pituicyte


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pituicyte

[pə′tü·ə‚sīt]
(histology)
The characteristic cell of the neurohypophysis; these cells are pigmented and fusiform and are probably derived from neuroglial cells.
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Neurohypophysial GCT originated from the pituicytes which are modified as gliocytes of ependymal cell lineage located in the neurohypophysis and pituitary stalk.
However, the positive staining of GFAP was controversial though it normally expressed in the pituicytes.
In the NL, the structural plasticity is accompanied by a reorganisation of magnocellular terminals and adjacent pituicytes.
True plurihormonal adenomas with unusual combinations of hormonal types are uncommon (see algorithm, Figure 2) and the pathologist should always reexamine the specimen in such cases to exclude the possibility of entrapped normal anterior pituicytes, some of which can occasionally be found at the edges of adenoma fragments, admixed with and surrounded by adenoma cells.
By their morphology and immunostaining pattern, pituicytomas are thought to arise from pituicytes, specialized glial cells of the neurohypophysis.
The posterior lobe of the pituitary gland or neurohypophysis contains unique glial elements referred to as pituicytes.
The neurohypophysis is composed primarily of pituicytes, nerve fibers, axon terminals, and Herring bodies.