Indeterminate imaging features.
 
 
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Note:

Diagnostic benign imaging features:
1. Myelolipoma: presence of macroscopic fat with low CT density (<=-10 HU) or MR signal drop between in-phase and opposed-phase imaging.
2. Cyst or hemorrhage: mass without enhancement, defined as change in pre- and postcontrast imaging of <10 HU.
3. Benign calcified mass such as old hematoma or calcification from prior granulomatous infection.
4. Lipid-rich adenoma: a density of <=10 HU on unenhanced CT or signal loss compared with the spleen between in- and opposed-phase images of a chemical-shift MRI exam.