Lymphoma of the nasolacrimal drainage system.

1. Primary lymphomas of the nasolacrimal system are rare. 2. Workup for suspected lesions should include careful history and physical examination, appropriate radiographic imaging including CT scanning, and adequate tissue biopsy. 3. Isolated lesions of the diffuse large cell subtype have a favorable prognosis with standard treatment modalities of either primary radiotherapy or chemotherapy. 4. Epiphora is an expected residual despite tumor control, and secondary dacryocystorhinostomy may be necessary.