Here's cryptic clue for you Quinny (it
is the weekend, after all):-
When I hear Avril Lavigne sing, my blood cells self-hemolyze in their own version of ritual suicide.
For more like that, see
here.

Meanwhile (I'm no doctor), but I should imagine that the term refers to disorders resulting from an abnormality of the immune system that results in red blood cells being destroyed prematurely.

PS: Pity about the car.