Lip gland histopathology in Sjögren's disease

(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.