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Difference between revisions of "Chondro-osseous tumours"
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Chondro-osseous tumours (view source)
Revision as of 16:48, 18 September 2012
, 16:48, 18 September 2012→Osteochondroma: expand
(→Osteochondroma: expand) |
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*Benign. | *Benign. | ||
*Very common. | *Very common. | ||
*Abnormal outgrowth of bone and cartilage. | *Abnormal outgrowth of bone and cartilage - associated with growth plate. | ||
*Usually present before age 20.<ref name=pmid12873205>{{Cite journal | last1 = Parkin | first1 = B. | last2 = Bennett | first2 = JC. | last3 = Zaher | first3 = A. | title = Pathologic quiz case: an iliac mass in a 25-year-old woman. Osteochondroma. | journal = Arch Pathol Lab Med | volume = 127 | issue = 8 | pages = e355-6 | month = Aug | year = 2003 | doi = 10.1043/1543-2165(2003)127e355:PQCAIM2.0.CO;2 | PMID = 12873205 | URL = http://www.archivesofpathology.org/doi/full/10.1043/1543-2165%282003%29127%3Ce355:PQCAIM%3E2.0.CO;2}}</ref> | |||
===Gross=== | ===Gross=== | ||
* | Features:<ref name=pmid12873205/> | ||
*Usu. epiphyseal lesions. | |||
**Often distal femor, proximal humerus or proximal tibia. | |||
*Mushroom-like shape - with broad or narrow base. | |||
Note: | |||
*Very unusual in craniofacial bones.<ref name=pmid12873205/> | |||
===Microscopic=== | ===Microscopic=== | ||
Features: | Features:<ref name=pmid12873205/> | ||
* | *Bone - forms base of "mushroom". | ||
*Cartilage - usu. thinner in older individuals. | |||
**May have mild atypia. | |||
**Nuclear enlargement - up to 5x normal. | |||
Images: | Images: | ||
*[http://path.upmc.edu/cases/case341.html Super rare intracranial mesenchymal osteochondroma - several images (upmc.edu)]. | *[http://path.upmc.edu/cases/case341.html Super rare intracranial mesenchymal osteochondroma - several images (upmc.edu)]. | ||
DDx: | |||
*[[Chondrosarcoma]] - esp. in older individuals. | |||
==Diffuse tenosynovial giant-cell tumour== | ==Diffuse tenosynovial giant-cell tumour== | ||