- Etiology: proliferation of mature fat tissue, subcutaneous in location
- US: may have variable appearance (isocechoic, hyperechoic, hypoechoic to adjacent subcutaneous fat) and therefore not 100% diagnostic, minimal flow on Doppler
- CT: negative Hounsfield unit is diagnostic
- DDX: if patient is very young consider lipoblastoma, if lesion is painful or hyperechoic and or vascular consider angiolipoma
- Clinical: most common fatty tumor in children, painless and slow growing but growth may accelerate with weight gain
- Note: imaging cannot 100% reliably differentiate between lipoma, lipoblastoma, liposarcoma
Radiology Cases of Lipoma
