Non-Hodgkin lymphomas of Waldeyer's ring.

Lymphomas represent malignant lymphoproliferative diseases and they are generally classified as Hodgkin's (HL) or non-Hodgkin malignant lymphomas (NHML). Head and neck lymphomas represent one of the most common sites of extranodal lymphomas, second after the gastrointestinal tract. Waldeyer's ring structures include the palatine tonsils, the nasopharyngeal lymphatic tissue, and the lingual tonsil. We investigated 38 patients with malignant lymphoma with ages ranging from 21 to 95 years, all localized in the Waldeyer's ring. Good knowledge of the clinical characteristics of these lymphomas and the methods to establish the differential diagnosis are essential for a correct therapy of the disease.