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1: Childs Nerv Syst. 2008 May;24(5):587-91. Epub 2007 Dec 6.Click here to read Links

Outcomes after surgery for focal epilepsy in children.

Departments of Neurosurgery and Neurology, Primary Children's Medical Center, University of Utah, Salt Lake City, UT, USA.

OBJECT: Surgery is an effective treatment for selected patients with intractable epilepsy. The authors report the outcomes of focal resection in a series of children suffering from intractable focal epilepsy treated at a single institution. METHODS: The authors retrospectively analyzed a series of 58 consecutive children who underwent surgery between 1998 and 2006 for intractable localized epilepsy at Primary Children's Medical Center. Evaluation for surgery and follow-up was performed by the authors in the combined Pediatric Epilepsy Surgery Clinic. RESULTS: Preoperative seizure duration ranged from 6 months to 15 years. The cause of epilepsy was mesial temporal sclerosis (MTS) in 16 patients, dual pathology (MTS plus another lesion) in 3 patients, low-grade tumors in 16 patients, cortical dysplasia (CD) in 13 patients, cavernous malformation (CM) in 5 patients, and other conditions in 5 patients. In 33 cases, the lesions were in the temporal lobe, and in 25 cases, the lesions were extratemporal. At last follow-up, 74% (43/58) of all patients were seizure-free; seizure-free rates for specific conditions were 88% (14/16) for MTS, 33% (1/3) for dual pathology, 81% (13/16) for tumor, 62% (8/13) for CD, and 80% (4/5) for CM. Seizure-free rates were 85% (28/33) for temporal locations and 60% (15/25) for extratemporal locations. There were no permanent neurological complications or deaths. CONCLUSION: Surgery for localized epilepsy in carefully selected children has good seizure control rates with minimal complications. Outcomes for patients with resections in temporal locations were better than those for patients with extratemporal resections.

PMID: 18058111 [PubMed - indexed for MEDLINE]

2: Childs Nerv Syst. 2008 Feb;24(2):169-72; discussion 173. Epub 2007 Nov 20.Click here to read Links

Epilepsy associated with shaken baby syndrome.

Department of Pediatric Neurosurgery, Hôpital Necker Enfants Malades, 149 rue de Sèvres, 75015, Paris, France. marie.bourgeois@nck.aphp.fr

OBJECT: The shaken baby syndrome (SBS) is an important cause of developmental delay in infants. Epileptic seizures are a common feature of this syndrome. The aim if this study is to analyse the impact of the early and late seizures disorder. MATERIALS AND METHODS: We have retrospectively reviewed the clinical and electrophysiological findings in a series of 404 children hospitalised with SBS. RESULTS: In the acute phase, clinical epileptic seizures of various semiologies were found in 73% of the infants. Only 11% of the children had a normal EEG on admission. A poor outcome was found in 88% of the children in case of persisting EEG anomalies despite anti-epileptic treatment with 48% mortality in these patients. The development of refractory epilepsy was also associated with a poor outcome in this series. In fact 96% of the children with seizure recurrence had behavioural problems. CONCLUSIONS: The early recognition and subsequent management of these seizures is vital to prevent further neurological injury. Delayed or recurrent epileptic seizures may occur with a different semiology to the seizures in the acute phase and are also associated with a poor prognosis.

PMID: 18026964 [PubMed - indexed for MEDLINE]

3: id: 18026963 Error occurred: The following PMID is not available: 18026963
4: Childs Nerv Syst. 2008 Jun;24(6):671-3.Click here to read Links

Epilepsy in pre-Columbian times.

Servicio de Neurocirugía, Hospital Juan P. Garrahan, Pichincha 1880, Buenos Aires, Argentina. hpomata@fibertel.com.ar

PMID: 17962957 [PubMed - indexed for MEDLINE]

5: Childs Nerv Syst. 2008 Feb;24(2):275-9. Epub 2007 Sep 9.Click here to read Links

Transcallosal resection of hypothalamic hamartoma for gelastic epilepsy.

