Los trastornos primarios de la presión intracraneal incluyen la hipertensión intracraneal idiopática y la hipotensión intracraneal espontánea. El diagnóstico y tratamiento de ambas entidades ha presentado un avance destacable en los últimos años, por lo que desde el Grupo de Estudio de Cefaleas de la Sociedad Española de Neurología consideramos necesaria la elaboración de este documento de consenso con la inclusión de algoritmos diagnósticos y terapéuticos para mejorar su manejo en la práctica diaria.Este documento ha sido redactado por un comité de expertos del Grupo de Estudio de Cefaleas de la Sociedad Española de Neurología tras realizar una revisión sistemática de la bibliografía, incorporando la experiencia de los participantes y estableciendo unas recomendaciones prácticas con niveles de evidencia y grados de recomendación.

INTRODUCTION:The COVID-19 pandemic has caused an unexpected boost to telemedicine. We analyse the impact of the pandemic on telemedicine applied in Spanish headache consultations, review the literature, and issue recommendations for the implementation of telemedicine in consultations.METHOD:The study comprised 3 phases: 1) review of the MEDLINE database since 1958 (first reported experience with telemedicine); 2) Google Forms survey sent to all members of the Spanish Society of Neurology's Headache Study Group (GECSEN); and 3) online consensus of GECSEN experts to issue recommendations for the implementation of telemedicine in Spain.RESULTS:COVID-19 has increased waiting times for face-to-face consultations, increasing the use of all telemedicine modalities: landline telephone (from 75% before April 2020 to 97% after), mobile telephone (from 9% to 27%), e-mail (from 30% to 36%), and video consultation (from 3% to 21%). Neurologists are aware of the need to expand the availability of video consultations, which are clearly growing, and other e-health and m-health tools.CONCLUSIONS:The GECSEN recommends and encourages all neurologists who assist patients with headaches to implement telemedicine resources, with the optimal objective of offering video consultation to patients under 60-65 years of age and telephone calls to older patients, although each case must be considered on an individual basis. Prior approval and advice must be sought from legal and IT services and the centre's management. Most patients with stable headache and/or neuralgia are eligible for telemedicine follow-up, after a first consultation that must always be held in person.

Resumen: Introducción: La neuralgia del trigémino (NT) es un tipo de dolor neuropático que afecta a una o más ramas del nervio trigémino. Aunque su prevalencia poblacional es relativamente baja, la NT supone un problema muy importante tanto en las consultas de neurología como en las urgencias por la dificultad para el diagnóstico y el tratamiento y el elevado impacto sobre la calidad de vida de las personas que la padecen. Por estos motivos, el Grupo de Estudio de Cefaleas de la Sociedad Española de Neurología ha elaborado un documento de consenso sobre el manejo de esta patología. Desarrollo: Este documento ha sido redactado por un comité de expertos utilizando la nomenclatura de la clasificación de la International Headache Society (IHS), analizando la evidencia científica publicada sobre diagnóstico y tratamiento y estableciendo unas recomendaciones prácticas con niveles de evidencia. Conclusiones: El diagnóstico de la NT es clínico. La International Classification of Headache Disorders en su tercera edición (ICHD-3) clasifica el dolor atribuible a una lesión o enfermedad del nervio trigémino en NT y neuropatía trigeminal dolorosa. A su vez, la NT puede dividirse en tres tipos principales según la etiología del dolor: clásica, idiopática y secundaria. Es recomendable la realización de una resonancia magnética (RM) craneal a todo paciente con diagnóstico clínico de NT para descartar causas secundarias. Para estudiar la presencia de una compresión neurovascular con RM se recomienda la aplicación de los protocolos de imagen FIESTA, DRIVE o CISS. El tratamiento inicialmente será farmacológico. En pacientes seleccionados con respuesta insuficiente o mala tolerancia a fármacos se debe valorar el tratamiento quirúrgico. Abstract: Introduction: Trigeminal neuralgia (TN) is a chronic neuropathic pain disorder affecting one or more branches of the trigeminal nerve. Despite its relatively low global prevalence, TN is an important healthcare problem both in neurology departments and in emergency departments due to the difficulty of diagnosing and treating the condition and its significant impact on patients’ quality of life. For all these reasons, the Spanish Society of Neurology's Headache Study Group has developed a consensus statement on the management of TN. Development: This document was drafted by a panel of neurologists specialising in headache, who used the terminology of the International Headache Society. We analysed the published scientific evidence on the diagnosis and treatment of TN and establish practical recommendations with levels of evidence. Conclusions: The diagnosis of TN is based on clinical criteria. Pain attributed to a lesion or disease of the trigeminal nerve is divided into TN and painful trigeminal neuropathy, according to the International Classification of Headache Disorders, third edition. TN is further subclassified into classical, secondary, or idiopathic, according to aetiology. Brain MRI is recommended in patients with clinical diagnosis of TN, in order to rule out secondary causes. In MRI studies to detect neurovascular compression, FIESTA, DRIVE, or CISS sequences are recommended. Pharmacological treatment is the initial choice in all patients. In selected cases with drug-resistant pain or poor tolerance, surgery should be considered.

