Pituitary Adenoma
Understanding Pituitary Adenoma found on Sella Magnetic Resonance Imaging imaging. Learn what this finding means and what steps to take next.
Radiographic Appearance
Magnetic Resonance Imaging FindingIso- to hypointense sellar mass on T1 with variable enhancement; may expand sella or invade cavernous sinus.
Clinical Significance
Can cause hormonal excess/deficit and optic chiasm compression.
What is a Pituitary Adenoma?
Benign tumor of the pituitary gland. MRI with dynamic contrast characterizes size and invasion.
Imaging Appearance
- Microadenoma ＜10 mm; macroadenoma ≥10 mm
- Delayed or hypointense enhancement relative to normal gland
- Suprasellar extension may lift optic chiasm
- Cavernous sinus invasion possible
Clinical Significance
- Endocrine effects (prolactin, ACTH, GH) or mass effect
- Guides medical vs surgical therapy
Symptoms
- Headache, visual field loss, hormonal symptoms (galactorrhea, Cushingoid features)
Diagnosis
- MRI pituitary with dynamic contrast
- Hormone panel per endocrinology
Treatment
- Dopamine agonists for prolactinoma
- Transsphenoidal surgery for mass effect or non-prolactin macroadenomas
- Radiation for residual/recurrent disease
Prognosis
- Generally good; depends on subtype and invasion
What Should You Do?
- Obtain endocrine evaluation and visual field testing.
- Adhere to medical therapy if prescribed.
- Follow MRI surveillance schedule.
Medical Disclaimer: Educational only; follow endocrinology/neurosurgery advice.
Correlate with Lab Results
Doctors often check these blood tests when Pituitary Adenoma is found on imaging:
Related Imaging Terms
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