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[Malignant lymphomas of soft tissues].

H P Meister1

  • 1Institut für Pathologie, Städt, Krankenhaus München-Harlaching.

Verhandlungen Der Deutschen Gesellschaft Fur Pathologie
|January 1, 1992
PubMed
Summary

Malignant lymphoma presenting as soft tissue tumors is rare, accounting for 1.2-2% of cases. Diagnosis requires careful consideration alongside other sarcomas and carcinomas, aided by cell markers.

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Area of Science:

  • Oncology
  • Pathology
  • Hematology

Background:

  • Malignant lymphomas are rarely identified as primary soft tissue tumors, representing 1.2% to 2% of annual soft tissue tumor consultations.
  • Their presentation necessitates inclusion in the differential diagnosis for various soft tissue lesions, including round cell sarcomas, undifferentiated carcinomas, and myxoid spindle cell sarcomas.

Observation:

  • Immunohistochemical analysis using pan-leukocyte and B-/T-cell markers is crucial for accurate differential diagnosis.
  • All identified cases were non-Hodgkin lymphomas, predominantly of the B-cell type, characterized by large cells (centroblasts per Kiel classification).

Findings:

  • The study observed a predominance of large B-cell non-Hodgkin lymphomas among soft tissue malignant lymphomas, consistent with limited published series.
  • Despite a 'highly malignant' morphology, these lymphomas exhibited a relatively good prognosis.
  • A notable characteristic was their propensity for soft tissue involvement, even post-dissemination.

Implications:

  • Further research into specific phenotypic and genotypic cellular findings is warranted for malignant lymphomas presenting as soft tissue tumors.
  • This could enhance diagnostic accuracy and potentially refine treatment strategies for this rare entity.
  • Understanding these specific cellular characteristics may parallel insights gained from studies on subcutaneous T-cell lymphoma and primary bone lymphoma.

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