case_images: PMC10786585_01
case_images: Patient's face with a herpetic rash along his left forehead.
case_images: cop-2024-0015-0001-535947_F01.jpg
case_images: PMC10786585_01_cop-2024-0015-0001-535947_F01.jpg
case_images: F1
case_images: He had a red rash along his forehead (Fig. 1).
case_images: Parks-Bielschowsky three-step test picture of the patient on the admission date.
case_images: cop-2024-0015-0001-535947_F02.jpg
case_images: PMC10786585_01_cop-2024-0015-0001-535947_F02.jpg
case_images: F2
case_images: This increased to 10 PD in the right gaze and 6 PD in the left head tilt, suggesting left superior oblique muscle paresis (shown in Fig. 2).
case_images: Magnetic resonance imaging revealed a subtle enhancement in the T1 phase with gadolinium (upper figure) and hypersignal T2 (lower figure) of the left cavernous sinus in the axial section.
case_images: cop-2024-0015-0001-535947_F03.jpg
case_images: PMC10786585_01_cop-2024-0015-0001-535947_F03.jpg
case_images: F3
case_images: T2 with faint enhancement of the left cavernous sinus (axial view shown in Fig. 3 and coronal view shown in Fig. 4). The trochlear nerve was not well defined due to neuroimaging quality.
case_images: Nine gaze positions of the patient at the 1-month follow-up.
case_images: cop-2024-0015-0001-535947_F05.jpg
case_images: PMC10786585_01_cop-2024-0015-0001-535947_F05.jpg
case_images: F5
case_images: The patient adapted his head posture to lessen the vertical diplopia (shown in Fig. 5).