653
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Difference between revisions of "Chordoma"
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→Microscopic
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DDx: | DDx: | ||
*[[Chondrosarcoma]]. | *[[Chondrosarcoma]] - negative for EMA and cytokeratins. | ||
*[[Myxoid lesions]]. | *[[Myxoid lesions]]. | ||
**Myxopapillary ependymoma. | **Myxopapillary ependymoma. | ||
**Myxoid liposarcoma | **Myxoid liposarcoma - negative for EMA and cytokeratins. | ||
*'Choroid lesions' | *'Choroid lesions' | ||
**Choroid meningioma. | **Choroid meningioma. | ||
**Choroid glioma | **Choroid glioma | ||
**Large notochordal rest. | **Large notochordal rest - only evidence of destructive growth can identify a chordoma. | ||
*Metastasis | *Metastasis | ||
**Metastatic signet ring cell adenocarcinoma | **Metastatic signet ring cell adenocarcinoma - negative for S100 and brachyury (history!) | ||
**Metastatic clear cell renal cell carcinoma | **Metastatic clear cell renal cell carcinoma - negative for S100 and brachyury (history!) | ||
*[[Parachordoma]] - extremely rare. | *[[Parachordoma]] - extremely rare. | ||