Relationship between ileocolic arterial stump length and lymph node yield - a retrospective study using machine...

Area of Science:

• Colorectal Surgery
• Surgical Oncology
• Radiology

Background:

• Ileocolic artery stump length is a potential indicator of mesenteric resection extent in right-sided colon cancer surgery.
• Assessing lymph node yield is crucial for accurate cancer staging and prognosis.

Purpose of the Study:

• To evaluate the association between postoperative ileocolic artery stump length, lymph node yield, and recurrence/progression in right-sided colon cancer.
• To determine if CT-measured stump length can predict lymph node harvest after hemicolectomy.

Main Methods:

• Retrospective study of 64 patients with right-sided colon adenocarcinoma undergoing hemicolectomy.
• Ileocolic artery stump length measured on postoperative CT scans (approx. 12 months).
• Random Forest regression model used to estimate lymph node yield based on stump length; logistic regression for recurrence analysis.

Main Results:

• Mean stump length was 2.03 cm; median lymph node yield was 17.
• A strong inverse relationship was found between stump length and lymph node yield (R² = 0.78).
• Longer stumps showed a non-significant trend toward increased recurrence or progression.

Conclusions:

• Longer ileocolic artery stumps are associated with lower lymph node yield, suggesting less extensive mesenteric resection.
• Postoperative stump length may serve as a surrogate marker for surgical completeness.
• External validation is necessary prior to clinical implementation.