Risk of malignancy in renal biopsy: A review

Area of Science:

• Nephrology
• Cytopathology

Background:

• Malignancy risk stratification in renal biopsy specimens presents unique challenges compared to other anatomical sites.
• Accurate classification of renal cytologic categories is crucial for patient management and treatment decisions.

Purpose of the Study:

• To highlight the distinct malignancy risks associated with cytologic categories in renal biopsies.
• To identify areas for improvement in the classification of renal biopsy specimens by cytopathologists.

Main Methods:

• Review of cytologic categories in renal biopsy specimens.
• Analysis of malignancy risks associated with each category.
• Consideration of adjunctive techniques such as immunohistochemistry and core-needle biopsy.

Main Results:

• The risks of malignancy for cytologic categories in renal biopsies are site-specific and differ from those at other locations.
• Specific areas within cytopathology require refinement for improved classification accuracy of renal specimens.

Conclusions:

• Cytopathologists can enhance the classification of renal biopsy specimens.
• Routine integration of immunohistochemistry and core-needle biopsy is recommended to improve diagnostic accuracy and refine malignancy risk assessment in renal cytology.