Colorectal precancerous lesions and colorectal cancer (confirmed and suspected)
Conditions
Interventions
Sponsors
Eligibility
Inclusion criteria
Inclusion criteria: 1) The physician in charge of the examination has a cumulative experience of 500 cases or more 2) Patients undergoing colonoscopy 3) Age: 20 years old or older and 90 years old or younger (age at the time of registration) 4) ECOG performance status score: 0-2 5) Purpose of examination: ?Examination after positive fecal occult blood results ?Surveillance after polypectomy ?Surveillance after colorectal cancer surgery ?Screening 6) Restrictions on concomitant drugs/concomitant therapy: ?Patients who can discontinue anticoagulant/antiplatelet agents according to the clinical practice guidelines for gastrointestinal endoscopy 7)Written informed consent has been obtained from the patient to participate in the study
Exclusion criteria
Exclusion criteria: 1) Restrictions on medical history and comorbidities: ?Patients who are currently undergoing chemotherapy or radiotherapy for colorectal cancer ?Patients with familial adenomatous polyposis ?Patients with comorbidities (such as chronic hematological disorders) that make lesion resection difficult ?Patients with active inflammatory bowel disease (ulcerative colitis, Crohn's disease, etc.)
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| PDR (Polyp Detection Rate) | — |
Secondary
| Measure | Time frame |
|---|---|
| 1) ADR (Adenoma Detection Rate) 2) APPC (Adenomas Per Positive Colonoscopy: number of adenomas detected per positive test) 3) Total examination time 4) Endoscopy insertion time 5) Observation time 6) SSL (Sessile Serrated Lesion) detection rate in whole colon and right colon 7) FDR (Flat adenoma detection rate): Flat adenoma includes macroscopic type IIa, IIb, and IIc 8) DDR (Depressed lesion Detection Rate): Depressed lesion includes macroscopic type IIc alone | — |
Countries
Japan
Contacts
National Cancer Center Hospital Division of Endoscopy