<prompt> The glomus tumour invasion of jugular bulb is diagnosed byCarotid angiographyVeebral venous venographyX-rayJugular venography  <response>: Jugular venography must be done to delineate multiple tumours, feeding vessels, embolization and involvement of jugular bulb, carotid aery or intradural extension. Ref: Dhingra 6th edition pg. 110 