Other tumors of bone
Ecchordosis physaliphora

Author: Nat Pernick, M.D. (see Authors page)

Revised: 20 October 2016, last major update June 2005

Copyright: (c) 2003-2016,, Inc.

PubMed search: ecchordosis physaliphora

Cite this page: Ecchordosis physaliphora. website. Accessed September 25th, 2018.
Definition / general
  • Ectopic notochordal rests present in 2% of adult autopsies at clivus (base of skull) or anterior pons
  • Notocord represents a primitive spine which normally induces development of future vertebrae and eventually forms nucleus pulposus of intervertebral disc
Case reports
Gross description
  • Discrete gelatinous nodule
Microscopic (histologic) description
  • Cells are uniform without lobularity or variability
  • No pleomorphism or necrosis or mucinous pools containing syncytial cell cords, no / rare mitotic activity
  • Not infiltrative or destructive
Additional references