Pituitary adenoma MRI: Difference between revisions

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Revision as of 19:03, 12 September 2012

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Tumors which cause visual difficulty are likely to be macroadenomata greater than 10 mm in diameter; tumors less than 10 mm are microadenomata.

The diagnosis is confirmed by testing hormone levels, and by radiographic imaging of the pituitary (for example, by CT scan or MRI).

Patient #1: Pituitary marcoadenoma

Patient #2: MRI images demonstrate a pituitary marcoadenoma

@@ Line 1: / Line 1: @@
+__NOTOC__
 {{Pituitary adenoma}}
 {{CMG}}
 ==Overview==
-'''Pituitary adenomas''' are [[tumor]]s that occur in the [[pituitary gland]], and account for about 10% of intracranial [[neoplasia|neoplasms]]. They often remain undiagnosed, and small pituitary tumors are found in 6 to 24 percent of adults at autopsy.
-Pituitary adenomas arise within the anterior lobe (adenohypophysis) of the gland . Tumors less than 1 cm are called micro adenomas. Clinical symptoms depend on whether the tumor is secreting or nonsecreting. Nonsecreting adenomas grow and compress adjacent structures, most commonly causing a bitemporal hemianopsia due to chiasmatic compression. Lateral extension into the cavernous sinuses can result in cranial nerve palsies.
 ==MRI==
 Tumors which cause visual difficulty are likely to be ''macroadenomata'' greater than 10 mm in diameter; tumors less than 10 mm are ''microadenomata''.