Pathology About Gastrointestinal Stromal Tumor (GIST) all are true except – A Most common site is stomach B Originates from interstitial cells of Cajal C Size plays a role in prognosis D ALK mutation is seen in most cases 💡 Explanation About Gastrointestinal Stromal Tumor (GIST) all are true except - ✓ Correct Answer: D. ALK mutation is seen in most cases