Department of Paediatric Neurology, Oxford Radcliffe Hospitals NHS Trust, Oxford, UK. moragandrew@hotmail.com

INTRODUCTION: Hypothalamic hamartomas (HHs) are commonly associated with severe epilepsy resistant to anticonvulsant therapy. Historically, surgical resection of HHs resulted in considerable morbidity. DISCUSSION: Two series of patients who successfully underwent resection using a transcallosal approach have now been published; we report the first UK experience of this technique in a series of five patients with HHs and gelastic epilepsy resistant to anticonvulsant therapy. Patients were assessed pre- and postoperatively for seizure activity, endocrine function, ophthalmology, and neurocognitive function. Two patients had precocious puberty and all had evidence of developmental delay and behavioral problems. Postoperatively, all children experienced at least a 50% reduction in seizure frequency with abolition of major seizure types; one child remains seizure-free. One child developed a mild postoperative right hemiparesis and one developed transient diabetes insipidus. CONCLUSION: There were no adverse developmental effects of surgery. Transcallosal resection of HHs ameliorates resistant epilepsy syndromes associated with HH.

PMID: 17828541 [PubMed - indexed for MEDLINE]

6: Childs Nerv Syst. 2008 Jan;24(1):125-34. Epub 2007 Aug 7.Click here to read Links

Epilepsy associated with a cerebellar arachnoid cyst: seizure control following fenestration of the cyst.

Division of Paediatric Neurosurgery, Department of Paediatric Surgery, University of British Columbia, 4480 Oak Street, #K3-159, Vancouver, BC, V6H 3V4, Canada.

OBJECTIVE: The role of the cerebellum in the pathogenesis of seizures remains controversial. Cerebellar origin of seizures, albeit rare, has been described in the literature in association with intrinsic lesions of the cerebellum. We present a unique case of a patient with medically intractable, secondary generalized epilepsy, associated with a superior cerebellar quadrigeminal arachnoid cyst. CLINICAL PRESENTATION: A 9-year-old child presented with medically refractory secondary generalized epilepsy associated with recurrent headaches since 6 months of age. The child also had moderate intellectual impairment and autism. On the magnetic resonance imaging (MRI) of the head, he was noticed to have a small superior cerebellar arachnoid cyst in the quadrigeminal area that had increased in size slightly. Interictal electroencephalograph (EEG) was unable to localize the site of the epilepsy. Neurological examination was unremarkable. INTERVENTION: A suboccipital craniotomy and supracerebellar infratentorial approach to the cyst was performed at 9 years of age. Intraoperative electrocorticography (ECOG) demonstrated epileptic activity from the cerebellar tissue adjacent to the cyst. The cyst was fenestrated, and the cyst wall was sent for histology. Seizure control improved dramatically after fenestration of the cyst. CONCLUSION: This case provides strong evidence that, albeit rare, the cerebellum may be a source of epileptic activity due to compression by a lesion in the posterior fossa. Hence, in cases with intractable epilepsy of unknown supratentorial source, the differential diagnosis should include a posterior fossa lesion. The finding of a posterior fossa lesion in such cases, even if it is small and appears benign, should precipitate a discussion about the possible relationship between the posterior fossa lesion and the epilepsy.

PMID: 17680249 [PubMed - indexed for MEDLINE]

7: Childs Nerv Syst. 2007 Aug;23(8):881-6. Epub 2007 Apr 21.Click here to read Links

Incidence of vascular malformations in spontaneous intra-cerebral haemorrhage in children.

Department of Paediatric Neurosurgery, Birmingham Children's Hospital, Steelhouse Lane, B4 6NH, Birmingham, UK.

