Is there an unexpected region of uptake?
Yes. Vivid uptake is present in the pituitary fossa.
What is the most likely entity to present as incidental uptake in the pituitary region?
By far the most common pathology identified is pituitary macroadenoma.
PET scan demonstrates a focal region of increased uptake in the pituitary region. No other abnormal uptake identified in the rest of the body (not shown).