Flat depressed early colon cancer--a case report

Area of Science:

• Gastroenterology and Oncology
• Colorectal Cancer Research
• Endoscopic Diagnostics

Background:

• Flat depressed early colon cancer (FDEC) presents a unique non-polypoid growth pattern.
• FDEC lacks adenomatous tissue association and shows a propensity for submucosal invasion and metastasis.
• This subtype supports de novo carcinogenesis, distinct from the common adenoma-carcinoma sequence.

Observation:

• Small FDEC lesions are challenging to detect colonoscopically.
• These cancers can rapidly progress to advanced, ulcerating stages.
• A case of FDEC confined to the colonic mucosa was identified.

Findings:

• Indigo carmine contrast colonoscopy enhanced the visualization of a small, flat depressed early colon cancer.
• The detected lesion was confined to the mucosal layer, indicating very early-stage disease.
• This case demonstrates the effectiveness of contrast-enhanced imaging in identifying subtle FDEC.

Implications:

• Early detection of FDEC is crucial for improving patient outcomes.
• Contrast-enhanced colonoscopy techniques may improve the detection rates of FDEC.
• Further research into FDEC pathogenesis and detection is warranted to combat this aggressive cancer subtype.