Phase I/II for Safety and Efficacy of Nilotinib in a Population Steroid-refractory/or Steroid-dependent cGVHD

Maximum tolerated dosage (MTD) will be defined in Phase I. First 3 patients (pts) will receive Nilotinib 200mg daily dose. If no dose limiting toxicities after at least 1month the next 3 pts will be treated with 300mg. If are\>=2 dose limiting toxicities the Phase I will end and MTD will be defined as the next lower dosage. If they will observe 1dose limiting toxicities, they will treat other 3 pts (same dosage); if there isn't dose limiting toxicity, they will increase the dosage in the next cohort; but if they will observe another dose limiting toxicity (tot limiting toxicities 2/6 pts), the study will continue using the previous dose. MTD will be considered the maximum dosage used to treat 6 pts achieving at most 1 dose limiting toxicities, or the previous dosage if with this dosage they we will achieve 2 dose limiting toxicities. Doses will not be escalated beyond \>600 or \<200mg/die The MTD will be used for phase II