Randy Holmes/ABC
March 12, 2009 12:00 AM

Last time we checked in on the doctors at Seattle Grace–three weeks for those of you counting–Izzie Stevens was either 1) losing her mind 2) has an undiagnosed medical illness or 3) is losing her mind because she has an undiagnosed medical illness, all of which would then explain her whole I-see-dead-Denny story line of this season. Well, tonight’s new episode of Grey’s (9 p.m. ET on ABC) promises to finally reveal Izzie’s condition. If you’re really dying to know, EW.com has the scoop on her condition.

Is Izzie a head case, does she have a brain tumor (as many GA fans believe) or will creator Shonda Rhimes pull out a shocking whole other diagnosis? Break out your medical dictionaries and diagnose what’s ailing Izzie before tonight’s GA reveal!

Randy Holmes/ABC

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