Dandy-Walker syndrome: analysis of 21 cases

Area of Science:

• Neuroscience
• Developmental Biology
• Pediatric Neurology

Background:

• Dandy-Walker syndrome is a congenital brain malformation characterized by cystic dilation of the fourth ventricle and hypoplasia of the cerebellar vermis.
• Associated anomalies can include hydrocephalus, agenesis of the corpus callosum, and systemic malformations.
• The condition presents a significant challenge in diagnosis, management, and long-term patient outcomes.

Purpose of the Study:

• To review the clinical course, associated anomalies, and outcomes of Dandy-Walker syndrome cases.
• To evaluate the effectiveness of surgical interventions and identify factors influencing mortality and morbidity.
• To provide recommendations for surgical management strategies.

Main Methods:

• Retrospective case series analysis of 21 patients diagnosed with Dandy-Walker syndrome between 1950 and 1978.
• Review of patient records for associated brain and systemic malformations, surgical treatments, and outcomes.
• Analysis of mortality rates, shunt revision frequency, and neurodevelopmental status of survivors.

Main Results:

• The overall mortality rate was 48%, with a decline observed after 1965.
• Surgical treatment in 12 cases resulted in a lower mortality rate (33%).
• Survivors showed a range of intellectual outcomes, with 3/11 normal, 4/11 mild intellectual disability, and 4/11 moderate to severe intellectual disability. High rates of shunt revisions were noted.

Conclusions:

• Dandy-Walker syndrome is associated with significant mortality and morbidity, necessitating careful management.
• Surgical intervention, particularly double shunting in specific cases, can improve outcomes.
• Long-term neurodevelopmental follow-up and management of complications like hydrocephalus and shunt malfunctions are crucial.