You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Histologically intense lymphocytic infiltration of the gland replacing the acinar structures, but preserving the lobular architecture seen in: and explain in detail?
The three types of histologic alterations seen in Sjogren's syndrome are as follows: 

Intense lymphocytic infiltration of the gland replacing the acinar structures, but preserving the lobular architecture.
Proliferation of the ductal epithelium and myoepithelium to form epimyoepithelial islands
Atrophy of the glands sequential to the lymphocytic infiltration.