Etiology, presentation, and outcomes of hyperprolactinemia due to pituitary masses in children and adolescents.
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PURPOSE: Hyperprolactinemia in children and adolescents can result from various etiologies, including pituitary masses. Understanding the underlying causes, clinical presentation, and outcomes is essential for effective management. METHOD: A retrospective cohort study was conducted, analyzing clinical data from patients diagnosed with hyperprolactinemia secondary to pituitary masses. The study included patients aged under 18 years, who were diagnosed between January 2018 and September 2024. Patients were classified into two groups: those with prolactinoma and those with non-prolactinoma causes, including non-functioning pituitary adenomas (NFPAs) and craniopharyngiomas. Serum prolactin levels, imaging studies, and treatment responses were assessed. RESULTS: A total of 33 patients with hyperprolactinemia attributed to pituitary masses were identified. The diagnoses among the patients were as follows: 54.5% had prolactinomas, 24.2% had NFPAs, and 21.2% had craniopharyngiomas. The age at diagnosis ranged from 8.4-17.9 years. In the prolactinoma group, the mean age at diagnosis was 15.6 ± 2.1 years, while in the non-prolactinoma group, it was 13.5 ± 2.9 years, and a statistically significant difference was observed (p = 0.024). The median prolactin level was 258 ng/mL (range: 30.5-14,35 0 ng/mL). According to the diagnoses, the median prolactin level was 491.5 ng/mL (range: 249-14,350 ng/mL) for prolactinomas, 45.6 ng/mL (range: 30.5-68.5 ng/mL) for NFPAs, and 61 ng/mL (range: 44-72 ng/mL) for craniopharyngiomas. Menstrual irregularities, headaches, and galactorrhea were the most commonly reported complaints. Overweight/obesity was present in 39.3% of the entire cohort, while patients with prolactinomas demonstrated a significant reduction in BMI SDS following cabergoline treatment. Cabergoline treatment achieved a 100% success rate in patients with prolactinomas. CONCLUSION: We observed a higher prevalence of hyperprolactinemia due to NFPAs and craniopharyngiomas compared to previous reports. Notably, obesity was prevalent among patients and demonstrated a favorable response to cabergoline therapy. These findings emphasize the necessity for future studies, particularly larger prospective trials incorporating genetic analyses, to enhance our understanding of the characteristics and treatment outcomes of pediatric hyperprolactinemia.