All of the following statements are true about adult polycystic kidney disease, except:
**Core Concept**
Adult polycystic kidney disease (APKD) is a genetic disorder characterized by the development of multiple cysts in the kidneys, leading to progressive renal dysfunction and eventual end-stage renal disease. The disease is caused by mutations in the PKD1 or PKD2 genes, which encode for polycystin-1 and polycystin-2 proteins, respectively. These proteins play a crucial role in maintaining the structure and function of renal epithelial cells.
**Why the Correct Answer is Right**
The correct answer will be the statement that is not true about APKD. The disease is indeed characterized by the development of multiple cysts in the kidneys, which can grow to a large size and cause renal dysfunction. The cysts are typically filled with fluid and can contain a solid component. The disease is inherited in an autosomal dominant pattern, meaning that a single copy of the mutated gene is sufficient to cause the disease. The cysts can cause a range of symptoms, including hematuria, proteinuria, and hypertension.
**Why Each Wrong Option is Incorrect**
**Option A:** APKD is not typically associated with liver cysts. While liver cysts can occur in APKD, they are not a characteristic feature of the disease.
**Option B:** APKD is not typically associated with a high risk of pancreatic cancer. However, patients with APKD are at increased risk of developing pancreatic cysts and solid pancreatic tumors.
**Option C:** APKD is not typically associated with a high risk of intracranial aneurysms. However, patients with APKD are at increased risk of developing intracranial aneurysms, which can rupture and cause subarachnoid hemorrhage.
**Option D:** APKD is indeed associated with a high risk of cardiovascular disease, including hypertension, coronary artery disease, and stroke.
**Clinical Pearl / High-Yield Fact**
Patients with APKD should be screened for other systemic manifestations of the disease, including intracranial aneurysms, pancreatic cysts, and cardiac valvular abnormalities.
**Correct Answer: A. APKD is not typically associated with liver cysts.