INTRODUCTION:Trigeminal neuralgia (TN) is a chronic neuropathic pain disorder affecting one or more branches of the trigeminal nerve. Despite its relatively low global prevalence, TN is an important healthcare problem both in neurology departments and in emergency departments due to the difficulty of diagnosing and treating the condition and its significant impact on patients' quality of life. For all these reasons, the Spanish Society of Neurology's Headache Study Group has developed a consensus statement on the management of TN. DEVELOPMENT:This document was drafted by a panel of neurologists specialising in headache, who used the terminology of the International Headache Society. We analysed the published scientific evidence on the diagnosis and treatment of TN and establish practical recommendations with levels of evidence. CONCLUSIONS:The diagnosis of TN is based on clinical criteria. Pain attributed to a lesion or disease of the trigeminal nerve is divided into TN and painful trigeminal neuropathy, according to the International Classification of Headache Disorders, third edition. TN is further subclassified into classical, secondary, or idiopathic, according to aetiology. Brain MRI is recommended in patients with clinical diagnosis of TN, in order to rule out secondary causes. In MRI studies to detect neurovascular compression, FIESTA, DRIVE, or CISS sequences are recommended. Pharmacological treatment is the initial choice in all patients. In selected cases with drug-resistant pain or poor tolerance, surgery should be considered.

Resumen: Introducción: En los últimos años se ha observado que moléculas como el péptido relacionado con el gen de la calcitonina (CGRP) y, en menor grado, el péptido activador de la adenilato-ciclasa pituitaria estaban elevadas durante los ataques de migraña y en la migraña crónica tanto en líquido cefalorraquídeo como en suero y que su reducción farmacológica tenía una significación clínica con una mejoría en la migraña de los pacientes. Es lógico por tanto que una de las principales líneas de investigación en migraña se base en el papel del CGRP en la fisiopatología de esta entidad. Desarrollo: Desde el Grupo de Estudio de Cefaleas de la Sociedad Española de Neurología nos planteamos la redacción de este documento, cuyo objetivo es abordar, basándonos en la evidencia publicada, cuestiones tan importantes como el papel del CGRP en la fisiopatología de la migraña, el mecanismo de acción de los anticuerpos monoclonales y de los gepantes, el análisis crítico de los resultados de los diferentes estudios, el perfil del paciente que podría ser candidato al tratamiento con anticuerpos monoclonales y su impacto en términos de farmacoeconomía. Conclusiones: El desarrollo clínico de los gepantes, antagonistas del CGRP, para el tratamiento agudo del ataque de migraña y de los anticuerpos monoclonales contra ligando y contra el receptor del CGRP ofrecen resultados esperanzadores para nuestros pacientes. Abstract: Introduction: It has been observed in recent years that levels of such molecules as calcitonin gene–related peptide (CGRP) and, to a lesser extent, the pituitary adenylate cyclase–activating peptide are elevated during migraine attacks and in chronic migraine, both in the cerebrospinal fluid and in the serum. Pharmacological reduction of these proteins is clinically significant, with an improvement in patients’ migraines. It therefore seems logical that one of the main lines of migraine research should be based on the role of CGRP in the pathophysiology of this entity. Development: The Spanish Society of Neurology's Headache Study Group decided to draft this document in order to address the evidence on such important issues as the role of CGRP in the pathophysiology of migraine and the mechanism of action of monoclonal antibodies and gepants; and to critically analyse the results of different studies and the profile of patients eligible for treatment with monoclonal antibodies, and the impact in terms of pharmacoeconomics. Conclusions: The clinical development of gepants, which are CGRP antagonists, for the acute treatment of migraine attacks, and CGRP ligand and receptor monoclonal antibodies offer promising results for these patients.

