Chiari malformation is a structural disorder in which the cerebellum (and in some cases the brainstem) partially descends below the level of the foramen magnum, compressing the spinal cord and disrupting cerebrospinal fluid (CSF) circulation. Treatment is aimed at relieving symptoms, normalizing CSF dynamics, and preventing complications.
Types of Chiari malformation
- Type I: descent of the cerebellar tonsils through the foramen magnum. It is usually diagnosed in adolescence or adulthood.
- Type II (Chiari II malformation): typically occurs in children and is associated with myelomeningocele (a congenital spinal cord herniation).
- Type III: a severe form with herniation of the cerebellum and brainstem into the spinal canal.
- Type IV: cerebellar hypoplasia, usually incompatible with life.
Symptoms
Neurological symptoms:
- Headaches (especially in the occipital region, worsened by coughing or physical exertion).
- Impaired coordination (ataxia).
- Dizziness.
- Visual and hearing disturbances.
Symptoms of spinal cord compression:
- Numbness and weakness in the limbs.
- Pain in the neck and shoulders.
Disorders of cerebrospinal fluid dynamics:
- Hydrocephalus (increased intracranial pressure).
- Syringomyelia (formation of fluid-filled cavities within the spinal cord).
Diagnosis of Chiari malformation
- MRI of the brain and spinal cord.
- CT scan of the skull.
- Cisternography.
- Neurological examination.
Treatment methods for Chiari malformation
Conservative treatment
Indications: mild symptoms that do not significantly affect quality of life, absence of syringomyelia or hydrocephalus.
Methods:
Medical therapy:
- Analgesics.
- Muscle relaxants to relieve muscle spasm.
- Diuretics (in cases of increased intracranial pressure).
Physiotherapy: massage and therapeutic exercises to strengthen cervical muscles.
Dynamic observation: regular MRI scans and follow-up by a neurologist.
Surgical treatment
The main approach in patients with pronounced symptoms, disease progression, or complications.
Main surgical procedures:
- Posterior fossa decompression. Removal of part of the occipital bone and the posterior arch of the first cervical vertebra to enlarge the space and reduce pressure. This is often combined with duraplasty to improve CSF circulation.
- Shunting procedures. Placement of a shunt to divert excess CSF into the abdominal cavity or another body space. Used in cases of hydrocephalus or syringomyelia.
- Endoscopic surgery. Minimally invasive correction of CSF dynamics, such as endoscopic third ventriculostomy.
- Syrinx treatment. Drainage or elimination of spinal cord cysts in syringomyelia.
Postoperative period
- Medical support: analgesics, antibiotics for infection prevention, glucocorticoids to reduce brain edema.
- Rehabilitation: physiotherapy to restore motor function and therapeutic exercises to improve coordination.
- Dynamic follow-up: regular MRI examinations to assess surgical outcomes and detect possible recurrence.
Treatment of Chiari malformation requires an individualized approach based on symptom severity and the presence of complications. Modern diagnostic and surgical techniques used in Belarus allow effective management of this condition, significantly improving patients’ quality of life and preventing serious consequences.
