Lymphoepithelioma

Lymphoepithelioma

Micrograph of lymphoepithelioma metastasis to a lymph node.

Lymphoepithelioma is a type of cancer that arises from the epithelial cells and is characterized by a prominent infiltration of lymphocytes. It is most commonly associated with the nasopharynx, but can also occur in other locations such as the salivary glands, thymus, and skin.

Pathophysiology

Lymphoepithelioma is a subtype of undifferentiated carcinoma and is often linked to Epstein-Barr virus (EBV) infection, particularly in nasopharyngeal cases. The tumor is composed of poorly differentiated epithelial cells intermixed with a dense lymphoid stroma. The presence of lymphocytes is a hallmark of this type of cancer and contributes to its name.

Clinical Presentation

Patients with lymphoepithelioma may present with symptoms depending on the location of the tumor. In the nasopharynx, common symptoms include nasal obstruction, epistaxis, and hearing loss due to Eustachian tube dysfunction. In other locations, symptoms may vary but often include a mass or swelling.

Diagnosis

Diagnosis of lymphoepithelioma typically involves a combination of imaging studies, such as CT scan or MRI, and histopathological examination of a biopsy specimen. The biopsy will reveal the characteristic undifferentiated epithelial cells and lymphoid infiltrate. Immunohistochemistry and EBV testing may also be used to support the diagnosis.

Treatment

The treatment of lymphoepithelioma depends on the location and stage of the tumor. Common treatment modalities include radiation therapy, chemotherapy, and surgical resection. In nasopharyngeal lymphoepithelioma, radiation therapy is often the primary treatment due to the tumor's radiosensitivity.

Prognosis

The prognosis for patients with lymphoepithelioma varies based on the tumor's location and stage at diagnosis. Nasopharyngeal lymphoepithelioma generally has a better prognosis compared to other types of nasopharyngeal carcinoma, especially when detected early and treated appropriately.

Related Pages

• Nasopharyngeal carcinoma
• Epstein-Barr virus
• Undifferentiated carcinoma
• Radiation therapy