BACKGROUND AND PURPOSE:Several variables have been reported to be associated with anti-calcitonin gene-related peptide (CGRP) receptor or ligand antibody response, but with differing results. Our objective was to determine whether machine-learning (ML)-based models can predict 6-, 9- and 12-month responses to anti-CGRP receptor or ligand therapies among migraine patients.METHODS:We performed a multicenter analysis of prospectively collected data from patients with migraine receiving anti-CGRP therapies. Demographic and clinical variables were collected. Response rates in the 30% to 50% range, or at least 30%, in the 50% to 75% range, or at least 50%, and response rate of at least 75% regarding the reduction in the number of headache days per month at 6, 9 and 12 months were calculated. A sequential forward feature selector was used for variable selection and ML-based predictive models for the response to anti-CGRP therapies at 6, 9 and 12 months, with model accuracy not less than 70%, were generated.RESULTS:A total of 712 patients were included, 93% were women, and the mean (SD) age was 48 (11.6) years. Eighty-four percent of patients had chronic migraine. ML-based models using headache days/month, migraine days/month and the Headache Impact Test (HIT-6) yielded predictions with an F1 score range of 0.70-0.97 and an area under the receiver-operating curve score range of 0.87-0.98. SHAP (SHapley Additive exPlanations) summary plots and dependence plots were generated to evaluate the relevance of the factors associated with the prediction of the above-mentioned response rates.CONCLUSIONS:Our results show that ML models can predict anti-CGRP response at 6, 9 and 12 months. This study provides a predictive tool that can be used in a real-world setting.

Introduction: Medication overuse headache is a secondary headache in which the regular or frequent use of analgesics can increase the frequency of the episodes, causing the transition from episodic to chronic headache. The prevalence of medication overuse headache is approximately 1-2%, with higher rates among women aged 30-50 years and with comorbid psychiatric disorders such as depression or anxiety, or other chronic pain disorders. It is important to be familiar with the management of this disease. To this end, the Spanish Society of Neurology's Headache Study Group has prepared a consensus document addressing this disorder. Development: These guidelines were prepared by a group of neurologists specialising in headache after a systematic literature review and provides consensus recommendations on the proper management and treatment of medication overuse headache. The treatment of medication overuse headache is often complex, and is based on 4 fundamental pillars: education and information about the condition, preventive treatment, discontinuation of the drug being overused, and treatment for withdrawal symptoms. Follow-up of patients at risk of recurrence is important. Conclusions: We hope that this document will be useful in daily clinical practice and that it will update and improve understanding of medication overuse headache management. (C) 2020 Sociedad Espanola de Neurologia. Published by Elsevier Espana, S.L.U.

