Non-invasive therapeutic brain stimulation for treatment of resistant focal epilepsy in a teenager.

AIMS: A 13-year-old boy with symptomatic focal epilepsy due to a right parietal dysembryoplastic neuroepithelial tumor (DNET) presented pre- and post-operatively fluctuating tinnitus and sensory symptoms which became persistent after incomplete tumor resection. He received low-frequency rTMS treatment and cathodal tDCS treatment. METHODS: Case report with clinical details and pictures from rTMS and tDCS stimulation targets. RESULTS: The patient became symptom free with an initial low-frequency rTMS treatment series targeted to the EEG-verified epileptic zone followed by maintenance therapy at the same region with cathodal tDCS at home. CONCLUSIONS: Both rTMS and tDCS could be more often used in adolescents when drug treatment and surgery do not cease focal epilepsy, here with fluctuating tinnitus.

Evidence-based guidelines on the therapeutic use of repetitive transcranial magnetic stimulation (rTMS): An update (2014-2018).

A group of European experts reappraised the guidelines on the therapeutic efficacy of repetitive transcranial magnetic stimulation (rTMS) previously published in 2014 [Lefaucheur et al., Clin Neurophysiol 2014;125:2150-206]. These updated recommendations take into account all rTMS publications, including data prior to 2014, as well as currently reviewed literature until the end of 2018. Level A evidence (definite efficacy) was reached for: high-frequency (HF) rTMS of the primary motor cortex (M1) contralateral to the painful side for neuropathic pain; HF-rTMS of the left dorsolateral prefrontal cortex (DLPFC) using a figure-of-8 or a H1-coil for depression; low-frequency (LF) rTMS of contralesional M1 for hand motor recovery in the post-acute stage of stroke. Level B evidence (probable efficacy) was reached for: HF-rTMS of the left M1 or DLPFC for improving quality of life or pain, respectively, in fibromyalgia; HF-rTMS of bilateral M1 regions or the left DLPFC for improving motor impairment or depression, respectively, in Parkinson's disease; HF-rTMS of ipsilesional M1 for promoting motor recovery at the post-acute stage of stroke; intermittent theta burst stimulation targeted to the leg motor cortex for lower limb spasticity in multiple sclerosis; HF-rTMS of the right DLPFC in posttraumatic stress disorder; LF-rTMS of the right inferior frontal gyrus in chronic post-stroke non-fluent aphasia; LF-rTMS of the right DLPFC in depression; and bihemispheric stimulation of the DLPFC combining right-sided LF-rTMS (or continuous theta burst stimulation) and left-sided HF-rTMS (or intermittent theta burst stimulation) in depression. Level A/B evidence is not reached concerning efficacy of rTMS in any other condition. The current recommendations are based on the differences reached in therapeutic efficacy of real vs. sham rTMS protocols, replicated in a sufficient number of independent studies. This does not mean that the benefit produced by rTMS inevitably reaches a level of clinical relevance.

How to Assess Sensory Recovery After Breast Reconstruction Surgery?

