Pitfalls in the staging of cancer of nasopharyngeal carcinoma.

Although nasopharyngeal carcinoma (NPC) is the most common primary malignancy of the nasopharynx, it is an uncommon malignancy in much of the Western world. Over the last several years, there have been important changes in the terminology used for histologic classification of NPC and important changes to the American Joint Committee on Cancer TNM staging of NPC. Accurate imaging assessment is critical for diagnose, to stage and plan radiation treatment, and for ongoing follow-up and surveillance. This article emphasizes important nasopharyngeal anatomy landmarks and the imaging appearances and pitfalls of NPC, its patterns of spread, and posttreatment appearances.