Description Recommendation Notes
Prior imaging: Stable x 1 yr No further evaluation
Prior imaging: Not stable Evaluate with PET, MR, biopsy
Cancer history, < 1cm MRI in 6-12 months
Cancer history, ≥ 1cm Evaluate with PET, MR, biopsy
No cancer history, suspicious features Evaluate with PET, MR, biopsy Heterogeneous enhancement irregular margins, necrosis
No cancer history,

indeterminate features

MRI in 6-12 months Heterogeneous, >20 HU, enhancement, smooth margins
Diagnostic benign findings No further evaluation Homogenous, <20 HU, non-enhancing, smooth margins



Heller, M. T., et al. (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.” J Am Coll Radiol 10(11): 833-839.