Anamnesis

Identification: Gender/Age: Male, 45 years old

Medical History: Controlled hypertension, smoking (20 pack-years)

Risk Factors: Recent use of recreational cannabis and cocaine the previous weekend

History of Present Illness (HPI): Main symptom: Intense and sudden headache ("like a thunderclap") for 24 hours

Pain Characteristics:

Location: Bifrontal and occipital

Character: Pulsatile, thunderclap

Intensity: 9/10

Triggering factor: Appeared suddenly during intense physical activity (weightlifting)

Associated symptoms: Nausea, vomiting, and blurred vision

Course: Continuous pain, worsening with position changes

Physical/Neurological Examination:
General: Conscious, oriented, but anxious

Neurological:

No motor or sensory deficits

Normal and symmetrical reflexes

Fundoscopy: No abnormalities

Complementary Exams:
Non-contrast cranial CT: Normal

MR Angiography: Characteristic segmental narrowings in a "string of beads" pattern in the anterior and middle cerebral arteries

Lumbar puncture: Clear cerebrospinal fluid, normal pressure, no cellular or biochemical alterations

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