Title: Imatinib Mesylate in Advanced Dermatofibrosarcoma Protuberans: Pooled Analysis of Two Phase II Clinical Trials
Authors: Rutkowski, Piotr ×
Van Glabbeke, Martine
Rankin, Cathryn J
Ruka, Wlodzimierz
Rubin, Brian P
Debiec-Rychter, Maria
Lazar, Alexander
Gelderblom, Hans
Sciot, Raphael
Lopez-Terrada, Dolores
Hohenberger, Peter
Van Oosterom, Allan
Schuetze, Scott M #
Issue Date: Mar-2010
Publisher: Grune & Stratton
Series Title: Journal of Clinical Oncology vol:28 issue:10 pages:1772-1779
Abstract: PURPOSE: Dermatofibrosarcoma protuberans (DFSP) is a dermal sarcoma typically carrying a translocation between chromosomes 17 and 22 that generates functional platelet-derived growth factor B (PDGFB). PATIENTS AND METHODS: Two distinct phase II trials of imatinib (400 to 800 mg daily) in patients with locally advanced or metastatic DFSP were conducted and closed prematurely, one in Europe (European Organisation for Research and Treatment of Cancer [EORTC]) with 14-week progression-free rate as the primary end point and the other in North America (Southwest Oncology Group [SWOG]) with confirmed objective response rate as the primary end point. In the EORTC trial, confirmation of PDGFB rearrangement was required, and surgery was undertaken after 14 weeks if feasible. The SWOG study confirmed t(17;22) after enrollment. RESULTS: Sixteen and eight patients were enrolled onto the EORTC and SWOG trials, respectively. Tumor size ranged from 1.2 to 49 cm. DFSP was located on head/neck, trunk, and limb in seven, 11, and six patients, respectively, and was classic, pigmented, and fibrosarcomatous DFSP in 13, one, and nine patients, respectively. Metastases were present in seven patients (lung involvement was present six patients). Eleven patients (46%) had partial response as best response, and four patients had progressive disease as best response. Median time to progression (TTP) was 1.7 years. Imatinib was stopped in 11 patients because of progression, one patient because of toxicity, and two patients after complete resection of disease. Median overall survival (OS) time has not been reached; 1-year OS rate was 87.5%. CONCLUSION: Imatinib is active in DFSP harboring t(17;22) including fibrosarcomatous DFSP, with objective response rate approaching 50%. Response rates and TTP did not differ between patients taking 400 mg daily versus 400 mg twice a day.
ISSN: 0732-183X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Human Genetics - miscellaneous
Translational Cell & Tissue Research
Laboratory for Genetics of Malignant Disorders
× corresponding author
# (joint) last author

Files in This Item:
File Description Status SizeFormat
Rutkowsky.pdfpublisher's version pdf Published 349KbAdobe PDFView/Open Request a copy

These files are only available to some KU Leuven Association staff members


All items in Lirias are protected by copyright, with all rights reserved.

© Web of science