Late presentation of primary headache associated with sexual activity: is non-invasive angiography worthwhile?

The place of angiography in late presentation of headache associated with sexual activity has not been defined, unlike the situation with acute presentations. In a cohort of patients fulfilling diagnostic criteria for primary headache associated with sexual activity and presenting late (at least three weeks after headache onset), those undergoing non-invasive angiography showed no abnormalities. It is suggested that non-invasive angiography is not routinely indicated in late presentations of headache associated with sexual activity.