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: ENT
[{'content': "Frey's syndrome is caused by ? \nSelect and explain. \nA. Post traumatic nerve fibres of facial nerve with parasympathetic of auriculotemporal nerve, B. Greater auricular with auriculotemporal nerve, C. Facial nerve with greater auricular nerve, D. None", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Post traumatic nerve fibres of facial nerve with parasympathetic of auriculotemporal nerve Frey's syndrome (gustatory sweating) Gustatory sweating or Frey's syndrome involves post-parotidectomy facial sweating and skin flushing while eating. The symptoms usually occur several months or even years after parotid surgery. The likely pathophysiology is aberrant regeneration of postganglionic secretomotor parasympathetic nerve fibres (originating from the otic ganglion) misdirected through several axonal sheaths of post-ganglionic sympathetic fibres feeding the sweat glands. These sympathetic fibres are to the sweat glands of the skin in the dissected field. The frey's syndrome is likely due to injury to auriculotemporal nerve with faulty regeneration, therefore Frey's syndrome is also known as Auriculotemporal syndrome. A variant of Frey's syndrome in which there is gustatory facial flushing but not sweating, occurs following facial paralysis due to faulty regeneration following injury to the facial nerve. So, Frey's syndrome is not limited to parotid surgery with injury to auriculotemporal nerve.", 'role': 'assistant'}]