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Difference between revisions of "Chondrosarcoma"
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→Mesenchymal chondrosarcoma
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====[[Mesenchymal chondrosarcoma]]==== | ====[[Mesenchymal chondrosarcoma]]==== | ||
*Arise in soft tissue; this is where the name comes from.<ref name=pmid14161087>{{cite journal |author=Dowling EA |title=Mesenchymal chondrosarcoma |journal=J Bone Joint Surg Am |volume=46 |issue= |pages=747–54 |year=1964 |month=June |pmid=14161087 |doi= |url=http://www.ejbjs.org/cgi/reprint/46/4/747.pdf}}</ref> | *Arise in soft tissue; this is where the name comes from.<ref name=pmid14161087>{{cite journal |author=Dowling EA |title=Mesenchymal chondrosarcoma |journal=J Bone Joint Surg Am |volume=46 |issue= |pages=747–54 |year=1964 |month=June |pmid=14161087 |doi= |url=http://www.ejbjs.org/cgi/reprint/46/4/747.pdf}}</ref> | ||
==General== | |||
*Rare variant of chondrosarcoma. | *Rare variant of chondrosarcoma. | ||
*2–10% of primary chondrosarcomas | |||
*Adolescents and young adults | |||
*Female predilection | |||
*Most commonly intraosseous but can occur in extraskeletal sites especially the central nervous system (from the meminges) | |||
*Conceptualized as originating from a pleuripotential mesenchymal cell with foci recapitulating enchondral ossification. | |||
*The small cells appear to be an undifferentiated cartilage stem cell which “differentiate” into benign cartilage <ref>{{Cite journal | last1 = Fanburg-Smith | first1 = JC. | last2 = Auerbach | first2 = A. | last3 = Marwaha | first3 = JS. | last4 = Wang | first4 = Z. | last5 = Rushing | first5 = EJ. | title = Reappraisal of mesenchymal chondrosarcoma: novel morphologic observations of the hyaline cartilage and endochondral ossification and beta-catenin, Sox9, and osteocalcin immunostaining of 22 cases. | journal = Hum Pathol | volume = 41 | issue = 5 | pages = 653-62 | month = May | year = 2010 | doi = 10.1016/j.humpath.2009.11.006 | PMID = 20138330 }} | |||
</ref>. | |||
This is where the name comes from.<ref name=pmid14161087>{{cite journal |author=Dowling EA |title=Mesenchymal chondrosarcoma |journal=J Bone Joint Surg Am |volume=46 |issue= |pages=747–54 |year=1964 |month=June |pmid=14161087 |doi= |url=http://www.ejbjs.org/cgi/reprint/46/4/747.pdf}}</ref> | |||
Microscopic | ==Gross== | ||
Pink and fleshy with foci of calcification. | |||
==Microscopic== | |||
*"White clouds in a blue sky". | *"White clouds in a blue sky". | ||
*Malignant tumor with a characteristic biphasic pattern | |||
**Cellular poorly differentiated small round blue cells | |||
**Islands of well-differentiated hyaline cartilage | |||
***Progressive maturation of cartilage towards the center | |||
***Central calcification or bone formation | |||
==IHC== | |||
*SOX9 (positive in small cells and chondrocytes) | |||
*S100 (positive in chondrocytes) | |||
*Osteocalcin (negative in small cells) | |||
==Molecular== | |||
t(8;8)(q21.1;q13.3) HEY1-NCOA2 | |||
==Photos== | |||
<gallery> | |||
*[[File:Bone Chondrosarcoma Mesenchymal MP5 PA.JPG|Islands of cartilage in a background of small blue cells.]] | |||
*[[File:Bone Chondrosarcoma Mesenchymal MP PA.JPG|Islands of cartilage in a background of small blue cells.]] | |||
*[[File:Bone Chondrosarcoma Mesenchymal LP2 PA.JPG|Islands of cartilage in a background of small blue cells.]] | |||
*[[File:Bone Chondrosarcoma Mesenchymal HP5 PA.JPG|Islands of cartilage in a background of small blue cells.]] | |||
*[[File:Bone Chondrosarcoma Mesenchymal MP2 PA.JPG|Islands of cartilage in a background of small blue cells.]] | |||
*[[File:Bone Chondrosarcoma Mesenchymal MP7.JPG|Islands of cartilage in a background of small blue cells.]] | |||
*[[File:Bone Chondrosarcoma Mesenchymal HP3 PA.JPG|Small blue cells predominate]] | |||
</gallery> | |||
==See also== | |||
Image: | Image: | ||
*[http://moon.ouhsc.edu/kfung/jty1/opaq/PathQuiz/S0A001-PQ01-M.htm Mesenchymal chondrosarcoma (ouhsc.edu)]. | *[http://moon.ouhsc.edu/kfung/jty1/opaq/PathQuiz/S0A001-PQ01-M.htm Mesenchymal chondrosarcoma (ouhsc.edu)]. | ||
==References== | |||
{{Reflist|1}} | |||
====Myxoid chondrosarcoma==== | ====Myxoid chondrosarcoma==== | ||