Cell-mediated immunity in nasopharyngeal carcinoma and allergic rhinitis: A controlled study

We conducted a prospective study of 60 patients in a tertiary care referral center to ascertain the status of cell-mediated immunity as determined by delayed hypersensitivity reactions in patients with nasopharyngeal carcinoma (NPC) or allergic rhinitis. Delayed hypersensitivity as detected by Mantoux testing is generally accepted as a reflection of the level of cell-mediated immunoactivity-the less hypersensitivity reaction that occurs, the lower the level of immunoactivity is, and vice versa.