PMC5763108_01
Paravertebral soft tissue mass (a) before and (b) after treatment with prednisone.
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fig1
A subsequent CT done 5 months later showed a decrease in the paraspinal mass (Figure 1).
The submandibular gland shows extensive lymphoplasmacytic infiltrate intermixed with prominent fibrosis.
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fig2
The paravertebral mass shows dense fibrosclerosis with increased lymphoplasmacytic infiltrates, and IgG4 plasma cells are slightly increased.
CRIRH2017-4716245.003.jpg
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fig3
Although staining for IgG and IgG4 was limited by the level of background staining and areas of crush artifact within the tissue, there was an increase of IgG4 plasma cells (Figure 3).