Can abbreviated MRI replace standard protocols in IPMN surveillance? A retrospective comparative study

Area of Science:

• Radiology
• Oncology
• Gastroenterology

Background:

• Increasing detection of pancreatic cystic lesions (PCLs) due to advanced MRI.
• Branch-duct intraductal papillary mucinous neoplasms (BD-IPMNs) require surveillance for malignant transformation.
• Need for shorter, cost-effective MRI protocols for BD-IPMN surveillance.

Purpose of the Study:

• Evaluate diagnostic performance of abbreviated MRI (A-MRI) for BD-IPMN surveillance.
• Compare A-MRI protocols against standard MRI (S-MRI).
• Assess clinical feasibility of A-MRI in BD-IPMN follow-up.

Main Methods:

• Retrospective single-center study of 124 BD-IPMN patients.
• Analyzed standard MRI (S-MRI) and two abbreviated MRI (A-MRI) protocols.
• Evaluated lesion size, mural nodules, duct dilation, and atrophy for degeneration signs.

Main Results:

• A-MRI showed high diagnostic accuracy (Sensitivity 100%, Specificity 98.3%) for BD-IPMN degeneration markers.
• A-MRI significantly reduced scan time (7-12 min vs. 40-50 min).
• A-MRI missed contrast-enhanced mural nodules and had higher false-positive rates for nodules.

Conclusions:

• A-MRI is a viable, efficient alternative for BD-IPMN surveillance.
• A-MRI reduces imaging time and costs.
• Caution is needed for mural nodule assessment with A-MRI due to lack of contrast enhancement.