Short-Lasting Unilateral Neuralgiform Headache Attacks

Cluster Headache, SUNCT, and SUNA

OBJECTIVE

This article reviews the epidemiology, clinical features, differential diagnosis, pathophysiology, and management of three types of trigeminal autonomic cephalalgias: cluster headache (the most common), short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT), and short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms (SUNA).

LATEST DEVELOPMENTS

The first-line treatments for trigeminal autonomic cephalalgias have not changed in recent years: cluster headache is managed with oxygen, triptans, and verapamil, and SUNCT and SUNA are managed with lamotrigine. However, new successful clinical trials of high-dose prednisone, high-dose galcanezumab, and occipital nerve stimulation provide additional options for patients with cluster headache. Furthermore, new genetic and imaging tests in patients with cluster headache hold promise for a better understanding of its pathophysiology.

ESSENTIAL POINTS

The trigeminal autonomic cephalalgias are a group of diseases that appear similar to each other and other headache disorders but have important differences. Proper diagnosis is crucial for proper treatment.

SUNCT, SUNA and short-lasting unilateral neuralgiform headache attacks: Debates and an update

BACKGROUND

Short-lasting unilateral neuralgiform headache attacks (SUNHA) have the features of both short-lasting unilateral neuralgiform pain, such as trigeminal neuralgia or stabbing headache, and associated trigeminal autonomic symptoms, such as paroxysmal hemicrania or cluster headache. Recognizing and adequately treating SUNHA is essential but current treatment methods are ineffective in treating SUNHA.

METHODS

We reviewed the changes in the concept of short-lasting unilateral neuralgiform headache attacks and provide a narrative review of the current medical and surgical treatment options, from the first choice of treatment for patients to treatments for selective intractable cases.

RESULTS

Unlike the initial impression of an intractable primary headache disorder affecting older men, SUNHA affects both sexes throughout their lifespan. One striking feature of SUNHA is that the attacks are triggered by cutaneous or intraoral stimulation. The efficacy of conventional treatments is disappointing and challenging, and preventive therapy is the mainstay of treatment because of highly frequent attacks of a very brief duration. Amongst them, lamotrigine is effective in approximately two-third of the patients with SUNHA, and intravenous lidocaine is essential for the management of acute exacerbation of intractable pain. Topiramate, oxcarbazepine and gabapentin are considered good secondary options for SUNHA, and botulinum toxin can be used in selective cases. Neurovascular compression is commonly observed in SUNHA, and surgical approaches, such as neurovascular compression, have been reported to be effective for intractable cases.

CONCLUSIONS

Recent advances in the understanding of SUNHA have improved the recognition and treatment approaches for this unique condition.

Treatment of SUNCT/SUNA, Paroxysmal Hemicrania, and Hemicrania Continua: An Update Including Single-Arm Meta-analyses

Purpose of Review

This review presents a critical appraisal of the treatment strategies for short-lasting unilateral neuralgiform headache attacks (SUNHA), paroxysmal hemicrania (PH), and hemicrania continua (HC). We assess the available, though sparse, evidence on both medical and surgical treatments. In addition, we present estimated pooled analyses of the most common treatments and emphasize recent promising findings.

Recent Findings

The majority of literature available on the treatment of these rare trigeminal autonomic cephalalgias are small open-label observational studies and case reports. Pooled analyses reveal that lamotrigine for SUNHA and indomethacin for PH and HC are the preventative treatments of choice. Second-line choices include topiramate, gabapentin, and carbamazepine for SUNHA; verapamil for PH; and cyclooxygenase-2 inhibitors and gabapentin for HC. Parenteral lidocaine is highly effective as a transitional treatment for SUNHA. Novel therapeutic strategies such as non-invasive neurostimulation, targeted nerve and ganglion blockades, and invasive neurostimulation, including implanted occipital nerve stimulators and deep brain stimulation, appears to be promising options.

