SUNCT/SUNA: ¿frecuentemente mal diagnosticada como neuralgia del trigémino? / SUNCT/SUNA: frequently misdiagnosed as trigeminal neuralgia?

Objetivo: Identificar el número de casos con posible diagnóstico de cefalea neuralgiforme unilateral de corta duración con inyección conjuntival y lagrimeo (SUNCT) o cefalea neuralgiforme unilateral de corta duración con síntomas autonómicos craneales (SUNA) en pacientes con un previo diagnóstico de neuralgia del trigémino (NT) en el servicio de neurología del Centro Médico Nacional 20 de Noviembre, comprobando así que estas cefaleas trigeminoautonómicas deben ser descartadas y consideradas como diagnósticos diferenciales de la NT. Pacientes y métodos: Estudio transversal y retrospectivo. Se evaluaron los expedientes clínicos electrónicos completos de 100 pacientes con diagnóstico de NT durante el período de abril de 2010 a mayo de 2020. Intencionalmente se buscaron síntomas autonómicos en éstos y se compararon con los criterios diagnósticos de SUNCT y SUNA de la Clasificación Internacional de las Cefaleas, tercera edición. Se realizaron pruebas de chi cuadrado y posteriormente de regresión bivariada para determinar la asociación entre las variables. Resultados: Se incluyó a 100 pacientes con diagnóstico de NT. Tras la revisión de las manifestaciones clínicas, se encontró a 12 pacientes con síntomas autonómicos y se compararon con los criterios diagnósticos de SUNCT y SUNA. Estos no cumplieron los criterios absolutos para ser diagnosticados con las enfermedades previamente mencionadas; sin embargo, cumplieron las características del espectro de cefaleas trigeminoautonómicas. Conclusión: La NT es una entidad dolorosa y frecuente que puede presentar síntomas autonómicos, y es importante pensar en diagnósticos diferenciales, como la SUNCT y la SUNA, para la identificación y el tratamiento correctos.(AU)

Objective: Identify the number of cases with a possible diagnosis of short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) or short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms (SUNA) in patients with a previous diagnosis of Trigeminal Neuralgia (TN) at the Neurology Service of the National Medical Center 20 de Noviembre. This will confirm that these trigeminal-autonomic cephalalgias should be ruled out and considered as differential diagnoses of trigeminal neuralgia. Patients and methods: Cross-sectional and retrospective study. The complete electronic medical records of 100 patients with a diagnosis of TN were evaluated during the period from April 2010 to May 2020. Autonomic symptoms were intentionally searched for in these patients and compared with the diagnostic criteria of SUNCT and SUNA of the 3rd edition of the International Classification of Headache Disorders. Chi-square tests and subsequent bivariate regression were performed to determine the association between variables. Results: One hundred patients with a diagnosis of TN were included. After reviewing the clinical manifestations, 12 patients with autonomic symptoms were found and compared with the diagnostic criteria of SUNCT and SUNA. However, they did not meet the absolute criteria to be diagnosed with the previously mentioned diseases, nor to be ruled out. Conclusions: TN is a painful and frequent entity that can present with autonomic symptoms, therefore making it important to identify SUNCT and SUNA as differential diagnoses, to recognize them and treat them appropriately.(AU)

Short-lasting unilateral neuralgiform headache attacks (SUNCT/SUNA): a narrative review of interventional therapies.

Short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) and short-lasting unilateral neuralgiform headache with autonomic symptoms (SUNA) are disabling primary headache disorders. The advent of advanced imaging technologies and surgical techniques has translated to a growing arsenal of interventional therapies capable of treating headache disorders. This literature review sheds light on the current evidence available for interventional therapies in medically intractable SUNCT/SUNA. PubMed and EMBASE were searched for publications between 1978 and 2022. Inclusion criteria were SUNCT/SUNA studies reporting outcomes following occipital nerve stimulation (ONS), pulsed radiofrequency (PRF) of sphenopalatine ganglion (SPG), stereotactic radiosurgery (SRS), deep brain stimulation (DBS) or microvascular decompression (MVD) of the trigeminal nerve. A greater than 50% reduction in severity or a greater than 50% reduction in the number of attacks was defined as a successful response. The rate of successful responses for the various treatment modalities were as follows: ONS 33/41 (80.5%), PRF of SPG 5/9 (55.6%), DBS of the ventral tegmental area 14/16 (86.7%), SRS to the SPG and/or trigeminal nerve 7/9 (77.8%) and MVD 56/73 (76.7%). Mean follow-up time in months was 42.5 (ONS), 24.8 (PRF), 25.3 (DBS), 20.8 (SRS) and 42.4 (MVD). A significant proportion of SUNCT/SUNA patients remain refractory to medical therapy (45%-55%). This review discusses existing literature on interventional approaches, including neuromodulation, radiofrequency ablation, gamma knife radiosurgery and MVD. The outcomes are promising, yet limited data exist, underscoring the need for further research to develop a robust surgical management algorithm.

