Management of Incidental Lymph Nodes on CT or MRI

*Benign imaging features: normal short-axis diameter (<1 cm in retroperitoneum), normal architecture (elongated, fatty hilum), normal enhancement, normal node number. †Abnormal imaging features: enlarged short-axis diameter (≥1 cm in retroperitoneum), architecture (round, indistinct hilum), enhancement (necrosis/hypervascular), increased number (cluster of ≥3 lymph nodes in single nodal station or cluster of ≥2 lymph nodes in ≥2 regions). ‡Nonneoplastic disease: eg, infection, inflammation, connective tissue. §Other evaluation (PET/CT, nuclear scintigraphy [MIBG], endoscopic ultrasound).

From: Heller, M. T., Harisinghani, M., Neitlich, J. D., Yeghiayan, P., & Berland, L. L. (2013). Managing incidental findings on abdominal and pelvic CT and MRI, part 3: white paper of the ACR Incidental Findings Committee II on splenic and nodal findings. Journal of the American College of Radiology : JACR, 10(11), 833–839.