A 4-year-old boy with newly diagnosed epilepsy has been started on levetiracetam. Two weeks later, his parents report he has become increasingly irritable, has frequent aggressive outbursts, and is having difficulty sleeping. His seizures are well controlled. What is the most appropriate management?
Q142
A 14-year-old girl with type 1 diabetes presents with a 6-month history of worsening glycaemic control. Her HbA1c has risen from 58 mmol/mol to 89 mmol/mol. She reports abdominal pain after meals and has lost 3kg in weight. Blood glucose readings show unexplained hyperglycaemia despite apparently appropriate insulin doses. Coeliac serology is negative. What is the most likely explanation for her deteriorating control?
Q143
A 6-year-old boy experiences his first unprovoked generalized tonic-clonic seizure lasting 3 minutes with full recovery. His developmental history is normal, neurological examination is unremarkable, and MRI brain shows no abnormalities. His EEG demonstrates generalized 3Hz spike-wave discharges. What is the most appropriate next step in management?
Q144
A 9-year-old girl with type 1 diabetes for 4 years has an HbA1c consistently between 75-85 mmol/mol despite multiple clinic visits. Her parents report she often forgets her lunchtime insulin at school and sometimes refuses injections. She has begun expressing that she wants to be 'normal like her friends'. What is the most appropriate initial approach to improve her diabetes management?
Q145
An 11-year-old boy with refractory focal epilepsy is being considered for epilepsy surgery. His seizures originate from the left temporal lobe according to video-EEG telemetry. Which of the following investigations is most essential in the pre-surgical evaluation to assess language lateralization?
Q146
A 5-year-old boy with type 1 diabetes is found to have a blood glucose of 2.8 mmol/L during a routine pre-lunch check at school. He is alert, able to swallow, and complaining of feeling 'wobbly'. According to current UK guidelines, what is the most appropriate immediate management?
Q147
A 7-year-old girl with epilepsy is started on carbamazepine for focal seizures with impaired awareness. Her mother asks about potential side effects. Which of the following is the most common dose-related side effect of carbamazepine in children?
Q148
A 13-year-old boy with type 1 diabetes mellitus presents to the emergency department with a 24-hour history of vomiting, abdominal pain, and increasing confusion. His blood glucose is 28 mmol/L, pH 7.15, bicarbonate 10 mmol/L, and urinary ketones are 4+. He is commenced on an intravenous insulin infusion and fluid resuscitation. Four hours into treatment, he suddenly develops a severe headache and becomes bradycardic with decreasing level of consciousness. What is the most likely complication that has occurred?
Q149
A 16-year-old girl with type 1 diabetes for 5 years presents for transition planning to adult services. Her current HbA1c is 72 mmol/mol, and she has background diabetic retinopathy detected at recent screening. She is on a basal-bolus insulin regimen. During the consultation, she discloses that she is sexually active and not using contraception. Her periods are regular. When counselling about pregnancy planning in type 1 diabetes, which target HbA1c should be achieved before conception to minimize the risk of congenital malformations?
Q150
An 8-year-old boy with a 3-year history of epilepsy controlled on sodium valproate presents with a 2-week history of increasing tremor, unsteady gait, and drowsiness. His seizures remain well controlled with no recent changes to his medication. Blood tests show: sodium 138 mmol/L, potassium 4.2 mmol/L, urea 5.2 mmol/L, creatinine 55 μmol/L, ammonia 145 μmol/L (normal <50), ALT 180 U/L, AST 165 U/L, and albumin 38 g/L. What is the most likely diagnosis?
Chronic Paediatric Conditions UK Medical PG Practice Questions and MCQs
Question 141: A 4-year-old boy with newly diagnosed epilepsy has been started on levetiracetam. Two weeks later, his parents report he has become increasingly irritable, has frequent aggressive outbursts, and is having difficulty sleeping. His seizures are well controlled. What is the most appropriate management?
