294-295 / 2351
NASOPHARYNX
EPIDEMIOLOGY
M
:F=2-3:1
Age:
China and South-East Asia: 5th-6th decade
North Africa: 2nd (20%) and 6th decade
Annual incidence in USA and Europe: <1/100,000
(
Nonkeratinizing differentiated carcinoma)
Annual incidence in China (Guangzhou) :
30/100,000
(
Nonkeratinizing undifferentiated
carcinoma)
mercoledì 29 giugno 16