Could skipping armpit surgery be safer for early breast cancer?

NCT ID NCT02466737

First seen May 11, 2026 · Last updated May 15, 2026 · Updated 1 time

Summary

This study looks at whether avoiding armpit surgery in early-stage breast cancer patients is as safe as the standard sentinel lymph node biopsy. Over 5,500 women having breast-conserving surgery are being followed to see if skipping armpit surgery leads to fewer side effects without increasing cancer recurrence. The goal is to reduce unnecessary procedures and improve quality of life.

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Contacts and locations

Locations

  • AKH Celle, Brustzentrum

    Celle, Lower Saxony, 29223, Germany

  • AN regiomed Klinikum Ansbach

    Ansbach, Bavaria, 91522, Germany

  • Agaplesion Diakonieklinikum, Brustzentrum

    Hamburg, Free and Hanseatic City of Hamburg, 20259, Germany

  • Agaplesion Ev. Klinikum, Brustzentrum Schaumburg

    Obernkirchen, Lower Saxony, 31683, Germany

  • Agaplesion Markus Krankenhaus

    Frankfurt am Main, Hesse, 60431, Germany

  • Albertinen-Krankenhaus, Brustzentrum

    Hamburg, Free and Hanseatic City of Hamburg, 22457, Germany

  • Altmark-Klinikum Brustzentrum

    Hansestadt Salzwedel, Saxony-Anhalt, 29410, Germany

  • Asklepios Paulinenklinik

    Wiesbaden, Hesse, 65197, Germany

  • Augusta-Klinik

    Bochum, Nordrhein, 44791, Germany

  • BGZ Dornbirn, Gynäkologie

    Dornbirn, 6850, Austria

  • BZ Mittelrhein Koblenz+Mayen

    Koblenz, Rhineland-Palatinate, 56073, Germany

  • Bonifatius-Hospital, Brustzentrum

    Lingen, Lower Saxony, 49808, Germany

  • Brustzentrum Donau-Riß

    Ehingen, Baden-Wurttemberg, 89584, Germany

  • Brustzentrum Nordsachsen

    Borna, Saxony, 04552, Germany

  • Caritas-Krankenhaus Brustzentrum Tauberfranken

    Bad Mergentheim, Baden-Wurttemberg, 97980, Germany

  • Carl-Thiem-Klinikum

    Cottbus, Brandenburg, 03046, Germany

  • Charite Campus Mitte

    Berlin, State of Berlin, 10117, Germany

  • DIAKO Diakonissenkrankenhaus

    Flensburg, Schleswig-Holstein, 24939, Germany

  • DIAKO Krankenhaus Bremen

    Bremen, Free Hanseatic City of Bremen, 28239, Germany

  • DRK Kliniken Köpenick

    Berlin, State of Berlin, 12559, Germany

  • DRK Krankenhaus, Brustzentrum

    Sömmerda, Thuringia, 99610, Germany

  • DRK-Kliniken Westend

    Berlin, State of Berlin, 14050, Germany

  • Diakoniekrankenhaus, Frauenklinik

    Rotenburg (Wümme), Lower Saxony, 27356, Germany

  • Diakonissen-Stiftungs-Krankenhaus Speyer

    Speyer, Rhineland-Palatinate, 67346, Germany

  • Diakonissenkrankenhaus

    Dresden, Saxony, 01099, Germany

  • Dietrich Bonhoeffer Klinikum, Brustzentrum

    Neubrandenburg, Mecklenburg-Vorpommern, 17036, Germany

  • Elisabeth Krankenhaus Kassel

    Kassel, Hesse, 34117, Germany

  • Euregio-Klinik Brustzentrum Nordhorn

    Nordhorn, Lower Saxony, 48527, Germany

  • Ev. Krankenhaus, Frauenklinik

    Ludwigsfelde, Brandenburg, 14974, Germany

  • Evang. Waldkrankenhaus Spandau

    Berlin, State of Berlin, 13589, Germany

  • Franziskus Hospital Harderberg

