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Related Experiment Videos

Malignant fibrous histiocytoma: morphologic pattern or pathologic entity?

K Hollowood1, C D Fletcher

  • 1Department of Histopathology, St Thomas's Hospital (U.M.D.S.), London, England.

Seminars in Diagnostic Pathology
|August 1, 1995
PubMed
Summary
This summary is machine-generated.

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Malignant fibrous histiocytoma (MFH) is debated as a distinct entity. While some variants are heterogeneous, myxoid and angiomatoid types are reproducible soft-tissue tumors.

Area of Science:

  • Oncology
  • Pathology
  • Soft Tissue Tumors

Background:

  • Malignant fibrous histiocytoma (MFH) has been considered the most common adult soft-tissue sarcoma since the 1960s-70s.
  • Despite disproven origins and diagnostic heterogeneity, MFH remains widely accepted as a distinct clinicopathologic entity.
  • Recent studies question MFH, particularly pleomorphic MFH, as a unified entity, suggesting it represents diverse poorly differentiated sarcomas.

Purpose of the Study:

  • To review the clinicopathologic features of MFH and its variants.
  • To evaluate the evidence supporting or refuting the classification of MFH variants as distinct entities.
  • To address the ongoing debate regarding the diagnostic validity of MFH.

Main Methods:

  • Review of clinicopathologic features of malignant fibrous histiocytoma.

Related Experiment Videos

  • Analysis of immunophenotypic, ultrastructural, and karyotypic data.
  • Evaluation of recent studies questioning the entity status of MFH.

    • Main Results:

    • Pleomorphic, giant cell, and inflammatory MFH variants are heterogeneous diagnostic groups lacking cohesive entity status.
    • Myxoid (myxofibrosarcoma) and angiomatoid MFH types are distinct and reproducible tumor types.
    • Significant doubts exist regarding the classification of certain MFH variants as discrete entities.

    Conclusions:

    • The pleomorphic, giant cell, and inflammatory variants of MFH are not cohesive entities.
    • Myxoid (myxofibrosarcoma) and angiomatoid MFH are distinct, reproducible tumor types.
    • The continued acceptance of MFH as a singular entity is challenged by its heterogeneity and the distinct nature of specific variants.