Overview: Prolactin TestIntroduction: The Prolactin Test measures prolactin to diagnose pituitary disorders, causing infertility or fatigue. Aligned with 2023 Endocrine Society guidelines, it uses biochemical methods for high specificity, supporting hormonal screening. This test is critical for guiding diagnosis, treatment planning, and improving outcomes in endocrinology for patients with suspected prolactinomas or pituitary dysfunction.
Other Names: Prolactin Assay, PRL Test.
FDA Status: Laboratory-developed test (LDT), meeting endocrinology standards for diagnostic accuracy.
Historical Milestone: Prolactin testing began in the 1970s with pituitary research. Biochemical methods improved in the 2000s, enhancing diagnostic precision.
Purpose: Measures prolactin to diagnose pituitary disorders, guides treatment, and evaluates patients with infertility or fatigue.
Test Parameters: 1. Prolactin Level
Pretest Condition: Fasting for 10-12 hours required. Collect serum or plasma. Report history of infertility, fatigue, or pituitary symptoms.
Specimen: Serum (SST, 2-5 mL), Plasma (EDTA, 2-4 mL). Transport in a biohazard container.
Sample Stability at Room Temperature: 8 hours
Sample Stability at Refrigeration: 7 days
Sample Stability at Frozen: 6 months
Medical History: Document infertility, fatigue, or history of pituitary disorders. Include current medications, especially dopamine agonists.
Consent: Written consent required, detailing the tests purpose, pituitary disorder implications, and risks of sample collection.
Procedural Considerations: Uses immunoassays to measure prolactin levels. Results are available in 1-2 days, supporting clinical decisions. Performed in laboratories, often for pituitary disorder diagnosis.
Factors Affecting Result Accuracy: Improper fasting or stress can affect results. Medications like antipsychotics may elevate prolactin.
Clinical Significance: Elevated prolactin confirms prolactinoma or pituitary dysfunction, guiding dopamine agonist therapy. Normal levels may require MRI.
Specialist Consultation: Consult an endocrinologist or neurologist for result interpretation and treatment planning.
Additional Supporting Tests: Pituitary MRI, thyroid function tests, or IGF-1 levels to confirm pituitary disorder diagnosis.
Test Limitations: Non-specific for certain pituitary conditions; clinical correlation is needed. Sample quality affects sensitivity.
References: Endocrine Society Pituitary Guidelines, 2023; Journal of Clinical Endocrinology, Melmed S, 2022.
