Table 1: Summary of three case reports.

 Case 1Case 2Case 3

Age, gender77 years old, male59 years old, female61 years old, male
Swelling of the submandibular glandBoth sidesInitially, on the right side; after a period of time, on the left sideRight side
Serum amylaseWithin normal rangeWithin normal rangeWithin normal range
Serum SS-A antibodyNegativeNegativeNegative
Serum SS-B antibodyNegativeNegativeNegative
Serum IgG
(863–1589 mg/dL)
Serum IgG4
(4–108 mg/dL)
IgG4-positive plasma cells in salivary gland tissuePositivePositivePositive
Chronic sclerosing sialadenitisChronic sclerosing sialadenitisChronic sclerosing sialadenitis
Other organ lesionsNoNoNo
Other image findingsnoneIntense uptake on PET Decrease in accumulations on salivary gland scintigraphy