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DOI: 10.1055/s-2006-926877
© Karl Demeter Verlag im Georg Thieme Verlag KG Stuttgart · New York
Lokale Nachexzision nach endoskopischer R1/R2-Polypektomie von pT1-„low-risk”- Karzinomen des Rektums durch transanale endoskopische Mikrochirurgie (TEM)
Local Excision with Transanal Endoscopic Microsurgery (TEM) after Endoscopic R1/R2-Polypectomy of pT1 “Low-Risk” Carcinomas of the RectumPublication History
Manuskript eingetroffen: 30.3.2006
Manuskript akzeptiert: 29.5.2006
Publication Date:
11 August 2006 (online)
Zusammenfassung
Die transanale endoskopische Mikrochirurgie (TEM) eignet sich zur lokalen Vollwandexzision von großflächigen Rektumadenomen und pT1-„low-risk”-Rektumkarzinomen. Die Wertigkeit dieser Methode zur lokalen Nachresektion nach endoskopischer R1/R2-Polypektomie von malignen Rektumpolypen wurde anhand einer prospektiven Nachsorgedokumentation überprüft. 16 Patienten mit einem makroskopisch (R2) oder mikroskopisch (R1) unvollständig durch endoskopische Polypektomie abgetragenem pT1-„low-risk”-Rektumkarzinom wurden mittels TEM nachreseziert. Bei 12 Patienten (75 %) wurde kein Residualtumor gefunden. In den übrigen vier Fällen (25 %) wurden 1 Adenom (High-grade-Atypie), 2 pT1-„low-risk”-Karzinome und eine Karzinominfiltration (pT3) ins Mesorektum diagnostiziert. Der Patient mit der mesorektalen Infiltration wurde umgehend durch eine anteriore Rektumresektion behandelt. Im Präparat befanden sich keine Tumorzellen. Das Follow-up betrug 21 Monate. 18 Monate nach TEM entwickelte sich bei einem Patienten mit pT1-„low-risk”-Karzinom ein Lokalrezidiv und eine Lebermetastase, welche komplett entfernt werden konnten. Alle Patienten sind tumorfrei. Die transanale endoskopische Mikrochirurgie ist eine geeignete Methode, um Patienten nach endoskopischer R1/R2-Polypektomie bei pT1-„low-risk”-Rektumkarzinomen weiter zu behandeln. Im Falle einer „High-risk”-Situation oder eines höheren Tumorstadiums (pT > 1) nach TEM muss eine radikale Nachresektion erfolgen.
Abstract
The transanal endoscopic microsurgery (TEM) is an adequate method for the local full-thickness excision of large rectum polyps and pT1 “low-risk” rectal carcinomas. We studied prospectively the relevance of this surgical technique concerning complete tumour excision after R1/R2-polypectomy of malignant rectal polyps. 16 patients with pT1 “low-risk” rectal carcinoma and macroscopic (R2) or microscopic (R1) incomplete endoscopic polypectomy were locally resected by TEM. In 12 patients (75 %) no residual tumour was found. In the remaining four cases (25 %), one adenoma with high-grade atypia, two pT1 “low-risk” carcinomas and one tumour infiltration in the mesorectal fat were diagnosed. The patient with the mesorectal infiltration was immediately operated on with radical resection. No further tumour cells were found in this specimen. The median follow-up was 21 months. One patient with a pT1 “low-risk” carcinoma developed a local recurrence and a single hepatic metastasis in the left liver lobe after TEM. Both were completely resected. Currently, all patients are living without evidence of tumour recurrence. Transanal endoscopic microsurgery is a suitable method for the treatment of pT1 “low-risk” rectal carcinomas after incomplete endoscopic polypectomy. In cases of a “high-risk” tumour or deeper tumour infiltration (pT> 1) after TEM radical resection must be carried out.
Schlüsselwörter
Transanale endoskopische Mikrochirurgie - pT1-„low-risk”-Rektumkarzinom - inkomplette endoskopische Polypektomie - lokale Exzision
Key words
Transanal endoscopic microsurgery - pT1 “low-risk” rectal carcinoma - incomplete endoscopic polypectomy - local excision
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PD Dr. Hartmut Hans Schäfer
Visceral and Vascular Surgery
Josef-Stelzmann-Str. 9
50931 Köln
Email: hartmut.schaefer@uni-koeln.de