<prompt> Which sign is seen due to thrombosis of mastoid emissary veins?Battle signGresinger signIrwin Moore SignHennebes sign  <response>: Ans. isbi.e., Gresinger sign Ref Dhingra 5the p. 95 Griesingers sign: - Edema over the posterior pa of mastoid due to thrombosis of mastoid emissary veins. 