The interpretation of Magnetic Resonance Cholangio-pancreatography (MRCP)-findings is primarily performed by radiologists who only in some cases have experience with the interpretation of endoscopic retrograde cholangiopancreatography (ERCP)-images. It is unclear if MRCP-interpretation by the radiologist is sufficient to decide which additional endoscopic procedures might be necessary in an individual case or if an additional MRCP-interpretation by the endoscopist renders any clinical impact.

Inclusion Criteria:

• Patients aged 18 years or older who were referred for pancreato-biliary endoscopy to our unit based on actual MRCP-findings. In all cases MRCP should have been performed within 4 weeks prior admittance and a written radiological report as well as the digital images must be available.

Exclusion Criteria:

• Patients who had any endoscopic interventions in our institution before and also patients who underwent MRCP at our hospital were excluded.

During 1/2007 until 12/2009 consecutive patients who were referred for dedicated endoscopic procedures regarding suspected alterations of the pancreato-biliary ductal system (nearly exclusively for EUS and/or ERCP) to our unit based on actual MRCP-findings were enrolled.