Soft tissue
Extraskeletal bone tumors
Parachordoma


Topic Completed: 1 November 2012

Minor changes: 20 November 2020

Copyright: 2002-2021, PathologyOutlines.com, Inc.

PubMed Search: Parachordoma

Vijay Shankar, M.D.
Page views in 2020: 1,564
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Cite this page: Shankar V. Parachordoma. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/softtissueeskparachordoma.html. Accessed January 22nd, 2021.
Definition / general
  • Rare (< 50 cases reported) soft-tissue tumor resembling extraskeletal myxoid chondrosarcoma and chordoma
  • Develops next to tendon, synovium, osseous structures in extremities
  • Mean age 35 years, range 7 - 62 years
  • Surgical excision usually adequate
Case reports
Microscopic (histologic) description
  • Well circumscribed lobules of large, round and eosinophilic cells, focally resembling physaliferous cells or cartilaginous cells in myxoid to densely hyaline matrix
  • Also spindle cells
Microscopic (histologic) images

Images hosted on other servers:

Presacral tumor

Upper arm

Positive stains
Negative stains
Molecular / cytogenetics description
  • Trisomy 15 (one case), monosomy 1, 16, 17
Differential diagnosis
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