Rhinitis, whether allergic, infectious, or due to another aetiology, is an exceedingly common symptom in the population. Cerebrospinal fluid (CSF) rhinorrhoea occurs when there is a fistula between the dura and the skull base with discharge of CSF from the nose. Spontaneous CSF rhinorrhoea should be considered in the differential diagnosis of persistent nasal discharge called ‘runny nose’. We describe one case of CSF rhinorrhoea occurring in association with allergic rhinitis and sinusitis. A 46-year-old, obese female presented with a 1-week history of bilateral clear nasal discharge, undocumented fever, and postural headache. She described her nasal discharge as watery, and just like flows from the tap. A collected sample of her nasal discharge was tested for glucose and protein. CSF rhinorrhoea was considered as the primary diagnosis. Despite the whole work up, the origin of the CSF fistula could not be identified. She was discharged well for close follow up with no clinical sequelae. (Hong Kong j.emerg.med. 2016;23:57-60).
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机译：鼻炎，无论是过敏性，感染性还是其他病因引起的，是人群中极为常见的症状。当在硬脑膜和颅底之间存在瘘管且从鼻腔排出脑脊液时，会发生脑脊液鼻漏。在持续性流鼻涕（称为“流鼻水”）的鉴别诊断中，应考虑自发性CSF鼻炎。我们描述了与过敏性鼻炎和鼻窦炎有关的一例脑脊液鼻漏。一名46岁的肥胖女性，有1周的双侧清鼻涕，无证发热和体位性头痛的病史。她形容自己的鼻涕像水一样，就像水龙头里的水一样。对收集的鼻腔分泌物样本进行了葡萄糖和蛋白质测试。脑脊液鼻炎被认为是主要诊断。尽管进行了全部检查，但仍无法确定CSF瘘的起源。她出院良好，可以密切随访，没有临床后遗症。 （Hong Kong j.emerg.med.2016; 23：57-60）。
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