Renal tumor biopsy: indicators, technique, safety, accuracy results, and impact on treatment decision management.

CONTEXT: Renal tumor biopsy (RTB), as distinct from the more common renal biopsy for medical renal disease, is an option for patients with renal masses. It is mainly used for small renal masses (SRM) but it may also be indicated for larger masses and even in the presence of metastatic disease. Its main indication in SRM is to avoid intervention for benign kidney tumors but increasingly enables more personalized treatment for kidney cancer patients.

OBJECTIVE: The objective of this paper is to provide a comprehensive review of the most recent literature available for RTB including the indications, the technique and also the possible complications.

RESULTS: The urological community continues to optimize the indications for RTB. Non-operative treatment modalities, such as active surveillance, ablative modalities, and immunotherapy, may have different results influenced by tumor histology. Continuing concern regarding complications and accuracy and, therefore, the utility of RTB has been addressed. Recent reports support the potential benefit of RTB, safely avoiding a significant number of interventions with good results and minimal complications.

CONCLUSION: Urologists should be aware of the benefits of RTB and develop experience with this technique to optimize the results. This diagnostic strategy should be discussed with patients and adopted as it has been with other solid tumors.