Similarities and differences between SUNCT and SUNA: a cross-sectional, multicentre study of 76 patients in China.

BACKGROUND: Short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) and short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms (SUNA) have not been evaluated sufficiently due to limited data, particularly in China. METHODS: Patients with SUNCT or SUNA treated in a tertiary headache centre or seven other headache clinics of China between April 2009 and July 2022 were studied; we compared their demographics and clinical phenotypes. RESULTS: The 45 patients with SUNCT and 31 patients with SUNA had mean ages at onset of 37.22 ± 14.54 years and 42.45 ± 14.72 years, respectively. The mean ages at diagnosis of SUNCT and SUNA were 41.62 ± 12.70 years and 48.68 ± 13.80 years, respectively (p = 0.024). The correct diagnosis of SUNCT or SUNA was made after an average of 2.5 (0-20.5) years or 3.0 (0-20.7) years, respectively. Both diseases had a female predominance (SUNCT: 1.14:1; SUNA: 2.10:1). The two diseases differed in the most common attack site (temporal area in SUNCT, p = 0.017; parietal area in SUNA, p = 0.002). Qualitative descriptions of the attacks included stabbing pain (44.7%), electric-shock-like pain (36.8%), shooting pain (25.0%), and slashing pain (18.4%). Lacrimation was the most common autonomic symptom in both SUNCT and SUNA patients, while eyelid oedema, ptosis, and miosis were less frequent. Triggers such as cold air and face washing were shared by the two diseases, and they were consistently ipsilateral to the attack site. CONCLUSIONS: In contrast to Western countries, SUNCT and SUNA in China have a greater female predominance and an earlier onset. The shared core phenotype of SUNCT and SUNA, despite their partial differences, suggests that they are the same clinical entity.

Medical treatment of SUNCT and SUNA: a prospective open-label study including single-arm meta-analysis.

INTRODUCTION: The management of short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) and short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms (SUNA) remains challenging in view of the paucity of data and evidence-based treatment recommendations are missing. METHODS: In this single-centre, non-randomised, prospective open-label study, we evaluated and compared the efficacy of oral and parenteral treatments for SUNCT and SUNA in a real-world setting. Additionally, single-arm meta-analyses of the available reports of SUNCT and SUNA treatments were conducted. RESULTS: The study cohort comprised 161 patients. Most patients responded to lamotrigine (56%), followed by oxcarbazepine (46%), duloxetine (30%), carbamazepine (26%), topiramate (25%), pregabalin and gabapentin (10%). Mexiletine and lacosamide were effective in a meaningful proportion of patients but poorly tolerated. Intravenous lidocaine given for 7-10 days led to improvement in 90% of patients, whereas only 27% of patients responded to a greater occipital nerve block. No statistically significant differences in responders were observed between SUNCT and SUNA. In the meta-analysis of the pooled data, topiramate was found to be significantly more effective in SUNCT than SUNA patients. However, a higher proportion of SUNA than SUNCT was considered refractory to medications at the time of the topiramate trial, possibly explaining this isolated difference. CONCLUSIONS: We propose a treatment algorithm for SUNCT and SUNA for clinical practice. The response to sodium channel blockers indicates a therapeutic overlap with trigeminal neuralgia, suggesting that sodium channels dysfunction may be a key pathophysiological hallmark in these disorders. Furthermore, the therapeutic similarities between SUNCT and SUNA further support the hypothesis that these conditions are variants of the same disorder.

SUNCT/SUNA in children and adolescents: Application of ICHD-3 criteria and treatment response: Case series of 13 SUNCT/SUNA pediatric cases.

