This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Stomach & Duodenum, Subject name: Surgery
Locally invasive gastric carcinoma. Investigation of choice to know depth of cancer invasion: 
Select and explain. 
A. CECT, B. MRI, C. Barium, D. EUS
D: EUS
Answer: D: EUS 
Explanation: The best way to stage the tumor locally is EUS, which gives fairly accurate (80%) information about the depth of tumor penetration into the gastric wall, and can show enlarged (>5mm) perigastric and celiac lymph nodes