Acquired Cystic Kidney Disease
Acquired cystic kidney disease develops in the native kidneys of patients with chronic kidney disease/dialysis — multiple cysts form in previously non-cystic kidneys, and the key concern is an increased risk of renal cell carcinoma, warranting awareness and surveillance.
The big picture
Acquired cystic kidney disease (ACKD) is the development of multiple renal cysts in patients with chronic kidney disease — particularly those on long-term dialysis — whose kidneys were not previously cystic (i.e. not inherited polycystic kidney disease). The prevalence and cyst burden increase with dialysis duration. The clinically important association is an increased risk of renal cell carcinoma arising within these kidneys.
Multiple acquired cysts in the (usually small) native kidneys of a CKD/dialysis patient = ACKD — its key implication is an increased renal cell carcinoma risk, so stay alert and surveil/investigate solid or enhancing lesions.
Symptom sorter
The common presentation.
Diagnostic algorithm
Each step answers one question. Tap to expand.
Treatment ladder
Maintain awareness and surveillance for renal cell carcinoma, and manage complications; treat suspicious masses as renal cancers.
Procedure chooser
- Nephrectomy for a suspicious solid/enhancing mass (RCC) or major complications; consider native nephrectomy in selected pre-/post-transplant patients with suspicious lesions
Complications
- Renal cell carcinoma (key risk)
- Cyst haemorrhage, infection
- Nephrectomy/embolisation risks
- Surveillance and prompt investigation of suspicious lesions
- Treat RCC surgically; manage bleeding/infection
Follow-up
- Development of solid/enhancing lesions (RCC)
- Cyst complications (bleeding/infection)
- Renal/transplant status
- Surveillance imaging per risk (dialysis duration, transplant context)
- Early detection/exclusion of RCC; complications managed
- Missed RCC; significant haemorrhage
- Surveillance schedule; new symptoms or lesions
- Ongoing RCC risk; complications of cysts
If treatment fails
If a new lesion appears, ask: is this a solid/enhancing mass that should be treated as renal cell carcinoma?
Red flags
Possible renal cell carcinoma — investigate and manage as a renal mass.
Higher cyst burden and RCC risk — maintain surveillance awareness.
Think ADPKD, not ACKD — different disease.
Summary tables
Acquired cystic kidney disease essentials
| Item | Detail |
|---|---|
| Setting | CKD / long-term dialysis (acquired cysts) |
| Kidneys | Usually small (not enlarged) — unlike ADPKD |
| Key risk | Renal cell carcinoma |
| Management | Awareness/surveillance; investigate solid/enhancing lesions |
| Complications | Cyst haemorrhage, infection |
Memory hooks
ACKD = acquired cysts in CKD/dialysis kidneys.
Not inherited PKD (small kidneys, no family history).
Key risk: renal cell carcinoma.
Surveil; investigate solid/enhancing lesions.
Board traps
ACKD ≠ ADPKD (acquired vs inherited; small vs enlarged kidneys).
Increased renal cell carcinoma risk is the headline.
Solid/enhancing lesion → treat as a renal mass.
Clinical cases
A patient on haemodialysis for 9 years is found to have multiple cysts in both (small) native kidneys, with no family history of cystic disease. Imaging then shows a 3 cm solid enhancing lesion in one kidney.
What is the diagnosis and the concern?
A patient with massively enlarged kidneys, hepatic cysts and a strong family history is mislabelled as having acquired cystic kidney disease.
What is the correct diagnosis and why?