Suvarna Garge (Editor)

Pineocytoma

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Specialty
  
oncology

ICD-O
  
M9361/1

ICD-10
  
C75.3

MeSH
  
D010871

Pineocytoma

Pineocytoma, also known as a pinealocytoma, is a benign, slowly growing tumor of the pineal gland. Unlike the similar condition pineal gland cyst, it is uncommon.

Diagnosis

Pineocytomas are diagnosed from tissue, i.e. a brain biopsy.

They consist of:

  • cytologically benign cells (with nuclei of uniform size, regular nuclear membranes, and light chromatin) and,
  • have the characteristic pineocytomatous/neurocytic rosettes, which is an irregular circular/flower-like arrangement of cells with a large meshwork of fibers (neuropil) at the centre.

    • Pineocytomatous/neurocytic rosettes are superficially similar to Homer Wright rosettes; however, they differ from Homer Wright rosettes as they have (1) more neuropil at centre of the rosette and, (2) the edge of neuropil meshwork irregular/undulating.

    References

    Pineocytoma Wikipedia
    (Text) CC BY-SA


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