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NEUROLOGICAL DISORDERS
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HEDACHE Frequent reason for older children and adolescents to consult a doctor (International Headache Society) Primary Migraine Tension-type headache Cluster headache Secondary Head or neck trauma, Cranial or cervical vascular disorder Vascular malformation or intracranial hemorrhage Non-vascular intracranial disorder Raised intracranial pressure, idiopathic intracranial hypertension-alcohol, solvent, drug abuse-infection Meningitis, encephalitis-hypercapnia, hypertension-acute sinusitis-psychiatric disorder
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TENSION-TYPE HEADACHE
Symmetrical headache of gradual onset Described as tightness, a band or pressure Usually no other symptoms
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MIGRAINE WITHOUT AURA 90% of migraine children episodes may last 1-72h
Bilateral or unilateral Pulsatile – temporal or frontal area Accompanied – nausea, vomiting, abdominal pain, photophobia
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MIGRAINE WITH AURA 10% of migraine Headache is preceded by an aura (visual, sensory, motor) Last for a few hours, during which time children prefer to lie down in a quiet, dark place
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TRIGGERS Stress Food Menstruation Emotional Or Behavioral Problems
Alcohol, Drugs
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HEADACHES OFTEN RAISE THE FEAR OF BRAIN TUMOURS
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RED FLAG SYMPTOMS Headache:
Worse lying down or with coughing and straining headache Wakes up child associated confusion, morning or persistent nausea or vomiting recent change in personality, behavior or educational performance.
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RED FLAG PHYSICAL SIGNS (SPACE-OCCUPYING LESION)
Growth failure visual field defects: Craniopharyngioma squint cranial nerve Abnormality torticollis Abnormal coordination For cerebellar signs Papilledema of the second cranial nerve Bradycardia cranial bruits Arteriovenous malformation
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RESCUE TREATMENTS Paracetamol and non-steroidal anti-inflammatory drugs (NSAIDs) Anti-emetics serotonin agonists: Sumatriptanbeta-blockers Propranolol Psychological Support relaxation
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SEIZURES Is a clinical event in which there is a sudden disturbance of neurological function caused by an abnormal or excessive neuronal discharge. May by epileptic or non-epileptic.
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NON-EPILEPTIC Febrile seizures Metabolic Hypoglycemia Hypocalcaemia
Hypomagnesaemia Hypo/Hypernatremia Head Trauma Meningitis / Encephalitis Poisons / toxins
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EPILEPSY Idiopathic (70-80%) cause unknown but presumed genetic
Cerebral dysgenessia/malformation Cerebral Vasular Occlusion Cerebral damage: Congenital infection, Hypoxic-ischemic encephalopathy, Intraventricular hemorrhage Cerebral tumor Neurodegenerative disorders Neuro cutaneous syndromes
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FEBRILE SEIZURES Affect 3% of children Have a genetic predisposition
Occur between 6 months and 6 years of age Are usually brief, generalized tonic-clonic seizures occurring with a rapid rise in fever If a bacterial infection, especially meningitis, is present, it needs to be identified and treated Advise family about management of seizures, consider rescue therapy Rectal diazepam Oral prophylactic anti-epileptic drugs are not used An EEG is not indicated If simple – does not affect intellectual performance or risk of developing epilepsy If complex, 4-12% risk of subsequent epilepsy
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CHILDREN WITH PAROXYSAML DISORDERS
Breath-holding attacks – temper reflex anoxic seizures Head trauma Cold food Fright Fever syncope migraine Benign proximal vertigo Other causes (cardiac arrhythmia, ticks, pseudo seizures)
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EPILEPSIES OF CHILDHOOD
Is a chronic neurological disorder characterised by recurrent unprovoked seizures, consisting of transient signs and/or symptoms associated with abnormal, excessive or synchronous neuronal activity in the brain.
