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Beyond normalization: rethinking optimal prolactin levels in prolactinoma management
Antoni Puzio1, Monika Hylinska1, Oliwer Kapała1
1Department of Public Health and Epidemiology, Poznan University of Medical Sciences, Poznań, Poland.
Expert Review of Endocrinology & Metabolism
|May 26, 2026
Summary
Optimal management of prolactinoma requires careful monitoring of prolactin (PRL) levels. Both insufficient and excessive PRL suppression can negatively impact outcomes, necessitating individualized treatment targets.
Area of Science:
- Endocrinology
- Oncology
- Pituitary Disorders
Background:
- Prolactinoma, a common pituitary tumor, presents diagnostic and therapeutic challenges.
- Treatment goals include normalizing prolactin (PRL) levels, but optimal targets remain debated.
- Variable clinical presentation, treatment resistance, and recurrence rates complicate management.
Purpose of the Study:
- To synthesize current evidence on optimal prolactin levels in prolactinoma management.
- To examine the role of PRL dynamics as a marker of treatment response.
- To identify predictors of remission and recurrence, and implications of hyper- and hypoprolactinemia.
Main Methods:
- A narrative literature search was conducted across major biomedical databases (PubMed, Embase, Scopus, Cochrane, Web of Science).
- The review focused on English-language studies from 2015-2026, including earlier foundational research.
- Evidence from clinical and observational studies was synthesized.
Main Results:
- Lower prolactin levels generally correlate with improved clinical outcomes.
- Excessively low prolactin levels may not indicate optimal therapy and can pose risks.
- Early prolactin trends are indicative of tumor response to treatment.
Conclusions:
- Individualized prolactinoma management requires defining optimal prolactin targets.
- Monitoring prolactin dynamics is crucial for assessing treatment response.
- Further research is needed to understand the risks of both hyper- and hypoprolactinemia.
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