Neoadjuvant Imatinib in Advanced Primary or Locally Recurrent Dermatofibrosarcoma Protuberans: A Multicenter Phase II DeCOG Trial with Long-term Follow-up

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria

1Department of Dermatology, University of Würzburg, Würzburg; 2Dermatopathology Bodensee, Friedrichshafen; 3Skin Cancer Unit, German Cancer Research Center, Heidelberg; 4Department of Dermatology, University Hospital Heidelberg, Heidelberg; 5Department of Dermatology, University Medical Center Mannheim, University of Heidelberg, Mannheim; 6Department of Dermatology, Martin Luther University, Halle/Saale; 7Department of Dermatology, Elbe Klinikum Buxtehude, Buxtehude; 8Department of Dermatology, Saarland University Hospital, Homburg, Saarland; 9Department of Dermatology, University Hospital of Münster, Münster; 10Department of Dermatology, University of Kiel, Kiel; 11Department of Dermatology, Technical University Munich, Munich; 12Department of Dermatology, University Hospital Erlangen, Erlangen; 13Department of Dermatology, Helios Klinikum Erfurt, Erfurt; 14Department of Pathology, University of Göttingen, Göttingen; 15Department of Dermatology, University of Essen, Essen, Germany; and 16Department of Dermatology, Medical University Graz, Graz, Austria