Table 4.
Characteristics of systemic involvement in OS.
| No. of pts | % | |
|---|---|---|
| Previously diagnosed S | 35 | 14.9 |
| Systemic diagnosis at onset of OS | 120 | 51 |
| Late Diagnosis | 52 | 22.1 |
| No Systemic involvement | 28 | 11.9 |
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