Presentation and Demographics - Benign lymphoepithelial lesion occurs most commonly in adults around 50 years of age. - Approximately 60-80% of those affected are female. - The gland affected shows diffuse swelling. - The swelling can be asymptomatic or associated with mild pain. - This condition is often seen in individuals with HIV infection.

Locations - In 80% of cases, the parotid gland is affected. - Lacrimal glands can also be affected.

Histology - Histological examination shows a marked lymphoplasmacytic infiltration. - Lymphoid follicles surround solid epithelial nests, forming epimyoepithelial islands. - Excess hyaline basement membrane material is deposited between cells. - Acinar atrophy and destruction can be observed.

Treatment - Observation is usually the preferred approach unless the patient has concerns or experiences pain, drainage, or other symptoms related to the lesion. - Surgical removal of the affected gland may be recommended in certain cases. - Aspiration can be performed as an alternative treatment option, which can be repeated multiple times. - Aspiration is commonly performed in debilitated individuals or when the risks of surgery outweigh the benefits. - Prognosis is generally good, but in rare cases, the condition may progress to lymphoma or represent occult lymphoma from the beginning.

Eponym - Historically, bilateral parotid and lacrimal gland enlargement was referred to as Mikuliczs disease when it appeared independently from other diseases. - If the enlargement was secondary to another disease, such as tuberculosis, sarcoidosis, lymphoma, or Sjögrens syndrome, it was called Mikuliczs syndrome. - Both terms are derived from Jan Mikulicz-Radecki, a Polish surgeon who described these conditions. - However, Mikuliczs disease and Mikuliczs syndrome are considered ambiguous and outdated by some sources. - Today, Mikuliczs disease is classified as a subtype of IgG4-related disease, often involving multiple organs in the body.