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Related Experiment Videos

[Fibrous dysplasia].

K Pollandt1, C Engels, M Werner

  • 1Abteilung Osteopathologie, Pathologisches Institut, Universität Hamburg, Germany.

Der Pathologe
|October 12, 2002
PubMed
Summary
This summary is machine-generated.

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Fibrous dysplasia is a benign bone lesion caused by Gsa protein gene mutations. This condition, presenting in monostotic or polyostotic forms, is typically diagnosed in adulthood and managed with clinical observation.

Area of Science:

  • Orthopedics
  • Genetics
  • Pathology

Background:

  • Fibrous dysplasia is a benign bone disorder.
  • It results from postzygotic mutations in the GNAS gene, encoding the Gsa protein.
  • The condition presents as monostotic (single bone) or polyostotic (multiple bones) variants.

Purpose of the Study:

  • To present observations from 222 cases of fibrous dysplasia.
  • To describe the clinical, radiological, and histological features.
  • To discuss therapeutic implications and the obsolescence of radiotherapy.

Main Methods:

  • Review of 222 cases from the Hamburg Bone Tumor Registry.
  • Analysis of radiological (X-ray) findings, including ground-glass appearance, intramedullary location, and cortical erosion.

Related Experiment Videos

  • Histopathological examination focusing on fibrous trabeculae and collagen fiber orientation.

    • Main Results:

    • Fibrous dysplasia affects any bone, commonly the proximal femur, skull, and ribs.
    • Polyostotic lesions often affect one side of the body.
    • Monostotic form is more frequent (7.6 times), with diagnosis typically in adulthood.
    • Radiographically, lesions show a ground-glass appearance with cortical expansion.
    • Histology reveals characteristic C- and Y-shaped trabeculae in a fibrous stroma.
    • Cartilage is present in 8% of cases.

    Conclusions:

    • Fibrous dysplasia is a benign condition requiring clinical monitoring to prevent deformities and fractures.
    • Surgical intervention is rarely necessary.
    • Radiotherapy is contraindicated due to the risk of malignant transformation.