meaning of "cast toes"

[Lost_Soul]

English Language Tests, Intermediate level

ESL/EFL Test #243 "Confusing Words test (16)", question 5

Steven broke his big toe but doctors don't usually ......... toes so he should be really careful until it heals.

(a) caste
(b) cast
(c) cost

English Language Tests, Intermediate level

ESL/EFL Test #243 "Confusing Words test (16)", answer 5

Steven broke his big toe but doctors don't usually cast toes so he should be really careful until it heals.

Correct answer: (b) cast

Your answer was: correct
_________________________

I dont understand what "cast toes" means,
could you give me an explanation, please

[NinaZara]

Hello,

When you break your bones, doctors cast them meaning to wrap them in a firm bandage. But when you break your toe, doctors would probably leave it open because your toe is too small to be cast. So you have to be careful.

Nina