J Korean Radiol Soc.  1989 Apr;25(2):194-198. 10.3348/jkrs.1989.25.2.194.

MR imaging of pituitary adenomas

• Han MH
• Chang KH
• Han MC

• KMID: 2359118
• DOI: http://doi.org/10.3348/jkrs.1989.25.2.194

Abstract

Fourty-five patients with pituitary adneoma were evaluated with MR imaging at 2.0T. There were 10microadenomas and 35 macroadenomas. In 30 cases, the tumor was demonstrated as solid nature and cystic changes,and hemorrhages could be characterized in 15 cases. The signal intensity of the solid portion of the tumor mainlyappeared as isointense with gray mater on T1 weighted images, and iso or slightly hyperintense on T2 weightedimags. Fluid-fluid levels of different intensity were seen in 8 out of 11 cases of hemorrhagic lesion, andlayering of hyperintense supernate and hypointense precipitate was demonstrated in all cases on both T1 and T2weighted images. Involvement of the parasellar structures by the tumor, particularly optic chiasm and cavernousportion of internal carotid artery, was accurately depicted on coronal and sagittal T1 weighted images. Thisexperience suggests the MRI could be done as a initial step of imaging modality in the evaluation of theclinically suspected pituitary adenomas and carotid angiography may be avoided in some cases.

MeSH Terms

Angiography
Carotid Artery, Internal
Hemorrhage
Humans
Magnetic Resonance Imaging*
Optic Chiasm
Pituitary Neoplasms*