OPLL (Ossification of the posterior longitudinal ligament)

Clinical History: 
A 57 year old male with numbness of the hands.

Diagnosis:
OPLL (Ossification of the posterior longitudinal ligament)

MR Technique: 
3.0 Tesla scanner (Siemens Verio) using an 18-channel head coil. Image 1: Sagittal T2_TSE (TR/TE 3000/107 ms, scan time 1 min 21 sec * 2, slice thickness 3 mm); Image 2: Sagittal T1_TRIM_dark-fluid_320 (TR/TE 2000/10 ms, scan time 1 min 58 sec * 2, slice thickness 3 mm).

Imaging Findings:
Severe spinal canal stenosis at the C3-C4 and C4-C5 levels is present, primarily due to ossification of the posterior longitudinal ligament. Minimal abnormal signal within the spinal cord at these levels is likely due to myelomalacia.