Publications by authors named "Likeman M"

Article Synopsis
  • Hippocampal sclerosis (HS) is a major cause of temporal lobe epilepsy (TLE) but can be hard to detect on MRI, leading to surgical delays, so researchers created open-source software to improve diagnosis.
  • The study involved 365 participants, using the software HippUnfold to analyze MRI scans and develop a logistic regression model that accurately identifies and localizes HS.
  • The classifier showed high accuracy in detecting HS in both initial and independent patient cohorts, proving effective for individual assessments by comparing patient data with normative growth patterns.
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Introduction: Traumatic brain injury (TBI) is a leading cause of acquired neurological morbidity. The prevalence of post-traumatic hypopituitarism (PTHP) and associated morbidity after childhood TBI is unclear. Our study investigated long term HPA (hypothalamus-pituitary-adrenal) axis function, in a prospective childhood TBI and control cohort, using measures of cortisol/cortisone secretion (physiological, stimulated), HPA axis feedback and exploring associations with fatigue, depression and Quality of Life (QoL) outcomes.

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Aim: To investigate how magnetic resonance imaging (MRI) examinations are protocolled in tertiary paediatric neuroradiology centres around the UK for some of the more common presentations encountered in paediatric neuroradiology, and to identify any variations of note.

Materials And Methods: All 19 UK tertiary paediatric neuroradiology centres registered with the British Society of Neuroradiologists-Paediatric Group were contacted and asked if they could provide a copy of their standard MRI protocols. Twelve responded (63%) and 10 of the more common presentations were selected and the standard acquired sequences obtained at each participating centre were compared.

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Objective: To report a prospectively planned analysis of two randomised controlled trials with embedded comparisons of prednisolone versus tetracosactide depot for the treatment of infantile epileptic spasms syndrome (IESS).

Methods: Individual patient data from patients randomly allocated to prednisolone or tetracosactide depot were analysed from two trials (UKISS, ICISS). The comparison was embedded within trials in which some patients also received vigabatrin but only patients receiving monotherapy with randomly allocated hormonal treatments are included in this analysis.

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One outstanding challenge for machine learning in diagnostic biomedical imaging is algorithm interpretability. A key application is the identification of subtle epileptogenic focal cortical dysplasias (FCDs) from structural MRI. FCDs are difficult to visualize on structural MRI but are often amenable to surgical resection.

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Introduction: Intradural, extra-axial cerebral cavernous malformations (CCMs) are rare entities and are mostly reported in relation to the optic apparatus or the facial/vestibulocochlear complex. Cranial nerve CCMs tend to follow a clinically aggressive course, with a tendency to progressive neurological dysfunction following intra-lesional haemorrhage or less commonly due to the effects of subarachnoid haemorrhage.

Case Presentation: We report the first case of a trigeminal CCM presenting in a child with otalgia and left-sided headaches.

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Objective: Drug-resistant focal epilepsy is often caused by focal cortical dysplasias (FCDs). The distribution of these lesions across the cerebral cortex and the impact of lesion location on clinical presentation and surgical outcome are largely unknown. We created a neuroimaging cohort of patients with individually mapped FCDs to determine factors associated with lesion location and predictors of postsurgical outcome.

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Background: Tuberous Sclerosis Complex (TSC) is a genetic disorder characterised by the development of benign tumours secondary to loss of inhibitory regulation of the mTOR (mechanistic Target of Rapamycin) intracellular growth pathway. Metformin inhibits the mTOR pathway. We investigated whether metformin would reduce growth of hamartomas associated with tuberous sclerosis complex.

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Objective: Takotsubo stress cardiomyopathy is characterized by dysfunction of the left ventricle of the heart including apical ballooning and focal wall-motion abnormalities. Although reported in association with seizures and intracerebral hemorrhage, there are no studies reporting its occurrence in patients having stereoelectroencephalography (sEEG).

Methods: A 38-year-old lady with no prior history of cardiac disease experienced sudden onset chest pain and acute left ventricular failure 4 hours following explantation of stereoelectroencephalogram electrodes.

