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| | Ewing's Family of Tumors Treatment - National Cancer Institute |
 | | Metastases: Although the prognosis is thought to be poor, it has been observed that with intensive therapy, survival in patients with ETB who have only pulmonary metastases is higher than for patients with bone or bone marrow metastases.[9,22] |
 | | Routine histopathology: Traditionally, a major distinction has been made between classical Ewingâs sarcoma, which shows minimal evidence of differentiation, and PNET, which shows evidence of neural differentiation; however, the degree of neural differentiation does not influence outcome.[23,24] |
 | | Response to preoperative therapy: Multiple studies have shown that patients with minimal or no residual tumor after presurgical chemotherapy have a significantly better event-free survival compared with patients with larger amounts of viable tumor.[9,12,14,30,31] Massive tumor necrosis after induction chemotherapy is a very favorable sign.[9,10,30,32] |
| cancer.gov /cancertopics/pdq/treatment/ewings/healthprofessional (1697 words) |
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