AIM: To assess the incidence of vascular malformations in children presenting with non-traumatic intra-cerebral haemorrhage and outline the need for radiological investigations. MATERIALS AND METHODS: Between 1993 and 2002, 26 children presented with spontaneous intra-cerebral haemorrhage at a mean age of 26 months (range 1-192 months). RESULTS: Twenty-two children had, as first treatment, surgical removal of the haematoma and any malformation found. One patient with no evidence of vascular malformation had conservative treatment, two had embolisation and one had stereotactic radiosurgery of arteriovenous malformations (AVMs). The diagnosis of vascular malformation was confirmed histologically and/or radiologically in 16 (61%) patients. Of these 16 patients, 7 were AVMs, 1 thrombosed middle cerebral artery (MCA) aneurysm, 1 cavernous angioma, 6 aggregates of abnormal vessels, 1 vein of Galen aneurysm. Pre-operatively, 12 patients had magnetic resonance imaging (MRI)/magnetic resonance angiography (MRA) and 7 were positive for vascular malformation (1 false positive) with no false negatives. Digital subtraction angiography (DSA) was performed pre-operatively in 7 patients, 4 were positive with no false negatives. There were no re-bleeds at the follow-up period. Five (19%) patients died from the haemorrhage, 7 (27%) had severe neurological deficit and 14 (54%) had no neurological deficit. Residual malformation after surgery requiring additional treatment was found in 3 (16%) patients. All patients with confirmed malformations were followed-up with DSA. CONCLUSION: MRI/MRA has high sensitivity and specificity in identifying vascular malformations in children presenting acutely with spontaneous intra-cerebral haemorrhage. This may prove useful when pre-operative DSA is not promptly available. After acute clot evacuation, there is high incidence of residual malformation and such patients should be followed-up with DSA.

PMID: 17450369 [PubMed - indexed for MEDLINE]

8: Childs Nerv Syst. 2007 Aug;23(8):917-20. Epub 2007 Apr 21.Click here to read Links

Corpus callosotomy using conformal stereotactic radiosurgery.

Unidad de Radioneurocirugía, Instituto Nacional de Neurología y Neurocirugía, Insurgentes sur 3877, La Fama, Tlalpan, 14269, México, D.F., México. macelisl@yahoo.com.mx

OBJECTS: To show the clinical results of a corpus callosotomy (CC) treatment using conformal stereotactic radiosurgery (SRS) on a patient with medically intractable multifocal epilepsy. MATERIALS AND METHODS: A 17-year-old male patient underwent corpus callosotomy conformal SRS using a dedicated linear accelerator (linac) with dynamic arcs technique. The prescribed dose was 36.0 Gy at the periphery of the rostrum, genu, and a half of the body of the corpus callosum (CCA). At 8 months after conformal SRS, the patient developed a significant brain edema and moderate transitory motor deficit, which were controlled with steroids. After 32 months follow-up, there is an improvement of 84% on drop attacks and generalized tonic-clonic seizures. CONCLUSIONS: Conformal SRS for corpus callosotomy with a single isocenter reproduce the results reported on literature using Gamma Knife-based SRS. The results show that this technique is safe and demonstrate its efficacy to control seizures.

PMID: 17450365 [PubMed - indexed for MEDLINE]

9: Childs Nerv Syst. 2007 Aug;23(8):873-80. Epub 2007 Mar 24.Click here to read Links

Severe head injury in early infancy: analysis of causes and possible predictive factors for outcome.

Neurosurgery Department, Padova University, Cà Foncello Hospital, 31100 Treviso, Italy. emarton@libero.it

OBJECT: The aim of this study was to analyse the causes and prognostic factors for outcome in severe traumatic brain injuries (TBI) in early infancy. MATERIALS AND METHODS: We present a retrospective study on 16 infants aged less than 12 months observed over the last 20 years in our department for severe brain injury. Infants were evaluated by the Children Coma Scale (CCS). We assessed Glasgow Outcome Scale (GOS) at discharge and at 12 months after discharge. CONCLUSIONS: The main causes of trauma were domestic accidents followed by car accidents. The highest positive correlation was found between the GOS score at 1 year and the presence of hypoxia and hypotension at admission, the presence of hyperglycaemia at 24 h and the occurrence of major clotting disorders. A significant but weaker correlation was found with the CCS at admission, the occurrence of early post-traumatic seizures and the length of stay in the intensive care unit.

PMID: 17384952 [PubMed - indexed for MEDLINE]

10: Childs Nerv Syst. 2008 Jan;24(1):1-2.Click here to read Links

Early bone-setting procedures and epileptic seizure at the times of Alexander of Tralles.

