General Principles and Management
Kenneth Hu
Anthony T.C. Chan
Peter Costantino
Louis B. Harrison
EPIDEMIOLOGY
The global incidence of nasopharyngeal carcinoma (NPC) is 84,400 new cases annually with 51,600 deaths.1 It is an endemic disease in Southern China, with incidence rates of 15 to 50 per 100,000 persons, making it the third most common cancer in men.2,3,4,5 However in the West, where it is associated with risk factors that are common to other cancers of the head and neck, NPC is a rare disease.5,6 There is an intermediate incidence in populations in Alaskan Eskimos and in the Mediterranean basin.4 The incidence rate rises after age 20 years and decreases after age 60 years, with a male-female ratio of 3:1. The median age of presentation is 40 to 50 years, which is significantly younger than that of other head and neck cancers.2,4 Young adults and children comprise up to 1% of all patients. However, in non-Asian areas (e.g., Northern/Central Africa), younger patients between 10 and 20 years comprise up to 15% of cases. In the United States, there is four- to sevenfold increased risk of NPC among southern Black children compared with the Caucasian population.7,8,9,10