This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'True about slipped femoral capital epiphysis is: \nSelect and explain. \nA. Seen in thin children, B. Treethowan sign seen, C. Major traumatic condition, D. Seen in adults', 'role': 'user'}, {'content': "Answer: B \nExplanation: Slipped capital femoral epiphysis (SCFE) mainly occurs between the ages of 10 and 16 years. SCFE results from a Salter-Harris type physeal fracture. In patients with SCFE, the epiphyseal growth plate is unusually widened, primarily due to expansion of the zone of hyperophy. Trethowan's sign: A line (Klein's line) drawn along the superior border of the femoral neck transects the femoral head. In SCFE the line passes above the femoral head.", 'role': 'assistant'}]