This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Imaging of Metabolic Bone Disease, Subject name: Radiology
[{'content': '"Umbau Zones" are seen in all except -(AP 90) \nSelect and explain. \nA. Osteomalacia, B. Rickets, C. Osteogenesis imperfecta, D. Osteomyelitis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Looser zones, also known as cortical infractions, Milkman's linesor (Looser-)Umbauzonen, are wide, transverse lucencies traversing part way through a bone, usually at right angles to the involved cortex and are associated most frequently with osteomalacia and rickets. They are pseudofractures and considered a type of insufficiency fracture. Typically, the fractures have sclerotic irregular margins and are often symmetrical. Aetiology osteomalacia renal osteodystrophy fibrous dysplasia hyperthyroidism Paget disease of bone X-linked hypophosphataemia osteogenesis imperfecta", 'role': 'assistant'}]