Introduction: Numerous invasive and non-invasive neuromodulation devices have been developed and applied to patients with headache and neuralgia in recent years. However, no updated review addresses their safety and efficacy, and no healthcare institution has issued specific recommendations on their use for these 2 conditions. Methods: Neurologists from the Spanish Society of Neurology's (SEN) Headache Study Group and neurosurgeons specialising in functional neurosurgery, selected by the Spanish Society of Neurosurgery (SENEC), performed a comprehensive review of articles on the MEDLI NE database addressing the use of the technique in patients with headache and neuralgia. Results: We present an updated review and establish the first set of consensus recommendations of the SEN and SENC on the use of neuromodulation to treat headache and neuralgia, analysing the current levels of evidence on its effectiveness for each specific condition. Conclusions: Current evidence supports the indication of neuromodulation techniques for patients with refractory headache and neuralgia (especially migraine, cluster headache, and trigeminal neuralgia) selected by neurologists and headache specialists, after pharmacological treatment options are exhausted. Furthermore, we recommend that invasive neuromodulation be debated by multidisciplinary committees, and that the procedure be performed by teams of neurosurgeons specialising in functional neurosurgery, with acceptable rates of morbidity and mortality. (C) 2020 Sociedad Espanola de Neurologia. Published by Elsevier Espana, S.L.U.

Resumen: Introducción: La pandemia COVID-19 ha provocado un inusitado impulso a la telemedicina (TM). Analizamos el impacto de la pandemia en la TM aplicada en las consultas de cefaleas españolas, revisamos la literatura y lanzamos unas recomendaciones para implantar la TM en las consultas. Método: Tres fases: 1) Revisión de la base Medline desde el año 1958 (primera experiencia de TM); 2) Formulario Google Forms enviado a todos los neurólogos del Grupo de Estudio de Cefaleas de la Sociedad Española de Neurología (GECSEN), y 3) Consenso on-line de expertos GECSEN para emitir recomendaciones para implantar la TM en España. Resultados: La pandemia por COVID-19 ha empeorado los tiempos de espera presenciales, incrementando el uso de todas las modalidades de TM antes y después de abril de 2020: teléfono fijo (del 75% al 97%), teléfono móvil (del 9% al 27%), correo electrónico (del 30% al 36%) y videoconsulta (del 3% al 21%). Los neurólogos son conscientes de la necesidad de ampliar la oferta con videoconsultas, claramente in crescendo, y otras herramientas de e-health y m-health. Conclusiones: Desde el GECSEN recomendamos y animamos a todos los neurólogos que asisten a pacientes con cefaleas a implantar recursos de TM, teniendo como objetivo óptimo la videoconsulta en menores de 60-65 años y la llamada telefónica en mayores, si bien cada caso debe individualizarse. Se deberá contar previamente con la aprobación y asesoramiento de los servicios jurídicos e informáticos y de la dirección del centro. La mayoría de los pacientes con cefalea y/o neuralgia estable son candidatos a seguimiento mediante TM, tras una primera visita que tiene que ser siempre presencial. Abstract: Introduction: The COVID-19 pandemic has caused an unexpected boost to telemedicine. We analyse the impact of the pandemic on telemedicine applied in Spanish headache consultations, review the literature, and issue recommendations for the implementation of telemedicine in consultations. Method: The study comprised 3 phases: 1) review of the MEDLINE database since 1958 (first reported experience with telemedicine); 2) Google Forms survey sent to all members of the Spanish Society of Neurology's Headache Study Group (GECSEN); and 3) online consensus of GECSEN experts to issue recommendations for the implementation of telemedicine in Spain. Results: COVID-19 has increased waiting times for face-to-face consultations, increasing the use of all telemedicine modalities: landline telephone (from 75% before April 2020 to 97% after), mobile telephone (from 9% to 27%), e-mail (from 30% to 36%), and video consultation (from 3% to 21%). Neurologists are aware of the need to expand the availability of video consultations, which are clearly growing, and other e-health and m-health tools. Conclusions: The GECSEN recommends and encourages all neurologists who assist patients with headaches to implement telemedicine resources, with the optimal objective of offering video consultation to patients under 60-65 years of age and telephone calls to older patients, although each case must be considered on an individual basis. Prior approval and advice must be sought from legal and IT services and the centre's management. Most patients with stable headache and/or neuralgia are eligible for telemedicine follow-up, after a first consultation that must always be held in person.

