What is wrong with belle in home and away?

i missed a few episodes and now she is dying? what does she illness does she have? is this how she will be leaving the show? thanks heaps|||I think she's supposed to have some rare form of cancer although it hasn't been confirmed yet. It was confirmed that she filmed her last scenes with the show in May.|||belle is no longer on the show. as well as Belle,mimi,rex and cassie.