Erdheim-Chester Disease.

Area of Science:

• Neurology
• Radiology
• Oncology

Background:

• Erdheim-Chester disease is a rare non-Langerhans cell histiocytosis with variable clinical severity.
• Central nervous system (CNS) involvement is frequent, often manifesting as diabetes insipidus and cerebellar dysfunction.
• Neurologic imaging findings can be nonspecific and mimic other conditions.

Purpose of the Study:

• To review the imaging appearance, histologic features, clinical manifestations, and management of Erdheim-Chester disease.
• To highlight imaging findings suggestive of Erdheim-Chester disease for accurate radiologic diagnosis.
• To differentiate Erdheim-Chester disease from its mimickers.

Main Methods:

• Review of literature on Erdheim-Chester disease.
• Analysis of imaging findings in patients with Erdheim-Chester disease.
• Correlation of imaging findings with clinical and histologic features.

Main Results:

• Erdheim-Chester disease can range from asymptomatic incidental findings to fatal multisystem disease.
• CNS involvement occurs in up to 50% of patients, commonly causing diabetes insipidus and cerebellar dysfunction.
• Specific imaging patterns, though often nonspecific, can strongly suggest Erdheim-Chester disease.

Conclusions:

• Accurate diagnosis of Erdheim-Chester disease relies on recognizing characteristic imaging manifestations.
• Radiologists play a key role in identifying suggestive findings to aid in diagnosis.
• Comprehensive understanding of clinical, histologic, and imaging features is essential for patient management.