Immunoglobulin G4-related Chronic Rhinosinusitis: A Pitfall in the Differential Diagnosis of Granulomatosis with Polyangiitis, Rosai-Dorfman Disease and Fungal Rhinosinusitis

Immunoglobulin G4 (IgG4)-related chronic rhinosinusitis (CRS) has recently been proposed to be a new clinical entity of nasal disease, with no consensually agreed criteria for diagnosis. Moreover, the pathological features if IgG4-related CRS often overlap with other sinonasal inflammatory and autoimmune diseases such as Granulomatosis with Polyangiitis (GPA), Rosai-Dorfman disease (RDD) and Fungal Rhinosinusitis (FRS). We aimed to explore the specific similarities and differences in clinicopathologic features between IgG4-related CRS, and GPA, RDD and FRS, in order that these conditions can be diagnosed more accurately.
Source: Human Pathology - Category: Pathology Authors: Source Type: research