CASE HISTORY/CLINIC:
45 years old Patient with bilateral Hemianopsia.


FINDINGS:
The axial and sagittal T1-w show a homogeneous signal similar to gray matter. The T2-w image shows a well-circumscribed intra-, supra- and parasellar mass lesion with a somewhat inhomogeneous signal isodense to gray matter, which compresses and displaces the optic chiasma cranially.
Mass lesions around the the left internal carotid artery are more pronounced than on the right side with mainly infiltration of the cavernous sinus.
The postcontrast axial T1-w shows a discrete peripheral enhancement of the lesion.
The pituitary stalk is not well defined.


DIAGNOSIS:

Pituitary macroadenoma (> 1cm!).

DIFFERENTIAL DIAGNOSIS:
Craniopharyngeoma
Meningeoma

web resources:

1) Medizinfo
2) MRI-Library