
Malignancy, vasculitis, and sarcoidosis all overlap with IgG4-related disease. The panel reviews key mimics by organ and contrasts manifestations needing immediate treatment with those suited to active surveillance.

Malignancy, vasculitis, and sarcoidosis all overlap with IgG4-related disease. The panel reviews key mimics by organ and contrasts manifestations needing immediate treatment with those suited to active surveillance.

IgG4-related disease can involve almost any organ and often begins without symptoms. The panel defines the condition, outlines who it affects, and describes the many ways it presents.