BACKGROUND: We evaluated clinical against psychophysical (tactile and thermal quantitative sensory test [QST]), neurophysiologic (somatosensory evoked potential [SEP]), and epithelial nerve fiber density (ENFD) examinations in detection and follow-up of sensory alterations after breast reconstruction done with or without nerve anastomoses. PATIENTS AND METHODS: In a prospective 2-year follow-up design, 56 breast cancer patients underwent innervated and 20 patients noninnervated free rectus abdominis muscle-sparing flap (ms-TRAM) breast reconstruction. Healthy contralateral breasts (36 patients) and 20 healthy volunteer women served as control participants. The diagnostic values of clinical examination, QST, SEP, and ENFD tests were assessed at baseline, and 1 and 2 years postoperatively. RESULTS: Sensation of mastectomized thoracic skin was impaired before reconstruction surgery, confirmed with QST (P < .001 for tactile, warm and cool detection; others not significant). All tests were further impaired at 1 year (P < .012-.0001), but mostly showed improvement during subsequent follow-up (P < .001-.0001), except for vibration and 2-point discrimination, ENFD, and SEP. QST improved diagnostic accuracy for large as well as small fiber function performing best in assessing sensory recovery at 2 years. Of clinical tests, sharp-blunt discrimination was modestly useful (sensitivity, 0.85; poor specificity, 0.17). Two-point and vibration discrimination tests had poor diagnostic values. SEP recording was modestly sensitive (0.50), but not specific (0.25). Because of sparse epithelial innervation already at baseline, ENFD performed poorly. CONCLUSION: Most tests could identify sensory nerve damage postoperatively. Tactile and thermal QST were most reliable, and sensitive also in confirming sensory recovery. SEP recording was useful especially in differentiating surgical techniques, whereas ENFD and clinical examination performed poorly, with the exception of sharp-blunt discrimination.

Improved sensory recovery with a novel dual neurorrhaphy technique for breast reconstruction with free muscle sparing TRAM flap technique.

BACKGROUND: We describe a new dual neurorrhaphy method for a free abdominal-based flap and compare sensory recovery with this novel technique to that with conventional neurorrhaphy technique for breast reconstruction. METHODS: 70 breast cancer patients underwent muscle sparing innervated transversal rectus abdominis myocutaneous flap (neuro ms-TRAM) breast reconstruction with either a novel dual neurorrhaphy technique (N = 41) or single (N = 29) neurorrhaphy only. Dual neurorrhaphy was performed on both sides and single neurorrhaphy on one side of the flap, using the end-to-end or end-to-side technique. Two years postoperatively, quantitative sensory testing (QST) was performed for tactile, and thermal sensory modalities, and other tests included sharp-blunt, vibration, and two-point discrimination. Sensory modalities were scored either zero (abnormal) or one point (normal) at each test site against normal reference values (five sites for most tests). The total sensory scores (TSC) were calculated on the basis of the sums of the individual test scores, and all data are presented as the median (interquartile range, IQR). RESULTS: The median of TSC in the breast reconstruction with the dual neurorrhaphy was higher (15.3, IQR 11.8-19.4), than that with the single neurorrhaphy (11.5, IQR 9.1-17.4) (P = 0.037). Regarding the different sensory modalities, the dual technique especially enhanced the tactile (P = 0.005) and cool detection (P = 0.021) recovery compared to the single neurorrhaphy. CONCLUSIONS: Dual neurorrhaphy improved the sensory recovery of the reconstructed breast, and may therefore be recommended for clinical practice. © 2014 Wiley Periodicals, Inc. Microsurgery 37:21-28, 2017.

A microneurovascular TRAM flap does not compromise abdominal sensibility more than a conventional one.

BACKGROUND: Classic abdominoplasty for a transverse rectus abdominis musculocutaneous (TRAM) flap breast reconstruction impairs abdominal somatosensory function at the donor site. The aim of this study was to investigate whether the type of surgical procedure has an effect on somatosensory alterations of abdominal skin after TRAM flap breast reconstruction. METHODS: Sixty patients (mean ± SD age, 50 ± 6.0 years) who underwent microvascular TRAM flap breast reconstruction and 20 healthy subjects (control group; mean age, 46 ± 6.7 years) participated in the study. Twenty patients had bilateral-nerve anastomosis, 20 had single-nerve anastomosis, and 20 underwent no nerve dissection for the TRAM flap. Clinical sensory examination and tactile and thermal quantitative sensory testing were performed and a patient questionnaire was administered at a mean of 2 to 4.5 years after surgery. RESULTS: All surgical techniques produced significant sensory impairment below the umbilicus, but there were no significant differences in total sensibility scores between the groups with single-nerve (mean sensibility score, 21.98 ± 2.7) and double-nerve (mean sensibility score, 20.71 ± 3.6) anastomosis of the TRAM flap. The best sensibility scores were found in the group with single-nerve dissection. Fifteen percent of patients complained of mild pain, and 13 percent felt occasional tactile hyperesthesia in their abdominal skin, mostly around the umbilicus and scars. CONCLUSIONS: In this study, unilateral or bilateral nerve dissection when preparing and lifting a TRAM flap did not seem to increase sensory alterations or postoperative pain in the abdominal donor site after breast reconstruction surgery. Cautious microneurovascular dissection techniques may even improve sensory recovery of the abdominal skin after TRAM flap breast reconstruction surgery.

