A case of nasal natural killer/T lymphoma revealed by repeated deep neck abscess.

A diagnosis of natural killer (NK)/T-cell lymphoma was clarified after repeated deep neck abscess in a 63-year-old man. The absolute number of lymphocytes was mildly decreased. Lymphopenia induced by latent malignant lymphoma in this case likely caused the immunodeficiency, which induced repeated infection in the head and neck region. We conclude that it is always necessary to consider diseases caused by immunodeficiency conditions, such as malignant lymphoma, into consideration in a case of repeated deep neck abscess.