During a pregnancy amniocentesis reveals elevated levels of alpha-fetoprotein, and ultrasound Imaging indicates the presence of a cyst in the dorsal midline in the lower lumbar region. Corrective postnatal surgery reveals that the cyst contains cerebrospinal fluid but no neural tissue. What is your evaluation of the cyst (LQ)
|A||It is seen in infants with spina bifida occulta|
|B||It was a meningocele|
|C||It was an Arnold Chiari -malformation|
|D||It results from the rostral neuropore failing to close|
It was a meningocele
• Spina bifida occulta will show no cyst.
• Failure of rostral (anterior / cephalic) neuropore to close leads to Anencephaly.
• Arnold Chiari -malformation is hind brain herniation through the foramen magnum. It is commonly associated with spina bifida defects.