Department of Neurosurgery, Adnan Menderes University School of Medicine, 09100, Aydin, Turkey. drmturgut@yahoo.com

PMID: 17622540 [PubMed - indexed for MEDLINE]

11: Childs Nerv Syst. 2007 Nov;23(11):1309-12. Epub 2007 Jul 10.Click here to read Links

Vagus nerve stimulation in children with refractory epilepsy: unusual complications and relationship to sleep-disordered breathing.

Section of Neurology, St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, PA 19134, USA. Divya.Khurana@drexelmed.edu

BACKGROUND: Vagus nerve stimulation (VNS) is approved for use in patients with refractory epilepsy over the age of 12 years. While this procedure is widely used, there is little data on adverse events in young children. MATERIALS AND METHODS: A retrospective chart review was conducted on 26 children who had VNS implantation for refractory epilepsy from 1998 to 2004. RESULTS: Ages ranged from 3 to 17 years (16 boys and 10 girls). Seventy-seven percent had moderate to severe mental retardation. Sixty-five percent had more than 30 seizures per month. Symptomatic-generalized epilepsy was the predominant epilepsy syndrome seen in 77% of children. The duration of VNS treatment ranged from 1 month to 8 years (mean = 3.5 years). Twenty of 26 patients (77%) were on rapid-cycling mode. More than 50% reduction in seizure frequency was noted in 54% with two patients achieving seizure freedom. Twenty-three percent had less than 50% seizure reduction. Four patients were able to terminate seizures with use of the magnet. VNS was removed from one patient because of intractable cough persisting in spite of stimulation being turned off for 1 month. Another patient had it removed twice for infection. Obstructive sleep apnea (OSA) was observed in four patients (15%) after placement of VNS. CONCLUSION: VNS appears to be an effective treatment for children with refractory epilepsy. Development of intractable cough in one patient in spite of device being turned off and recurrent infection-related removal in another are unusual complications. Polysomnography before implantation of VNS should be considered to identify patients with pre-existing OSA.

PMID: 17619887 [PubMed - indexed for MEDLINE]

12: Childs Nerv Syst. 2007 Nov;23(11):1301-7. Epub 2007 Jun 19.Click here to read Links

Nonspecific mitochondrial disease with epilepsy in children: diagnostic approaches and epileptic phenotypes.

Department of Pediatrics, Epilepsy Center, Sanggye Paik Hospital, Inje University College of Medicine, Sang-gye 7 Dong 761-1, Nowon-gu, Seoul 139-707, South Korea.

OBJECTIVES: This study sought to characterize epileptic phenotypes in children with nonspecific mitochondrial disease (MD) and to evaluate MD diagnostic approaches. METHODS: A retrospective analysis of the medical, electroencephalogram, and laboratory records of 142 patients with epilepsy was performed. The patients were evaluated for MD, and 124 patients were included in the final cohort. The MD criteria used included an oral glucose lactate stimulation test (OGLST) and urine organic acid/plasma amino acid (UOA/PAA) assays as metabolic indicators of modified Walker criteria, as suggested by Bernier et al. (Neurology 59:1406-1411, 2002). RESULTS: Twenty-two patients were classified as having definite MD (9), probable MD (5), possible MD (6), or pyruvate dehydrogenase (PDH) deficiency (3), including one patient which showed a respiratory chain (RC) defect and PDH deficiency. Seven out of eight patients in whom significant RC defects were observed showed complex I defects. In 14 patients, epileptic seizures start at infantile ages. Of 17 patients who substantially presented generalized seizures, 4 patients started with partial seizures. Five patients consistently presented only partial seizures. The OGLST and UOA/PAA assays were useful for a more precise diagnosis of MD, although low positive predictive value of the OGLST was regrettable. No patient was classified as definite MD by Walker's original criteria, but the use of our revised MD criteria resulted in the classification of nine additional patients as definite MD. CONCLUSIONS: MD manifested considerable diverse epileptic phenotypes and should be considered in the differential diagnosis of epilepsy in children with unexplained encephalomyopathy and progressive and fluctuating clinical courses.

PMID: 17576572 [PubMed - indexed for MEDLINE]

13: Childs Nerv Syst. 2007 May;23(5):559-67. Epub 2006 Oct 13.Click here to read Links

A report of two cases with dolichosegmental intracranial arteries as a new feature of PHACES syndrome.

