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Clinical Course of Nonfunctional Pituitary Microadenoma in Children: A Single-Center Experience
Vidhu V Thaker1,2, Adrianne E Lage3, Garima Kumari4
1Division of Molecular Genetics, Department of Pediatrics, Columbia University Medical Center, New York, New York.
Context:
Pituitary lesions consistent with microadenomas are increasingly discovered by MRI. Sparse data are available on the long-term clinical and imaging course of such lesions in children.
Objective:
The aim of this study was to define the clinical and imaging course of pituitary lesions representing or possibly representing nonfunctioning microadenomas in children to guide clinical management.
Design:
Retrospective observational study.
Methods:
The clinical data warehouse at a tertiary care academic children's hospital was queried with the terms "pituitary" AND "microadenoma" and "pituitary" AND "incidentaloma." The electronic health records of the identified subjects were reviewed to extract data on the clinical and imaging course.
Results:
A total of 78 children had nonfunctioning pituitary lesions incidentally discovered during clinical care, of which 44 (56%) were reported as presumed or possible microadenomas. In the children with microadenoma (median age 15 years, interquartile range 2), a majority (70%) underwent imaging for nonendocrine symptoms, the most common being headache (n = 16, 36%). No significant increase in the size of the microadenoma or cysts or worsening of pituitary function was seen over the average clinical follow-up of 4.5 ± 2.6 years. Four cases of drug-induced hyperprolactinemia resolved with discontinuation of the offending medication.
Conclusions:
Asymptomatic pituitary lesions representing cysts, microadenomas, or possible microadenomas follow a benign course in children. In the absence of new endocrine or visual symptoms, repeat MRI may not be needed, and if performed, should be done in no less than a year. When possible, it is prudent to discontinue hyperprolactinemia-inducing medications before imaging.
Insights
Pediatric pituitary microadenomas discovered incidentally on MRI scans typically follow a benign clinical and imaging course. Repeat imaging may not be necessary if patients remain asymptomatic, guiding management for these common findings.
Area of Science:
- Pediatric Endocrinology
- Neuroradiology
- Clinical Pediatrics
Background:
- Pituitary microadenomas are increasingly detected in children via MRI.
- Limited data exist on the long-term outcomes of these pediatric pituitary lesions.
Purpose of the Study:
- To characterize the clinical and imaging trajectory of pituitary lesions, including nonfunctioning microadenomas, in children.
- To provide evidence-based guidance for managing incidentally discovered pituitary microadenomas in pediatric patients.
Main Methods:
- Retrospective observational study design.
- Querying a clinical data warehouse for pituitary lesions (microadenoma, incidentaloma).
- Review of electronic health records for clinical and imaging data.
Main Results:
- 44 of 78 children had presumed or possible microadenomas (median age 15 years).
- Most children (70%) were imaged for nonendocrine symptoms like headaches.
- No significant changes in microadenoma size, cyst development, or pituitary function were observed over ~4.5 years of follow-up.
- Drug-induced hyperprolactinemia resolved upon medication cessation.
Conclusions:
- Asymptomatic pituitary lesions (cysts, microadenomas) in children exhibit a benign clinical course.
- Routine repeat MRI may be unnecessary for asymptomatic pediatric pituitary lesions; if performed, intervals should exceed one year.
- Discontinuation of medications inducing hyperprolactinemia is advisable prior to pituitary imaging when feasible.
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