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Prenatal diagnosis of herniated Dandy-Walker cysts
Wesley Lee1, Ivana M Vettraino, Christine H Comstock
1Division of Fetal Imaging, Department of Obstetrics and Gynecology, William Beaumont Hospital, Royal Oak, MI 48073-6769, USA. wlee@beaumont.edu
Summary
Prenatal diagnosis of Dandy-Walker malformation with herniated cyst is possible using advanced imaging. Three-dimensional sonography and fetal MRI help identify herniation sites and associated neuronal migration disorders.
Area of Science:
- Medical imaging
- Prenatal diagnosis
- Neurology
Background:
- Dandy-Walker malformation involves cerebellar and brainstem abnormalities.
- Herniation of a posterior cyst through cranial defects presents diagnostic challenges.
Observation:
- Two fetuses with Dandy-Walker malformation and herniated cysts were evaluated.
- Two- and 3-dimensional sonography and fetal MRI were utilized for diagnosis.
Findings:
- 3D sonography precisely identified cyst herniation sites.
- Fetal MRI confirmed sonographic findings and revealed neuronal migration disorders.
- Neonatal MRI showed heterotopic gray matter and agenesis of the corpus callosum in one fetus.
Implications:
- Antenatal detection of cystic neck masses and cerebellar vermis abnormalities suggests Dandy-Walker malformation with herniation.
- 3D sonography and fetal MRI are crucial for evaluating herniation and neuronal migration disorders.