The jugular "notch".
A characteristic "notch" in the petrous bone is described in relation to the superior outline of the jugular foramen. This notch seems to be a congenital anomaly and has a close relationship with ectasia of the dome of the internal jugular vein, as was demonstrated in two patients.
D005260:Female; D006801:Humans; D007601:Jugular Veins / Q000002:abnormalities* / Q000000981:diagnostic imaging; D008575:Meniere Disease / Q000209:etiology; D008875:Middle Aged; D008954:Models, Biological; D009777:Occipital Bone / Q000000981:diagnostic imaging*; D010579:Petrous Bone / Q000000981:diagnostic imaging*; D011859:Radiography