Cystosarcoma phylloides. A steroid receptor and ultrastructure analysis

Ann Surg. 1979 Nov;190(5):640-7. doi: 10.1097/00000658-197911000-00014.


Six cases of cystosarcoma phylloides were evaluated by ultrastructure and steroid receptor analysis. Electron microscopy of the lesions supported previous reports of a heterogeneous tumor consisting of pleomorphic mesenchyme and normal or proliferative epithelium. In each case estrogen and progesterone receptor analysis indicated the presence of a nonsaturable estrogen and progesterone 4S binding protein rather than a specific steroid receptor as suggested by previous studies.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Adolescent
  • Breast Neoplasms / analysis
  • Breast Neoplasms / ultrastructure*
  • Cytological Techniques
  • Female
  • Humans
  • Middle Aged
  • Phyllodes Tumor / analysis
  • Phyllodes Tumor / ultrastructure*
  • Receptors, Estrogen / analysis*
  • Receptors, Progesterone / analysis*


  • Receptors, Estrogen
  • Receptors, Progesterone