Endocrine manifestations of Erdheim-Chester disease (a distinct form of histiocytosis)

Area of Science:

• Endocrinology
• Histiocytosis
• Rare Diseases

Background:

• Erdheim-Chester disease (ECD) is a rare histiocytic disorder of unknown cause.
• It involves proliferation of lipid-laden histiocytes, leading to multi-organ system involvement.
• Clinical presentation and severity vary widely among affected individuals.

Observation:

• This report details a woman with multi-organ ECD.
• She presented with central diabetes insipidus, hyperprolactinaemia, gonadotropin insufficiency, and decreased IGF-1, indicating hypothalamic-pituitary dysfunction.
• Magnetic resonance imaging showed absent posterior pituitary high-intensity signal, but no sellar mass or stalk thickening. Bilateral adrenal enlargement was also noted.

Findings:

• The case highlights ECD as a potential cause of neuroendocrine dysfunction.
• It demonstrates ECD's capacity to manifest with pituitary and adrenal abnormalities.
• The absence of typical sellar mass on MRI in the presence of pituitary dysfunction is a key observation.

Implications:

• ECD should be considered in the differential diagnosis of patients with unexplained neuroendocrine dysfunction and adrenal enlargement.
• This case underscores the importance of recognizing ECD's diverse and sometimes subtle endocrine manifestations.
• Further research into ECD's pathogenesis and diagnostic markers is warranted for improved patient outcomes.