From: IL6 secreted by Ewing sarcoma tumor microenvironment confers anti-apoptotic and cell-disseminating paracrine responses in Ewing sarcoma cells
IL6 ≥ 20 pg/ml
IL6 < 20 pg/ml
Patients
4
8
Fever at diagnosis
2
Metastasis at diagnosis
3
Death, due to disease progression
IL6-positive tumor (RT-PCR or IHC)
2/3
1/5