Parosteal lipoma

Case contributed by Mohamed Abdel-Tawab Mohamed


Thigh swelling

Patient Data

Age: 50 years
Gender: Female

A bony protrusion is seen at the medial aspect of the femur with surrounding large low-density lesion.


Juxta-cortical fatty mass with variable septations. Related bony protrusion is seen with adjacent cortical thickening.

Case Discussion

Parosteal lipomas are rare. They are composed of fat and have a close relation to bone with hyperostosis of cortex but no medullary invasion. The most common sites are the femoral, radial and humeral shafts. 

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