Service de Neuroradiologie Diagnostique et Thérapeutique, Hôpital de Bicetre, 78 rue du General-Leclerc, 94275, Le Kremlin Bicêtre, France.

BACKGROUND: We describe two previously unreported cases with complete or incomplete expression of PHACES syndrome, a rare congenital syndromal pediatric disorder, which is characterized by posterior cranial fossa malformations, large facial hemangiomas, arterial anomalies, coarctation of the aorta and cardiac defects, abnormalities of the eye, sternal and supraabdominal raphe defects. CASE REPORTS: These two children exhibited a feature not reviewed extensively in the literature, namely, segmental elongation and dilatation of intracranial arteries associated with intracranial occlusive arterial disease, predominantly on the anterior division of the internal carotid artery (ICA) and on the P2 segment of the posterior cerebral artery. This dolichoectasia was found at the distal cervical internal carotid artery, the intradural segment of the ICA before the division, the trigeminal artery, and the posterior division of the ICA. We presume that the different forms of arterial involvement in PHACES syndrome (arterial stenoses, segmental agenesis of vessels, and the dolichoectasia described in this study) constitute a spectrum of angiogenetic dysfunctions related to an embryonic event involving several cephalic neural crest segments of the dorsal aorta.

PMID: 17053935 [PubMed - indexed for MEDLINE]

14: Childs Nerv Syst. 2007 Mar;23(3):265-7.Click here to read Links

Video game epilepsy in the twentieth century: a review.

Department of Anatomy and Neurosurgery, Tabriz Medical University, Tabriz, Iran.

INTRODUCTION: Visually evoked seizures have been reported for almost 2,000 years. This source of seizure activity, however, seems to have increased recently with the advent of new technologies used for television and computer games. METHODS: The present paper reviews the literature regarding this interesting phenomenon. RESULTS: After our review, it does appear that visually evoked seizures have increased in frequency during the twentieth century. CONCLUSIONS: We believe that knowledge of visually evoked seizures may aid neuroscientists in further exploration of the pathophysiology of seizure activity and its related preventive measures. Further studies are necessary to prove the etiology of such seizure activity.

PMID: 17211654 [PubMed - indexed for MEDLINE]

15: Childs Nerv Syst. 2006 Dec;22(12):1635-7. Epub 2006 Oct 13.Click here to read Links

Bilateral perysilvian polymicrogyria in Chiari I malformation.

Child Neurology Division, Department of Pediatrics, University La Sapienza, Viale Regina Elena, 324, 00161, Rome, Italy.

CASE REPORT: We report on a 7-year-old girl with generalized epilepsy and mental retardation. DISCUSSION: Neurologic examination was normal and only facial dysmorphic features, compatible with frontonasal dysplasia, were observed. However, magnetic resonance imaging (MRI) revealed Chiari I malformation together with bilateral opercular polymicrogyria. To our knowledge, this is the first report of the association of these developmental disorders. This condition raises questions regarding the ethiopathogenetic classification of Chiari spectrum and as to whether embryologic and genetic causes could be potentially interconnected.

PMID: 17058087 [PubMed - indexed for MEDLINE]

16: Childs Nerv Syst. 2007 Mar;23(3):321-6. Epub 2006 Nov 7.Click here to read Links

Outcome of hemispheric surgeries for refractory epilepsy in pediatric patients.

Department of Neurology, Psychiatry and Psychology, Ribeirão Preto School of Medicine, University of São Paulo, CEP 14048-900 Ribeirão Preto, São Paulo, Brazil. vctbusta@mp.fmrp.usp.br

