๐ Calcaneal Intraosseous Lipoma
โ Diagnostic Features
- Obvious fat signal intensity on T1-weighted MRI images
- High sensitivity and specificity for diagnosis
- Expansile lesion that remodels cancellous and cortical bone (distinguishes from bone infarction)
โ Differential Diagnosis
- Bone infarct
- Unicameral bone cyst
- Aneurysmal bone cyst
- Chondromyxoid fibroma
- Osteoblastoma
- Giant cell tumor
โ Unicameral bone cyst vs intraosseous lipoma
- Bone Cyst:
- Appears as a water-density lesion (0–30 Hounsfield units).
- Low signal intensity on T1-weighted images.
- High signal intensity on T2-weighted images.
- Does not enhance after contrast administration.
- Intraosseous Lipoma:
- High signal intensity on T1-weighted images.
- Relatively high signal intensity on T2-weighted images.
- Very low intensity on fat-suppressed sequences.
- May show a slightly higher central signal due to granulation tissue or necrosis.
#IntraosseousLipomas, #BoneTumors, #BenignLesions, #LipogenicTumors, #Calcaneus, #BoneCyst, #IntraosseousLipoma, #Radiology, #MusculoskeletalImaging, #Radiolucency, #Pseudolesion
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