Thoracic myelopathy due to developmental canal stenosis has not been reported so far. This is to report one case of this disorder.
A sailor, 39 years old male, had numbness and weakness of legs 4 months before admission, and gait disturbance was followed. Neurologically tendon reflex of lower limbs were hyperactive and sensory disturbance was observed at the feet. Spinal fluid examination showed 106mg/dl of protein and 103/3 of cell cont. Segmental SEP at cervical and lumbar enlargement levels of the spinal cord was normal, but conductive disturbance was observed between C6 and T11 spinal levels. Plain radiogram showed developmental canal stenosis with mild spondylotic changes at T9-10. A-p diameter of thoracic spine was small in x-ray film by the measurement of our method and C-T scanning revealed by small compared with the normal cases. Cervical and lumber spine also had the small canal. Laminectomy at T8 through T11 brought excellent result.
