**5. Non-Hodgkin lymphoma**

Its etiology comes from the chronic stimulation of B cells and its incidence occurs with late manifestations, mainly located in the gingiva. For more than 30 years the relationship between immunodeficiency and non-Hodgkin's lymphoma is known, relating to AIDS. Non-Hodgkin's lymphoma is evidenced by polygamous hypergammaglobulinemia, cytokines, and growth factors: 11–6; 11–10. Since the beginning of the epidemic the CDC defines HIV+ patients with a diagnosis of non-Hodgkin's lymphoma as AIDS [17].

The diagnosis may be clinical, associated with biopsy, radiographs, CT scans, MRI [17].
