Granular cell tumor of the pituitary stalk. Case report.
The case is described of a granular cell tumor of the pituitary stalk in a 40-year-old woman with secondary amenorrhea. A computerized tomography scan showed a large contrast-enhancing mass, and T1-weighted magnetic resonance images demonstrated a tumor isointense to the brain parenchyma with nonhomogeneous enhancement after intravenous administration of gadolinium diethylenetriamine penta-acetic acid. Histopathological examination, especially immunocytochemical and electron microscopic studies, showed elements supporting an astrocytic origin for this type of tumor, a hypothesis advanced by many authors but still controversial.
Lafitte
C
C
Department of Neurosciences, C.H.U. Bretonneau, Tours, France.
Aesch
B
B
Henry-Lebras
F
F
Fetissof
F
F
Jan
M
M
D000328:Adult; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D016586:Granular Cell Tumor / Q000175:diagnosis* / Q000648:ultrastructure; D006801:Humans; D007150:Immunohistochemistry; D008279:Magnetic Resonance Imaging; D008854:Microscopy, Electron; D009942:Organometallic Compounds; D004369:Pentetic Acid / Q000031:analogs & derivatives; D010911:Pituitary Neoplasms / Q000175:diagnosis* / Q000648:ultrastructure; D014057:Tomography, X-Ray Computed
D003287:Contrast Media; D009942:Organometallic Compounds; D004369:Pentetic Acid; D019786:Gadolinium DTPA