1 of 5
Johnny's parents hide the encyclopedia in an attempt to shield him from learning that his tumor may cause ___.

2 of 5
What is the name of the condition that damages Johnny's optic nerve, causing loss of peripheral vision?

3 of 5
What illegal practice do Johnny's doctors suggest to his parents as a merciful final option?

4 of 5
What kind of gas is Johnny injected with after Frances reads an article about its potential to improve tumors?

5 of 5
Gunther and Francis drive Johnny to Gerson's nursing home on ___.