Subjective sensory symptoms associated with axonal and demyelinating nerve injuries after mandibular sagittal split osteotomy.

PURPOSE: The effect of the type of nerve injury on subjective sensory disturbances and recovery has not been addressed in orthognathic surgery. Using neurophysiologic monitoring during 19 bilateral sagittal split osteotomy operations, we were able to classify intraoperative inferior alveolar nerve injuries as either axonal or demyelinating. This study aimed to analyze the quality and extent of the subjective sensations experienced by the patients after these 2 injury types at different time points up to 12 months. MATERIALS AND METHODS: Of the 36 injured nerves, 21 showed signs of demyelinating injury and 15 showed signs of axonal damage. The quality of subjective sensory symptoms was asked about at 2 weeks and 1, 3, 6, and 12 months postoperatively and classified into 4 categories: normal, negative, positive (including pain), and mixed sensations. In addition, the extent of the sensory alteration was determined by measuring the affected skin regions from symptom charts. RESULTS: The quantity, quality, and evolution of experienced subjective sensations differed between the injury types during follow-up: Subjective sensations normalized more rapidly after demyelinating-type injuries than after axonal-type injuries. Persistence of mixed sensation patterns at 3 months and appearance instead of disappearance of positive sensory phenomena after 3 months indicated axonal damage. Painful sensations at 1 month or later after surgery indicated axonal damage and predicted poor recovery and more long-term sequelae. CONCLUSIONS: Postoperative pain at 1 month and type of nerve injury are important prognostic factors for the persistence of subjective symptoms and development of neuropathic pain.

A new approach to microneurovascular TRAM-flap breast reconstruction--a pilot study.

BACKGROUND: The aims of the present study were to investigate whether microneurovascular breast reconstruction with a free transverse rectus abdominis musculocutaneous (TRAM) flap and nerve repair with nerves other than ThIV and ThXI improve sensory recovery of the breast compared to traditional free TRAM flap without nerve repair, and which nerve is optimal for the neural anastomosis of the flap. METHODS: Twenty breast cancer patients underwent breast reconstruction with a free TRAM flap and nerve repair (neuro-TRAM) with the best available nerve from the axillary area and 20 control patients had traditional free TRAM flap without nerve repair (standard-TRAM). Neurorrhaphy was done by end-to-end or end-to-side techniques. Sensory and quantitative sensory testings (QST) were performed. Patient satisfaction was evaluated by a clinical questionnaire. The results were analysed by Mann-Whitney tests. RESULTS: Mean follow-up was 32 months for the neuro-TRAM, and 54 months for the standard-TRAM group. Sensory outcome was better in the neuro-TRAM group (sensory score 45% of that of the contralateral breast) than in the standard-TRAM group (26% of the contralateral side). The median (quartiles) of total scores in the operated breasts was 12.9 (9.5-19.2) in neuro-TRAM group and 8.1 (3.5-10.7) in standard-TRAM group (Mann-Whitney Test (p=0.006)). All nerves available in the thoracic and axillary areas and both of the anastomosis techniques were successful in the reinnervation procedure. Nerve repair did not influence overall patient satisfaction. CONCLUSIONS: This study indicates that any nerve repair results in improved sensory recovery after TRAM flap breast reconstruction. Any nerve available for anastomosis in the recipient site is potentially able to provide moderately good cutaneous sensibility to the TRAM-breast.

