Table 2.
Overview of the number of patients, treatment and outcome in the largest case-series reviewed
| Author | N | Treatment | Outcome | Comments | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| C | LS | S | S + F | S + LF | E | G | F/P | |||
| Freidberg et al. [13] | 26 | 0 | 0 | 26 | 0 | 2 | 17 | 7 | 1 | |
| Howington et al. [16] | 28 | 0 | 0 | 27 | 1 | 0 | 20 | 3 | 5* | 3/5 had prior spinal surgery |
| Hsu et al. [17] | 19 | 11* | – | 8 | 0 | 0 | 3 | 4 | 1 | No sustained benefit; no report on subsequent surgery |
| Jonsson et al. [19] | 8 | 1 | 1 | 7 | 0 | 0 | 5 | 3 | 0 | |
| Lyons et al. [27] | 194 | 0 | 0 | 176 | 18 | 4 | 134* | 13 | 47 patients were lost at follow-up | |
| Metellus et al. [31] | 77 | 27 | 27 | 77 | 0 | 1 | 63 | 12 | 2 | |
| Sabo et al. [39] | 56 | 12 | 8 | 48* | 6 | 2 | 40 | 12 | 2 | Three patients developed a contralateral symptomatic cyst |
| Shah et al. [42] | 10 | 10 | 8 | 7 | 1 | 0 | 8 | 0 | ||
| Trummer et al. [45] | 19 | 0 | 0 | 19* | 0 | 0 | 17 | 2 | 0 | One patient had recurrence and was reoperated |
| Yarde et al. [47] | 0 | 0 | 6 | 2 | 0 | 5 (6)* | 2 | 1 (0) | One patient was reoperated with complete resolution of symptoms | |
N number of patients, C conservative treatment, LS late surgery (surgery after conservative treatment failure), S surgery, S + F surgery with fusion, S + LF surgery and late fusion (need for fusion at later time), E excellent, G good, F/P fair/poor, (*) refers to the comment