| Case serial |
Gender |
Age |
Clinical Diagnosis for SCS therapy |
Detail of Procedure (type, entrance level, number of leads and level of leads) |
Clinical course of TNP (onset, clinical presentation, duration of symptoms) |
| 1 |
Female |
69 |
History of L5 and S1 laminectomy and fusion. Lower back pain and right L5 and S1 radiculopathy secondary to spinal and foraminal stenosis. She received a successful SCS trial. |
Permanent implantation, bilateral L1-2, two leads, at T9. |
Immediately after procedure developed pain at the right great toe, with positive allodynia. No sensory and motor deficits. Negative lab tests for infection and gout. She refused steroid therapy. Her symptoms resolved after removal of the SCS. |
| 2 |
Female |
62 |
Thoracic back pain and radiculopathy, status post T6-T8 corpectomy and fusion of T5 to T11 with posterior pedicle screws for a T7 compression fracture. History of thoraco-lumbar scoliosis. |
The initial trial entrance was left of T11-12; however, the procedure was complicated by an epidural leak, which was treated with a blood patch intraoperatively. The entrant levels were then changed to the left of T12-L1, where the lead tip reached T5. The patient also received peripheral nerve stimulation on the right paraspinal regions of T8 to T11. |
Immediately after the procedure, the patient experienced pain at the medial left foot. Findings included allodynia but no motor or sensory findings. Her symptoms resolved completely in 5 days after oral steroid therapy. She received a successful trial and underwent percutaneous placement of a permanent SCS with two leads. |
| 3 |
Male |
48 |
Failed back syndrome, previous unsuccessful SCS therapy (the leads had been removed). Lumbar radiculopathy. |
Permanent implantation. The entrances of both leads were at T12-L1 bilaterally. The procedure was successful and the lead tips were at T7. |
The patient experienced pain and allodynia at both dorsal feet immediately after the procedure. No new neurological deficit. These symptoms resolved within 1 week after the oral steroid therapy. He has had successful pain relief after the SCS implantation. |
| 4 |
Male |
57 |
Failed back syndrome, lumbar radiculopathy, T11 T2 mild compression fractures, and spinal stenosis. |
Trial, Narrowing at the interlaminal space of T12-L1, L1-2, L2-3. The needle entrances were attempted at different levels; however, the SCS leads could not be secured in an appropriate position. The leads were removed in the OR. |
Immediately following the procedure, the patient experienced dorsal foot pain without neurological deficit. His symptoms completely resolved in 1 week after oral steroid therapy. |
| 5 |
Male |
33 |
Status post discectomy and intervertebral fusion at the L4-5 level. Chronic low back pain and lumbar radiculopathy. |
Trial Needle entrance at the T11-12 interlaminal space. The SCS lead tips were at T7. |
The patient experienced pain at the left, medial aspect of his knee. This symptom completely resolved in two days after taking oral steroids. He completed 7 days of the SCS trial. |
| 6 |
Male |
33 |
The same patient from case 5. |
Permanent implantation. The SCS needle entrance was at the L1-2 interlaminal space bilaterally. The SCS lead tips were at T7. |
Immediately after surgery he complained of pain at bilateral anterior tibia. There was no new neurologic deficit. His symptoms completely resolved within 1 week after oral steroid therapy. His SCS therapy was otherwise successful. |
