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What is Polycystic Kidney Diesease?
PKD is an inherited condition causing fluid-filled cysts to develop in the kidneys. There are two main forms: autosomal dominant (ADPKD), which is generally late-onset, and autosomal recessive (ARPKD), which typically presents in infancy or childhood. Beyond the kidneys, PKD can affect multiple organ systems. Hypertension is the most frequent initial presentation, occurring in 50–70% of cases (NCBI), often years before the kidneys show any signs of damage.
Signs and symptoms of PKD include:
- Bilateral kidney cysts visible on imaging
- High blood pressure
- Back or side pain
- Blood in urine
- Swollen abdomen
- Liver cysts (in ADPKD)
- Enlarged kidneys (particularly in ARPKD)
Like many hereditary conditions, PKD can be present for years before symptoms become apparent. Early genetic testing can identify a causative variant before significant kidney damage has occurred, enabling closer monitoring, earlier intervention, and more informed family planning decisions. If you are experiencing any symptoms that are worrying you, it is important that you report this to your GP.
More information about PKD can be found on NHS1, NHS2.
What are the causes?
PKD is caused by inherited variants in specific genes. ADPKD is primarily caused by variants in PKD1 or PKD2. ARPKD is caused by variants in PKHD1 and other genes including DZIP1L. Additional genes such as DNAJB11 and GANAB are associated with atypical presentations. Because these variants are inherited, a family history of PKD is a key risk factor.
In 10–15% of ADPKD cases, there is no known family history - the mutation has occurred spontaneously for the first time in that person. This means PKD can appear even without any relatives being affected, making genetic testing valuable even when family history seems clear.
Is genetic testing for PKD right for me?
This panel is recommended for anyone with a personal history of polycystic kidney disease - particularly if renal imaging has shown bilateral cysts, if there is an existing clinical diagnosis, or if symptoms such as hypertension, kidney dysfunction, or enlarged kidneys are present. Identifying a specific gene variant can confirm a diagnosis, clarify inheritance patterns, and inform treatment and family planning decisions. Finding a genetic diagnosis can also enable other at-risk family members to access genetic testing and screening, where relevant. With ≥99% coverage at 20x depth across all 6 genes, this panel provides a highly accurate diagnostic solution.
If you have a family history of PKD and aren't sure if this test is right for you, we would recommend booking a genetic counselling appointment to discuss your family history and testing options. We would always recommend testing a symptomatic family member first, for the most informative genetic test. If you carry a PKD gene change, there's a 50% chance (NCBI) it could be passed on to your child - therefore, understanding your genetics before starting a family can help you make confident decisions.
Disclaimer! The information provided in this article is for educational purposes only. It is not a substitute for professional medical advice. Always consult your doctor or a qualified healthcare provider for advice on medical conditions or treatments. Sources used: NCBI, UK Kindney Association, NHS.













