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Assoc. Prof.Cengiz Dibekoğlu, MD

General Surgeon

Rectal Cancer

TEM, TAMIS, and Local Excision

Sphincter preservation for very early rectal cancer — selected indication, not a substitute for TME

In very early rectal adenocarcinoma, selected patients may undergo transanal full-thickness local excision (TEM, TAMIS, or equivalent techniques). The goal is oncologic control while preserving sphincter function — not every tumor qualifies.

Local excision is not “minor surgery”; it is oncologic surgery with a narrow indication. Tumor size, location, MRI staging, pathology (grade, lymphovascular invasion), and margins together determine eligibility. High-risk pathology redirects to TME.

Local excision · educational illustration

Who may be a candidate?

Typical candidates include superficial (T1) and selected T2 lesions, small size (often under ~3 cm), favorable differentiation, endoscopically resectable tumors, and MRI without local advanced features. Distance from the sphincter matters.

  • Early T stage (mostly T1, selected T2)
  • Small lesion, favorable grade
  • MRI without mesorectal / nodal concern
  • Full-thickness excision feasible

TEM versus TAMIS

TEM uses a dedicated platform for full-thickness transanal excision. TAMIS applies the same principle with standard laparoscopic ports and camera access transanally. Both require full-thickness pathology with margin assessment.

Difference from TME — and limits

TME removes the mesorectum en bloc — standard for most mid-to-locally advanced rectal cancer. Local excision does not include lymph-node dissection, so it suits only lesions with low nodal risk. High-grade histology, lymphovascular invasion, or positive margins may require salvage TME.

After local excision

Adjuvant chemoradiation or TME may follow pathology. Surveillance includes endoscopy and MRI. Function is often better than after TME, but wrong selection raises local recurrence risk.

Common questions

  • Is a stoma needed after local excision?
    Tap for details

    Usually not. A temporary protective stoma may be planned in selected cases; permanent stoma is uncommon.

  • What if pathology is unfavorable?
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    High-risk features or positive margins trigger discussion of salvage TME and/or adjuvant therapy — pathology follow-up is essential.

  • Is this the same as removing a colon polyp?
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    No. Rectal lesions require pelvic MRI staging and sphincter-distance planning beyond routine polypectomy.

Evidence

Scientific sources

Show sources · 3

Rectal cancer guidelines informing local excision (TEM / TAMIS) for very early disease.

  1. 1. Rectal cancer: ESMO Clinical Practice Guidelines for diagnosis, treatment and follow-upESMO · 2017 (güncellemeler için ESMO GI portalına bakın) · DOI: 10.1093/annonc/mdx224Open source →
  2. 2. NCCN Clinical Practice Guidelines in Oncology: Rectal CancerNCCN · Güncel sürüm / Current versionOpen source →
  3. 3. ASCRS clinical practice guidelines libraryAmerican Society of Colon & Rectal Surgeons (ASCRS) · Kılavuz kütüphanesi / Guideline libraryOpen source →

Last reviewed: 21 August 2026. Links go to publisher pages.

Bu içerik bilgilendirme amaçlıdır; tıbbi tavsiye yerine geçmez. TNT, watch-and-wait ve cerrahi kararları evreleme, MR bulguları ve tümör konseyi ile kişiye özel verilir.

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