Developemental Spinal Lesions

Question 1

What is the most common cause of tethered cord?

Answer 1

spinal lipoma

Question 2

What percent of spinal lipomas are lipomyelomeningoceles?

Answer 2

85%

Question 3

Intradural lipoma is most commonly found in the _____.

Answer 3

cervical and thoracic spine

Question 4

What filum thickness suggests possible tethered cord?

Answer 4

Filum > 1.5 mm in diameter

Question 5

What constitutes caudal regression syndrome?

Answer 5

consists of lumbosacral agensis, imperforate anus, genital malformations, renal dysplasia, and fused legs (sirenomelia)

Question 6

Anterior sacral meningocele is associated with what syndromes?

Answer 6

NF1 and marfan’s syndrome

Question 7

What is the most common presacral mass in children?

Answer 7

sacrococcygeal teratoma

Question 8

What is split notochord syndrome?

Answer 8

persistent connection exists between the gut and the dorsal ectoderm; may be caused by an adhesion between the endoderm and ectoderm

Question 9

What is diastematomyelia?

Answer 9

split cord with fibrous, bony (50%), or cartilaginous septum

Question 10

What percent of patients with diastematomyelia have a single dural tube?

Answer 10

50%

Question 11

What causes enterogenous cysts?

Answer 11

failure of the notochord and foregut to separate

Question 12

What is the most common location for enterogenous cysts? Where within the spinal canal are they located?

Answer 12

Thoracic followed by cervical

intradural, extramedullary