Difficult diagnosis of facial pain: A case report and mini-review.

This case report elucidates pitfalls of clinical and radiologic investigations of neuropathic pain due to trigeminal pathology, and utility of neurophysiologic examination when diagnosing facial pain. Our patient was a 63-year-old woman who developed acute, severe facial pain, first located behind the left eye. Neuralgic exacerbations, paresthesia within lower face on the left and restricted mouth opening occurred during the course of the disease with gradual progression. Brain MRI and CT scans were interpreted as normal at 4 and 10 months after symptom onset. At 9 months, detailed neurophysiologic examination showed severe chronic mandibular neuropathy at the left oval foramen with more prominent disturbance of the thick myelinated nerve fibers than the small fibers suggesting compressive etiology. Guided by the neurophysiologic findings, 11 months after the onset of the symptoms, a new brain MRI with contrast enhancement revealed metastatic adenocarcinoma of the left temporal bone along the mandibular nerve, exactly matching the site indicated by the neurophysiologic examination. Neurophysiologic tests offer cost-effective, sensitive tools for screening and accurate level diagnostics of neuropathy and neuropathic pain, which can be utilized also in the diagnosis of facial pain. In addition, whenever there are progressing neurologic deficits or neurophysiologic signs indicating expansive lesion, despite initially normal findings in the brain imaging studies, repeated MRI examinations are warranted, preferably focusing to the 'neurophysiologic region of interest' to avoid radiologic sampling errors. As no isolated technique achieves 100% diagnostic accuracy, only rational combinations of different methods will result in correct diagnosis of facial pain without unnecessary delays. Treatment of neuropathic pain is often delayed because of difficulties in reaching the correct diagnosis. During the work-up, many differential diagnostic alternatives have to be considered, also in patients with chronic orofacial pain. Table 1 shows the most important differential diagnoses of orofacial pain.

Neuropathic symptoms and findings in women with Fabry disease.

OBJECTIVE: To examine the neurologic and neurophysiologic findings and neurologic symptoms in 12 women with Fabry disease and to study the relationship between the subjective symptoms and the findings on the various tests done. METHODS: Neurography, vibratory and thermal quantitative sensory testing (QST), skin biopsy for measuring intraepidermal nerve fiber density (IENFD). Heart rate variability (HRV) and sympathetic skin response (SSR) tests for detecting autonomic dysfunction, pain-, depression- and somatic symptom questionnaires and clinical examination. RESULTS: Only two women had no persistent symptoms or signs of polyneuropathy, 10 had symptoms of small fiber neuropathy. Neurological examination was normal in most patients. Five patients had decreased IENFD or thermal hypoesthesia in QST. In QST, Adelta-fiber function for innocuous cold was more often impaired than C-fiber function. Conventional nerve conduction studies were mostly normal. Carpal tunnel syndrome (CTS) incidence was increased, 25% had symptomatic CTS. CONCLUSIONS: Heterozygous women carrying the gene for Fabry disease have symptoms and findings of small-fiber polyneuropathy more often than has previously been considered. The prevalence of CTS is also increased. SIGNIFICANCE: While the clinical diagnosis of small-fiber neuropathy is difficult, the diagnostic yield can be increased using a combination of thermal QST and IENFD measurements.

Electrophysiological findings in X-linked myopathy with excessive autophagy.

We report electrophysiological features and magnetic resonance imaging muscle findings in 4 patients and 1 female carrier of X-linked myopathy with excessive autophagy. Motor units were polyphasic with high mean amplitude and normal duration. The thigh muscles were most severely involved, but myotonic discharges were abundant in both clinically affected and unaffected muscles. Along with the clinicopathological features, these electrophysiological findings distinguish X-linked myopathy with excessive autophagy from other limb-girdle myopathies.