Question 23
A 50 year old male patient presents to the emergency with sudden onset of upper abdominal pain, nausea, vomiting and haematemesis. On examination, PR=106/min, BP=100/70 mm Hg and pallor is present. CECT abdomen reveals a large exophytic tumor of size 13x8 cm at the fundus of the stomach. On upper GI endoscopy, the mucosa overlying the tumor is intact. The staining for CD117 in the upper GI endoscopic biopsy is positive. The most probable clinical diagnosis in this patient is