Osteosarcoma of the Pelvis: Clinical Presentation and Overall Survival
Table 1
Demographics and tumor characteristics for patients with primary osteosarcoma of the pelvis within the SEER database, 2004–2015, with 2-, 5-, and 10-year survival.
Variable
n
%
Survival
2-year
5-year
10-year
All patients
292
100
45.6
26.5
21.4
Sex
Male
149
51.0
43.3
26.8
21.8
0.481
Female
143
49.0
48.0
26.1
20.9
Age group
Age <25
96
32.9
54.0
34.3
25.0
<0.001
Age 25–60
104
35.6
44.9
25.0
23.1
Age >60
92
31.5
28.2
12.8
12.8
Histology
Osteoblastic
204
69.9
41.6
23.5
20.0
0.074
Chondroblastic
65
22.3
55.5
29.3
26.0
Paget-associated
6
2.1
25.0
0
0
Other
17
5.8
53.8
46.2
28.8
Tumor size
Tumor ≤8 cm
56
28.0
58.3
33.7
30.3
0.033
Tumor >8 cm
144
72.0
42.1
27.0
18.1
Tumor extension
Contained to the originating bone
63
24.8
52.3
31.7
28.5
0.550
Extension beyond the periosteum
177
69.7
42.9
25.2
18.6
Infiltrating the adjacent bone or cartilage
55
21.7
39.5
23.7
14.2
Skip metastasis
10
3.4
50.0
50.0
50.0
Metastasis
None at presentation
183
66.5
59.7
36.5
28.6
<0.001
Metastasis at any location
92
33.5
12.7
5.3
0
Metastasis to lung only
41
14.9
20.5
5.1
0
Metastasis to lung and other nonlymph node site
36
13.1
7.4
7.4
0
Surgery
None
152
52.6
23.4
11.0
11.0
<0.001
Any surgery
137
47.4
65.1
39.6
30.4
Internal hemipelvectomy/excision
94
32.5
68.7
48.4
37.5
External hemipelvectomy
7
2.4
57.1
14.3
0
Unspecified surgical procedure
36
12.5
59.4
28.1
20.1
Radiation
Received radiation and surgery
19
30.2
60.0
37.5
37.5
Received radiation without surgery
44
69.8
16.7
0.0
0.0
values are for Kaplan–Meier log-rank tests for pooled variables in each subcategory.
