This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Polycystic Kidney Disease, Subject name: Pathology
Which of the following statements is wrong regarding adult polycystic kidney disease? 
Select and explain. 
A. Kidneys are enlarged in size, B. The presentation is unilateral, C. Patients tend to have external congenital anomalies, D. Mitral valve prolapse may be there
B: The presentation is unilateral
Answer: B: The presentation is unilateral 
Explanation: Autosomal Dominant (Adult) Polycystic Kidney Disease Hereditary disorder Multiple expanding cysts of both kidneys that leads to destruction of renal parenchyma. Bilateral. Gross appearance : The kidneys are bilaterally enlarged and weighs as much as 4 kg each. Microscopic examination: Functioning nephrons dispersed between the cysts. Individuals with polycystic kidney disease also tend to have extra-renal congenital anomalies. Mitral valve prolapse