Cluster headache: to scan or not to scan.

By definition, cluster headache (CH) is not caused by underlying structural pathology. However, patients with CH or CH-like syndromes and an associated structural lesion have been described. In many cases it is difficult to establish a causal relation between the headache syndrome and the lesion.

Trigeminal autonomic cephalgias due to structural lesions: a review of 31 cases.

Trigeminal autonomic cephalgias (TACs) include cluster headache, paroxysmal hemicrania, and short-lasting unilateral neuralgiform headache with conjunctival injection and tearing. Associated structural lesions may be found, but a causal relationship is often difficult to establish. We sought to identify clinical predictors of underlying structural abnormalities by reviewing previously described and new TAC and TAC-like cases associated with a structural lesion.

Chronic cluster headache: a review.

Cluster headache (CH) is a rare but severe headache disorder characterised by repeated unilateral head pain attacks accompanied by ipsilateral autonomic features. In episodic CH, there are periods of headache attacks with pain-free intervals of weeks, months or years in between. A minority of patients have the chronic form, without pain-free intervals between the headache attacks.