43-year-old male suffered of cervical disc herniation, and therefore C5-6 and C6-7 discectomy and fusion were done. About one year later he experienced acute sciatica followed by hot pricking sensation in the arm and neck. MRI showed far lateral bulge of L3-4 on the left and small disc bulge on C4-5, and a larger C5-6 disc herniation. Neurological examination disclosed C6-C7 radiculopathy on the left, minimal weakness of biceps and triceps muscles and reduced biceps reflex. EMG and physical examination were consistent with bilateral radiculopathy, attributed to small disc herniation.

45-year-old male who presented with acute onset of flaccid paraparesis more pronounced on the left, sensation of current shocks in both legs and sensory level from the umbilicus downwards. The symptoms have reached their pick within less than a day. On examination the left lower limb was plegic and the right lower limb was partially weak. EMG was interpreted as demyelinating sensorimotor neuropathy. MRI showed hyperintense signals at the dorsal terminal segment of the marrow consistent with myelitis.