head and neck neoplasms comprise 7.1 % of all tumours diagnosed in this hospital and the commonest sites of involvement are the nasopharynx ( 29.1 % ) , cervical lymph nodes ( 22.6 % ) , oral cavity ( 10.2 % ) , thyroid ( 8.2 % ) and skin ( 6.5 % ) .
C0018670
head
C0226896
oral cavity