Summary

At present, lamotrigine as a prophylactic and parenteral lidocaine as transitional treatment remain the therapies of choice for SUNHA. While, by definition, both PH and CH respond exquisitely to indomethacin, evidence for other prophylactics is less convincing. Evidence for the novel emerging therapies is limited, though promising.

Short-Lasting Unilateral Neuralgiform Headache Attacks with Conjunctival Injection and Tearing (SUNCT) Status Like Condition: A Rare Case Report and Review of the Literature

Background:

SUNCT (short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing) is rare trigeminal autonomic cephalgia characterized by recurrent, brief, excruciating unilateral, intermittent headache paroxysms over orbital, frontal or temporal region occurring multiple times per day and it can rarely present as “SUNCTstatus like condition” (SSLC).

Case Report:

A 28-year old male with a history of SUNCT headache for 6 months presented with left forehead stabs lasting for 30 seconds with a frequency of 40-45 episodes per hour for three days followed by infective gastroenteritis. His neurological examination was normal, except left-sided ptosis, tearing, and conjunctival injection. His MRI brain with contrast, MR angiography, and laboratory investigations were unremarkable except mild hypokalemia. He was treated with intravenous fluids, potassium replacement, and high dose methylprednisolone along with an escalated dose of carbamazepine.

Review and Conclusion:

We have reviewed the previously reported seven cases and our case of SSLC. Female: Male ratio was 3:1and the mean age was 40.87 years. Three patients responded to high dose steroids and three to lignocaine along with rapid escalation or change of anticonvulsant drugs. One case responded to the high dose of lamotrigine, and in a pregnant lady, the pain subsided only after the termination of the pregnancy. One case was secondary to multiple sclerosis, while the rest of seven were primary episodic SSLC. The condition is highly disabling, and the treatment with steroids or lignocaine, along with the rapid escalation of preventive drugs, can provide long-lasting relief

Short-Lasting Unilateral Neuralgiform Headache Attacks with Conjunctival Injection and Tearing (SUNCT) Status Like Condition: A Rare Case Report and Review of the Literature

Background:

SUNCT (short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing) is rare trigeminal autonomic cephalgia characterized by recurrent, brief, excruciating unilateral, intermittent headache paroxysms over orbital, frontal or temporal region occurring multiple times per day and it can rarely present as “SUNCTstatus like condition” (SSLC).

Case Report:

A 28-year old male with a history of SUNCT headache for 6 months presented with left forehead stabs lasting for 30 seconds with a frequency of 40-45 episodes per hour for three days followed by infective gastroenteritis. His neurological examination was normal, except left-sided ptosis, tearing, and conjunctival injection. His MRI brain with contrast, MR angiography, and laboratory investigations were unremarkable except mild hypokalemia. He was treated with intravenous fluids, potassium replacement, and high dose methylprednisolone along with an escalated dose of carbamazepine.

Review and Conclusion:

We have reviewed the previously reported seven cases and our case of SSLC. Female: Male ratio was 3:1and the mean age was 40.87 years. Three patients responded to high dose steroids and three to lignocaine along with rapid escalation or change of anticonvulsant drugs. One case responded to the high dose of lamotrigine, and in a pregnant lady, the pain subsided only after the termination of the pregnancy. One case was secondary to multiple sclerosis, while the rest of seven were primary episodic SSLC. The condition is highly disabling, and the treatment with steroids or lignocaine, along with the rapid escalation of preventive drugs, can provide long-lasting relief

Differential diagnosis short-lasting unilateral neuralgiform headache attacks and trigeminal neuralgia

The article presents diagnostic criteria, comparative characteristics of short-lasting unilateral neuralgiform headache attacks, including short-term unilateral neuralgic headaches with conjunctival injection and lacrimation (SUNCT) and short-term unilateral neuralgic headaches with cranial autonomic symptoms (SUNA), differential diagnosis with trigeminal neuralgia.