Could a gi doctor detect pancreatic cancer while doing a scope?

Possibly by ERCP: Ercp (endoscopic retrograde cholangiopancreatography) is a procedure used to diagnose diseases of the biliary system, pancreas, and liver. An endoscopist, gastroenterologist, uses a special endoscope. The endoscopist identifies the place where the bile duct comes into the intestine and then feeds a tiny catheter into the duct and squirts contrast into the bile system and pancreas ducts.

Possibly: It requires a specialized type of upper endoscopy. Routine upper GI endoscopy does not visualize the pancreas, but an ERCP may identify a pancreatic mass effecting the pancreatic duct. Masses in the tail of the pancreas may not be detected. A ct scan , ultrasound, MRI or pet scan are more commonly used, but the diagnosis is often not made early. An ERCP is usually used after a mass is detected.