Pituitary apoplexy MRI
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Akshun Kalia M.B.B.S.[2]
Overview
MRI is done if the CT scan is suspicious for pituitary apoplexy. MRI is more sensitive than CT scan. MRI is more accurate in distinguishing the soft tissues of the pituitary from the surrounding bony structures. MRI is also superior to CT scan for detecting ischemia and infarction in brain tissue.
MRI
- MRI is done if the CT scan is suspicious for pituitary apoplexy. MRI is more sensitive than CT scan. MRI scan is more accurate in distinguishing the soft tissues of the pituitary from the surrounding bony structures. MRI is also superior to CT scan for detecting ischemia and infarction in brain tissue. MRI may show:
- Enlargement of the pituitary gland
- Compression of optic chiasm and surrounding structures[1]
- Hemorrhage evident by hyperintense center in the pituitary gland[2]
- Necrosis evident by hypointense center in the pituitary gland
_a_hyperintense_lesion_impinging_optical_chiasm_in_noncontrasted_T1-weighted_scan_and_(b)_a_peripheral_rim_in_a_contrasted_T1-weighted_scan.jpg)
- The above figure (image courtesy: Archives of Endrocrinology and Metabolism, ISSN 2359-4292 ) shows a sellar MRI depicting signs of an acute pituitary apoplexy in two patients (a) hyperintense lesion impinging optical chiasm in noncontrasted T1-weighted scan and (b) peripheral rim in a contrasted T1-weighted scan.[3]
References
- ↑ Cho WJ, Joo SP, Kim TS, Seo BR (2009). "Pituitary apoplexy presenting as isolated third cranial nerve palsy with ptosis : two case reports". J Korean Neurosurg Soc. 45 (2): 118–21. doi:10.3340/jkns.2009.45.2.118.
- ↑ Kupec JT, Goebel SU (2009). "The missing ring sign". Am. J. Med. 122 (12): e1. doi:10.1016/j.amjmed.2009.06.014. PMID 19958874.
- ↑ Glezer, Andrea; Bronstein, Marcello D. (2015). "Pituitary apoplexy: pathophysiology, diagnosis and management". Archives of Endocrinology and Metabolism. 59 (3): 259–264. doi:10.1590/2359-3997000000047. ISSN 2359-3997.