According to the 2013 statistical report from the Hong Kong Cancer Registry of the Hospital Authority, nasopharyngeal cancer/carcinoma (NPC) is one of the ten most common cancers in Hong Kong. The incidence rate is three times higher for men than women. Studies have shown that 99% of nasopharyngeal tumours (carcinomas) contain the Epstein-Barr virus (EBV), which also causes glandular fever.