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Frontiers in Neurology 2024Calcitonin gene-related peptide (CGRP) plays an important role in cerebral vasodilation, so here we aim to quantify the impact of CGRP monoclonal antibody (mAb) therapy...
INTRODUCTION
Calcitonin gene-related peptide (CGRP) plays an important role in cerebral vasodilation, so here we aim to quantify the impact of CGRP monoclonal antibody (mAb) therapy on cerebral hemodynamics.
METHODS
In 23 patients with chronic and episodic migraine, cerebral hemodynamic monitoring was performed (1) prior to and (2) 3-months into CGRP-mAb therapy. Transcranial Doppler monitored cerebral blood flow velocity (CBFv) in the middle cerebral artery (MCA) and posterior cerebral artery (PCA), from which cerebrovascular reactivity (CVR) and cerebral autoregulation (CA; ) were calculated.
RESULTS
CA was similar off and on treatment, in the MCA ( = 0.42) and PCA ( = 0.72). CVR was also unaffected by treatment, in the MCA ( = 0.38) and PCA ( = 0.92). CBFv and blood pressure were also unaffected. The subgroup of clinical responders (>50% reduction in migraine frequency) exhibited a small reduction in MCA-CBFv (6.0 cm/s; IQR: 1.1-12.4; = 0.007) and PCA-CBFv (8.9 cm/s; IQR: 6.9-10.3; = 0.04).
DISCUSSION
Dynamic measures of cerebrovascular physiology were preserved after 3 months of CGRP-mAb therapy, but a small reduction in CBFv was observed in patients who responded to treatment. Subgroup findings should be interpreted cautiously, but further investigation may clarify if CBFv is dependent on the degree of CGRP inhibition or may serve as a biomarker of drug sensitivity.
PubMed: 38746660
DOI: 10.3389/fneur.2024.1399792 -
Journal of Neurosciences in Rural... 2024Spontaneous intracranial hypotension (SIH) is a condition characterized by orthostatic headache associated with nausea, vomiting, tinnitus, vertigo, hypoacusis, neck...
Spontaneous intracranial hypotension (SIH) is a condition characterized by orthostatic headache associated with nausea, vomiting, tinnitus, vertigo, hypoacusis, neck pain/stiffness, and photophobia. Usual treatment includes bed rest, hydration, caffeine, analgesics, epidural blood patch, steroids, fibrin glue (N-butyl-cyanoacrylate), and surgical repair. In this series, we report two cases, who presented to us with features of SIH and were managed successfully with sphenopalatine ganglion block. This is a novel modality of management of SIH and has not been reported before.
PubMed: 38746504
DOI: 10.25259/JNRP_30_2024 -
Cureus Apr 2024Aseptic meningitis is a rare but serious complication of treatment with intravenous immunoglobulin (IVIG) and often mimics meningitis of infectious etiology which poses...
Aseptic meningitis is a rare but serious complication of treatment with intravenous immunoglobulin (IVIG) and often mimics meningitis of infectious etiology which poses a challenge for timely diagnosis. Although there are published recommendations on the management of IVIG-induced complications, there are no clear guidelines on the continuation of IVIG use after resolution of aseptic meningitis. We present a case of IVIG-induced aseptic meningitis in a patient with a history of refractory dermatomyositis who had been treated with immunosuppressive therapy and IVIG infusions for over a year. The patient developed intense head and neck pain with associated photophobia 24 hours after the most recent IVIG infusion. The patient was managed with supportive care consisting of intravenous fluids and analgesics. The patient's aseptic meningitis resolved without neurological complications. Ultimately, the patient was restarted on IVIG due to the recurrence of weakness from dermatomyositis. The patient tolerated re-initiation of IVIG without recurrence of IVIG-induced complications. This case highlights the importance of considering IVIG-induced aseptic meningitis as a differential diagnosis in evaluating patients with non-infectious meningitis even after regular IVIG infusions. This case also demonstrates that it is safe to reinitiate IVIG after the resolution of IVIG-induced aseptic meningitis.
PubMed: 38745808
DOI: 10.7759/cureus.58242 -
Case Reports in Women's Health Jun 2024NMDA-R encephalitis is an autoimmune encephalitis that is known to be associated with ovarian teratomas. Eighty to 100 % of patients initially present with...
