and anal diseases.

Prof. Dr. Seong-taek Oh
Guest Editor

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• inflammatory bowel disease
• colon cancer
• rectal cancer
• chemotherapy
• anal disease