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Figure 1: Lesions in a patient with IgG4-related disease. (a) Head MRI on a T2-weighted image, sagittal section. A pituitary mass of 30 mm was detected (arrow). (b) Chest CT shows a nodule in the right lung (arrow). (c) Abdominal CT shows that part of the left kidney was not enhanced with contrast media (arrow). (d) 67Gallium accumulated abnormally in the pituitary gland, both sides of the neck, both lungs, both kidneys, and the left inguinal area (arrows).