When the diagnosis is "stroke," what is the pathology?
D000328:Adult; D000368:Aged; D001921:Brain / Q000000981:diagnostic imaging; D002339:Carotid Arteries / Q000601:surgery; D002533:Cerebral Angiography; D002536:Cerebral Arteries / Q000601:surgery; D002561:Cerebrovascular Disorders / Q000175:diagnosis* / Q000473:pathology; D004569:Electroencephalography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D011877:Radionuclide Imaging