Framing comorbidities and co-occurrences in a migraine with aura patient

The 2013 3rd edition of the Classification of Headache Disorders (ICHD-3 β) established that a de novo headache occurring with another disorder recognized to be capable of causing it should always be diagnosed as secondary. This remains true even when the de novo headache phenomenologically is a primary headache (i.e. migraine with aura, code1.2) (MwA). MwA is a primary headache disorder while the headache or facial or neck pain attributed to cervical arterial dissection (ICHD-3 β code 6.5.1) is a subform of headache attributed to cervical carotid or vertebral artery disorder (code 6.5) listed in the ICHD-3 β as a secondary headache.