BACKGROUND: Hemispheric brain lesions are commonly associated with early onset of catastrophic epilepsies and multiple seizure types. Hemispheric surgery is indicated for patients with unilateral intractable epilepsy. Although described more than 50 years ago, several new techniques for hemispherectomy have only recently been proposed aiming to reduce operatory risks and morbidity. MATERIALS AND METHODS: We present the clinical characteristics, presurgical workup, and postoperative outcome of a series of pediatric patients who underwent hemispherectomy for medically intractable epileptic seizures. Thirty-nine patients with medically intractable epilepsy underwent surgery from 1996 to 2005. RESULTS AND DISCUSSION: We analyzed demographic data, interictal and ictal EEG findings, age at surgery, surgical technique and complications, and postsurgical seizure outcome. There were 74.4% males. Tonic and focal motor seizures occurred in 30.8 and 20.5% of the patients. Most frequent etiologies were Rasmussen encephalitis (30.8%) and malformation of cortical development (23.1%). Postsurgical outcomes were Engel classes I and II for 61.5% of the patients. In general, 89.5% of the patients exhibited at least a 90% reduction in seizure frequency. All patients had acute worsening of hemiparesis after surgery. Basically, two surgical techniques have been employed, both with similar results, although a trend has been noted toward one of the procedures which produced consistently complete disconnection. Patients with hemispheric brain lesions usually have abnormal neurological development and intractable epilepsy. When video-EEG monitoring and magnetic resonance imaging show unilateral disease, the patient may evolve with a good surgical outcome. We showed that a marked reduction in seizure frequency may be achieved, with acceptable neurological impairments.

PMID: 17089170 [PubMed - indexed for MEDLINE]

17: Childs Nerv Syst. 2007 Jan;23(1):91-7. Epub 2006 Oct 13.Click here to read Links

Evaluation of quality of life and clinical status of children operated on for intractable epilepsy.

Department of Pediatric Neurosurgery, Medical University of Silesia, ul. Medykow 16, 40-752, Katowice, Poland. dawilar@poczta.onet.pl

AIM: The aim of the study was evaluation of surgical treatment of epilepsy measured by changes in quality of life (QOL) and in seizure frequency and severity. MATERIALS AND METHODS: Examined group consists of 24 boys and 9 girls. We performed corpus callosotomy, lesionectomy, vagal nerve stimulation, temporal lobectomy and multiple subpial transections. Age at surgery ranged from 5 months to 19 years, with mean follow-up of 11.9 months. QOL was evaluated on the basis of the questionnaire created by us, in which parents were asked to assess the following variables before and after the surgical procedure: communication, socialization, daily living skills, movement abilities and behavioural problems. The seizure frequency was assessed with the Engel's scale, the modified Engel's scale and the Seizure Scoring System. Clinical state of all the patients was evaluated as well. RESULTS: There were no patients with stable and worsening QOL status. In the whole group treated with callosotomy, the considerable improvement in QOL concerned 36.4% of cases. In more than 95% of cases, the reduction in seizures frequency is greater than 75%. In more than 43% of patients, there are no seizures after surgery. CONCLUSIONS: Surgical treatment of intractable epilepsy is an effective method in terms of both seizure control and QOL improvement. Our results indicate the improvement in QOL of all operated patients. The improvement in QOL was accompanied by decrease in frequency and 'positive' changes in morphology of seizures. Improvement in QOL, as equivalent to seizure reduction rate, may influence further differentiation of qualification methods and surgical procedures of epilepsy.

PMID: 17053940 [PubMed - indexed for MEDLINE]

18: Childs Nerv Syst. 2006 Sep;22(9):1167-9. Epub 2006 May 23.Click here to read Links

Vagus nerve stimulation in children less than 5 years old.

Section of Pediatric Neurosurgery, University of Alabama at Birmingham and Children's Hospital Birmingham, 1600 7th Avenue South ACC 400, Birmingham, AL 35233, USA.

INTRODUCTION: Vagus nerve stimulation (VNS) has been used in both adults and older children with varying success. MATERIALS AND METHODS: We retrospectively reviewed our experience with VNS in very young children (below 5 years old). The mean age at stimulator implantation was 20.5 months. Two patients were below 2 years old at implantation and two patients were below 1 year old at their initial surgery. The average follow up time for this group was 22 months. RESULTS: Of the six patients (three males and three females) with long-term follow up, 83% had a significant decrease in the frequency of their seizure. Of these, two are seizure-free (33%), three are improved (50%), and one (17%) has had no change in seizure status at their most recent clinical examination. Age at implantation of the vagus nerve stimulator did not seem to correlate with patient success. In this group, atonic seizures were found to best respond to VNS with cessation of this type of seizure in two patients. No patients were made worse by the procedure and no morbidity was observed related to VNS. CONCLUSIONS: Based on our small patient cohort, it appears that VNS in very young children with life-threatening epilepsy can be efficacious. Larger groups and other institutional experiences are now needed to verify our findings.

