Nasal cerebrospinal fluid (CSF) leak, also known as nasal liquorrhea or CSF rhinorrhea, is the leakage of cerebrospinal fluid through the nasal cavity caused by a defect in the skull base and the dura mater. This condition requires prompt diagnosis and treatment, as it carries a high risk of serious complications, including meningitis.
Causes of nasal CSF leak
- Traumatic causes: traumatic brain injury (fractures of the skull base, damage to the cribriform plate), surgical procedures involving the nasal cavity or paranasal sinuses (septoplasty, sinus surgery).
- Spontaneous causes: associated with increased intracranial pressure, such as idiopathic intracranial hypertension.
- Iatrogenic causes: occurring after neurosurgical procedures.
- Infectious causes: destruction of skull base bones due to osteomyelitis or tumors.
- Congenital causes: developmental anomalies, such as encephalocele.
Symptoms of nasal CSF leak
Main signs:
- Persistent or intermittent clear, watery nasal discharge.
- Leakage that increases when bending forward or during coughing or straining.
Associated symptoms:
- Headache.
- Reduced sense of smell (hyposmia or anosmia).
- Nasal congestion.
Complications:
- High risk of infections, particularly meningitis.
- Dizziness and photophobia.
Diagnosis
- Clinical evaluation: assessment of nasal discharge (CSF is typically clear and may contain glucose and protein).
- Laboratory testing: beta-2 transferrin analysis — a highly specific marker of cerebrospinal fluid.
- Imaging studies: contrast-enhanced computed tomography (CT), magnetic resonance imaging (MRI) with CSF fistulography, and radionuclide cisternography.
Treatment methods
Conservative treatment
Indications:
- Small-volume CSF leaks.
- Post-traumatic CSF rhinorrhea without complications.
Methods:
- Bed rest: head elevation to reduce cerebrospinal fluid pressure.
- Medication therapy: diuretics, antibiotics, analgesics, and supportive treatment as indicated.
- Activity restrictions: avoidance of physical exertion, sneezing, coughing, and straining.
Surgical treatment
The primary treatment option for persistent leaks, skull base defects, or the development of complications.
Main surgical approaches:
- Endoscopic endonasal surgery. Repair of the skull base defect through the nasal cavity using autologous tissues (fascia, cartilage, fat) or synthetic materials. This is the preferred method for traumatic and iatrogenic CSF leaks.
- Craniotomy. Used for large defects or when endoscopic repair is not feasible. Provides direct access to the skull base through an open cranial approach.
- CSF diversion procedures. Placement of a shunt to reduce intracranial pressure.
- Application of fibrin glue. Used to seal small defects and reinforce reconstruction.
Postoperative period
- Medication therapy: antibiotics to prevent infection, analgesics, and anti-edema agents.
- Rehabilitation: avoidance of physical exertion and regular ENT follow-up to monitor nasal cavity healing.
- Dynamic follow-up: periodic control CT or MRI scans and assessment of CSF dynamics.
In Belarus, treatment of nasal CSF leaks is provided at leading medical centers using modern diagnostic and surgical technologies. Highly qualified specialists ensure an individualized approach for each patient. Advanced equipment and affordable treatment costs make Belarus an attractive destination for international patients.
