# Precision Nephrology: Genetics, Biomarkers, and Diagnostic Labels

Order a test when its result could change diagnosis, family counseling, donor assessment, or treatment.

![Infographic: Precision Nephrology: Genetics, Biomarkers, and Diagnostic Labels](https://urinenephrology.org/visual-reference/images/student-precision-kidney.png?v=20261003c)

## Recognize a genetic clue

Early onset, affected relatives, kidney disease with hearing/eye findings, cysts, congenital anomalies, or unexplained CKD should prompt consideration of genetic evaluation. A negative family history does not exclude a de novo or recessive disorder.

## Connect phenotype to the question

Hematuria plus hearing findings suggests a basement-membrane disorder; cystic kidneys raise a different gene set. Specify the suspected phenotype before choosing a panel, exome, or targeted test with appropriate counseling.

## A variant is not automatically causal

A pathogenic/likely pathogenic result must fit the phenotype and inheritance. A variant of uncertain significance should not alone determine irreversible treatment or label relatives affected. Arrange specialist interpretation and possible future reclassification.

## Recheck the hypertension label

Heavy proteinuria, active sediment, rapid progression, or a strong family history is not explained simply by coexisting high BP. Investigate another kidney disease before declaring “hypertensive nephropathy.”

## Evaluate a prediction tool before use

Check its intended population, calibration, external validation, and the action linked to its output. A high discrimination score in a development cohort does not show benefit or fairness in your clinic.

## Worked example

A young adult with unexplained CKD and an affected parent is considering a related living donor. Genetic evaluation may clarify both diagnosis and donor risk; discuss consent and family implications before testing.

## Source lessons

- [precision nephrology student handout](https://urinenephrology.org/student-resources/advanced/precision-nephrology-student-handout.html)
- [hypertensive nephropathy student handout](https://urinenephrology.org/student-resources/hypertension/hypertensive-nephropathy-student-handout.html)

Read alongside the full lessons; the findings and decisions shown here require the stated clinical context.