system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Immuno-marker for GIST is?
assistant
The correct answer is  Ans. is 'a' i.e., CD 117 * CD 117 (c kit) is considered the most specific marker of GIST.* Other markers are CD 34, smooth muscle actin and vimentin.