    Georgsmarienhütte, Lower Saxony, 49124, Germany

  • Frauenklinik Freudenstadt

    Freudenstadt, Baden-Wurttemberg, 72250, Germany

  • Frauenklinik der H.-Heine-Universität

    Düsseldorf, Nordrhein, 40225, Germany

  • Frauenklinik der Universität Regensburg, Caritas-Krankenhaus St. Josef

    Regensburg, Bavaria, 93053, Germany

  • Fürst-Stirum-Klinik

    Bruchsal, Baden-Wurttemberg, 76646, Germany

  • Gynäkologische Praxis

    Eggenfelden, Bavaria, 84307, Germany

  • Gynäkologische Praxisklinik Harburg

    Hamburg, Free and Hanseatic City of Hamburg, 21673, Germany

  • Hanusch-Krankenhaus, Brustzentrum

    Vienna, 1140, Austria

  • Harzklinikum, Brustzentrum Harz

    Wernigerode, Saxony-Anhalt, 38855, Germany

  • Helios Dr. Horst Schmidt Klinikum

    Wiesbaden, Hesse, 65199, Germany

  • Helios Klinik

    Schkeuditz, Saxony, 04435, Germany

  • Helios Klinik Pforzheim

    Pforzheim, Baden-Wurttemberg, 75175, Germany

  • Helios Klinik Rottweil

    Rottweil, Baden-Wurttemberg, 78628, Germany

  • Helios Kliniken Schwerin

    Schwerin, Mecklenburg-Vorpommern, 19049, Germany

  • Helios Klinikum Gifhorn

    Gifhorn, Lower Saxony, 38518, Germany

  • Helios Klinikum Meiningen, Brustzentrum

    Meiningen, Thuringia, 98617, Germany

  • Helios Klinikum, Klinik für Gynäkologie

    Buch, State of Berlin, 13125, Germany

  • Henriettenstiftung Frauenklinik

    Hanover, Lower Saxony, 30559, Germany

  • Hufeland-Klinik Bad Langensalza

    Bad Langensalza, Thuringia, 99947, Germany

  • Hämatologisch-onkologische Praxis

    Augsburg, Bavaria, 86150, Germany

  • Johanniter-Krankenhaus, Frauenklinik

    Stendal, Saxony-Anhalt, 39576, Germany

  • KH der Barmherzigen Brüder

    Saint Veit/Glan, 9300, Austria

  • Katharinen-Hospital, Brustzentrum

    Unna, Nordrhein, 59423, Germany

  • Kepler Universitätsklinikum

    Linz, 4020, Austria

  • Klinik St. Marienstift

    Magdeburg, Saxony-Anhalt, 39110, Germany

  • Kliniken Essen-Mitte

    Essen, Nordrhein, 45136, Germany

  • Kliniken Nordoberpfalz AG, Brustzentrum Weiden

    Weiden, Bavaria, 92637, Germany

  • Klinikum Aschaffenburg

    Aschaffenburg, Bavaria, 63739, Germany

  • Klinikum Bayreuth GmbH, Frauenklinik

    Bayreuth, Bavaria, 95445, Germany

  • Klinikum Böblingen

    Böblingen, Baden-Wurttemberg, 71032, Germany

  • Klinikum Ernst von Bergmann

    Potsdam, Brandenburg, 14467, Germany

  • Klinikum Esslingen

    Esslingen am Neckar, Baden-Wurttemberg, 73730, Germany

  • Klinikum Fichtelgebirge gGmbH, Brustzentrum

    Marktredwitz, Bavaria, 95615, Germany

  • Klinikum Frankfurt Höchst

    Frankfurt am Main, Hesse, 65929, Germany

  • Klinikum Fürth

    Fürth, Bavaria, 90766, Germany

  • Klinikum Hanau GmbH

    Hanau, Hesse, 63450, Germany

  • Klinikum Harlaching, Frauenklinik

    München, Bavaria, 81545, Germany

  • Klinikum Kassel

    Kassel, Hesse, 34125, Germany

  • Klinikum Kempten-Oberallgäu

    Kempten (Allgäu), Bavaria, 87439, Germany

  • Klinikum Landshut

    Landshut, Bavaria, 84034, Germany

  • Klinikum Ludwigsburg

