case_images: PMC10793718_01
case_images: PMC10793718_02
case_images: Section on trucut biopsy reveals tissue cores comprising of a malignant round blue cells neoplasm. The tumor comprises sheets of small to medium-sized cells with hyperchromatic nuclei, inconspicuous nuclei, and moderate to scant cytoplasm
case_images: JCAS-10-563-g001.jpg
case_images: PMC10793718_02_JCAS-10-563-g001.jpg
case_images: F1
case_images: The boy underwent an image-guided biopsy, which revealed a malignant round blue cell tumor [Figure 1] (CD-99 and FLI-1 positive) and labeled Ewing sarcoma.
case_images: PMC10793718_03
case_images: PMC10793718_04
case_images: Sections from the radical nephrectomy specimen show sheets of malignant round blue cells with hyperchromatic nuclei, inconspicuous nuclei, and moderate to scant cytoplasm. Background shows extensive necrosis and hemorrhage
case_images: JCAS-10-563-g002.jpg
case_images: PMC10793718_04_JCAS-10-563-g002.jpg
case_images: F2
case_images: Histopathology showed 85% necrosis [Figure 2], with a viable tumor in the renal sinus and negative margins.