A study on the color difference between normal and special light observation during endoscopic procedures for colorectal tumors.

A study on the color difference between normal and special light observation during endoscopic procedures for colorectal tumors. - Evaluation of ACI (Acute Colorectal Infection Control) Screening for Colorectal Tumors

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000061058

Enrollment

200

Registered

2026-03-25

Start date

2026-04-01

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Colorectal tumors

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: This study will include patients who visit the outpatient clinic at Keio University Hospital within approximately two years (March 2028) from the date of authorization from the head of the research institution, are diagnosed with a colorectal tumor, undergo lower gastrointestinal endoscopy using a Fujifilm endoscopic system (ELUXEO 8000 system), and who have given informed consent regarding this study.

Exclusion criteria

Exclusion criteria: - Cases involving minors or those lacking the capacity to consent due to dementia, etc. - Other cases deemed unsuitable for registration by the attending physician - Cases where the research participant refuses to participate in this study after registration.

Design outcomes

Primary

Measure	Time frame
The difference in color is determined by comparing WLI and ACI in each lesion (including indigo carmine spray images).	—

Secondary

Measure	Time frame
- Calculate quantitative evaluation of color difference, and analyze its distribution and correlation with lesion characteristics. - Correlation between the presence or absence of color difference and tumor characteristics (e.g., histological type, degree of atypia). - Inter-observer agreement rate regarding color difference determination. - Frequency of color difference occurrence by lesion characteristic.	—

Measure

Time frame

- Calculate quantitative evaluation of color difference, and analyze its distribution and correlation with lesion characteristics. - Correlation between the presence or absence of color difference and tumor characteristics (e.g., histological type, degree of atypia). - Inter-observer agreement rate regarding color difference determination. - Frequency of color difference occurrence by lesion characteristic.

—

Countries

Japan

Contacts

Public ContactMari Mizutani

Keio University Endoscopy center

marimizutani6@keio.jp03-3353-1211

Outcome results