Thoracic Anomalies

Question 1

In block vertebrae, if less than 80% of the discovertebral junction between two levels is fused, the term ____ is used.

Answer 1

Unsegmented bar

Question 2

A sagittal cleft in a vertebral body. Most common in the thoracolumbar junction

Answer 2

Butterfly vertebra

Question 3

Failure of ossification of half of a vertebra

Answer 3

Hemivertebra

Question 4

The endplates of the adjacent vertebra are altered to conform to the hemivertebra

Answer 4

Incarcerated hemivertebra

Question 5

The adjacent endplates to a hemivertebra are straight, more than likely resulting in a scoliotic deformity

Answer 5

Non-incarcerated hemivertebra

Question 6

The hemivertebra is fused to an adjacent segment with no separating intervertebral disc

Answer 6

Non-segmented hemivertebra

Question 7

Herniation of disc material into the vertebral body. Most likely occurs during adolescence to immature endplates

Answer 7

Schmorl’s nodes

Question 8

Multiple levels of Schmorl’s nodes in the mid-thoracic spine. Usually causes hyperkyphosis due to anterior vertebral body wedging

Answer 8

Scheuermann’s disease

Question 9

Multiple levels of Schmorl’s nodes in the lumbar spine is known as:

Answer 9

Juvenile discogenic disease