Table 1

Comparison of the clinical characteristics of studied 36 cases with HLA class I expression
HLA class I expression P Sig
Negative Low High
N % N % N %
Age group ≤14 years 3 33.3% 6 66.7% 9 50.0% .473* NS
>14 years 6 66.7% 3 33.3% 9 50.0%
Sex Male 6 66.7% 3 33.3% 18 100.0% .0001* HS
Female 3 33.3% 6 66.7% 0 .0%
Tumor stage at diagnosis Localized 3 33.3% 6 66.7% 18 100.0% .0001* HS
Metastatic 6 66.7% 3 33.3% 0 .0%
Tumor site Lower femur 3 33.3% 6 66.7% 12 66.7% .250* NS
Middle femur 3 33.3% 0 .0% 3 16.7%
Upper tibia 3 33.3% 3 33.3% 3 16.7%
Tumor necrosis Poor response 8 88.9% 6 66.7% 10 55.6% .258* NS
Good response 1 11.1% 3 33.3% 8 44.4%
Histopathological variant Chondroblastic 3 33.3% 6 66.7% 3 16.7% .0001* HS
Fibroblastic 0 .0% 0 .0% 9 50.0%
Osteoblastic 6 66.7% 0 .0% 6 33.3%
Small cell 0 .0% 3 33.3% 0 .0%
Serum alkaline phosphatase Mean ± SD 592.1 372.6 482.5 298.9 324.0 228.8 .078** NS

*Fisher exact.

**ANOVA.

Nada et al.

Nada et al. Diagnostic Pathology 2014 9:72   doi:10.1186/1746-1596-9-72

Open Data