Fig. 2From: Jugular foramen and venous collaterals may help to discriminate congenital from post-thrombotic jugular stenosisInitial and follow-up computed tomography (CT) maps, and a representative case with jugular hypoplasia. Right jugular foramen (JF, white thin arrow) on baseline CT image (A1) appeared to be the same as that on 2-year CT follow-up (A2). A 39-year-old male for physical screening was imaged with narrowed ipsilateral JF (B1, white thin arrow) along with hypoplastic IJV (B2, white thin arrow) on CE-MRVBack to article page