Top Ad unit 728 × 90

Radiology News


Exostosis-not always easy to identify!

Young Skeleton with pain after fall  shows exophytic opacity outwards from the metaphyseal location of humerus with undisplaced fractures in the vicinity  with almost 2 Humeral heads appearance   suggesting exostosis with suspicion for   secondary chondrosarcoma  of cartilage cap. MRI is needed for further evaluation.

Teaching points by Dr MGK Murthy, Dr Sumer Sethi.
·         Defined as developmental dysplasia of peripheral growth plate which forms cartilage cap  projection of bone near metaphysis of long bones. Peripheral chondroblast grows  outwards acting as ectopic growth  plate , stopping at maturity
·         Most common benign bone tumor. Any bone forming in cartilage can get involved
·         X ray hallmark is blending of tumor in to  the underlying metaphysis  along with calcification of cap elements 
·         Only 1% solitary  ones can turn secondary chondrosarcoma  at the cap , with  10%  in multiple variety
·         Cartilage cap measuring >1cm in adults and 2-3 cms in children on MRI along with  sudden increase in bone scan uptake in adults  is of concern
·         Other complications include bursal formation
Exostosis-not always easy to identify! Reviewed by Sumer Sethi on Wednesday, December 07, 2011 Rating: 5

1 comment:

DrAyushGoel said...

It is also k/a OSTEOCHONDROMA.

It is not a TRUE benign tumor,

MOST COMMON TRUE benign tumor is Osteoid osteoma.

All Rights Reserved by Sumer's Radiology Blog © 2014 - 2015
Powered By Blogger,

Contact Form


Email *

Message *

All contents copyrights with Sumer Sethi. Powered by Blogger.