(A) High-power view showing a portion of a normal salivary gland lobule with mucous acini and a striated duct (arrow). (B) Low-power view showing a salivary gland lobule with two focal areas of lymphocytic infiltration (arrows). This histopathologic pattern is known as "focal lymphocytic sialadenitis" and is characteristic of Sjögren's syndrome. (C) High-power view of a lymphocytic infiltrate with a germinal center-like structure. These are present in approximately 20% of minor salivary gland biopsies.
