Inflammatory lesions of the lung, submandibular gland, bile duct and prostate in a patient with IgG4‐associated multifocal systemic fibrosclerosis

:  Multifocal systemic fibrosclerosis (MSF) is a multisystem disease, which often mimics malignancy. A 70‐year‐old asymptomatic man with lesions in the lung, prostate, submandibular glands and bile ducts appeared to have malignancy. Biopsy of a lung nodule showed IgG4‐positive plasma cell infiltrati...

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