Resumen: Introducción: La cefalea con uso excesivo de medicación es una cefalea secundaria en la que el uso regular o frecuente de medicación analgésica produce un aumento de la frecuencia de una cefalea de base, pasando de episódica a crónica. La prevalencia de esta entidad está en torno al 1-2%, siendo más frecuente en mujeres entre 30 y 50 años con comorbilidades psiquiátricas como depresión o ansiedad y otros procesos de dolor crónico. Es importante conocer el manejo de esta entidad. Por este motivo, el Grupo de Estudios de Cefaleas de la Sociedad Española de Neurología ha pretendido realizar este documento de consenso sobre esta patología. Desarrollo: Esta guía ha sido redactada por un grupo de expertos a partir de la revisión de la evidencia científica publicada y estableciendo recomendaciones prácticas para su adecuado manejo y tratamiento. El tratamiento de la cefalea con uso excesivo de medicación tiene varios pilares fundamentales y suele ser complejo: información y educación sobre el desarrollo de la cefalea con uso excesivo de medicación, tratamiento preventivo, suspensión del fármaco de uso frecuente y tratamiento de deshabituación. Es importante el seguimiento de pacientes con riesgo de recurrencias. Conclusiones: Esperamos que este documento resulte de utilidad y permita su aplicación práctica en la consulta diaria y que sirva para actualizar y mejorar el conocimiento del manejo de esta patología. Abstract: Introduction: Medication overuse headache is a secondary headache in which the regular or frequent use of analgesics can increase the frequency of the episodes, causing the transition from episodic to chronic headache. The prevalence of medication overuse headache is approximately 1-2%, with higher rates among women aged 30-50 years and with comorbid psychiatric disorders such as depression or anxiety, or other chronic pain disorders. It is important to be familiar with the management of this disease. To this end, the Spanish Society of Neurology's Headache Study Group has prepared a consensus document addressing this disorder. Development: These guidelines were prepared by a group of neurologists specialising in headache after a systematic literature review and provides consensus recommendations on the proper management and treatment of medication overuse headache. The treatment of medication overuse headache is often complex, and is based on 4 fundamental pillars: education and information about the condition, preventive treatment, discontinuation of the drug being overused, and treatment for withdrawal symptoms. Follow-up of patients at risk of recurrence is important. Conclusions: We hope that this document will be useful in daily clinical practice and that it will update and improve understanding of medication overuse headache management.

Resumen: Introducción: En los últimos meses han surgido dudas por parte de pacientes, médicos de familia y neurólogos sobre la posibilidad de que algunos de los fármacos que habitualmente se utilizan en cefaleas y neuralgias puedan facilitar o complicar la infección por el SARS-CoV-2. Material y métodos: Hemos recabado información sobre el posicionamiento de sociedades científicas, así como de las distintas Agencias de Medicamentos (americana, europea y española) para poder esclarecer dudas respecto al uso de fármacos como lisinopril, candesartán, ibuprofeno, corticoides, carbamazepina, anticuerpos monoclonales contra el péptido relacionado con el gen de la calcitonina (CGRP) durante la pandemia por COVID-19. Resultados: Planteamos recomendaciones acerca del uso de fármacos habituales en el tratamiento de las cefaleas en el contexto de la pandemia por COVID-19, basándonos en las evidencias de las que disponemos en el momento actual. Conclusiones: Actualmente no existe ningún argumento científico robusto para contraindicar formalmente ninguno de los tratamientos que se emplean en cefaleas y neuralgias. Abstract: Introduction: In recent months, doubts have arisen among patients, general practitioners, and neurologists as to whether some drugs commonly used in patients with headaches and neuralgia may favour or complicate the disease caused by SARS-CoV-2. Material and methods: We collected information on the opinions of scientific societies and medicines agencies (American, European, and Spanish) to clarify doubts regarding the use of drugs such as lisinopril, candesartan, ibuprofen, corticosteroids, carbamazepine, and monoclonal antibodies targeting the calcitonin gene–related peptide in the context of the COVID-19 pandemic. Results: We make recommendations about the use of standard headache treatments in the context of the COVID-19 pandemic, based on the current scientific evidence. Conclusions: At present, there is no robust scientific argument to formally contraindicate any of the standard treatments employed for headaches and neuralgias.