    Ludwigsburg, Baden-Wurttemberg, 71640, Germany

  • Klinikum Ludwigshafen

    Ludwigshafen am Rhein, Rhineland-Palatinate, 67063, Germany

  • Klinikum Lünen, Brustzentrum

    Lünen, Nordrhein, 44534, Germany

  • Klinikum Memmingen

    Memmingen, Bavaria, 87700, Germany

  • Klinikum Mitte, Missio Brustzentrum

    Würzburg, Bavaria, 97074, Germany

  • Klinikum Mittelbach Brustzentrum

    Baden-Baden, Baden-Wurttemberg, 76532, Germany

  • Klinikum Märkische Kliniken, Brustzentrum

    Lüdenscheid, Nordrhein, 58515, Germany

  • Klinikum Obergöltzsch Rodewisch

    Rodewisch, Saxony, 08228, Germany

  • Klinikum Osnabrück

    Osnabrück, Lower Saxony, 49076, Germany

  • Klinikum Passau

    Passau, Bavaria, 94032, Germany

  • Klinikum St. Marien

    Amberg, Bavaria, 92224, Germany

  • Klinikum Starnberg

    Starnberg, Bavaria, 82319, Germany

  • Klinikum Traunstein

    Traunstein, Bavaria, 83278, Germany

  • Klinikum Tuttlingen

    Tuttlingen, Baden-Wurttemberg, 78532, Germany

  • Klinikum Wolfsburg, Frauenklinik

    Wolfsburg, Lower Saxony, 38440, Germany

  • Klinikum am Steinenberg

    Reutlingen, Baden-Wurttemberg, 72764, Germany

  • Klinikum der Universität München

    München, Bavaria, 80337, Germany

  • Krankenhaus Bietigheim

    Bietigheim, Baden-Wurttemberg, 74321, Germany

  • Krankenhaus St. Elisabeth und St. Barbara

    Halle, Saxony-Anhalt, 06110, Germany

  • Krankenhaus St. Joseph-Stift

    Dresden, Saxony, 01307, Germany

  • Krankenhaus Waldfriede

    Berlin, State of Berlin, 14163, Germany

  • Kreisklinik Ebersberg

    Ebersberg, Bavaria, 85560, Germany

  • Kreiskrankenhaus Bergstraße gGmbH

    Heppenheim an der Bergstrasse, Hesse, 64646, Germany

  • LKH Uni-Klinikum Graz, Gynäkologie

    Graz, 8036, Austria

  • Landes-Krankenhaus Wolfsberg, Chirurgie

    Wolfsberg, 9400, Austria

  • MHH Frauenklinik

    Hanover, Lower Saxony, 30625, Germany

  • Main-Kinzig-Kliniken Gelnhausen

    Gelnhausen, Hesse, 63571, Germany

  • Marien-Hospital

    Wesel, Nordrhein, 46483, Germany

  • Marienhospital Bottrop

    Bottrop, Nordrhein, 46236, Germany

  • Marienkrankenhaus

    Schwerte, Nordrhein, 58239, Germany

  • Ordensklinikum-BHS

    Linz, 4010, Austria

  • Ostalb-Klinikum, Brustzentrum Aalen

    Aalen, Baden-Wurttemberg, 73430, Germany

  • Park-Klinik Weißensee

    Berlin, State of Berlin, 13086, Germany

  • Rems-Murr Klinik

    Schorndorf, Baden-Wurttemberg, 73614, Germany

  • Rems-Murr Kliniken

    Winnenden, Baden-Wurttemberg, 71364, Germany

  • Rotkreuzklinik Würzburg

    Würzburg, Bavaria, 97070, Germany

  • SRH Waldklinikum

    Gera, Thuringia, 07548, Germany

  • SRH Zentralklinikum Suhl

    Suhl, Thuringia, 98527, Germany

  • Sana Klinikum Berlin-Lichtenberg

    Berlin, State of Berlin, 10365, Germany

  • Sana Klinikum Offenbach

    Offenbach, Hesse, 63069, Germany

  • Sana-Klinik

    Eutin, Schleswig-Holstein, 23701, Germany

  • Sana-Klinikum Biberach

    Biberach, Baden-Wurttemberg, 88400, Germany

  • Schwarzwald-Baar Klinikum

    Villingen-Schwenningen, Baden-Wurttemberg, 78050, Germany