NMDA-R encephalitis is an autoimmune encephalitis that is known to be associated with ovarian teratomas. Eighty to 100 % of patients initially present with neuropsychiatric symptoms. Early recognition and intervention are critical to management and prognosis. This case demonstrates non-specific presenting symptoms of NMDA-R encephalitis. A 32-year-old woman presented to the emergency room with headache, nausea, vomiting, and photophobia. She was discharged with probable aseptic meningitis. Eight days later, she represented with delusional thought content, perseverative speech, and bizarre behavior. Cerebrospinal fluid studies showed elevated protein and mild pleocytosis. A computed tomography scan with contrast showed a 35-mm complex cystic lesion in the right adnexa, which was resected. Confirmatory pathology showed a mature cystic teratoma. Paraneoplastic panel later resulted positive for NMDA-R encephalitis. The patient was treated with methylprednisolone, IVIG, plasmapheresis, and rituximab. The clinical course was complicated by a hypersensitivity reaction to rituximab, non-convulsive status epilepticus requiring intubation, dysphagia requiring a PEG placement, a rectal ulcer causing acute blood loss anemia requiring multiple blood transfusions, bilateral hearing loss, and a left lung pneumothorax. The patient's mood, cognition, and motor function were favorably improving 19 months after diagnosis. This case illustrates presenting signs of NMDA-R encephalitis in a young woman as headache and altered mental status followed by psychosis and epilepsy. Treatment should involve a multidisciplinary team and be individualized and escalated in patients with worsening clinical status refractory to first-line therapy. Further research is warranted to understand the optimal treatment strategy for this disease.
PubMed: 38737718
DOI: 10.1016/j.crwh.2024.e00612 -
Journal of Clinical Medicine May 2024Migraine is a prevalent episodic brain disorder known for recurrent attacks of unilateral headaches, accompanied by complaints of photophobia, phonophobia, nausea, and... (Review)
Review
Migraine is a prevalent episodic brain disorder known for recurrent attacks of unilateral headaches, accompanied by complaints of photophobia, phonophobia, nausea, and vomiting. Two main categories of migraine are migraine with aura (MA) and migraine without aura (MO). Early twin and population studies have shown a genetic basis for these disorders, and efforts have been invested since to discern the genes involved. Many techniques, including candidate-gene association studies, loci linkage studies, genome-wide association, and transcription studies, have been used for this goal. As a result, several genes were pinned with concurrent and conflicting data among studies. It is important to understand the evolution of techniques and their findings. This review provides a chronological understanding of the different techniques used from the dawn of migraine genetic investigations and the genes linked with the migraine subtypes.
PubMed: 38731230
DOI: 10.3390/jcm13092701 -
Eye & Contact Lens Jul 2024Radial keratotomy (RK) was commonly performed in the 1980s and 1990s. We aimed to clarify the current status of post-RK refractive correction and treatment. We...
Radial keratotomy (RK) was commonly performed in the 1980s and 1990s. We aimed to clarify the current status of post-RK refractive correction and treatment. We retrospectively reviewed the charts of 70 patients with a history of RK. Of the 70 patients, 44 were identified for clinical outcomes. Refractive or therapeutic intervention (rigid gas-permeable contact lens fit, spectacle prescription, corneal surgery, and use of pilocarpine hydrochloride for photophobia) was possible in 59% of patients with postoperative visual deterioration after RK; in the remaining 41%, therapeutic intervention was not possible. Rigid gas-permeable contact lens fit for corneal irregular astigmatism was the most common refractive intervention and was effective in 36% of cases in the university hospital.
Topics: Humans; Keratotomy, Radial; Retrospective Studies; Male; Female; Middle Aged; Adult; Visual Acuity; Aged; Astigmatism; Refraction, Ocular; Follow-Up Studies; Contact Lenses; Young Adult
PubMed: 38728248
DOI: 10.1097/ICL.0000000000001097 -
The Journal of Headache and Pain May 2024GABA, a key inhibitory neurotransmitter, has synaptic and extrasynaptic receptors on the postsynaptic neuron. Background GABA, which spills over from the synaptic cleft,...
