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
[{'content': 'Cystic diseases of kidney are all except: \nSelect and explain. \nA. Medullary sponge kidney, B. Nephrophthisis, C. Horseshoe kidney, D. Glomerulocystic disease', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Horseshoe Kidney Fusion of the upper (10%) or lower poles (90%) of the kidneys Continuous across the midline anterior to the great vessels. Congenital renal anomaly not a cystic disease. Cystic lesions of kidney are: Polycystic kidney disease Autosomal dominant (adult) polycystic disease Autosomal recessive (childhood) polycystic disease Medullary cystic disease Medullary sponge kidney Nephronophthisis Glomerulocystic disease Extraparenchymal renal cysts (pyelocalyceal cysts, hilar lymphangitic cysts)', 'role': 'assistant'}]