INTRODUCTION: Trigeminal autonomic cephalalgias (TACs) are characterized by paroxysmal attacks of unilateral primary headaches associated with ipsilateral craniofacial autonomic symptoms. In this pediatric case series, 13 cases of short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT)/short-lasting unilateral neuralgiform headache with autonomic symptoms (SUNA), including children ages 3-18 years, are discussed. This paper reviews the application of International Classification of Headache Disorders, 3rd edition (ICHD-3) criteria especially in children presenting with SUNCT or SUNA. This is the largest pediatric case series of SUNCT/SUNA reported in the literature. BACKGROUND: Trigeminal autonomic cephalalgias are rare in children and adolescents, with SUNCT/SUNA having the least reported cases. We will discuss the application of ICHD-3 criteria to diagnose SUNCT/SUNA in children and review overlapping cases and their response to different treatment options including indomethacin, which is typically reserved for specific subtypes of TACs; for example, paroxysmal hemicrania. CONCLUSION: This case series presents a unique opportunity to aid in the diagnosis and treatment of similar pediatric cases in the future. It helps us to broaden the ICHD-3 criteria to diagnose and treat different overlapping trigeminal autonomic cephalalgia cases in children.

SUNCT/SUNA: Case series presenting in an orofacial pain clinic.

AIM: Little is known about short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) and short-lasting unilateral neuralgiform headache attacks with cranial autonomic symptoms (SUNA). We present our experience with SUNCT/SUNA patients to aid identification and management of these disorders. METHODS: A retrospective review of patient records of one orofacial pain clinic was performed. Inclusion criteria was a diagnosis of SUNCT/SUNA confirmed with at least one follow-up visit. RESULTS: Six of the 2464 new patients seen between 2015-2018 met the selection criteria (SUNCT n = 2, SUNA n = 4). Gender distribution was one male to one female and average age of diagnosis was 52 years (range 26-62). Attacks were located in the V1/V2 trigeminal distributions, and five patients reported associated intraoral pain. Pain quality was sharp, shooting, and burning with two patients reporting "numbness". Pain was moderate-severe in intensity, with daily episodes that typically lasted for seconds. Common autonomic features were lacrimation, conjunctival injection, rhinorrhea, and flushing. Frequent triggers were touching the nose or a specific intraoral area. Lamotrigine and gabapentin were commonly used as initial therapy. CONCLUSIONS: Differentiating between SUNCT/SUNA does not appear to be clinically relevant. Presenting symptoms were consistent with those published, except 5/6 patients describing intraoral pain and two patients describing paresthesia.

Acute effect of sphenopalatine ganglion block with lidocaine in a patient with SUNCT.

Short-lasting unilateral neuralgiform headache with conjunctival injection and tearing/short-lasting unilateral neuralgiform headache with cranial autonomic features (SUNCT/SUNA) is a rare severe headache. At the time of an attack, it can hinder a patient from eating and requires acute intervention. The sphenopalatine ganglion is an extracranial parasympathetic ganglion with both sensory and autonomic fibers. Sphenopalatine ganglion block has long been used in the treatment of headache, particularly when conventional methods have failed. Here, we present a patient who was resistant to intravenous lidocaine, but responded rapidly to sphenopalatine ganglion block during an acute episode of SUNCT/SUNA.

The Prevalence of Trigeminal Neuralgia in Turkey: A Population-Based Study.

OBJECTIVE: Population-based studies on the prevalence of trigeminal neuralgia (TN) worldwide are rare and the epidemiology of TN in Turkey is unknown. The aim of this study is to determine the prevalence of TN in Turkey. METHODS: We conducted a cross-sectional, population-based, descriptive epidemiological study in Eregli, Turkey. Participants over the age of 18 were screened using a self-assessment form, and potential patients were identified by a 'neuroscreening team'. Suspected patients were invited for a clinical examination and evaluated by a senior neurologist. Any required imaging was carried out at a university hospital. RESULTS: Data were collected from a total of 9605 participants, after the exclusion of 247 individuals who refused to participate. Seven suspected patients were invited to a public health center for clinical evaluation. One patient was diagnosed with SUNCT (Short-lasting, Unilateral, Neuralgiform headache attacks with Conjunctival injection and Tearing) and one patient was diagnosed with post-herpetic neuralgia. A definite diagnosis of TN was confirmed in five participants. The crude prevalence was found to be 52.1/100.000. The mean age of cases was 62.2 ± 8.3 years and the female/male ratio was 4/1. TN was classified as 'symptomatic' in one patient with multiple sclerosis. The other four cases were diagnosed with classical TN. Right side involvement was identified in three cases (60%), whereas left side involvement was seen in two cases (40%). DISCUSSION: This study establishes the prevalence of TN in Turkey for the first time. The prevalence rate is low when compared with other international studies.

