This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Neoplastic Agents, Subject name: Pharmacology
Imatinib mesylate is used in the treatment of: 
Select and explain. 
A. GIST, B. Seminoma, C. MALT, D. Zollinger Ellison syndrome
A: GIST
Answer: A: GIST 
Explanation: 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