Correction to "Personalized surveillance in colorectal cancer: Integrating circulating tumor DNA and artificial intelligence into post-treatment follow-up"

Table 1 Comparison of international guidelines for colorectal cancer surveillance

Surveillance method	ACPGBI (United Kingdom/Ireland)[18]	NCCN (United States)[19,20]	ESMO (Europe)[21,22]	JSCCR (Japan)[23]	CSCO (China)[24]
Clinical exam & CEA	Every 6 months (for 3 years)	Every 3-6 months (years 1-2), then every 6 months (up to 5 years)	Every 3-6 months (years 1-3), 6-12 months (years 4-5)	Every 3 months (years 1-3), every 6 months (years 4-5)	Stage I: Every 6 months Stage II-III: Every 3 months (years 1-3), then every 6 months (years 4-5)
CT	Minimum two evaluations within 3 years	Every 6-12 months (up to 5 years), Stage IV: Every 3-6 months (first 2 years), every 6-12 months up to 5 years	Every 6-12 months (years 1-3), annually (years 4-5)	Every 6 months (years 1-3), twice per year stage III, annually stages I-II (years 4-5)	Stage III/IV: Every 6-12 months (years 1-5), or in cases of increased CEA or abnormal ultrasound
Colonoscopy	Year 1, then every 5 years	Year 1; if adenoma present repeat at 1 year; if no adenoma, repeat at year 3, then every 5 years	Starting year 1, then every 3-5 years	Colon cancer: Years 1 & 3; rectal cancer: Years 1, 2 & 3	Year 1, then year 3, afterwards every 5 years
Additional imaging	Not routinely recommended	Not routinely recommended	Not routinely recommended	Not routinely recommended	Liver ultrasound recommended for stages I-II

CT: Computed tomography; CEA: Carcinoembryonic antigen; ACPGBI: The Association of Coloproctology of Great Britain and Ireland; NCCN: National Comprehensive Cancer Network; ESMO: European Society for Medical Oncology; JSCCR: Japanese Society for Cancer of the Colon and Rectum; CSCO: The Chinese Society of Clinical Oncology.