A patient is found to have a 4 mm pedunculated polyp with high-grade dysplasia confined to the head, negative margins, no lymphovascular invasion, and no poorly differentiated component on polypectomy. What is the appropriate next management step per guidelines?

• A Formal colonic resection due to high-grade dysplasia
• B Polypectomy is adequate treatment; follow-up colonoscopy at 1 year ✓
• C Endoscopic surveillance at 3 months to confirm no residual polyp
• D Ablation of the polypectomy site with argon plasma coagulation

Explanation

For malignant polyps (pT1 colorectal cancer), the Haggitt classification and histological features determine management. When all favorable features are present—complete excision with clear margins, no lymphovascular invasion, no poorly differentiated areas, and no deep submucosal invasion (Sm1 or Haggitt level 1-3 for pedunculated polyps)—endoscopic polypectomy alone is curative with lymph node metastasis risk <1%. Surveillance colonoscopy at 1 year is recommended. Formal resection adds morbidity without oncologic benefit when all favorable criteria are met. High-grade dysplasia in the head of a pedunculated polyp without invasion into the stalk is adequate for polypectomy alone.

Reference: Bailey & Love's Short Practice of Surgery, 27th ed.

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Written and medically reviewed by the StethoPrep medical team.