Classification Presumed diagnosis All cases with Cases with the of findings a finding finding not undiagnosed on visible on NECT NECT retrospectively Infective Meningeal 7 ([dagger]) 4 ([dagger]) enhancement Empyema/ 1 -- Abscess Vascular Arteriovenous 1 -- malformation Dural venous 2 2 sinus thrombosis Ischaemic Lacunar infarct 2 -- Neoplastic Meningioma 2 1 Pituitary mass 1 ([dagger]) -- Pituitary 2 1 microadenoma
Other Pituitary stalk 1 -- thickened Enhancing 3 3 nodule(s) Neurocystisercosis 1 -- Middle cranial 1 -- fossa lesion Total -- 24 11 NECT, non-contrast-enhanced computed tomography.
Gadolinium-diethylene triamine penta-acetic acid (Gd-DTPA)-enhanced magnetic resonance imaging (MRI) of the pituitary showed microadenoma
or hyperplasia measuring 6 x 4 mm on the right side of the pituitary gland (Figure 41.
His findings in the MRI report were that Ilene had an area of Hypointensity that was most typical for pituitary microadenoma
, but he noted that a small are of pituitary hemorrhage without tumor was not excluded.
Besides, some ACF with dysplasia are diagnosed as microadenoma
(20), adenoma (17) or in situ carcinoma (26) indicating sometimes that ACF presents preneoplastic lesions (27)
In patients with symptomatic chiasmal compression, urgent shrinkage of the tumour is important, whereas in patient with a microadenoma
, a less rapid escalation of dopamine agonists may be required.
Whether the patient has a microadenoma
or macroadenoma, Dr.
The pituitary microadenoma
was most likely an incidental finding; approximately 15 to 20% of "normal" individuals are found to have a pituitary adenoma on MRI.
Her conclusion was confirmed when she went to the UCLA Pituitary Tumor and Neuroendocrine Program, and physicians there confirmed the presence of an ACTH-secreting pituitary microadenoma
At the UCLA Pituitary Tumor and Neuroendocrine Program, physicians confirmed the presence of an ACTH-secreting pituitary microadenoma
Fat by itself also poses a risk, he notes, pointing to previous work in which his group found that animals on diets with 20 percent fat showed a 50 percent increase in microadenoma
development compared with animals receiving 5 percent fat.
Several cases of FSH-secreting microadenoma
with macroorchidism have been reported (8), (9).
33) A microadenoma
is a lesion up to 5 mm in diameter with the following typical features: (1) a trabecular growth pattern, (2) a distinct stromal component, and (3) immunopositivity for 1 hormone, with prevalence of glucagon.