A. Switch to an alternative antiepileptic medication (Correct Answer)
B. Add a short course of melatonin for sleep
C. Reduce the dose of levetiracetam
D. Continue current treatment and review in 6 weeks
E. Add risperidone for behavioural control
Explanation: ***Switch to an alternative antiepileptic medication***- **Levetiracetam** is well-known for causing **behavioral side effects**, including irritability, aggression, and hyperactivity (often termed "Leva-rage"), particularly in children.- When behavioral changes are clinically significant or distressing, the standard management is to **discontinue the drug** and switch to an alternative like **sodium valproate** or **lamotrigine**.*Add a short course of melatonin for sleep*- This addresses the **insomnia** but fails to manage the primary issue of **aggression and irritability** caused by the medication.- Adding more drugs increases the risk of **polypharmacy** and drug interactions instead of removing the causative agent.*Reduce the dose of levetiracetam*- While dose reduction may sometimes mitigate side effects, it often fails to resolve **idiosyncratic behavioral reactions** and risks **breakthrough seizures**.- Switching to another drug is a safer long-term strategy for maintaining both **seizure control** and a stable mood.*Continue current treatment and review in 6 weeks*- Behavioral side effects of levetiracetam often persist or worsen over time and rarely show **tachyphylaxis** (the body adjusting to the drug).- Delaying action for 6 weeks is inappropriate given the risk of **physical aggression** and the impact on the child's quality of life.*Add risperidone for behavioural control*- Using an **antipsychotic** to treat a drug-induced behavioral side effect is poor practice and exposes the child to **metabolic** and **extrapyramidal** risks.- The most logical step is to remove the **offending stimulus** (levetiracetam) rather than adding a potent psychotropic medication.
Question 142: A 14-year-old girl with type 1 diabetes presents with a 6-month history of worsening glycaemic control. Her HbA1c has risen from 58 mmol/mol to 89 mmol/mol. She reports abdominal pain after meals and has lost 3kg in weight. Blood glucose readings show unexplained hyperglycaemia despite apparently appropriate insulin doses. Coeliac serology is negative. What is the most likely explanation for her deteriorating control?
A. Insulin omission and disordered eating behaviour (Correct Answer)
B. Thyroid dysfunction
C. Mauriac syndrome
D. Dawn phenomenon
E. Lipohypertrophy at injection sites
Explanation: ***Insulin omission and disordered eating behaviour***- Often termed **diabulimia**, this involves intentionally skipping insulin to induce **glucosuria** and weight loss, typically seen in adolescent females.- The combination of **unexplained hyperglycaemia**, significant **weight loss**, and abdominal pain (due to recurrent **ketosis**) is highly characteristic of this dangerous behavior.*Thyroid dysfunction*- While **Autoimmune Thyroid Disease** is associated with Type 1 Diabetes, hyperthyroidism usually presents with a **goitre** or palpitations rather than pure glycaemic instability.- Screening is performed annually, but it does not typically explain the discrepancy between **reported insulin doses** and high glucose levels seen here.*Mauriac syndrome*- This is a rare complication of chronic poor glycaemic control characterized by **hepatomegaly**, **growth failure**, and **delayed puberty**.- While it involves poor control, it presents with a **cushingoid appearance** rather than acute weight loss in a previously well-growing adolescent.*Dawn phenomenon*- This refers to a physiological rise in blood glucose in the **early morning hours** (usually 4 am to 8 am) due to the surge of **counter-regulatory hormones** like growth hormone.- It would not explain **weight loss**, abdominal pain, or consistently elevated **HbA1c** levels throughout the entire day.*Lipohypertrophy at injection sites*- This occurs due to repeated injections in the same site, leading to **erratic insulin absorption** and unpredictable blood glucose fluctuations.- While it causes poor control, it would not explain the intentional **weight loss** and systemic symptoms like chronic abdominal pain.
Question 143: A 6-year-old boy experiences his first unprovoked generalized tonic-clonic seizure lasting 3 minutes with full recovery. His developmental history is normal, neurological examination is unremarkable, and MRI brain shows no abnormalities. His EEG demonstrates generalized 3Hz spike-wave discharges. What is the most appropriate next step in management?
