case_images: PMC8102953_01
case_images: T2-weighted midsagittal magnetic resonance imaging scans revealing a progressive Chiari I malformation in a patient with unilateral sporadic retinoblastoma treated by enucleation of the left eye. Basion-opisthion line is shown to determine the herniation of cerebellar tonsils through the foramen magnum at 4.5-year-old (a) and 5-year-old (b) visits. Orbital socket filled with hydroxyapatite is also shown (c)
case_images: JCO-33-88-g001.jpg
case_images: PMC8102953_01_JCO-33-88-g001.jpg
case_images: F1
case_images: The progression of CIM was confirmed by the radiologist in the last MRI, which was performed at 5 years of age [Figure 1].