Bone
Other tumors of bone
Desmoplastic fibroma


Topic Completed: 1 June 2005

Revised: 11 July 2019

Copyright: 2003-2019, PathologyOutlines.com, Inc.

PubMed search: desmoplastic fibroma [title] bone

Nat Pernick, M.D.
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Cite this page: Pernick N. Desmoplastic fibroma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/bonedesmoplasticfibroma.html. Accessed October 21st, 2019.
Definition / general
  • Rare, benign / borderline behavior; bony counterpart of soft tissue fibromatosis
  • 75% younger than age 30 years, may be more common in males
  • Sites: metaphysis of long bones (56%), mandible (26%), pelvis (14%)
Radiology description
  • Lytic and honeycombed (“soap bubble” appearance) metaphyseal lesions, cortical thinning with soft tissue extension
Case reports
Treatment
  • Wide local excision to prevent otherwise frequent recurrences
  • Causes local destruction, no metastases
Gross description
  • White gray, fibrous rubbery mass with variable bony spicules and cysts
Microscopic (histologic) description
  • Mature, bland fibroblasts separated by abundant collagen with thin walled, dilated vascular channels
  • May infiltrate into soft tissue
  • No necrosis, no pleomorphism or atypia, no mitotic activity
Microscopic (histologic) images

Images hosted on other servers:

Bland spindle cells infiltrating into soft tissue

Molecular / cytogenetics description
  • Trisomy 8, trisomy 20
Electron microscopy description
  • Predominantly myofibroblasts, also fibroblasts and primitive mesenchymal cells
Additional references
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