Hi J, From what I've read neither EUS nor colonoscopy can see or diagnose MP. Personally I've had 6 EUS in the last 10 years, some with ERCP and they never mentioned seeing MP. But just last week on my annual MRI a new radiologist noticed the MP and also said he could see it on scans (MRI or CT) going back at least 6 years. Your doc probably wants to rule out pancreatitis, stones, etc.