Retrolaminar migration as a complication of intraocular silicone oil injection detected on unenhanced CT

AIM: To describe the clinical and radiologic features of retrolaminar migration silicone oil (SiO) observe dynamic position ventricular accumulation in supine prone. METHODS: For this retrospective study, 29 patients who had a history SiO injection treatment underwent unenhanced head computed tomography (CT) were included from January 2019 to October 2022. The divided into migration-positive negative groups. Clinical CT compared using Whitney U Fisher's exact tests. was observed within system images visually assessed for along involving pathways vision (optic nerve, chiasm, tract) system. RESULTS: Intraocular found 5 (17.24%), with at optic nerve (n=1), (n=4), chiasm tract lateral ventricles (n=1). time interval between examination cases significantly higher than that migration-negative (22.8±16.5mo vs 13.1±2.6mo, P<0.001). hyperdense lesion located frontal horns right ventricle migrated fourth when changing CONCLUSION: Although is unusual, clinician radiologist should be aware routes. combined prone first-choice method confirm presence