Anterior only |
47 |
(38) |
Posterior only |
44 |
(35) |
Combined anterior-posterior simultaneous |
8 |
(6) |
Anterior or posterior portion of staged procedure |
26 |
(21) |
Instrumentation of all procedures |
Incidence of any instrumentation |
115 |
(92) |
Incidence of PMMA (Polymethylmethacrylate) usage |
75 |
(60) |
Blood loss for all procedures |
Median estimated blood loss (ml), (range) |
700 |
(50–6,000) |
Median number of blood transfusions, (range) |
1 |
(0–16) |
Number of vertebral bodies removed per patient |
0 |
19 |
(22) |
1 |
43 |
(49) |
2 or more |
25 |
(29) |
Number of levels instrumented per patient |
0 |
4 |
(5) |
3–5 |
53 |
(61) |
6–10 |
23 |
(26) |
11–15 |
7 |
(8) |
Indications for subsequent surgery by patient |
Second part of staged surgery |
13 |
(15) |
Tumor recurrence (local or distant) |
20 |
(23) |
Surgical revision of instrumentation |
12 |
(14) |