Molecular features in a biphenotypic small cell sarcoma with neuroectodermal and muscle differentiation

Hum Pathol. 1998 Feb;29(2):181-4. doi: 10.1016/s0046-8177(98)90230-1.

Abstract

We report a case of a 13-year-old girl with soft tissue sarcoma of the hand, which showed muscle and neuroectodermal immunophenotypes. Molecular studies were performed on RNA collected from fine-needle aspiration (FNA) cytology and peripheral blood samples by nested reverse transcriptase-polymerase chain reaction (RT-PCR) and Southern blot analysis. This biphenotypic tumor showed simultaneous expression of EWS-FLI1 and PAX3-FKHR transcripts, specific of Ewing family tumors and alveolar rhabdomyosarcoma, respectively. Although childhood sarcomas with simultaneous muscle and neural differentiation have been described to have EWS-FLI1 transcripts, there are no reports of tumors with both transcripts. Cytological specimens are a good source of RNA for molecular studies.

Publication types

  • Case Reports
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Biomarkers, Tumor / analysis
  • Blotting, Southern
  • Chimera / genetics
  • Female
  • Hand
  • Humans
  • Immunohistochemistry
  • Immunophenotyping
  • In Situ Hybridization, Fluorescence
  • Magnetic Resonance Imaging
  • Muscle Neoplasms / genetics
  • Muscle Neoplasms / immunology
  • Muscle Neoplasms / pathology*
  • Muscle, Skeletal / immunology
  • Muscle, Skeletal / pathology
  • Neuroectodermal Tumors, Primitive, Peripheral / genetics
  • Neuroectodermal Tumors, Primitive, Peripheral / immunology
  • Neuroectodermal Tumors, Primitive, Peripheral / pathology*
  • Polymerase Chain Reaction
  • RNA, Neoplasm / analysis
  • Sarcoma, Small Cell / genetics
  • Sarcoma, Small Cell / immunology
  • Sarcoma, Small Cell / pathology*

Substances

  • Biomarkers, Tumor
  • RNA, Neoplasm