Greek mythology isn't brain surgery... or is it?

From Rivka Galchen's article on Elmhurst Hospital, The New Yorker, May 13, 2013:

A young, very dark-skinned patient was jogging lightly up and down the hall. His brain appeared to be herniating out of his skull and, indeed, it was, because he had had a portion of his skull removed, with the goal of safely accommodating brain swelling. [...] The swelling goes down; the piece of skull bone, having been stored in the patient's thigh, is eventually returned to its proper location.

So wait. If you have brain swelling, first they cut your skull open, then they store a piece of it in your thigh? OH MY GOD, THIS IS LIKE ATHENA AND DIONYSUS IN ONE.

It's enough to make me want to get a swelled head.