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Pituitary gland. Variable signal intensities on MRI. A pictorial essay
R D Caruso1, A E Rosenbaum, R G Sherry
1Department of Radiology S.U.N.Y. Health Science Center, Syracuse, New York 13210, USA.
Clinical Imaging
|October 2, 1998
Abstract:
The anterior pituitary gland may exhibit high signal on T1-weighted (T1w) images and/or low signal on T2-weighted (T2w) images in several normal and pathological states. High T1w signal may be seen in normal fetuses, neonates, and in pregnant and postpartum women. It may also occur in Rathke's cleft cyst, craniopharyngioma, subacute hemorrhage, manganese deposition, melanoma, dermoid, and lipoma. Low T2w signal may be seen in hemorrhage, calcification, cystic lesion, hemochromatosis, melanoma, and vascular lesions. These are described and illustrated.