Three cases of BRAF mutation negative Erdheim-Chester disease with a challenging distinction from IgG4-related disease

Erdheim-Chester disease (ECD) is a rare non-Langerhans histiocytosis with slow progression over the years that is particularly difficult to diagnose.
Source: Allergy, Asthma and Clinical Immunology - Category: Allergy & Immunology Authors: Tags: Letter to the editor Source Type: research