Tanycytomas: a newly characterized hypothalamic-suprasellar and ventricular tumor.
We report five cases of tumors occurring in three children and in two adults. The tumors had unusual histomorphology and a mixture of ependymal and piloid-like astrocytic features and a myxoid stroma similar to myxopapillary ependymomas. MR imaging in three of the cases showed aggressive, intensely enhancing partially cystic hypothalamic-suprasellar masses near midline and near the floor of the third ventricle. In the three pediatric cases, the tumor encased the circle of Willis. This newly characterized tumor, the tanycytoma, has neoplastic cells with histomorphologic and ultrastructural characteristics similar to those of the tanycyte.
Lieberman
K A
KA
Department of Neuroradiology, State University of New York Upstate Medical University, Syracuse, New York, USA.
Wasenko
J J
JJ
Schelper
R
R
Swarnkar
A
A
Chang
J K
JK
Rodziewicz
G S
GS
D000328:Adult; D001254:Astrocytoma / Q000473:pathology; D002551:Cerebral Ventricle Neoplasms / Q000098:blood supply / Q000473:pathology*; D002675:Child, Preschool; D002941:Circle of Willis / Q000473:pathology; D004805:Ependyma / Q000473:pathology; D004806:Ependymoma / Q000473:pathology; D005260:Female; D006801:Humans; D007029:Hypothalamic Neoplasms / Q000098:blood supply / Q000473:pathology*; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D012658:Sella Turcica