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Splenic angiosarcoma: a clinicopathologic and immunophenotypic study of 28 cases.

T S Neuhauser1, G A Derringer, L D Thompson

  • 1Department of Hematopathology, Armed Forces Institute of Pathology, Washington, DC, USA. Thomas.Neuhauser@59MDW.WHMC.AF.MIL

Modern Pathology : an Official Journal of the United States and Canadian Academy of Pathology, Inc
|September 28, 2000
PubMed
Summary

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Primary splenic angiosarcoma is a rare, aggressive cancer. This study characterized 28 cases, finding it almost universally fatal with frequent metastases and co-expression of endothelial and histiocytic markers.

Area of Science:

  • Oncology
  • Pathology
  • Vascular Biology

Background:

  • Primary splenic angiosarcoma is a rare neoplasm with limited characterization.
  • Understanding its clinical, morphological, and immunophenotypic features is crucial for diagnosis and management.

Purpose of the Study:

  • To characterize the clinical, morphological, and immunophenotypic findings of primary splenic angiosarcoma.
  • To investigate the origin and aggressive nature of this rare splenic tumor.

Main Methods:

  • Retrospective analysis of 28 primary splenic angiosarcoma cases.
  • Clinical data review, macroscopic and microscopic examination.
  • Immunohistochemical analysis using a panel of vascular and histiocytic markers.

Main Results:

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  • The majority of patients presented with abdominal pain and splenomegaly; 25% had splenic rupture.
  • Tumors were heterogeneous, showing vasoformative components with atypical endothelial cells, often with hemorrhage and necrosis.
  • Immunohistochemistry revealed co-expression of endothelial (CD34, FVIIIRAg, VEGFR3, CD31) and histiocytic (CD68, lysozyme) markers in most cases.
  • 100% of patients developed metastases, and the neoplasm was almost universally fatal despite aggressive therapy.

Conclusions:

  • Primary splenic angiosarcoma is an extremely aggressive neoplasm with a universally fatal outcome.
  • Co-expression of histiocytic and endothelial markers suggests a possible origin from splenic lining cells.
  • Further research into targeted therapies is warranted for this rare and aggressive malignancy.