who does alex marry on grey's anatomy
Alex Karev Later in their relationship, Izzie begins hallucinating about Denny, and uncovers the fact she has metastatic melanoma (Stage IV) with an estimated chance of 5% survival. It is revealed that Izzie's hallucinations of Denny are, in fact, caused by her tumor. Alex is shocked by the news, but finds the strength to stay by her side. Izzie plans a wedding for Meredith and Derek, but when Derek finds Izzie has another inoperable tumor in her brain, they give the wedding to Izzie and Alex, who marry in front of all their friends. Izzie debates whether or not she should undergo a risky surgery to remove her tumor and Alex supports her, but eventually insists that she should have the surgery. Alex performs CPR on Izzie after she flatlines.