Study to Allow Access to Imatinib for Patients Who Are on Imatinib Treatment in a Novartis-sponsored Study and Are Benefiting From the Treatment as Judged by the Investigator

The study will not include a screening phase as patients will transfer directly from parent studies and will commence treatment with imatinib as soon as they are consented and meet the inclusion criteria of the roll-over protocol. Patients will continue to be treated until they are no longer benefiting from imatinib treatment, develop unacceptable toxicities, withdraw consent, are non-compliant to the protocol, the investigator feels it is no longer in the patient's best interest to continue imatinib therapy or the patient dies, whichever comes first. Patients are allowed to switch to the commercial supply in accordance with the regulation of the respective country. A patient will reach the end of study when imatinib treatment is permanently discontinued and the end of treatment visit has been performed. All patients must be followed up for safety evaluations for 30 days after the last dose of study treatment. Following this there are no further follow-up study visits.