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
The usual location of Glomus jugular tumor is: 
Select and explain. 
A. Epitympanum, B. Hypotympanum, C. Mastoidal cell, D. Promontory
B: Hypotympanum
Answer: B: Hypotympanum 
Explanation: Ans. B Hypotympanum Glomus tumor is of 2 types: Glomus jugulare Glomus tympanicum Arises from: Dome of jugular bulb Hypotympanum Invades: Jugular foramen therefore involves cranial nerves IX to XII and compresses jugular vein Clinical features: * Signs of com pre ion of cranial nerves IX to XII Arises from Promontory of middle ear Clinical features: * Aural symptoms sometimes with facial paralysis