Presence of tumor cells in bone marrow but not in blood is associated with adverse prognosis in patients with Ewing's tumor. Société Française d'Oncologie Pédiatrique.

Abstract

These results suggested that the monitoring of BM but not of PB by RT-PCR might constitute an important criterion for the staging, at diagnosis, of patients with ET. Further studies should appreciate the relationship or independence of this marker toward other classical prognostic factors in ET, particularly to the presence of clinically detectable metastases.