Anatomy of the nasal cavity
Watery nasal discharge should arouse suspicion of CSF rhinorrhoea, especially if discharge is increased on bending forwards. Causes of CSF rhinorrhoea include:
- Fracture of the anterior skull base
- Iatrogenic following surgery
- Spontaneous leak
The current standard in diagnosis of anterior skull base fracture is CT (axial and coronal planes). Other investigations done as part of patient work-up could include glucose oxidase or transferrin analysis in nasal secretions.