alexa Sunitinib malate in solitary fibrous tumor (SFT).
Pulmonology

Pulmonology

Journal of Pulmonary & Respiratory Medicine

Author(s): Stacchiotti S, Negri T, Libertini M, Palassini E, Marrari A, , Stacchiotti S, Negri T, Libertini M, Palassini E, Marrari A,

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Abstract BACKGROUND: To report on sunitinib activity in a retrospective series of 35 solitary fibrous tumor (SFT) treated at a single institution. PATIENTS AND METHODS: From April 2008, 35 patients with progressive advanced SFT (male/female: 20/15; mean age: 58 years; meningeal/extrameningeal: 6/29; locally advanced/metastatic: 15/20; prior chemotherapy: 25) were treated, on an individual use basis, with continuous-dosing sunitinib 37.5 mg/day. Platelet-derived growth factor receptor beta (PDGFRB) and vascular endothelial growth factor receptor 2 (VEGFR2) status were assessed by immunohistochemistry and, in a subgroup of patients, by real time PCR. RESULTS: Thirty-one patients were assessable for response by RECIST (one early death; three early interruptions). Best responses were 2 partial response (PR), 16 stable disease, 13 progressive disease. A <30\% decrease in size was observed in three patients. Fourteen of 29 patients assessable by Choi criteria had a PR. Median progression-free survival by RECIST was 6 months (range 1-22). In two of six patients, resistance to sunitinib was overcome by increasing sunitinib to 50 mg/day. PDGFRB and/or VEGFR2 were positive in all cases and not predictive of response; a less aggressive morphology corresponded to an increased response rate (53\% PR by Choi in the malignant SFT, 20\% PR in the pleomorphic/dedifferentiated SFT). CONCLUSIONS: Sunitinib is active in SFT. Response can be long-lasting. This article was published in Ann Oncol and referenced in Journal of Pulmonary & Respiratory Medicine

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