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Epithelioid monophasic synovial sarcoma

N Weidner1, R Goldman, J Johnston

  • 1Department of Pathology, University of California at San Francisco 94143.

Ultrastructural Pathology
|May 1, 1993
PubMed
Summary
This summary is machine-generated.

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A rare epithelioid soft tissue tumor was identified as a monophasic synovial sarcoma. This diagnosis is crucial for accurate prognostication and treatment planning.

Area of Science:

  • Oncology
  • Pathology
  • Surgical Oncology

Background:

  • Soft tissue tumors present diagnostic challenges, requiring precise classification for effective management.
  • Distinguishing between benign and malignant soft tissue neoplasms is critical for patient outcomes.

Observation:

  • A 47-year-old male presented with a highly vascular soft tissue mass in the distal right thigh.
  • Initial differential diagnoses included glomus tumor and pigmented villonodular synovitis due to tumor morphology and cellular features.

Findings:

  • Immunohistochemical analysis revealed strong cytokeratin reactivity.
  • Ultrastructural examination demonstrated features of epithelial differentiation, including desmosomes and gland lumina.
  • Absence of perinuclear aggregates ruled out malignant rhabdoid tumor and epithelioid sarcoma.

Related Experiment Videos

  • The tumor was ultimately classified as a predominantly epithelioid form of monophasic synovial sarcoma.

    • Implications:

    • Accurate identification of this epithelioid variant of synovial sarcoma is essential for appropriate prognostication.
    • Understanding the clinical behavior of this subtype can guide therapeutic decision-making.
    • This case highlights the importance of integrating morphological, immunohistochemical, and ultrastructural findings in soft tissue tumor diagnosis.