Laryngocele is an uncommon disease defined as an abnormal dilatation or herniation of the laryngeal saccule, forming an air-filled cavity.

喉气囊肿是一种少见的疾病的异常扩张或球囊喉症的定义，形成一个充满空气腔。

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Sinusitis is inflammation of the nasal cavity and the sinuses, which are air-filled spaces located primarily in the jaw above the upper teeth and in the forehead around the eyes.

CNN: What can I do for my chronic sinusitis?