BACKGROUND
GABA, a key inhibitory neurotransmitter, has synaptic and extrasynaptic receptors on the postsynaptic neuron. Background GABA, which spills over from the synaptic cleft, acts on extrasynaptic delta subunit containing GABAA receptors. The role of extrasynaptic GABAergic input in migraine is unknown. We investigated the susceptibility to valid migraine-provoking substances with clinically relevant behavioral readouts in Genetic Absence Epilepsy of Rats Strasbourg (GAERS), in which the GABAergic tonus was altered. Subsequently, we screened relevant GABAergic mechanisms in Wistar rats by pharmacological means to identify the mechanisms.
METHODS
Wistar and GAERS rats were administered nitroglycerin (10 mg/kg) or levcromakalim (1 mg/kg). Mechanical allodynia and photophobia were assessed using von Frey monofilaments and a dark-light box. Effects of GAT-1 blocker tiagabine (5 mg/kg), GABAB receptor agonist baclofen (2 mg/kg), synaptic GABAA receptor agonist diazepam (1 mg/kg), extrasynaptic GABAA receptor agonists gaboxadol (4 mg/kg), and muscimol (0.75 mg/kg), T-type calcium channel blocker ethosuximide (100 mg/kg) or synaptic GABAA receptor antagonist flumazenil (15 mg/kg) on levcromakalim-induced migraine phenotype were screened.
RESULTS
Unlike Wistar rats, GAERS exhibited no reduction in mechanical pain thresholds or light aversion following nitroglycerin or levcromakalim injection. Ethosuximide did not reverse the resistant phenotype in GAERS, excluding the role of T-type calcium channel dysfunction in this phenomenon. Tiagabine prevented levcromakalim-induced mechanical allodynia in Wistar rats, suggesting a key role in enhanced GABA spillover. Baclofen did not alleviate mechanical allodynia. Diazepam failed to mitigate levcromakalim-induced migraine phenotype. Additionally, the resistant phenotype in GAERS was not affected by flumazenil. Extrasynaptic GABAA receptor agonists gaboxadol and muscimol inhibited periorbital allodynia in Wistar rats.
CONCLUSION
Our study introduced a rat strain resistant to migraine-provoking agents and signified a critical involvement of extrasynaptic δGABAergic receptors. Extrasynaptic δ GABAA receptors, by mediating constant background inhibition on the excitability of neurons, stand as a novel drug target with a therapeutic potential in migraine.
Topics: Animals; Rats, Wistar; Migraine Disorders; Rats; Receptors, GABA-A; Male; Phenotype; Disease Models, Animal; Hyperalgesia; Epilepsy, Absence; Nitroglycerin; Photophobia
PubMed: 38724972
DOI: 10.1186/s10194-024-01777-4 -
Heliyon May 2024Medication overuse headache (MOH) is a secondary headache disorder that leads to pronounced disability and decreased quality of life. Available therapeutic options for...
BACKGROUND
Medication overuse headache (MOH) is a secondary headache disorder that leads to pronounced disability and decreased quality of life. Available therapeutic options for MOH are limited, and many are only effective in a subset of individuals. Although the existing evidence is limited, acupuncture may be an effective treatment option for MOH.
CASE PRESENTATION
A 45-year-old Chinese woman presented to the Medical Acupuncture Department of Sanming Integrated Traditional Chinese and Western Medicine Hospital on April 11, 2022. Thirty-five years ago, she had episodic migraines. The frequency increased over time, however, and for the past 10 years she has had daily headaches. These headaches were characterized by daily persistent throbbing pain on the left side of the patient's head, accompanied by photophobia, phonophobia, neck stiffness, dizziness, and fatigue. Without painkillers, the patient rated her headache intensity as 9 out of 10 on a visual analog scale (0 = no pain, 10 = intolerable pain), and reported that the headaches lasted for up to 7 days or more. With painkillers, the headaches had a reduced intensity (5 of 10), but persisted. The patient had taken 1-3.5 compound aminopyrine phenacetin tablets daily for more than 5 years. Standard conservative therapy (patient education, medication withdrawal, and behavioral intervention) for MOH had failed to improve her symptoms. Before her visit, the patient had headache and engaged in short-term medication use on 30 days per month. The total monthly headache intensity score was 90. The patient's Migraine-Specific Quality of Life Questionnaire (MSQ) score was 33 points, her Hamilton Depression Scale (HAMD) score was 24 points, and her Hamilton Anxiety Scale (HAMA) score was 20 points.
