pituicytoma


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pi·tu·i·cy·to·ma

(pi-tū'i-sī-tō'mă),
A rare gliogenous neoplasm derived from pituicytes, occurring in the posterior lobe of the pituitary gland and characterized by cells with relatively small, round or oval nuclei and long branching processes that form a complex network of cytoplasmic material, in which numerous small droplets of fat may be demonstrated.
[pituicyte + G. -oma, tumor]

pituicytoma

An obsolete, nonspecific term for a tumour of the neurohypophysis.

pi·tu·i·cy·to·ma

(pi-tū'i-sī-tō'mă)
A rare gliogenous neoplasm derived from pituicytes, occurring in the posterior lobe of the pituitary gland and characterized by cells with small nuclei and long processes that form a network of cytoplasmic material, in which droplets of fat may be demonstrated.
[pituicyte + G. -oma, tumor]

pituicytoma

a neoplasm of the neurohypophysis.
References in periodicals archive ?
sup][5] In addition, thyroid transcription factor-1 (TTF-1) expression in nontumorous pituicytes, pituicytoma, and GCT of neurohypophysis indicated a common pituicyte lineage.
The best way to make differential diagnosis between pituicytoma and GCT was that there were no Rosenthal filaments and eosinophilic granules in pituicytoma.
Newly codified glial neoplasms of the 2007 WHO Classification of Tumours of the Central Nervous System: angiocentric glioma, pilomyxoid astrocytoma and pituicytoma.
Pituicytoma presenting with spontaneous hemorrhage.
5%); all other lesions, such as hypophysitis, pituicytoma, spindle cell oncocytoma, and granular cell tumor of neurohypophysis, are rare lesions.
Normal posterior gland is unlikely to be mistaken for a pituitary adenoma, but can readily be misinterpreted as a fibrous meningioma or even an uncommon pituitary region tumor to be discussed below, the pituicytoma.
Pituicytoma is a distinct low-grade glioma arising from pituicytes of the neurohypophysis and infundibulum.
To date, there is only one report that mentioned dynamic gadolinium-enhanced images of pituicytoma and demonstrated early homogeneous enhancement of the tumor,[sup][2] rather than the gradual enhancement commonly seen with pituitary adenomas.
The pituicytoma, or infundibuloma, is a rare tumor of the sellar region that displays a spindle cell morphology, fascicular arrangement of tumor cells, and variable glial fibrillary acidic protein (GFAP) immunoreactivity.
3-5) In this study, we present the histologic, immunohistologic, and ultrastructural features of 2 cases of pituicytoma and demonstrate genomic copy number imbalances associated with this unique neoplasm by using array-based comparative genomic hybridization (array CGH).
We report a case of pituicytoma and compare its immunophenotypic characteristics with those of normal neurohypophysis and other low-grade spindled lesions of the sellar compartment.
However, the histogenesis of these tumors is controversial, evident by various terms in the literature that have attempted to describe GCT, including choristoma, tumorlet, myoblastoma, and pituicytoma.