Headache in the Older Population: Causes, Diagnoses, and Treatments.

PURPOSE OF REVIEW: Primary headaches are less common and differ in presentation in older versus younger individuals. Secondary headaches become more common among older patients. RECENT FINDINGS: Diagnosis and management of headaches in those > 65 years are discussed. Migraine and tension-type headaches are rarely new onset in this age group and should be a diagnosis of exclusion. In older individuals, migraine is more likely to be bilateral with less sensory sensitivities. Migraine aura may present without headache; careful assessment is needed to exclude stroke. Other primary headaches discussed include cough, hypnic, and other headaches. Secondary causes discussed include giant cell arteritis, trigeminal post-herpetic neuropathy, sleep apnea, cardiac cephalgia, cervicogenic pain, vascular etiologies, medications, and burning-mouth syndrome. In older individuals, primary headaches are diagnoses of exclusion, and treatment is affected by comorbidities and polypharmacy. Secondary headaches are a major consideration requiring appropriate workup. Many treatments can safely be offered regardless of age.

A prospective comparative study and analysis of predictors of SUNA and SUNCT.

OBJECTIVE: Despite the similar phenotypes, comparison between short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) and short-lasting unilateral neuralgiform headache attacks with autonomic features (SUNA) has hitherto not been possible due to the dearth of studies validating the phenotype of SUNA. Therefore, these 2 syndromes have been kept separate in the International Classification of Headache Disorders. The aim of this study is to characterize and compare the clinical phenotypes of large clinic-based cohorts of patients with SUNA and SUNCT. METHODS: The clinical phenotype of consecutive patients with SUNA identified from a single specialist headache center in the United Kingdom between 2007 and 2012 was studied and compared to that of patients with SUNCT. RESULTS: Sixty-three patients with SUNA (18 male, 28.6%) and 70 patients with SUNCT (32 male, 35.7%) were included. The demographic and clinical characteristics of patients with SUNA were similar to those of patients with SUNCT. Ptosis and rhinorrhea were predictors of SUNCT. The corresponding odds ratios (ORs) (95% confidence interval) were 3.79 (1.64-8.77, p = 0.002) and 2.46 (1.09-5.59, p = 0.031), respectively. The presence of spontaneous only attacks was a predictor for SUNA (OR 2.58 [1.10-6.05], p = 0.029). CONCLUSION: No major clinical differences have emerged between SUNCT and SUNA, bar the fact that SUNCT is characterized by more prominent cranial autonomic features and triggerability. We propose that the 2 disorders be placed together in a single diagnostic category for which new diagnostic criteria are proposed.

The neurosurgical treatment of craniofacial pain syndromes: current surgical indications and techniques.

Craniofacial pain syndromes are comprised of multiple pathological entities resulting in pain referred to the scalp, face, or deeper cranial structures. In a small subset of patients affected by those syndromes, pharmacological and physical therapies fail in alleviating pain. In some of those refractory patients surgical procedures aimed at relieving pain are indicated and have been adopted with variable results and safety profiles. In this review, the authors describe craniofacial pain syndromes that most commonly fail to respond to pharmacological therapies and may be amenable to tailored surgical procedures. In particular, trigeminal, glossopharyngeal, and occipital neuralgias are considered, as well as some primary headache syndromes such as cluster headache, short unilateral neuralgiform headache with conjunctival injection and tearing/short unilateral neuralgiform headache with autonomic symptoms, and migraine. Surgical techniques, including the implantation of deep brain or peripheral nerve electrodes with subsequent chronic stimulation, microvascular decompression of neurovascular conflicts, and percutaneous lesioning of neural structures are described. Finally, surgical indications, outcomes, and safety of these procedures are presented.

Ketamine as a potential option in the treatment of short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing.

