Rejected

Central neuropathic pain is a severely disabling consequence of conditions that cause tissue damage in the central nervous system. It is often refractory to treatments commonly used for peripheral neuropathy. Scrambler therapy is an emerging noninvasive pain-modifying technique that uses transcutaneous electrical stimulation of nociceptive fibers with the intent of reorganizing maladaptive signaling pathways. It has been examined for the treatment of peripheral neuropathy with favorable safety and efficacy outcomes, but its application to central neuropathic pain has not been reported in transverse myelitis. We describe the use of Scrambler therapy in a patient with persistent central neuropathic pain due to transverse myelitis. The patient had tried multiple drugs for treatment of the pain, but they were not effective or caused adverse effects. After a course of Scrambler therapy, pain scores improved considerably more than what was reported with previous pharmacologic and nonpharmacologic interventions. This case supports further investigation of Scrambler therapy in multiple sclerosis, neuromyelitis optica spectrum disorder, and other immune-mediated disorders that damage the central nervous system.

Denervation of the lumbar zygapophyseal joints by medial branch radiofrequency neurotomy has shown some benefit in treating chronic low-back pain. Before denervation, a diagnosis is made by one or more blinded injections on separate occasions to ascertain whether the relevant joints are contributing to the pain. Placebo injections have been advocated in a diagnostic regime that also includes local anaesthesia, with a decision to proceed to neurotomy based on response to local anaesthesia and not to placebo.

The enormous advancements in the medical imaging methods witnessed in the past decades have allowed clinical researchers to study the function of the human brain in vivo, both in health and disease. In addition, a better understanding of brain responses to different modalities of stimuli such as pain, reward, or the administration of active or placebo interventions has been achieved through neuroimaging methods. Although magnetic resonance imaging has provided important information regarding structural, hemodynamic, and metabolic changes in the central nervous system related to pain, magnetic resonance imaging does not address modulatory pain systems at the molecular level (eg, endogenous opioid). Such important information has been obtained through positron emission tomography, bringing insights into the neuroplastic changes that occur in the context of the pain experience. Positron emission tomography studies have not only confirmed the brain structures involved in pain processing and modulation but also have helped elucidate the neural mechanisms that underlie healthy and pathological pain regulation. These data have shown some of the biological basis of the interindividual variability in pain perception and regulation. In addition, they provide crucial information to the mechanisms that drive placebo and nocebo effects, as well as represent an important source of variability in clinical trials. Positron emission tomography studies have also permitted exploration of the dynamic interaction between behavior and genetic factors and between different pain modulatory systems. This narrative review will present a summary of the main findings of the positron emission tomography studies that evaluated the functioning of the opioidergic system in the context of pain.

Influenza season is expected between October and February in the northern hemisphere, including Mexico. Previous studies suggested that transmission peak may occur earlier in Yucatan, a state in southeast Mexico.

Known since the 19th century, neuromyelitis optica (NMO), or Devic's disease, is an idiopathic immune-mediated inflammatory demyelinating disease of the central nervous system selectively affecting the optic nerve and spinal cord. Commonly diagnosed in demyelinating diseases reference centers, we report an 18-year-old female patient who sought medical attention with a 3-month history of weight loss, headache, and vomiting, followed by diplopia, a burning sensation over the lower limbs, and difficulty walking. A few days prior to hospital admission, the muscle strength in her lower limbs became worse and ascended to the upper limbs associated with sensory changes in the trunk and voiding dysfunction. At admission, the neurological examination was consistent with a spinal cord syndrome. After few days of hospitalization, she was tetraplegic with severe signs of brainstem involvement requiring mechanical ventilatory support. Intravenous methylprednisolone and cyclophosphamide were promptly started after ruling out the diagnosis of infectious disease and cord compression. Due to no substantial early improvement, intravenous immunoglobulin was also used. From then on, the neurological status gradually improved. Magnetic resonance imaging showed extensive demyelinating features in the spinal cord, and the serum IgG autoantibody was negative. The patient was referred to a tertiary neurological reference center where she remains under treatment.

To capture evidence of the efficacy and safety of pharmacological analgesia for uncomplicated acute sickle-cell pain in pediatric patients compared to placebo.

Complications following tibial intramedullary nailing include anterior knee pain, malunion, nonunion, and symptomatic/prominent interlocking screws. We report a case of a posterior tibial tendon tear caused by placement of a distal interlocking screw which was detected via dynamic ultrasound. This is a rare and possibly underreported complication which could be the cause of persistent medial sided ankle pain following locked tibial nail placement.

To investigate the current dosing regimens of gabapentinoids in Pakistani patients with neuropathic pain and to compare their clinical efficacy and tolerability in terms of pain relief and adverse effects using difference in pain score as a treatment outcome.

There are few data in the literature characterizing the pattern of analgesic use in Latin American countries, including Brazil. Little is known about the undertreatment of pain and its influence on the habit of self-medication with analgesics. The aim of this study is to define the pattern of analgesic use among chronic pain patients and its potential association with self-medication with analgesics.

Lower back pain is one of the leading causes of disability in the world. The aim of this study was to evaluate the effect of supplementation of dexmedetomidine and neostigmine with lidocaine 1.5% and triamcinolone for epidural block in increasing the duration of analgesia among patients suffering from chronic low back pain. In this double-blind, randomized clinical trial, 33 patients with chronic low back pain were included in three groups of 11 patients for epidural blockage. Triamcinolone (40 mg/ml) was added to lidocaine 1.5% solution (2 cc/segment) for all three groups. In group N, neostigmine was used at a dose of 1 mg (mg), followed by group D (dexmedetomidine 35 μg [0.5 μg/kg]), and grou [ND (neostigmine 0.5 mg, and 35 μg dexmedetomidine, all of which were added to the triamcinolone and lidocaine solution in each group. Medications were injected into the epidural space using an interlaminar approach. Subsequently, scores of pain and duration of analgesia were recorded in questionnaires and analysed using SPSS version 23. One month after the injections, pain scores recorded in the N group were 7.6±1.4, followed by 5.88±1.2 in group D and 5.42 ±1.1 in group ND. Therefore, the pain scores were significantly higher in the neostigmine group than the other two groups (p = 0.02), but no significant difference was found between the two groups that received dexmedetomidine and a combination of dexmedetomidine + neostigmine. Three months after the injections, there was a significant difference in pain scores between the two groups (P = 0.01). Both neostigmine and dexmedetomidine were capable of reducing the pain of patients with chronic low back pain after epidural block. However, neostigmine's impact is lower compared to dexmedetomidine. The combination of the two drugs also reduced the pain scores of the patients after the intervention.