This is an investigator initiated, open label, prospective, non-randomized, phase II trial aimed at evaluating the activity of Axitinib in progressive VEGFR2 and/or PDGFRB positive advanced Solitary Fibrous Tumor (SFT) patients. Patients with a documented and centrally reviewed pathologic and radiologic diagnosis of progressive VEGFR2 and/or PDGFRB positive advanced SFT may enter in the study. Axitinib will be administered at the dose of 5mg twice a day, continuously. Treatment will be continued till evidence of progression, or toxicities or patient withdrawal.~The activity of Axitinib will be evaluated in terms of overall response rate according to Choi Criteria as defined for GIST patients treated with Imatinib, extended even to MRI.~Secondary objectives of the study will be: response rate by RECIST, progression free survival, overall survival, clinical benefit (RECIST Complete Response + Partial Response + Stable Disease >6 months). Whenever possible a post-treatment biopsy will be performed to assess Axitinib targets status after treatment and to correlate their status to the response.~Tumor assessment with CT scan and/or MRI will be performed within 4 weeks prior to first dose of Axitinib and after 4 weeks from starting treatment, then every 2 months until progression or toxicity.~As per protocol the experimental treatment can be administered in front or further line.~The study will be considered positive if 30% of response rate by Choi criteria is observed. To this end a maximum of 16 evaluable patients will be enrolled in two years.~In case of positive study the trial will be re-open to confirm the result in a larger number of patients.~.
This is an investigator initiated, open label, prospective, non-randomized, phase II trial aimed at evaluating the activity of Axitinib in progressive VEGFR2 and/or PDGFRB positive advanced Solitary Fibrous Tumor (SFT) patients. Patients with a documented and centrally reviewed pathologic and radiologic diagnosis of progressive VEGFR2 and/or PDGFRB positive advanced SFT may enter in the study. Axitinib will be administered at the dose of 5mg twice a day, continuously. Treatment will be continued till evidence of progression, or toxicities or patient withdrawal.