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GENERALISED SEIZURES There is always a loss o consciousness No warning
Symmetrical seizures Bilaterally synchronous seizures Discharge on EEG or varying asymmetry
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ABSENCE SEIZURES
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MYOCLONIC SEIZURES
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TONIC SEIZURES
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TONIC-CLONIC SEIZURES
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ATONIC SEIZURES
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FOCAL SEIZURES Onset in neural network limited to one cerebral hemisphere. Begin in relative small group of dysfunctional neurons in one of the cerebral hemispheres May be heralded by an aura which reflects the site of origin May or may not be associated with change in consciousness or more generalized tonic-clonic seizure
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FOCAL SEIZURES Frontal seizures Motor phenomena temporal lobe seizures
Auditory or sensory (smell or taste) phenomena occipital Positive or negative visual phenomena parietal lobe seizures Contralateral altered sensation (dysaesthesia)
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INVESTIGATION OF SEIZURES
Many children with epilepsy have a normal initial EEG And many children who will never have epilepsy have EEG abnormalities EEG is just a supportive evidence
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ANTI-EPILEPTIC DRUG THERAPY (AED)
It is common practice not to institute treatment after a single unprovoked seizure Not all seizures require AED therapy The decision should be based on the seizure type, frequency and social and educational consequences of seizures set against the possibility of unwanted effects of the drug All AEDs have potential unwanted effects
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COMMON AEDs Valproate Carbamazepine/Oxcarbazepine Vigabatrin
Lamotrigine Ethosuximide Topiramate Gabapentin Levetriacetam Clonazepam, Diazepam
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SPINAL MUSCULAR ATROPHY TYPE 1 WERDNIG-HOFFMANN DISEASE
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ACUTE POST-INFECTIOUS POLYNEUROPATHY GUILLAIN-BARRE SYNDROME
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MYASTHEMIA GRAVIS
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DUCHENNE MUSCULAR DYSTROPHY
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FRIEDRICH ATAXIA
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ATAXIA TELAGIECTASIA This disorder of DNA repair
ARGene ATM has been identified Mild delay in motor development in infancy Oculomotor problems Difficulty with balance and coordination becoming evident at school age Deterioration with a mixture of dystonia and cerebellar signs Many children require a wheelchair Telangiectasia develops in the conjunctiva, neck and shoulders Increased susceptibility to infection Malignant disorders – ALL
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CEREBELLAR ATAXIA Causes – medication, drugs, varicella infection, posterior fossa lesion or tumors, genetic and degenerative disorders e.g friedrich ataxia and ataxia telangiectasia
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EXTRADURAL HAEMORRHAGE
Head trauma Skull fracture Arterial or venous bleeding into the extradural space Lucid interval until the conscious level deteriorates, with seizures Focal neurological signs Dilatation of the ipsilateral pupil Paresis of the contralateral limps Arrest of the bleeding
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SUBDURAL HAEMATOMA This is results from tearing of the veins as they cross the subdural space Subdural hematoma and retinal hemorrhages in an infant – consider non-accidental injury caused by shaking or direct trauma
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SUBARACHNOID HAEMORRHAGE
Much more common in adults Acute onset of headpain Neck stiffness Occasionally fever CT scan – blood in CSF The cause is often an aneurysm or AVMMR angiography, CT or convetional angiography
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NEURAL TUBE DEFECTS ANENCEPHALY
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ANENCEPHALY
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NEURAL TUBE DEFECTS
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SPINA BIFIDA OCCULTA
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HYDROCEPHALUS SETTING-SUN SIGN
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VENTRICULOPERITONELA SHUNT FOR DRAINAGE
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NEUROCUTANEUS SYNDROMES
NEUROFIBROMATOSIS TUBEROUS SCLEROSISS TRUGE-WEBER SYNDROME
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NF1 This affects 1 in 3000 live births AD or new mutation
6 or more cafe-au-lait spots > 5mm in size before puberty, >15mm after puberty More than one neurofibroma Axillary freckles Optic Glioma Lisch nodule, a hamartoma of the iris (slit-lamp examination) Bony lesions from sphenoid dysplasia A first degree relative with NF1
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NF
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TUBEROUS SCLEROSIS The cutaneous features consist of:
Depigmented ash leaf Shaped patches Shagreen patches angiofibromatic neurological features Infantile spasm and developmental delay Epilepsy
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TUBEROUS SCLEROSIS
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STURGE-WEBER SYNDROME
Sporadic disorder with a haemangiomatous facial lesion (a port-wine stain) in the distribution of the trigeminal nerve associated with a similar lesion intracranially.
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CAUSES OF FLOPPY INFANT
Cortical Hypoxic-ischemic encephalopathy Genetic Down syndrome Prader-willi syndrome Metabolic Hypothyroidism Hypocalcaemia Neuromuscular Spinal muscular atrophy Myopathy Myotonia Congenital myasthenia
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NEURODEGENERATIVE DISORDERS
Tay-Sachs disease Gaucher disease Niemann pick disease Mucopolysaccharidosis MPS1 = Hurler MPS2 = Hunter MPS3 = Sanfilippo MPS4 = Morquio MPS4 = Maroteaux-Lamy
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TAY-SACHS DISEASE Enzyme defect – Hexosaminidase are disorder
Most common among Ashkenazis Jews Develop mental Regression in late infancy Severe hypotonia, enlarging head Cherry red spot at the macula Death by 2-5 years Diagnosis measurement of the specific enzyme activity Prenatal detection is possible in high-risk couples
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TAY-SACHS DISEASE
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GAUCHER DISEASE Enzyme defect:
Beta – Glucosidase occurs in 1 in 500 Ashkenazi's jaws Chronic childhood form: Splenomegaly, bone marrow suppression, bone involvement, normal enzyme replacement therapy is available Acute infantile form: Splenomegaly, neurological degeneration with seizures
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GAUCHER DISEASE
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CLINICAL FEATURES OF MUCOPOLYSACCHARIDOSES
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CLINICAL FEATURES OF MUCOPOLYSACCHARIDOSES
Corneal clouding, retinal degeneration, glaucoma Thickened skin Valvular lesion, cardiac failure Developmental regression Thickened skull, broad ribs, thoracic kyphosis, lumbar lordosis Hepato-splenomegaly Conductive deafness Umbilical and inguinal hernias
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NIEMANN-PICK DISEASE Enzyme defect:
Sphingomyelinase at 3-4 months, feeding difficulties, hepatosplenomegaly, developmental delay, hypotonic and deterioration of hearing and vision cherry red spot in macula affect 50%
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NIEMANN-PICK DISEASE
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WILSON DISEASE From the accumulation of copper, may cause changes in behavior and additional involuntary movements or a mixture of neurological and hepatic symptoms.
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