The edition · Radiology
Five stable years on imaging may be enough to stop watching a low-risk pancreatic cyst
Across 13,269 patients, cancer after five years of stability was rare, and the three major cyst guidelines predicted malignancy only modestly. Automated breast ultrasound cut recalls without losing cancers, and supine MRI may reduce positive margins.
The edition in brief
A single-centre US study of 13,269 patients with pancreatic cystic lesions (2000-2025) used a validated language model to apply ACR, Kyoto and European guideline criteria to radiology reports. Over five years 1.6% developed cancer or high-grade dysplasia. All three guidelines predicted malignancy only modestly (AUROC 0.62 to 0.66) but agreed completely on high-risk lesions. After five years of imaging stability, eight-year cancer incidence was 0.71%, and 0.46% in those meeting Kyoto criteria for stopping surveillance. In 25,328 supplemental screening ultrasounds for dense breasts across 27 US facilities, automated breast ultrasound was associated with fewer abnormal interpretations (14.9% vs 19.2%) and far fewer short-interval follow-up recommendations (3.0% vs 14.6%) than handheld ultrasound, with a similar cancer detection rate. A systematic review of 13 studies (1,718 patients) found supine MRI for breast-conserving surgery planning was associated with fewer positive margins in comparative studies (RR 0.57), though re-excision did not fall significantly and most studies carried a serious risk of bias. The pearl covers how to phrase a recommendation for further imaging so it is acted on.
Automated breast ultrasound: fewer recalls, same cancers found
Automated breast ultrasound was associated with fewer recalls and short-interval follow-ups than handheld scanning, without losing cancers.
Supine MRI for breast-conserving surgery: fewer positive margins, early evidence
Supine MRI may reduce positive margins in breast-conserving surgery, but the evidence is early and largely non-randomised.
Write the follow-up recommendation so someone acts on it
A follow-up recommendation should state the test, the interval and the reason, in the impression.
Pancreatic cysts stable for five years rarely become cancer
For low-risk pancreatic cysts stable for five years, the later cancer risk was low enough to discuss stopping surveillance.
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