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Cell necrosis and endocytosis (apoptosis) in an embryonal rhabdomyosarcoma of the orbit

  • A. G. Dempster
  • W. R. Lee
  • S. Bahnasawi
  • T. Downie
Article

Abstract

An orbital embryonal rhabdomyosarcoma, which was excised from the orbit of an 8-year-old girl, was studied by light microscopy and transmission electron microscopy. Cells within the tumour demonstrated by light microscopy diffuse areas of necrosis and isolated single-cell necrosis. There were many viable tumour cells with intracytoplasmic vacuolar structures which contained basophilic granules. Ultrastructural studies showed close apposition between well-preserved tumour rhabdomyoblasts and degenerate or necrotic tumour cells: degenerate cells and condensed cell fragments were observed within the cytoplasm of the well-preserved tumour cells. Some cells which showed degenerative changes had features which suggested that they had ingested more than one degenerate cell on separate occasions. This phenomenon may be regarded as a variant of selective individual cell death, currently referred to asapoptosis, which has not been previously reported in a case of embryonal rhabdomyosarcoma. The patient remains free of tumour recurrence four years following treatment with combined radiotherapy and chemotherapy.

Keywords

Transmission Electron Microscopy Rhabdomyosarcoma Separate Occasion Viable Tumour Cell Necrosis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • A. G. Dempster
    • 1
  • W. R. Lee
    • 2
  • S. Bahnasawi
    • 3
  • T. Downie
    • 2
  1. 1.Pathology DepartmentThe University of Otago Medical SchoolDunedinNew Zealand
  2. 2.The Tennent Institute of OphthalmologyGlasgowScotland, U.K
  3. 3.Giza Memorial Institute of OphthalmologyCairoEgypt

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