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Related Experiment Videos

Calcifying fibrous pseudotumor: an ultrastructural study.

T Maeda1, T Hirose, K Furuya

  • 1Department of Pathology, Ehime Prefectural Central Hospital, Matsuyama, Japan. maedatmj@ma3.justnet.ne.jp

Ultrastructural Pathology
|August 13, 1999
PubMed
Summary
This summary is machine-generated.

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Calcifying fibrous pseudotumor (CFT) involves fibroblast degeneration leading to both intracellular and extracellular calcification. These findings clarify the pathogenesis of calcification in this rare tumor.

Area of Science:

  • Pathology
  • Electron Microscopy
  • Tumor Biology

Background:

  • Calcifying fibrous pseudotumor (CFT) is a rare mesenchymal proliferation of uncertain etiology.
  • Understanding the pathogenesis of calcification in CFT is crucial for diagnosis and management.

Observation:

  • Ultrastructural investigation of a chest wall CFT in a 16-month-old boy.
  • Fibroblasts were observed surrounded by abundant collagen fibrils.
  • Dystrophic and psammomatous calcifications were identified within fibroblast cytoplasm and extracellular stroma.

Findings:

  • Cytoplasmic degeneration of fibroblasts appeared to initiate intracellular calcification.
  • Extracellular calcified substances were frequently found adjacent to fibroblasts.
  • Fibroblasts seem integral to both intra- and extracellular calcification processes in CFT.

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Implications:

  • This study elucidates the cellular mechanisms underlying calcification in calcifying fibrous pseudotumor.
  • Highlights the critical role of fibroblasts in the development of calcific deposits in CFT.
  • Provides ultrastructural insights for differentiating CFT from other calcifying lesions.