system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Brown's sign is seen In
assistant
The correct answer is  Brown's sign, also called pulsation sign, is seen in glomus tumour. When pressure is raised in the ear canal with a Siegel's speculum, tumour first pulsates vigorously and then blanches; reverse occurs when pressure is released.