In adult polycystic kidney, all are true except –
## Core Concept
Adult polycystic kidney disease (APKD), also known as autosomal dominant polycystic kidney disease (ADPKD), is a genetic disorder characterized by the growth of numerous cysts filled with fluid in the kidneys, which can lead to kidney failure. The condition is primarily associated with mutations in the **PKD1** or **PKD2** genes. The disease manifests with various renal and extrarenal complications.
## Why the Correct Answer is Right
The correct answer choice isn't directly provided, but based on common associations and facts about APKD:
- **Renal cysts and progression to kidney failure**: A hallmark of APKD is the development of multiple renal cysts, which can impair kidney function over time.
- **Autosomal dominant inheritance**: The disease follows an autosomal dominant pattern, meaning a mutation in one of the two copies of the gene is sufficient to cause the condition.
- **Extrarenal manifestations**: Patients with APKD can have extrarenal manifestations, including liver cysts, intracranial aneurysms, and cardiac abnormalities.
## Why Each Wrong Option is Incorrect
Without specific details on the options provided (A, B, C, D), a general approach to evaluating incorrect statements about APKD:
- **Option A:** If a statement claims APKD is inherited in an autosomal recessive pattern, it would be incorrect because APKD is primarily inherited in an **autosomal dominant** manner.
- **Option B:** If a statement suggests that APKD only affects the kidneys, it would be incorrect because APKD can have **extrarenal manifestations**, such as liver cysts and vascular abnormalities.
- **Option C:** If a statement implies that all individuals with APKD will develop end-stage renal disease (ESRD) by a certain age, it would be an oversimplification. While many individuals with APKD will develop ESRD, the **age of onset and progression rate vary widely** among affected individuals.
- **Option D:** Without specifics, any claim that contradicts established facts about APKD (e.g., stating there's a cure, or that it's exclusively associated with a particular extrarenal manifestation) would be incorrect based on the nuances of the disease.
## Clinical Pearl / High-Yield Fact
A key point to remember is that **autosomal dominant polycystic kidney disease (ADPKD) is a leading genetic cause of kidney failure in adults**. Early diagnosis and monitoring are crucial, as interventions can help manage symptoms and slow disease progression. The presence of **multiple bilateral renal cysts** on imaging in a patient with a family history of the disease is highly suggestive of APKD.
## Correct Answer: D.