Case Report: KIF5B-ALK–rearranged renal cell carcinoma - Summary - MDSpire

Case Report: KIF5B-ALK–rearranged renal cell carcinoma

  • By

  • Jiaxi Yao

  • Zhifei Xie

  • Guangyao Shi

  • Ming Tan

  • Zhuo Liu

  • Min Lu

  • Hongxian Zhang

  • June 15, 2026

  • 0 min

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Objective:

To present a case of renal cell carcinoma with KIF5B-ALK fusion and enhance understanding of this rare subtype's clinical significance.

Key Findings:
  • The patient had a renal tumor measuring 2.8 × 2.7 × 2.6 cm with atypical morphology.
  • Immunohistochemistry demonstrated renal epithelial differentiation and excluded other entities.
  • KIF5B-ALK gene fusion was confirmed through next-generation sequencing, indicating a specific oncogenic mechanism.
Interpretation:

The findings contribute to the clinical and pathological understanding of ALK-RCC, highlighting its rarity and the challenges in management due to limited treatment options, suggesting a need for targeted therapies.

Limitations:
  • The study is based on a single case report, limiting generalizability.
  • Limited data on the clinical outcomes and treatment responses for ALK-RCC, with potential biases in case selection.
Conclusion:

This case illustrates the characteristics of a rare subtype of ALK-RCC with KIF5B-ALK fusion, emphasizing the need for further research into its management and potential therapeutic strategies.

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