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Article Synopsis
  • A study examined the causes and treatment responses in 377 infants with infantile spasms, finding that 58% had a known underlying cause, with varying response rates to different treatments.* -
  • Infants with strokes showed better treatment responses (82%) compared to other causes (56%), and those with Down syndrome had similar response rates across treatment types, indicating no significant advantage from adding vigabatrin.* -
  • The findings highlight the importance of classification for comparing outcomes and suggest that specific underlying conditions may be linked to better or different responses to treatment in infantile spasms.*
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Context: Traumatic brain injury (TBI) is a recognised cause of hypopituitarism in adults but the prevalence after childhood TBI remains controversial.

Objective: To investigate long-term endocrine outcomes and quality of life (PedsQL and QoL-AGHDA (Quality of Life in Adult Growth Hormone Deficiency Assessment)) following childhood TBI.

Design: Prospective study.

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Article Synopsis
  • The International Collaborative Infantile Spasms Study (ICISS) found that using a combination of vigabatrin and hormonal therapy was more effective than hormonal therapy alone in treating infantile spasms during the first 14 to 42 days of treatment.* -
  • The follow-up study aimed to determine if this combination therapy also led to better developmental and epilepsy outcomes for infants at 18 months of age.* -
  • The trial involved multiple hospitals across several countries, using a randomized controlled design to compare therapies, and assessed outcomes using measures such as the Vineland Adaptive Behaviour Scales and seizure frequency.*
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Central pontine myelinolysis (CPM) is a neurological demyelinating disease of the pons. Although usually associated with rapid correction of hyponatremia, CPM may occur despite normonatremia, is often associated with chronic alcoholism and may be asymptomatic. Histological confirmation of asymptomatic CPM is rare.

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Article Synopsis
  • Infantile spasms is a severe epilepsy syndrome in infants, often hard to treat, with hormonal therapy and vigabatrin being common treatments.
  • A trial involving 102 hospitals aimed to determine if combining hormonal therapy with vigabatrin was more effective than hormonal therapy alone in treating this condition.
  • The study enrolled 766 infants, with 377 randomly assigned to receive either the combined treatment or hormonal therapy alone, measuring the primary outcome of cessation of spasms over a designated period.
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A previously well 16-year-old boy developed a rapid-onset hypokinetic syndrome, coupled with a radiological appearance of extensive and highly symmetrical basal ganglia and white matter change. The diagnostic process was challenging and we systematically considered potential causes. After excluding common causes of this clinico-radiological picture, we considered common disorders with this unusual radiological picture and vice versa, before finally concluding that this was a rare presentation of a rare disease.

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Aim: To determine the aetiological associations, neurological sequelae and role of magnetic resonance imaging (MRI) in term newborn infants with seizures.

Methods: Cohort study of infants ≥37 weeks' gestation delivered in a tertiary level centre, prospectively identified and followed longitudinally for 18-24 months.

Results: An underlying aetiology was found in 95% of the 77 infants identified with seizures (3.

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Article Synopsis
  • The study investigated the connection between movement disorders, brain MRI changes, and vigabatrin therapy in children with infantile spasms.
  • Out of 124 infants reviewed, 10 developed a movement disorder while on vigabatrin, with varying responses to dosage adjustments.
  • The findings suggest that while vigabatrin may be associated with movement disorders in some cases, the majority of infants did not experience these issues, and MRI changes linked to vigabatrin do not specifically correlate with movement disorders.
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Imaging in epilepsy.

Pract Neurol

August 2013

This is a review of the use of neuroimaging in epilepsy outlining the imaging strategy for new onset seizures and also those with intractable focal seizures being investigated as potential epilepsy surgery candidates. The review describes the radiological features of conditions which may be encountered in each clinical context, together with advice on the optimum imaging protocols to detect epileptogenic lesions. The review also presents the role of imaging in presurgical planning, the demonstration of eloquent function, grid placement and postoperative assessment.

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Over 800 000 people in the UK are demented. Alzheimer's disease, dementia with Lewy bodies, vascular dementia and frontotemporal lobar degeneration account for the majority. Although detailed clinical assessment forms the basis of evaluating a patient with cognitive impairment, structural and functional imaging techniques are increasingly being used.

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Several diverse neurological conditions may be seen during pregnancy and the post partum period. These usually require neuroimaging for definitive diagnosis and range from a predisposition to neurovascular abnormalities, such as acute ischaemic stroke and cerebral venous sinus thrombosis, through to more specific pregnancy-related conditions, such as eclampsia/posterior reversible leukoencephalopathy and post-partum angiopathy. Additionally, the pregnant patient is predisposed to pituitary disease.

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