<prompt> Greisingers sign is suggestive of-Acute mastoiditis with lateral sinus thrombosisMaxillary cancer with spread to nasal cavityRhinosporidiosisJugular vein thrombosis  <response>: Ans. is a i.e., Acute mastoiditis with lateral sinus thrombosis Signs of lateral sinus thrombosis sigmoid sinus thrombosiso Griesingers sign:- odema over the posterior part of mastoid due to thrombosis of mastoid emissary veinso Papilloedemao Tobey-Ayer testo Crowe-Beck test:- Pressure on jugular vein of healthy side produces engorgement of retinal veins. Pressure on affected side does not produce such changeo Tenderness along jugular vein 