FIG 5.

Intracranial aVP detection of asymptomatic DL in a participant with MS without a previous AON history (patient with MS No. 0020) on 3D-T2-STIR-ZOOMit images. A₁, and B₁, Bilateral DLs partially affecting the OTs and impairing tissue contrast (arrowheads) with the adjacent hypothalamus ventrolateral aspects (asterisks). C₁, Further depiction of DLs with partial involvement of the OC (arrowheads). All these lesions were not detectable on 2D-T2-STIR (middle panel, B₂, C₂). The right panel (A₃, B₃, C₃) provides the reference normal anatomy (empty arrowheads) from a healthy control (No. 9005). Because of the axial plane appearance of the OTs and hypothalamus ventrolateral aspects resembling lobster antennas, we propose the “lobster antenna” sign to indicate loss of normal tissue contrast between the OT and hypothalamus. Thin arrows in A₁ and A₃ indicate the mammillary bodies, corresponding to the lobster's eyes in the artwork (A₂). Courtesy of Dr. Andrea Diociasi.