Background
Methods
Results
Baseline characteristics
Age, mean (range) | 56 (11–84) |
---|---|
Male | 72 (51.8%) |
Tumor size, median (range) (cm) | 2.5 (1–10) |
Preoperative symptoms | |
Numbness | 10 (7.1%) |
Tenderness | 101 (71.6%) |
Radiating pain | 115 (81.6%) |
Hypesthesia | 11 (7.8%) |
Motor weakness | 6 (4.2%) |
Duration of symptoms, | 12 (1–300) |
median (range) (months) | |
Schwannomatosis | 12 (8.6%) |
Previous surgery | 3 (2.1%) |
Degenerative changes on MR imaging | 49 (34.8%) |
Tourniquet | 75 (53.2%) |
Number | Locations | Number | Nerves involved | Number | |
---|---|---|---|---|---|
Upper limb | 29/60 | Upper arm | 15/26 | Brachial plexus | 3/5 |
Elbow | 5/9 | Median | 13/21 | ||
Forearm | 3/9 | Ulnar | 5/16 | ||
Hand and wrist | 6/16 | Radial | 5/9 | ||
Musculocutaneous | 1/2 | ||||
Posterior interosseous | 1/1 | ||||
Digital | 1/6 | ||||
Lower limb | 20/81 | Buttock and groin | 0/2 | Obturator | 0/2 |
Thigh | 3/19 | Sciatic | 2/7 | ||
Knee | 6/17 | Femoral | 1/3 | ||
Lower leg | 8/25 | Saphenous | 1/7 | ||
Foot and ankle | 3/18 | Tibial | 8/24 | ||
Common peroneal | 4/11 | ||||
Deep peroneal | 1/2 | ||||
Superficial peroneal | 0/8 | ||||
Sural | 2/6 | ||||
Plantar | 1/11 |
Predictive factors for postoperative complications
Postoperative complications | P value | ||||
---|---|---|---|---|---|
(−) | (+) | univariate | multivariate | ||
Mean age | 52.2 | 59.3 | 0.03 | 0.06 | |
Tumor size | 3.19 | 2.94 | 0.45 | ||
Duration of | ≥12 months | 51 | 21 | 0.15 | 0.25 |
symptoms | < 12 months | 41 | 28 | ||
Preoperative motor | (−) | 89 | 46 | 0.41 | |
weakness | (+) | 3 | 3 | ||
Preoperative hypesthesia | (−) | 85 | 44 | 0.67 | |
(+) | 6 | 5 | |||
Schwannomatosis | (−) | 84 | 45 | 1.0 | |
(+) | 8 | 4 | |||
Previous surgery | (−) | 90 | 48 | 1.0 | |
(+) | 2 | 1 | |||
Degenerative changes | (−) | 59 | 31 | 0.9 | |
on MR imaging | (+) | 32 | 17 | ||
Tourniquet | (−) | 42 | 24 | 0.25 | |
(+) | 50 | 25 | |||
Location | Upper limb | 31 | 29 | 0.003 | 0.14 |
Lower limb | 61 | 20 | |||
Proximal | 46 | 27 | 0.59 | ||
Distal | 46 | 22 | |||
Nerve | Major motor | 59 | 44 | 0.001 | 0.03 |
Others | 33 | 5 |
Clinical course of the postoperative complications
MRC grading | Postoperative observation | ||||
---|---|---|---|---|---|
Case | Nerves involved | Preoperative | Postoperative | Final follow-up | period (months) |
1 | Median | 5 | 4 | 5 | 48 |
2 | Ulnar | 5 | 3 | 4 | 41 |
3 | Median | 5 | 2 | 3 | 2 |
4 | Radial | 5 | 2 | 4 | 1 |
5 | Posterior interosseous | 4 | 2 | 4 | 96 |
6 | Common peroneal | 5 | 2 | 3 | 21 |
7 | Common peroneal | 4 | 0–1 | 2 | 16 |
8 | Tibial | 5 | 0–1 | 2 | 6 |