Is a stable or decreasing prolactin level in a patient with prolactinoma a surrogate marker for lack of tumor growth?

The optimal interval for follow-up imaging of patients with prolactinomas is unclear. We wish to determine the likelihood of tumor enlargement in patients with prolactinomas who have a stable or reduced prolactin (PRL) level over time, whether or not they are treated with a dopamine agonist (DA). We...

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