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Selektionskriterien zur neoadjuvanten Radiochemotherapie beim Rektumkarzinom

Neoadjuvante Therapie auch beim lokal fortgeschrittenen Kolonkarzinom?

Selection criteria for neoadjuvant chemoradiotherapy of rectal cancer

Neoadjuvant therapy even for locally advanced colon cancer?

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Zusammenfassung

In den letzten zwei Jahrzehnten wurde für eine zunehmende Zahl an malignen Tumoren des Gastrointestinaltrakts ein neoadjuvantes Therapiekonzept etabliert. Diese Konzepte unterliegen jedoch weiterhin einem steten Wandel hinsichtlich Indikationsstellung und Art der Therapie. Paradebeispiel hierfür ist das Rektumkarzinom. Durch eine neoadjuvante Therapie wurde vor allem die Rate an Lokalrezidiven signifikant gesenkt, ohne dass bisher jedoch valide eine Verlängerung des Gesamtüberlebens oder des krankheitsfreien Überlebens gezeigt werden konnte. Zu Beginn des Jahrtausends wurde noch empfohlen, jedes Rektumkarzinom im Stadium UICC II und III, unabhängig von der Höhenlokalisation, neoadjuvant zu therapieren. Dies wurde zwischenzeitlich zunehmend relativiert, wobei nur noch für lokal fortgeschrittene Tumoren des mittleren und unteren Rektumdrittels die generelle Empfehlung zur Vorbehandlung gilt, während Rektumkarzinome des oberen Drittels im Wesentlichen einem Kolonkarzinom entsprechend zu behandeln sind. Dabei ist zu erwarten, dass die Indikationsstellung in diesem Zusammenhang in Zukunft, vor allem basierend auf einer präoperativen MRT-Untersuchung, noch differenzierter erfolgen wird. Gleichzeitig zeigen erste Studien für das Kolonkarzinom, dass eine neoadjuvante Chemotherapie Vorteile bringt und eine optimierte CT-Bildgebung ein wertvolles Tool zur prätherapeutischen Patientenstratifizierung sein kann.

Abstract

During the last two decades a neoadjuvant treatment concept has been established for an increasing number of malignant tumors of the gastrointestinal tract; however, these concepts are still subject to a constant change concerning the indications and type of treatment. A prime example for this is rectal cancer. The rate of local recurrence in particular was significantly reduced by neoadjuvant therapy but until now it has not been possible to validly show an improvement in overall or disease-free survival. At the beginning of the millennium it was recommended to treat every rectal carcinoma in UICC stages II and III with neoadjuvant therapy, independent of the height localization. In the meantime this has increasingly been relativized and only locally advanced tumors of the middle and lower thirds of the rectum should be pretreated, whereas tumors of the upper third of the rectum should basically be treated in the same way as colon cancer. It is to be expected that there will be further differentiation concerning the indications in this context in the future mainly based on a preoperative magnetic resonance imaging (MRI) examination. At the same time, initial studies for colon cancer show that neoadjuvant chemotherapy can be beneficial and that an optimized computed tomography (CT) scan can be a worthwhile tool with respect to pretherapeutic stratification of patients.

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C. Kastner, B. Petritsch, M. Kim, C.-T. Germer und A. Wiegering geben an, dass kein Interessenkonflikt besteht.

Für diesen Beitrag wurden von den Autoren keine Studien an Menschen oder Tieren durchgeführt. Für die aufgeführten Studien gelten die jeweils dort angegebenen ethischen Richtlinien.

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Kastner, C., Petritsch, B., Kim, M. et al. Selektionskriterien zur neoadjuvanten Radiochemotherapie beim Rektumkarzinom. Chirurg 91, 405–412 (2020). https://doi.org/10.1007/s00104-019-01088-4

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