<prompt> Angular vein infection causes thrombosis in:Cavernous sinusSuprasaggital sinusTransverse sinusInferior petrosal sinus  <response>: Ans. A Cavernous sinusRef: Grays Anatomy, 40th ed. Ch; 29 The upper most segment of the facial vein, above its junction with the superior labial vein, is also called the angular vein. Any infection of the mouth or face can spread via the angular veins to the cavernous sinuses resulting in thrombosis. 