INTRAOSSEOUS LIPOMA

Radiograph shows presence of a well defined lucent lesion in between trabecular areas of the Calcanium Thin Sclerotic margins are seen. Central calcification is seen

Discussion

Intraosseous Lipoma is a rare benign bone lesion with no Presenting Symptoms or rarely mild pain in the region Prevalence of Intraosseous Lipoma is 0.1% of all primary bone tumours Intraosseous Lipoma occurs in both sexes and is seen in metaphysis of long bones. Common sites are Calcaneum 15% Proximal Femur 15%, Tibia 15% Fibula 20%

Milligram has staged Intraosseous Lipoma into Three stages

1. Stage I Solid Tumor of Viable Lipocytes
2. Stage II Transitional Cases with Partial fat necrosis and focal calcification and regions of viable lipocytes
3. Death of fat cells with variable degree of cyst formation, calcification and reactive new bone formation

Radiological features:Stage I: Introsseous lipoma is seen as a well defined lucent lesion due to resorption of bony trabecule

Stage II lucent lesion with thin sclerotic border and central calcification is seen - "Target pattern" can be expansile

Stage III calcification with sclerosis is seen reactive new bone may be seen

Differential Diagnosis:

1. Simple bone cyst
2. Aneurismal Bone cyst
3. Fibrous dysplasia
4. Bone infarcts[4]

 

References

1.	Diagnosis of Bone and Joint disorders By Resnik III Edition
2.	Radiological and Pathological correlation Of Intraosseous Lipoma by Tim Propeck,Mary Anne Bullard,John lin,Kei Doi and William Marte.- AJR 2000: 175 : 673 - 678
3.	Text Book of Radiology and Imaging By David Sutton 7th Edition
4.	G:\MedPix™ Radiology Teaching File, Cases, and Online Medical I.htm

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Correspondence Address:
R R Kumar
Dept of Radio Diagnosis, Santhiram General Hospital, Nandyal, Andhra Pradesh
India

Source of Support: None, Conflict of Interest: None

DOI: 10.4103/0971-3026.32391

Figures

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