Lateral meningocele syndrome is a rare congenital pathology characterized by hernial protrusion of the dura mater through a defect in the lateral wall of the skull. This condition may be accompanied by compression of the cranial nerves, impaired cerebrospinal fluid circulation, and the development of neurological symptoms of varying severity. Depending on the localization, temporal, ethmoidal, and sphenoidal variants of the disease are distinguished, with the temporal form being the most common.
History of the disease and interesting historical facts
The first description of a case of lateral meningocele was presented in the medical literature in the early 19th century by the French surgeon Jean Louis Petit. However, detailed study of the pathology began only in the mid-20th century with the development of neuroimaging diagnostic methods. “The evolution of understanding of this pathology demonstrates significant progress from the initial description of the clinical picture to modern molecular genetic studies,” notes neurosurgery professor Richard Hansen in his 2015 monograph.
Epidemiology (statistics of disease occurrence)
According to the International Registry of Rare Diseases, the incidence of lateral meningocele syndrome is approximately 1 case per 100,000 live births. Statistical analysis shows the following distribution patterns:
- Sex ratio: 1.3:1 in favor of women
- Most often diagnosed in the age group of 15-45 years
- Approximately 65% cases are diagnosed in early childhood.
Genetic predisposition to the disease (involved genes and mutations)
Research in recent years has revealed a link between the disease and mutations in genes responsible for the formation of connective tissue. Particular attention is paid to the following genetic markers:
- COL1A1 - encodes collagen type I
- TGFBR2 - transforming growth factor receptor beta
- FBN1 - fibrillin-1
“Molecular genetic analysis can identify pathogenic variants in 40% patients with familial cases of the disease,” say the authors of a study published in the Journal of Neurosurgery in 2020.
Risk factors for the development of this disease
The main risk factors for the development of pathology include:
- Adverse environmental conditions during pregnancy
- Taking certain medications in the first trimester
- Chronic infectious diseases of the mother
- Hereditary predisposition
A special study conducted in 2018 showed that exposure to ionizing radiation increases the risk of developing the disease by 2.7 times.
Diagnosis of this disease
The clinical picture includes a complex of characteristic symptoms:
- Localized swelling in the temple area
- Tension headaches
- Neurological disorders
Main diagnostic methods:
- MRI of the brain with contrast
- Skull CT
- Cytological examination of cerebrospinal fluid
Differential diagnosis includes epidermoid cysts, neuromas and metastatic lesions.
Treatment
The therapeutic approach includes:
- Conservative treatment for symptom correction
- Surgical intervention for removal of meningocele
- Neurorehabilitation after surgery
Surgical treatment is indicated in case of progression of neurological symptoms or risk of infection.
List of drugs used to treat this disease
Main groups of drugs:
- Nonsteroidal anti-inflammatory drugs (Diclofenac, Nimesulide)
- Anticonvulsants (Carbamazepine, Lamotrigine)
- Dehydrating agents (Mannitol)
- Broad-spectrum antibiotics
Disease monitoring
The patient monitoring plan includes regular follow-up examinations every 6 months with MRI control. The prognosis is favorable in most cases with timely surgical treatment. Possible complications:
- Relapse of the disease
- Hearing loss
- Liquorrhea
Age-related features of the disease
In children, the disease often occurs with more pronounced neurological symptoms due to the smaller size of the cranium. In adult patients, the following are more often observed:
- Headaches
- Vestibular disorders
- Hearing loss
In elderly patients, the risk of complications is significantly higher, which requires a special approach to treatment.
Questions and Answers
- What are the first signs that should alert you? Initial symptoms may include recurrent headaches and swelling in the temple area.
- Is surgical treatment necessary? Surgery is indicated when neurological symptoms progress or there is a high risk of complications.
- What is the chance of recurrence after surgery? If the operation is performed correctly, the risk of recurrence does not exceed 5%.
Advice from Dr. Oleg Korzhikov
"Patients often ask about the possibility of conservative treatment - it is important to remember that drug therapy can only temporarily control symptoms, but does not eliminate the underlying problem. Many are also concerned about the safety of the operation - modern microsurgical techniques allow us to minimize risks. Regarding the prognosis - with timely treatment, most patients return to normal life."
