Erdheim-Chester Disease: A Rare Clinical Entity

Area of Science:

• Cardiology
• Oncology
• Pathology

Background:

• Pericardial effusion presents diagnostic challenges, with Erdheim-Chester disease (ECD) being a rare but important consideration.
• Idiopathic pericardial effusion accounts for 10-20% of cases, highlighting the need for thorough investigation.

Purpose of the Study:

• To highlight Erdheim-Chester disease as a potential cause of pericardial effusion.
• To emphasize the importance of a multidisciplinary diagnostic approach for rare conditions.

Main Methods:

• Case report of an 88-year-old woman presenting with symptoms suggestive of pericardial effusion.
• Diagnostic workup included chest X-ray, echocardiogram, thoraco-abdomino-pelvic CT scan, and perirenal mass biopsy.

Main Results:

• Echocardiogram revealed a moderate pericardial effusion.
• CT scan identified a bilateral perirenal soft tissue halo.
• Biopsy confirmed diffuse infiltration by foamy histiocytes (CD68+), consistent with ECD.

Conclusions:

• Erdheim-Chester disease is a rare, multi-systemic non-Langerhans cell histiocytosis.
• Diagnosis relies on integrating clinical presentation, radiological evidence, and histological confirmation.
• High diagnostic suspicion is crucial for identifying this rare condition.