'That was kind of surreal - "here’s this layer, here’s this layer, down to the brain stem. DIPG is a tumor that affects the brain stem, just at the top of the spinal cord, and it is 'diffuse' (spread), meaning there is no clear separation between the brain stem and the tumor. DIPG is a tumor that affects the brain stem, just at the top of the spinal cord, and it is 'diffuse' (spread), meaning there is no clear separation between the brain stem and the tumor. The brain stem consists of the medulla (at the bottom), the pons (in the middle) and the mid-brain (at the top). There is no line between Sophie’s tumor and the brain stem, and it does cover the pons.

Source: Daily Mail June 20, 2019 18:22 UTC