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Tibial intraosseous lipoma

Case contributed by: Dr Noyan Zenger

Presentation:

Adult presenting with knee pain

Modality: MRI
Modality: X-ray

Case Discussion:

Tibial intraosseous lipoma

Intraosseous lipomas can contain varying amounts of fat, fibrous tissue and cystic degeneration. This results  a range of radiographic manifestations. Stage 2 lesions demonstrate fat and fat necrosis, and also dystrophic calcification.

The characteristic fatty component that is isointense with fatty tissueson T1 images, occupies the periphery of the lesion. Central region which hyperintense on STIR  is suggestive of fluid, which may represent cystic degeneration.

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