Resumen: Introducción: La infección por SARS-CoV-2 ha tenido un enorme impacto en los sistemas sanitarios. España, donde la cefalea constituye el motivo principal de consulta ambulatoria en Neurología, es uno de los países con más casos notificados. Objetivo: Conocer el impacto de la pandemia COVID-19 en las Unidades de Cefaleas en España y evaluar cómo imaginan el futuro de estas estructuras los neurólogos responsables. Métodos: Estudio transversal mediante encuesta online distribuida a los responsables de las Unidades, realizada durante la sexta semana del estado de alarma. Resultados: La tasa de respuesta fue del 74%, con participación de centros de diferentes características y de todas las Comunidades Autónomas. El 95,8% describió limitaciones en la actividad presencial, un 60,4% mantuvo la consulta presencial preferente y el 45,8% los procedimientos urgentes. En el 91,7% de los centros la actividad presencial cancelada se sustituyó por consulta telefónica. El 95,8% de los encuestados afirmó que empleará material de protección personal en el futuro y el 86% pretende incorporar en mayor medida la telemedicina. La mayoría prevé un incremento en las listas de espera (93,8% en primeras visitas, 89,6% en revisiones y 89,4% en procedimientos) y una peor situación clínica de los pacientes, pero solo un 15% cree que su estructura asistencial se verá debilitada. Conclusiones: Como consecuencia de la pandemia, la actividad asistencial e investigadora en cefaleas se ha reducido de manera notable. Esto pone de manifiesto la necesidad de un incremento de la oferta de telemedicina en nuestros centros en un futuro cercano. Abstract: Introduction: The COVID-19 pandemic has had a great impact on healthcare systems. Spain, where headache is the main reason for outpatient neurology consultation, is one of the countries with the most reported cases of the disease. Objective: This study aimed to analyse the impact of the COVID-19 pandemic on headache units in Spain and to evaluate how neurologists see the future of these units. Methods: We conducted a cross-sectional online survey of headache units during the sixth week of the state of alarm declared in Spain in response to the pandemic. Results: The response rate was 74%, with the participation of centres with different characteristics and from all Autonomous Communities of Spain. Limitations in face-to-face activity were reported by 95.8% of centres, with preferential face-to-face consultation being maintained in 60.4%, and urgent procedures in 45.8%. In 91.7% of centres, the cancelled face-to-face activity was replaced by telephone consultation. 95.8% of respondents stated that they would use personal protection equipment in the future, and 86% intended to increase the use of telemedicine. The majority foresaw an increase in waiting lists (93.8% for initial consultations, 89.6% for follow-up, and 89.4% for procedures) and a worse clinical situation for patients, but only 15% believed that their healthcare structures would be negatively affected in the future. Conclusions: As a consequence of the pandemic, headache care and research activity has reduced considerably. This demonstrates the need for an increase in the availability of telemedicine in our centres in the near future.

INTRODUCTION:In recent months, doubts have arisen among patients, general practitioners, and neurologists as to whether some drugs commonly used in patients with headaches and neuralgia may favour or complicate the disease caused by SARS-CoV-2.MATERIAL AND METHODS:We collected information on the opinions of scientific societies and medicines agencies (American, European, and Spanish) to clarify doubts regarding the use of drugs such as lisinopril, candesartan, ibuprofen, corticosteroids, carbamazepine, and monoclonal antibodies targeting the calcitonin gene-related peptide in the context of the COVID-19 pandemic.RESULTS:We make recommendations about the use of standard headache treatments in the context of the COVID-19 pandemic, based on the current scientific evidence.CONCLUSIONS:At present, there is no robust scientific argument to formally contraindicate any of the standard treatments employed for headaches and neuralgias.