Which of the following is not true regarding ossified posterior longitudinal ligament (OPLL)?

A. Most commonly involves thoracic spine

B. Gradient echo MR sequence may overestimate the canal stenosis

C. MRI is best for diagnosis

D. Low signal intensity on all MR sequences

Correct Answer: Most commonly involves thoracic spine

Description: Ossification of the posterior longitudinal ligament most commonly involves the cervical spine and not the thoracic spine.

Category: Radiology

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