Pulmonary IgG4‐related disease and colon adenocarcinoma: possible paraneoplastic syndrome

Malignancy has a complicated association with immunoglobulin G4‐related disease (IgG4‐ RD ) both being an item in the differential diagnosis as well as malignancy occurring in the background of IgG4‐ RD in the same organ. However, recently there is evidence of higher rates of distant malignancy in patients with IgG4‐ RD . Here we report a case of pulmonary IgG4‐ RD potentially consistent with a paraneoplastic phenomenon which improved with...