What are the typical MR imaging appearances of Intraosseous lipoma?
T1 hyperintensity, suppression of fat on saturation sequences and absence of contrast enhancement in keeping with fat content are the key imaging features on MR.
What are the indications of intervention in "Do Not Touch Lesions" of the bone?
Biopsy or surgery is indicated when there is a suspicion of malignant transformation, pathological fracture, deformity or incessant pain
What is the classic sign of intraosseous lipoma of the calcaneum on radiographs?
Cockade sign
MR imaging reveals the lesion to be hyperintense on T1 and hyperintense on T2 with a hypointense rim. There is no enhancement on contrast and suppression on fat saturation sequence. Growth plate involvement is confirmed on MR.