Anamnesis

Identification: Male patient, 32 years old, previously healthy.

History of Present Illness:

Reports sudden onset of bilateral, frontotemporal headache, pulsatile in nature and of mild to moderate intensity, occurring 5 minutes after inhalation of nitric oxide (NO) during an anesthetic procedure for elective surgery.

Duration: 1 hour, with spontaneous resolution.

Not associated with nausea, vomiting, photophobia, or phonophobia.

Denies previous history of primary headaches (e.g., migraine, tension-type headache).

Physical/Neurological Examination: Unremarkable.

Report this case — e.g. suspected re-identification risk.