Primary Ewing sarcoma of the kidney: a case report and treatment review.

Ewing sarcomas/primitive neuroectodermal tumors (ES/PNET) of the kidney are rarely found high-grade malignant tumors, offering poor prognosis. Although established treatment guidelines for ES of kidney are scarce, a multi-modality treatment approached is typically implemented. Herein, we report a 14-year-old female patient with ES of right kidney. Post-nephrectomy disease recurrence was treated with chemotherapy (i.e., vincristine, doxorubicin and cyclophosphamide); marked reduction in tumor size (i.e., from 18.5 × 11.3 cm2 to 3.7 × 2.2 cm2; ~96% reduction in size) as per computed tomography images was observed. We present our treatment experience and review from the available literature.