Background: The clinical picture of IgG4-related sclerosing disease (IgG4-RSD) may imitate lymphoma, and should be in the differential diagnosis of patients with this clinical picture. spine, retroperitoneal paraaortic area, bilateral parailiac areas, and bilateral perirenal spaces. Antinuclear and anti-SSA/SSB antibodies were unfavorable, and the serum IgG4 level was 740?mg/dL (normal, 8C140?mg/dL). Right parotid gland biopsy… Continue reading Background: The clinical picture of IgG4-related sclerosing disease (IgG4-RSD) may imitate