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: Orthopaedics
[{'content': 'Pathognomonic sign of traumatic fracture is - \nSelect and explain. \nA. Redness, B. Swelling, C. Crepitus, D. Tenderness', 'role': 'user'}, {'content': 'Answer: C \nExplanation: This question is slightly different from the previous one. Here the examiner is asking about the pathognomonic feature (not most consistent feature) both are different :\nA most consistent feature is the one which is always present in a fracture\n\na. The pathognomonic feature is the one whose presence is diagnostic of a fracture\n\nAbnormal mobility at the fracture site and crepitus are two pathognomonic features of a fracture:-\n\n\n1. Abnormal mobility is the most pathognomonic sign of a fracture:-\n\n"Abnormal mobility in the limb at the fracture site is diagnostic of a fracture". ____ Essentials of orthopaedics surgery\n"Abnormal mobility in fracture of a bone is characteristic or pathognomonic".___ British medical journal\n"Abnormal mobility between the fracture fragments is a sure sign of fracture". ____\xa0Ebnezar\n\n2. Crepitus is the second most pathognomonic sign of a fracture (after abnormal mobility):-\n\n"Crepitus can be considered as pathognomonic as abnormal mobility for a fracture". — Emergency medicine\n"Crepitus is common and essentially a reliable sign of a fracture". ____\xa0Orthonet\n"Crepitus with abnormal mobility is pathognomonic of a fracture". ____\xa0Miller', 'role': 'assistant'}]