A number of treatment options have been used over the years in short-lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) with variable results. The most common preventive treatments include carbamazepine, lamotrigine, indomethacin, gabapentin and topiramate. Ketamine is being increasingly used in the treatment of neuropathic pain. The parentral formulations are generally used as oral preparations have poor bioavailability. Recently, ketamine lozenges have been shown to have sufficiently high bioavailability to support their use as a preventive treatment in a number of conditions causing intractable neuropathic pain. We report a 58-year-old man whose symptoms of SUNCT were not responsive to conventional preventive treatments but responded well to a subcutaneous, sub-anaesthetic ketamine infusion and subsequently, sublingual ketamine lozenges.

Espectro clínico del SUNCT y de la neuralgia trigeminal secundarios: un abordaje multidisciplinar desde urgencias / Clinical spectrum of associated SUNCT (shortlasting unilateral neuralgiform headache attacks with conjunctival injection and tearing) and trigeminal neuralgia: a multidisciplinary approach in the emergency department

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SUNCT like syndrome preceding acute ophthalmic- distribution zoster: A case report and review of the literature.

BACKGROUND: SUNCT like syndrome has been observed as a post zoster condition, as a syndrome associated with overt ophthalmic zoster after appearance of herpetic lesions and in varicella zoster virus meningoencephalitis without rash. However, SUNCT like syndrome fully consistent and congruent with the criteria of the ICHD immediately before onset of an ophthalmic-distribution zoster has not been reported. CASE PRESENTATION: We report 73-year-old patient with a SUNCT like syndrome as the first presentation of an acute ophthalmic-distribution zoster. Symptomatic treatment was highly effective, after antiviral treatment with acyclovir no further medication was required. CONCLUSIONS: SUNCT like syndrome can be the initial clinical presentation immediately preceding an acute ophthalmic-distribution zoster. This is congruent with previous observations of zoster - related SUNCT like syndromes with different temporal relationship to zoster. Zoster - related SUNCT like syndromes seem to respond well to symptomatic treatment. Clinicians should ask and look for history and signs of ophthalmic zoster in SUNCT like headaches.

Post herpes zoster SUNCT like syndrome: Insights from two case reports.

Background SUNCT like syndrome secondary to post herpes zoster infection has not been reported in literature. Case We are reporting two cases of SUNCT like syndrome secondary to post herpes zoster infection of the V1 distribution of the trigeminal nerve. Treatment with pregabalin and lamotrigine achieved complete symptomatic relief in both patients. Conclusion SUNCT like syndrome can occur after herpetic infection of the trigeminal nerve. Unlike primary SUNCT syndrome, post-herpetic SUNCT like syndrome seems to respond well to pharmacological treatment and has a good prognosis.

Therapeutical approaches to paroxysmal hemicrania, hemicrania continua and short lasting unilateral neuralgiform headache attacks: a critical appraisal.

BACKGROUND: Hemicrania continua (HC), paroxysmal hemicrania (PH) and short lasting neuralgiform headache attacks (SUNCT and SUNA) are rare syndromes with a difficult therapeutic approach. The aim of this review is to summarize all articles dealing with treatments for HC, PH, SUNCT and SUNA, comparing them in terms of effectiveness and safety. METHODS: A survey was performed using the pubmed database for documents published from the 1st January 1989 onwards. All types of articles were considered, those ones dealing with symptomatic cases and non-English written ones were excluded. RESULTS: Indomethacin is the best treatment both for HC and PH. For the acute treatment of HC, piroxicam and celecoxib have shown good results, whilst for the prolonged treatment celecoxib, topiramate and gabapentin are good options besides indomethacin. For PH the best drug besides indomethacin is piroxicam, both for acute and prolonged treatment. For SUNCT and SUNA the most effective treatments are intravenous or subcutaneous lidocaine for the acute treatment of active phases and lamotrigine for the their prevention. Other effective therapeutic options are intravenous steroids for acute treatment and topiramate for prolonged treatment. Non-pharmacological techniques have shown good results in SUNCT and SUNA but, since they have been tried on a small number of patients, the reliability of their efficacy is poor and their safety profile mostly unknown. CONCLUSIONS: Besides a great number of treatments tried, HC, PH, SUNCT and SUNA management remains difficult, according with their unknown pathogenesis and their rarity, which strongly limits the studies upon these conditions. Further studies are needed to better define the treatment of choice for these conditions.