Blake's pouch cyst: Prenatal diagnosis and management

Area of Science:

• Neuroimaging
• Prenatal Diagnosis
• Pediatric Neurology

Background:

• Blake's pouch cyst (BPC) is a rare posterior fossa malformation.
• Accurate prenatal diagnosis and understanding of associated anomalies are crucial for patient management.

Purpose of the Study:

• To characterize the clinical and imaging features of 19 patients diagnosed with Blake's pouch cyst (BPC).
• To evaluate the diagnostic accuracy of prenatal imaging modalities and assess outcomes.

Main Methods:

• Retrospective review of 19 BPC cases diagnosed between 2015-2019.
• Utilized ultrasonography (US) and magnetic resonance imaging (MRI) for prenatal and postnatal assessment.
• Karyotype analysis was performed in a subset of patients.

Main Results:

• 53% of patients had associated anomalies, including central nervous system (36%) and cardiac (21%) issues.
• Prenatal MRI diagnostic accuracy for BPC was limited, with 74% requiring further differential diagnosis.
• Spontaneous resolution occurred in 4 patients; 21% showed abnormal neurologic development, and 5% died.

Conclusions:

• Isolated BPC generally has a favorable prognosis with normal neurological development.
• Associated anomalies significantly impact outcomes, potentially leading to neonatal death and developmental abnormalities.