Pathobiologic Markers of the Ewing Sarcoma Family of Tumors: State of the Art and Prediction of Behaviour

<table>Peripheral primitive neuroectodermal tumor with Homer Wright rosettes.  The rosettes contain a circular wreath of oval nuclei that surround a pale eosinophilic, fibrillary core.</table>

Sarcoma

fig2

Figure 2

Figure 2: Pathobiologic Markers of the Ewing Sarcoma Family of Tumors: State of the Art and Prediction of Behaviour 