RESULTS
After 48 acupuncture sessions over 24 weeks, the patient completely discontinued short-term analgesic use and the monthly number of headache days and headache intensity score were both reduced by 96.67 % (from 30 to 1 and 90 to 3, respectively), with no adverse effect. Compared with baseline, the MSQ, HAMD, and HAMA scores improved by 45, 17, and 16 points, respectively. At 12 months, the patient's condition remained stable and her MOH had not relapsed.
CONCLUSION
In the context of the current literature and the present case, electroacupuncture shows promise for the long-term relief of chronic migraine with MOH when other treatments fail.
PubMed: 38720738
DOI: 10.1016/j.heliyon.2024.e30417 -
Journal of Research in Pharmacy Practice 2023Methanol poisoning can occur either intentionally through the consumption of methanol-containing products or accidentally through ingestion, resulting in visual...
OBJECTIVE
Methanol poisoning can occur either intentionally through the consumption of methanol-containing products or accidentally through ingestion, resulting in visual impairment. We assessed the long-term visual sequelae in patients with methanol poisoning.
METHODS
This prospective cohort study was conducted at referral centers, Khorshid and Alzahra University Hospitals, affiliated with Isfahan University of Medical Sciences, Isfahan, Iran. The study included patients hospitalized for methanol poisoning from June 22, 2018, to June 21, 2020, with follow-up extended until June 2021. Toxico-clinical and ophthalmologic examination data were collected from patients upon hospital admission, discharge, and during follow-up.
FINDINGS
Thirty-nine patients were assessed in this study. The majority of them (94.9%) were male, with an average age of 34 years. Patients who presented with reduced visual acuity (VA) upon admission subsequently showed abnormalities (in acuity and visual fields) during follow-up ( = 13). Among the patients who displayed visual field defects on admission, bilateral optic disc atrophy was observed in follow-up ( = 13). Conversely, patients who reported blurred vision, with or without photophobia upon admission, had normal results in their follow-up eye examinations. Among the 36 patients who underwent dialysis, 14 (38.9%) exhibited visual impairment during follow-up examinations. Additionally, 38 patients received sodium bicarbonate, and 14 of them (36.85%) also presented ocular abnormalities.
CONCLUSION
Patients who demonstrated VA deficits upon admission are more likely to experience long-term VA and visual field defects, as well as optic disc atrophy. Patients who solely complained of blurred vision, with or without photophobia, during admission were less likely to develop long-term visual defects.
PubMed: 38716324
DOI: 10.4103/jrpp.jrpp_80_22 -
International Journal of Surgery Case... Jun 2024Acute ophthalmic complications in burn injury patients are rare. Despite their rarity however, when they do occur, they may result in permanent visual impairment and...
INTRODUCTION
Acute ophthalmic complications in burn injury patients are rare. Despite their rarity however, when they do occur, they may result in permanent visual impairment and lifelong disability. Emphasizing the need for vigilance and prompt treatment initiation for a good outcome.
CASE PRESENTATION
A 3-year-old girl was referred to our burn unit after receiving 10 days of treatment at a peripheral hospital for scalding burn to her upper chest, face, and scalp. Remarkably, her eyelids were spared from the initial injury. Upon her third day under our care, she began displaying severe sensitivity to light, photophobia, irritability, excessive crying, and frequent itching of the eyes. Upon examination, bilateral conjunctival redness and inflammation, as well as whitish opacity of both corneas with pus in the anterior chambers were observed. Prompt consultation and treatment led to improvement of the symptoms.
DISCUSSION
This case report describes a rare case of bilateral endopthalmitis in a burn injury patient with no initial apparent injury to the eyes and emphasizes the importance of vigilance, prompt recognition of the scenario and treatment initiation. Risk factors identified in this patient included compromised immune system due to severe burn, prolonged hospitalization, IV antibiotic use and young age. Other more common risk factors associated with endopthalmitis like direct ocular injury and central line use were absent making the case unusual.
CONCLUSION
Despite their rarity severe ophthalmic complications like endopthalmitis can occur in burn injury patients even when least expected. Heightened vigilance, prompt evaluation, multidisciplinary team approach and early initiation of broad spectrum antibiotic treatment is crucial to prevent permanent visual loss and lifelong disability.
PubMed: 38714070
DOI: 10.1016/j.ijscr.2024.109700