已有研究表明:正常情况下咽鼓管腺体是局限在咽鼓管软骨部的粘膜下。在12孕周胎儿从咽口处开始形成,至27孕周停止,咽鼓管骨部则无腺体形成。这些腺体为管状腺泡的浆液粘液性腺体,有分泌浆液及粘液的功能。同样亦已有人发现在临床表现正常的和病 Studies have shown that under normal circumstances eustachian tube gland is confined to the submucosal eustachian tube cartilage. At 12 weeks of gestation fetus began to form from the pharyngeal orifice, to 27 weeks of gestation to stop, no eustachian tube bone formation. These glands are tubular mucoid glands of the acinar of the tube that function to secrete serous fluid and mucus. The same has also been found in the clinical manifestations and disease