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2015•Chinese Journal of CT and MRIRequires access

The Invasive Signs on MRI of Invasive Pituitary Adenomas

Lan Yi-fen

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Abstract

Objective To explore the invasive signs on MRI of invasive pituitary adenomas(IPA). Methods A total of 48 patients with giant pituitary adenoma diagnosed by MRI were analyzed, in which, 42 cases were confirmed by surgery. Results The appearance of the tumor was iso-intense on T1 WI, iso-intense or high-intense on T2 WI, and homogeneously or heterogeneously enhanced after Gd-DTPA injection. MRI findings of invasiveness included encasement of internal carotid artery, invasion of the sella turcica and adjacent bones, involvement of sphenoid sinus and cavernous sinus. 19 cases with grade-4 invasion and 8 cases with grade-3 invasion on MRI were confirmed involvement of cavernous sinus and encasement of internal carotid artery wholly or partly by surgery. Conclusion MRI results have good consistency with the operation. MRI is helpful in evaluating the invasion of pituitary adenomas before operation, which is of great clinical significance for the management of the disease.

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Objective To explore the invasive signs on MRI of invasive pituitary adenomas(IPA). Methods A total of 48 patients with giant pituitary adenoma diagnosed by MRI were analyzed, in which, 42 cases were confirmed by surgery. Results The appearance of the tumor was iso-intense on T1 WI, iso-intense or high-intense on T2 WI, and homogeneously or heterogeneously enhanced after Gd-DTPA injection. MRI findings of invasiveness included encasement of internal carotid artery, invasion of the sella turcica and adjacent bones, involvement of sphenoid sinus and cavernous sinus. 19 cases with grade-4 invasion and 8 cases with grade-3 invasion on MRI were confirmed involvement of cavernous sinus and encasement of internal carotid artery wholly or partly by surgery. Conclusion MRI results have good consistency with the operation. MRI is helpful in evaluating the invasion of pituitary adenomas before operation, which is of great clinical significance for the management of the disease.

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Available abstract

Objective To explore the invasive signs on MRI of invasive pituitary adenomas(IPA). Methods A total of 48 patients with giant pituitary adenoma diagnosed by MRI were analyzed, in which, 42 cases were confirmed by surgery. Results The appearance of the tumor was iso-intense on T1 WI, iso-intense or high-intense on T2 WI, and homogeneously or heterogeneously enhanced after Gd-DTPA injection. MRI findings of invasiveness included encasement of internal carotid artery, invasion of the sella turcica and adjacent bones, involvement of sphenoid sinus and cavernous sinus. 19 cases with grade-4 invasion and 8 cases with grade-3 invasion on MRI were confirmed involvement of cavernous sinus and encasement of internal carotid artery wholly or partly by surgery. Conclusion MRI results have good consistency with the operation. MRI is helpful in evaluating the invasion of pituitary adenomas before operation, which is of great clinical significance for the management of the disease.

Key concepts: Medicine, Cavernous sinus, Internal carotid artery, Pituitary adenoma, Radiology, Sella turcica, Transsphenoidal surgery, Magnetic resonance imaging

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