Intensive Cancer Screening After Cryptogenic Stroke

This study screens for hidden cancer in people who have had a cryptogenic stroke — a stroke where no clear cause was found despite thorough investigation. Emerging research suggests that some unexplained strokes may be caused by undetected cancers releasing blood clots. This study uses PET/CT scans to look for undiagnosed cancer in stroke patients within 3 months of their event. **You may be eligible if...** - You are 18 or older - You had a first-time ischemic stroke (a stroke caused by a blockage) with no clear cause found (cryptogenic stroke) - You have had this stroke within the past 3 months - You are being seen at the Ottawa Hospital - You (or a delegate) can provide informed consent **You may NOT be eligible if...** - You are pregnant or unable to lie still for 20 minutes (which is needed for the PET/CT scan) - You have a known current cancer or have previously been diagnosed with cancer (other than common skin cancers) Talk to your doctor to see if this trial is right for you.