Central nervous system. Central nervous system Guanghui Yu Radiology college . Central nervous system. Pituitary adenoma Pituitary adenoma is tumor arising from the cells of the pituitary gland
Central nervous system
upward toward the chiasm and hypothalamus
downward toward the sphenoid sinus
laterally toward the cavernous sinuses
ACTH: adrenocorticotrop(h)ic hormone
GH: growth hormone
TSH: thyrotropic-stimulating hormone
FSH: follicle-stimulating hormone
LH: luteotrop(h)ic hormone
coronal T1WIfollowing gadolinium injection
delayed a few minutes
A left-sided microadenoma, depressing and eroding focally the sella floor, remains hypointense with respect to the normally enhancing pituitary gland. In the delayed image a focal nodule of enhancement appears within the hypodense component
The patient has Cushing's disease.
coronal T1WI following gadolinium injection
coronal T1WI without contrast
Isointense space-occupying lesion originating from the sella turcica and extending bilaterally, mainly on the right side. The cavernous sinus is invaded on the right side, with encasement of the internal carotid artery .
following gadolinium injection of contrast. Marked homogeneous enhancement of the tumor. The superior suprasellar, inferior sphenoidal and lateral cavernous extension of the tumor is well seen. The sella turcica is markedly enlarged, the floor is depressed, the chiasm is compressed and elevated
coronal T1WI passing through the internal auditory canals. Arrow point on the barely seen intracanalicular neurinoma. axial T2WI. The lesion is not recognizable within the internal auditory canal on the left side. coronal and axial T1WI following gadolinium injection. Enhancement of the intracanalicular neurinoma (arrow).
Axial CT, bone window. The internal auditory canal on the right is expanded. axial and coronal T1WI following gadolinium injection. Enhancement of the neurinoma, that grows within the cerebellopontine angle cistern, compressing and displacing the brainstem.
Head of caudate nucleus
Genu of Corpus callosum
Splenium of Corpus callosum
4.2a. Post-contrast Axial T1 Wtd MRI
4.2b. Post-contrast Coronal T1 Wtd MRI