  • Siloah St. Trudpert Klinikum

    Pforzheim, Baden-Wurttemberg, 75179, Germany

  • St. Bernward Krankenhaus

    Hildesheim, Lower Saxony, 31134, Germany

  • St. Elisabeth Krankenhaus

    Leipzig, Saxony, 04277, Germany

  • St. Elisabeth Krankenhaus, Brustzentrum

    Cologne, Nordrhein, 50935, Germany

  • St. Elisabethen Krankenhaus

    Loerrach, Baden-Wurttemberg, 79539, Germany

  • St. Franziskus-Hospital

    Münster, Nordrhein, 48145, Germany

  • St. Gertrauden Krankenhaus

    Berlin, State of Berlin, 10713, Germany

  • St. Josef-Hospital, BZ Rhein-Sieg

    Troisdorf, Nordrhein, 53840, Germany

  • St. Josefs-Hospital, Frauenklinik

    Wiesbaden, Hesse, 65189, Germany

  • St. Joseph Stift

    Bremen, Free Hanseatic City of Bremen, 28209, Germany

  • St. Marienkrankenhaus, Frauenklinik

    Siegen, Nordrhein, 57072, Germany

  • Stadtkrankenhaus Worms

    Worms, Rhineland-Palatinate, 67550, Germany

  • Städtisches Klinikum

    Görlitz, Saxony, 02828, Germany

  • Städtisches Klinikum Brandenburg

    Brandenburg an der Havel, Brandenburg, 14770, Germany

  • Städtisches Klinikum Karlsruhe

    Karlsruhe, Baden-Wurttemberg, 76133, Germany

  • Uniklinik Köln

    Cologne, Nordrhein, 50931, Germany

  • Universität Dresden, Frauenklinik

    Dresden, Saxony, 01307, Germany

  • Universität Greifswald, Frauenklinik

    Greifswald, Mecklenburg-Vorpommern, 17475, Germany

  • Universität Halle/Saale, Frauenklinik

    Halle, Saxony-Anhalt, 06120, Germany

  • Universitäts-Frauenklinik

    Rostock, Mecklenburg-Vorpommern, 18059, Germany

  • Universitätsfrauenklinik

    Tübingen, Baden-Wurttemberg, 72076, Germany

  • Universitätsfrauenklinik Bonn

    Bonn, Nordrhein, 53105, Germany

  • Universitätsfrauenklinik Salzburg

    Salzburg, State of Salzburg, 5020, Austria

  • Universitätsfrauenklinik Ulm

    Ulm, Baden-Wurttemberg, 89075, Germany

  • Universitätsklinikum Brustzentrum

    Frankfurt am Main, Hesse, 60590, Germany

  • Universitätsklinikum Essen Frauenklinik

    Essen, Nordrhein, 45122, Germany

  • Universitätsklinikum Freiburg

    Freiburg im Breisgau, Baden-Wurttemberg, 79106, Germany

  • Universitätsklinikum Hamburg, Brustzentrum

    Hamburg, Free and Hanseatic City of Hamburg, 20246, Germany

  • Universitätsklinikum Heidelberg

    Heidelberg, Baden-Wurttemberg, 69120, Germany

  • Universitätsklinikum Jena

    Jena, Thuringia, 07747, Germany

  • Universitätsklinikum Leipzig, Brustzentrum

    Leipzig, Saxony, 04103, Germany

  • Universitätsklinikum Münster

    Münster, Nordrhein, 48149, Germany

  • Universitätsklinikum Schleswig-Holstein, Campus Lübeck

    Lübeck, Schleswig-Holstein, 23538, Germany

  • Universitätsklinikum Schleswig-Hostein

    Kiel, Schleswig-Holstein, 24105, Germany

  • ViDia Christliche Kliniken, Diakonissenkrankenhaus Karlsruhe

    Karlsruhe, Baden-Wurttemberg, 76199, Germany

  • Vinzenzkrankenhaus Hannover

    Hanover, Lower Saxony, 30559, Germany

  • Westpfalz Klinikum

    Kaiserslautern, Rhineland-Palatinate, 67655, Germany

Conditions

Explore the condition pages connected to this study.