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Cancer Staging Systems

Staging of Ewing's tumor

Localized

For Ewing?s tumor of bone, the tumor is defined as localized when, by clinical and imaging techniques, it has not spread beyond the primary site or regional lymph nodes. There may be contiguous extension into adjacent soft tissue. Extraosseous Ewing?s has been grouped using the rhabdomyosarcoma staging system shown below:

• Group I: Completely excised.
• Group II: Microscopic residual.
• Group III: Gross residual.

Metastatic

These tumors have spread to distant sites, most commonly lung, bone, and/or bone marrow. Lymph node and, in particular, central nervous system metastases are less common. By other staging systems in common use, this is stage 4 or group IV.

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