, Volume 41, Issue 5, pp 617–620 | Cite as

Supramarginal cells in the rat pituitary cleft revealed by scanning electron microscopy

  • S. Correr
  • P. M. Motta
Short Communications Anatomy, Physiology


An unusual cell type consisting of free elements widely scattered over the marginal epithelium of the rat pituitary cleft is revealed by SEM. Most of these supramarginal cells characteristically have irregularly shaped cell bodies from which thin branched processes extend. Supramarginal cells bear resemblances to Kolmer (epiplexus) cells and to supraependymal cells of the brain ventricles. Their ultrastructural features make it probable that supramarginal cells are phagocytes, and can be regarded as scavengers of the cleft. Considering the close topographical association between the hypophysial cleft and the floor or the 3rd ventricle, supramarginal cells may be members of the motile macrophagic Kolmer cells populating the ventricular surfaces of the brain.

Key words

Rat pituitary cleft scanning electron microscopy supramarginal cells 


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Copyright information

© Birkhäuser Verlag 1985

Authors and Affiliations

  • S. Correr
    • 1
  • P. M. Motta
    • 1
  1. 1.Department of Anatomy, Faculty of MedicineUniversity of RomeRome(Italy)

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