Fig. 1
From: Optic disc drusen mimicking Idiopathic Intracranial Hypertension (IIH): rely on ultrasound
Transorbital Ultrasound Findings in suspected IIH revealing Optic Disc Drusen. B-Mode transorbital sonography ruled out enlargement of the optic nerve sheath diameter as measured 3 mm posterior to the globe (right 0.45 cm, left 0.52 cm, normal limits < 0.51 cm for European population [2]) due to underlying IIH (Panels a & b). Calcified optic disc drusen appeared as hyperechoic, highly reflective structures with posterior acoustic shadow (red-circle; Panels c & d)