J Cancer 2020; 11(11):3180-3185. doi:10.7150/jca.36721 This issue

Research Paper

The long-term outcomes in adolescent and young adult patients with colorectal cancer -A multicenter large-scale cohort study

Yujiro Nakayama1,2✉, Hiroshi Kobayashi1,2, Hidetaka Kawamura1,2, Rie Matsunaga1,2, Yukitoshi Todate1,2, Yoshinao Takano2, Keiichi Takahashi3, Shinichi Yamauchi4, Kenichi Sugihara4, Michitaka Honda1,2

1. Department of Minimally Invasive Surgical and Medical Oncology, Fukushima Medical University, Fukushima.
2. Department of Surgery, Southern Tohoku General Hospital, Koriyama.
3. Department of Surgery, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo.
4. Department of Surgery, Tokyo Medical and Dental University, Tokyo.

This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/). See http://ivyspring.com/terms for full terms and conditions.
Nakayama Y, Kobayashi H, Kawamura H, Matsunaga R, Todate Y, Takano Y, Takahashi K, Yamauchi S, Sugihara K, Honda M. The long-term outcomes in adolescent and young adult patients with colorectal cancer -A multicenter large-scale cohort study. J Cancer 2020; 11(11):3180-3185. doi:10.7150/jca.36721. Available from https://www.jcancer.org/v11p3180.htm

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Introduction: The prognosis of adolescent and young adult (AYA) patients with colorectal cancer (CRC) is still unclear. The aim of this study was to investigate the clinical features and prognosis in AYA patients compared with middle- aged patients.

Methods: Participants were identified from a clinical database of the multicenter cohort in Japan. The AYA group was defined as those <40 years of age, whereas the middle-aged group was defined in 10-year ranges around the median age of all patients. The primary outcome was the overall survival (OS), and the secondary outcome was the recurrence-free survival (RFS).

Results: A total of 502 patients were enrolled as the AYA group, and 7222 patients between 65 and 74 years of age were identified as the middle-aged group. The OS of colon cancer in stages II and III was significantly better in the AYA group (p = 0.033, 0.006, respectively) than in the middle-aged groups. There were no significant differences in the OS of rectal cancer in stages II and III between the two groups.

Conclusion: The prognosis of AYA patients with CRC was the same or better than that in middle-aged patients.

Keywords: Colorectal Neoplasms, adolescent and young adult, prognosis, middle aged, adjuvant therapy