Demographics:
38 years old, Male
Indication:
Problems with vision
Findings
CT
- Large sellar and suprasellar mass which is mildly hyperattenuating relative to brain parenchyma
- No corresponding calcification
- Smooth expansion of the sella
MRI
- T1/T2 isointense, homogeneously enhancing sellar and suprasellar mass measuring 2.5 x 2.4 x 4 cm
- Diffuse associated restricted diffusion
- Waist-like narrowing of the mass in the region of the diaphragma sellae
- The mass contacts and uplifts the optic chiasm
- Tumor extends beyond the lateral carotid tangent line on the right and slightly beyond the intercarotid line on the left with partial encasement of the bilateral internal carotid arteries
Annotated Images & Illustrations
Diffusely enhancing sellar and suprasellar mass with waist-like narrowing in the region of the diaphragma sellae (red arrows).
Tumor extends beyond the lateral tangent line on the right (yellow line) and the intercarotid line on the left (blue line).
Knosp classification system.
Diagnosis
Pituitary macroadenoma
Key Imaging Features
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Differential Diagnosis
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Discussion
Pearls
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