Endocrine oncology

Radiological Surveillance for Pituitary Adenomas in Multiple Endocrine Neoplasia Type 1: A Longitudinal Cohort Study

J Clin Endocrinol MetabPublished Retrospective longitudinal cohort study

Authors' conclusion

In an overwhelming majority of patients with MEN1, radiological surveillance for nonfunctional pituitary adenomas offers minimal added benefit beyond patient-reported symptoms and pituitary function testing.

Study context

Population
Patients with genetically confirmed MEN1 evaluated at the NIH Clinical Center between 1977 and September 2024mean follow-up 14 ± 12 years
Participants
320 patients
Outcome
Cumulative proportion and rate of intervention for nonfunctional adenomas
Methodological detailssingle-centre
  • Single-centre

Main finding

As reported in the abstract

Intervention for nonfunctional adenomas · throughout follow-up

Patients with nonfunctional adenomas needing intervention

21 of 95

22%

Rate of intervention per 100 patient-years for nonfunctional adenomas

3.1%

CI 2.0–4.7%

Observational data: associations, not effects.

Further findings

Prevalence of pituitary adenomas

Pituitary adenomas
182/320 (57%)
Nonfunctional adenomas among adenomas
95/182 (52%)

Tumor volume stability of nonfunctional adenomas · mean 8.3 ± 6.1 years

Remained stable
38/48 (79%)

Magnetic resonance imaging (MRIs) for nonfunctional adenomas prompted by clinical or biochemical abnormalities

Prompted MRIs
42/518 (8.1%)
MRIs avoidable with individualized imaging per patient with nonfunctional microadenoma
≈4

Original publication

Radiological Surveillance for Pituitary Adenomas in Multiple Endocrine Neoplasia Type 1: A Longitudinal Cohort Study. J Clin Endocrinol Metab. Published 7 January 2026. doi:10.1210/clinem/dgaf704

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