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
Locally invasive gastric cancer. Investigation of choice to know depth of cancer invasion
assistant
The correct answer is  EUS is useful to detect the involvement of layers of the stomach, nodal status and to define whether the tumour is early or advanced. All 5 layers are visualised as alternate hypo - hyperechogenic areas Reference SRB edition :5 page : 851