<prompt> Imatinib mesylate is used in the treatment of:GISTSeminomaMALTZollinger Ellison syndrome  <response>: Ref: Goodman tfr Gilhnan, The pharmacological basis of therapeutics, !2: edition, Pg No. 1732-1734.Explanation:Imatinib mesylate is used in the treatment of:Chronic phase of CMLGIST- Gastrointestinal Stromal tumorChronic Myelomonocytic leukemiaHypereosinophilic syndromeDermatofibrosarcoma protruberance 