Virchows Archiv A

, Volume 400, Issue 1, pp 43–51

Malignant melanomas contain only the vimentin type of intermediate filaments

  • Jörg Caselitz
  • Michael Jänner
  • Eckhardt Breitbart
  • Klaus Weber
  • Mary Osborn
Article

DOI: 10.1007/BF00627007

Cite this article as:
Caselitz, J., Jänner, M., Breitbart, E. et al. Vichows Archiv A Pathol Anat (1983) 400: 43. doi:10.1007/BF00627007

Summary

Six malignant melanomas have been examined for the type of intermediate filament they contain. All six cases showed positive staining of intermediate filaments with antibodies to vimentin, with cells containing large numbers of melanosomes being stained less strongly in general.

The tumor cells did not react with antibodies to keratin, desmin, neurofilaments or glial fibrillary acidic protein. Thus typing of intermediate filaments can distinguish melanoma from undifferentiated carcinoma, but not from lymphoma or sarcoma. Since melanocytes are known to be vimentin positive, and since most of the samples we studied were from metastases, these results are a further indication that the intermediate filament type typical of the parental cell is retained in the metastases, as well as in the primaries of solid tumours.

The implications of vimentin positivity for the histiogenesis of the melanocyte are also discussed.

Key words

Malignant melanomaIntermediate filamentsVimentinImmunohistochemistry

Copyright information

© Springer-Verlag 1983

Authors and Affiliations

  • Jörg Caselitz
    • 1
  • Michael Jänner
    • 2
  • Eckhardt Breitbart
    • 2
  • Klaus Weber
    • 3
  • Mary Osborn
    • 3
  1. 1.Institut für Pathologie der Universität HamburgHamburg
  2. 2.Dermatologische Klinik der Universität HamburgHamburg
  3. 3.Max Planck Institut für Biophysikalische ChemieGöttingenGermany