PMID: 16718501 [PubMed - indexed for MEDLINE]

19: Childs Nerv Syst. 2006 Dec;22(12):1611-8. Epub 2006 Aug 30.Click here to read Links

Clinical features and epileptogenesis of dysembryoplastic neuroepithelial tumor.

Department of Pathology, Chonnam National University Medical School and Hospital, 5 Hakdong, Dongku, Gwangju, 501-746, South Korea. mclee@jnu.ac.kr

INTRODUCTION: Dysembryoplastic neuroepithelial tumor (DNT) frequently causes medically intractable epilepsy. OBJECTIVE: The aim of this study was to investigate the basic mechanism of epileptogenecity of the tumor. MATERIALS AND METHODS: Clinicopathological data in 13 cases of DNT and immunohistochemical changes of ionotropic glutamate receptor subunits in the tumor and peritumoral epileptogenic cortex were studied. CONCLUSIONS: Magnetic resonance imaging combined with electroencephalography (EEG), electrocorticography, and depth-electrode EEG was valuable to localize complicated epileptogenic zones of the patients with DNT. Neuropathological examinations of the peritumoral cerebral cortex presenting abnormal spikes showed different histopathological grades of neuronal migration disorder (NMD). The tumor cells in DNT disclosed increased immunopositivities of N-methyl-D: -aspartate receptor 1 (NR1) and NR2A/B, and peritumoral epileptogenic NMD revealed increased immunopositivities of GluR2 and GluR3. The amplification of ionotropic glutamate receptor subunits in the tumor and peritumoral NMD may be the underlying cause of epileptic seizures in DNT patients.

PMID: 16944177 [PubMed - indexed for MEDLINE]

20: Childs Nerv Syst. 2006 Aug;22(8):936-44. Epub 2006 Jul 11.Click here to read Links

Temporal lobe resections.

Great Ormond Street Hospital for Children NHS Trust, London, UK. harknw@gosh.nhs.uk

INTRODUCTION: In the 50 years since Penfield outlined the requirements of the epilepsy surgeon, we have seen the introduction of the digitised electroencephalogram (EEG), video telemetry and the magnetic resonance imaging (MRI) scan. In the operating room, advances in neuro-anaesthesia, the introduction of the operating microscope, image guidance and the ultrasonic aspirator have greatly enhanced the surgeons' technical ability. Despite these changes, the thesis encapsulated in Penfield's statement is that the surgeon needs to understand and interpret the preoperative data in such a way as to identify as closely as possible the epileptogenic zone where he must carry out surgery with the utmost care and diligence, and finally, in the context of audit and follow-up of his surgical patients, he must be able to predict for each individual case the likelihood of success and failure of any particular procedure. CONCLUSION: Previous articles in this supplement have looked at the specific investigations carried out to identify the epileptogenic zone, but once this data has been gathered, it is the responsibility of the neurosurgeon, within the context of the multidisciplinary team, to decide whether surgery is both feasible and advisable and then to discuss this in depth with the patient and their family and carers. The multidisciplinary epilepsy surgery meeting allows cases to be discussed in an open forum and the decisions made in this meeting can then be discussed with the family. The process of consent will begin from the moment any surgical procedure is discussed and should, wherever possible, be reinforced with written, as well as verbal, information. The process of consent should be a continuum until the actual day of surgery. All parties involved in the care and management of the patient should be regarded as stakeholders in this decision, and it is vital that all these stakeholders are working towards a common goal. OBJECTIVES: In this article, I will consider the specific aspects of the presurgical investigations that are applicable to the temporal lobe and the differing types of surgery that are likely to be indicated. I will then describe, in detail, the surgical technique of temporal lobe resection, highlighting some of the pitfalls and successes that such surgery can provide.

PMID: 16832669 [PubMed - indexed for MEDLINE]

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