Fibular Osteochondroma-MRI
Focal outgrowth in relation to medial side of fibular neck, with cortical and medullary continuity with fibular neck, with heterogenous appearance of the lesion. These findings likely suggest proximal fibular osteochondroma. Resultant remodelling in posterolateral aspect of tibial metaphysis. Cartilage cap show variable thickness varying from 0.6cm to 1.3cm, with focal thickening of around 1.63cm in posteromedial aspect. Usually 1.5cm is considered thickeness of cartilage cap and needs clinical correlation and further evaluation for focal thickening of the cap.
Learning Point: The cartilaginous cap deserves the most attention when differentiating a benign osteochondroma from a secondary chondrosarcoma that arose from a pre-existing osteochondroma In adults, the cartilaginous cap regresses and becomes thin due to enchondral ossificastion of the majority of the cap.
Malignant transformation is suggested by:
- Cartilaginous cap thickness greater than 1.5cm
- Cortical destruction
- Backgrowth of the cartilaginous cap into the stalk or medullary canal
- Lysis of calcifications in cap
Fibular Osteochondroma-MRI
Reviewed by Sumer Sethi
on
Tuesday, January 05, 2016
Rating:
Reviewed by Sumer Sethi
on
Tuesday, January 05, 2016
Rating:
Sumer Sethi
Unique blend of academic excellence and entrepreneurship, heading leading firms in India- Teleradiology Providers, pioneering company providing teleradiology services and DAMS (Delhi Academy of Medical Sciences) Premier test preparation institute in India for MD/MS/MCI preparation. He has also been an invited faculty member at various conferences, including Teleradiology in IRIA 2008 and 2011, Hospital Build Middle East, Congress of the Brain Tumor Radiology in Neuro-oncology Society. Dr. Sethi is Editor-in-Chief of Internet Journal of Radiology. He has a keen interest in Web 2.0 technologies and in maintaining his famous radiology blog, which has been featured in multiple international journals.
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