Pituitary Imaging Abnormalities and Related Endocrine Disorders in Erdheim-Chester Disease

Area of Science:

• Endocrinology
• Neuroimaging
• Rare Diseases

Background:

• Erdheim-Chester disease (ECD) is a rare non-Langerhans cell histiocytosis with potential multi-organ involvement.
• Pituitary gland abnormalities and endocrine dysfunction are increasingly recognized complications in ECD.
• Understanding the spectrum of pituitary involvement is crucial for comprehensive patient management.

Purpose of the Study:

• To investigate the prevalence of abnormal pituitary imaging (API) in patients with ECD.
• To identify associations between API and specific endocrine dysfunctions, including diabetes insipidus (DI) and panhypopituitarism.
• To explore relationships between API and clinical/laboratory parameters in ECD.

Main Methods:

• Cross-sectional descriptive study of a natural history cohort of 61 ECD subjects.
• Assessment included endocrine testing for anterior and posterior pituitary function.
• Dedicated pituitary MRI scans were performed to evaluate imaging abnormalities.

Main Results:

• Abnormal pituitary imaging (API) was detected in 47.5% of ECD subjects.
• Common abnormalities included loss of the posterior pituitary bright spot, thickened pituitary stalk, abnormal enhancement, and atrophy.
• API was significantly associated with higher rates of DI and panhypopituitarism.

Conclusions:

• A substantial proportion of ECD patients exhibit API and related endocrinopathies.
• API serves as a potential indicator for DI and panhypopituitarism in ECD.
• Comprehensive evaluation of hypothalamic-pituitary function is recommended for all ECD patients.