Dr. CHAN Kin Ming Kevin

Tonsils are located at the back of a child’s tongue (lingual tonsils) and on both sides of the throat (palatine tonsils). They produce lymphocytes and antibodies to help fight against bacteria and viruses entering through the upper respiratory tract like adenoids. In children’s puberty, their immune system matures, the tonsils’ immune activity decreases, and the tonsils gradually shrink and lose function, becoming less important in overall immunity.

鼻咽癌 （英文：Nasopharyngeal Carcinoma, NPC）是因鼻咽腔部位細胞異常生長而形成的惡性腫瘤，亦是本港最常見的頭頸部癌症。鼻咽位於頭部中央，鼻咽及鼻竇後方的位置，並與下方的口腔相通。

鼻竇分佈於鼻及眼睛周圍，是位於顱骨內部的空腔構造，鼻竇內的粘膜有助將空氣中的塵埃和廢物吸住及排出，亦可調節吸入空氣的溫度和濕度。