Air that is inhaled through the mouth bypasses the nasal canal and the paranasal sinuses and is not filtered, warmed, and humidified as it is when inhaled through the nose.

从嘴巴进入的空气绕开了鼻泪管和鼻旁窦，不通过鼻腔的过滤、温暖和湿润就被人体直接吸入。

Methods ct findings in 16 patients with fungus infection of paranasal sinuses proved surgically and pathologically were analyzed.

方法分析16例经手术病理证实的真菌性鼻窦炎ct表现。

Cancer of the nasal passages affects the paranasal sinuses (the small cavities in the bone surrounding the nose) and the breathing passages in the nose.

鼻癌影响鼻旁窦（鼻旁骨质内的小腔腺）和鼻内的呼吸通道。

Objective: to study the usefulness of ct MPR in diagnosis of paranasal sinuses diseases, and to discuss whether the ct MPR can replace the direct coronal scanning.

目的：利用螺旋ct多平面重组技术探讨副鼻窦轴位扫描能否代替直接冠状位扫描。

Materials and Methods: 4 cases of paranasal sinuses carcinoma were diagnosed by CT.

材料与方法：4例副鼻窦癌均由CT作出诊断。

ObjectiveTo investigate the factors related with curative effect and prognosis of postoperative radiotherapy for nasal and paranasal sinuses carcinoma.

目的探讨影响鼻腔副鼻窦恶性肿瘤术后放疗效果与预后的因素。

Objective:To study the craniofacial surgery for the tumors of nasal cavity and paranasal sinuses invading the anteri6r skull base or the intracranial tissue.

目的：探讨累及前颅底或颅内脑组织的鼻腔鼻窦癌的手术切除途径及方法。

Besides, the primary tumor might extend to the nasal fossa (5 cases), paranasal sinuses and the base of the skull (5 cases).

此外，原发瘤可以扩展到鼻腔(5例)，副鼻窦和颅底(5例)。

Confounding factors are contamination of inhaled air with ambient no and contamination of exhaled air with no that has been produced in the paranasal sinuses and the nose.

混杂因素是吸入的空气污染与环境NO和呼出的空气污染与NO已生产的鼻窦和鼻子。

Mucoceles are encapsulated, expansile fluid collections in the paranasal sinuses which occur due to obstruction of a paranasal sinus ostium.

粘液囊肿是副鼻窦内一种包裹性，膨胀性囊性病变，是由于鼻旁窦窦口被阻塞所引起。

Methods ct findings of 18 cases with surgically and pathologically proven fungal infection of paranasal sinuses were retrospectively analyzed.

方法回顾分析经手术、病理证实的18例霉菌性副鼻窦炎的CT表现。