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<p>Ewing sarcoma/primitive neuroectodermal tumor (ES/PNET) of the kidney is a rare malignant tumor with small round blue cells. Currently, fewer cases of renal ES/PNET have been reported. Here, we report a case of renal ES/PNET in an adult male and discuss its clinical presentation, imaging differential diagnosis, and clinical treatment. A 48-year-old Asian adult male presented with a right retroperitoneal space found on physical examination 3&#xa0;days ago. He underwent CT and MRI enhancement examinations. Preoperative radiological examination suggested the possibility of a right adrenal pheochromocytoma. Postoperative pathological analysis was consistent with renal ES/PNET. The patient was discharged from the hospital for follow-up treatment at the local cancer hospital. We report a rare case of renal ES/PNET, and the diagnosis depends on pathology. This report contributes to the understanding of renal ES/PNET’s imaging characteristics. Radiologists and clinicians should consider the patient’s situation when diagnosing retroperitoneal tumors, pay attention to differential diagnosis, and also consider the possibility of the development of renal ES/PNET.</p>

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Renal Ewing Sarcoma/Primitive Neuroectodermal Tumor: A Case Report

  • 期刊论文

  • 发表日期：

    2025年6月23日

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  • Hongmei Zhang,
  • Yu Yuan,
  • Jinling Zhang

摘要

Ewing sarcoma/primitive neuroectodermal tumor (ES/PNET) of the kidney is a rare malignant tumor with small round blue cells. Currently, fewer cases of renal ES/PNET have been reported. Here, we report a case of renal ES/PNET in an adult male and discuss its clinical presentation, imaging differential diagnosis, and clinical treatment. A 48-year-old Asian adult male presented with a right retroperitoneal space found on physical examination 3 days ago. He underwent CT and MRI enhancement examinations. Preoperative radiological examination suggested the possibility of a right adrenal pheochromocytoma. Postoperative pathological analysis was consistent with renal ES/PNET. The patient was discharged from the hospital for follow-up treatment at the local cancer hospital. We report a rare case of renal ES/PNET, and the diagnosis depends on pathology. This report contributes to the understanding of renal ES/PNET’s imaging characteristics. Radiologists and clinicians should consider the patient’s situation when diagnosing retroperitoneal tumors, pay attention to differential diagnosis, and also consider the possibility of the development of renal ES/PNET.