30多岁以后唾液腺随增龄而发生的退行性变化,已为人们所知,特别是腮腺的萎缩现象似乎更为显著。对这种随增龄出现的唾液腺萎缩现象,已在大唾液腺中进行了种种研究。并指出以嗜酸性粒细胞浸润,以及因腺上皮萎缩引起的纤维化和脂肪组织的增生作为组织学观 The degenerative changes in the salivary glands with age after the age of 30 have become known, and in particular the atrophy of the parotid gland seems to be more pronounced. For this phenomenon of salivary gland atrophy appearing with increasing age, various studies have been conducted in the large salivary glands. And pointed out that histological observations are based on infiltration of eosinophils and fibrosis and adipose tissue hyperplasia due to atrophy of glandular epithelium.