A. Commence sodium valproate and discuss risk-benefit ratio with parents (Correct Answer)
B. Reassure parents that no treatment is needed after a single seizure
C. Start levetiracetam immediately
D. Arrange genetic testing for channelopathies
E. Commence carbamazepine for seizure prophylaxis
Explanation: ***Commence sodium valproate and discuss risk-benefit ratio with parents***
- The presence of **generalized 3Hz spike-wave discharges** on EEG in a child with a generalized tonic-clonic seizure is pathognomonic for a **Genetic Generalized Epilepsy (GGE)** syndrome, necessitating treatment even after a first seizure due to high recurrence risk.
- **Sodium valproate** is a first-line, broad-spectrum antiepileptic drug for males with generalized epilepsy syndromes, effectively managing both tonic-clonic and potential absence seizures, with a crucial **risk-benefit discussion** regarding its side effects.
*Reassure parents that no treatment is needed after a single seizure*
- While observation can be an option for an isolated seizure with a normal EEG, the definitive **epileptiform activity (3Hz spike-wave)** indicates a high risk of future seizures and warrants intervention.
- Current guidelines recommend initiating treatment after a first seizure if there is clear evidence of an underlying **epileptic syndrome**, as seen with this characteristic EEG finding.
*Start levetiracetam immediately*
- Although **levetiracetam** is an effective broad-spectrum antiepileptic, **sodium valproate** is often preferred as a first-line agent in classic **primary generalized epilepsies** due to its established efficacy against various seizure types within these syndromes.
- Starting any antiepileptic drug requires a thorough **discussion** with parents about the diagnosis, chronic nature of treatment, and potential side effects, which
Question 144: A 9-year-old girl with type 1 diabetes for 4 years has an HbA1c consistently between 75-85 mmol/mol despite multiple clinic visits. Her parents report she often forgets her lunchtime insulin at school and sometimes refuses injections. She has begun expressing that she wants to be 'normal like her friends'. What is the most appropriate initial approach to improve her diabetes management?
A. Arrange formal psychological assessment and family therapy (Correct Answer)
B. Switch to an insulin pump to reduce injection burden
C. Increase insulin doses to compensate for missed injections
D. Implement a behaviour reward chart with prizes for compliance
E. Refer to social services for safeguarding assessment
Explanation: ***Arrange formal psychological assessment and family therapy***
- The patient's behaviors, such as forgetting insulin and refusing injections, coupled with expressing a desire to be 'normal like her friends', strongly indicate **diabetes distress** and underlying **psychological resistance** to managing her chronic condition.
- Formal psychological assessment will identify specific emotional burdens or coping difficulties, while **family therapy** can address family dynamics, communication, and support systems critical for long-term adherence and well-being in pediatric diabetes.
*Switch to an insulin pump to reduce injection burden*
- While an insulin pump can reduce the frequency of injections, it demands significant **patient and family engagement** and adherence to thrive; without addressing the underlying **psychological barriers**, the patient may still struggle with pump management or refusal.
- Introducing advanced technology without first resolving the **emotional distress** and non-adherence issues may lead to frustration and further disengagement rather than improved control.
*Increase insulin doses to compensate for missed injections*
- Increasing insulin doses without ensuring consistent administration is a **dangerous approach** that significantly increases the risk of **severe hypoglycemia** if the child eventually takes the full, adjusted dose.
- This strategy does not address the root cause of missed doses and can lead to **unpredictable glycemic control** and greater health risks.
*Implement a behaviour reward chart with prizes for compliance*
- For a 9-year-old experiencing significant **identity-related distress** and resistance to lifelong treatment, a simple reward chart is often insufficient to address the complex emotional and psychological challenges.
- This approach focuses on external motivators rather than exploring and resolving the **internal conflict** and distress, which is crucial for sustainable self-management in chronic conditions.
*Refer to social services for safeguarding assessment*
- A safeguarding referral is **premature** as the parents are actively reporting the issues and seeking help, indicating concern rather than neglect; the primary issue appears to be the child's struggle with coping and adherence.
- The initial and most appropriate step is to provide **multidisciplinary support** and psychological intervention to the child and family, as this is a common challenge in managing pediatric chronic illnesses.
Question 145: An 11-year-old boy with refractory focal epilepsy is being considered for epilepsy surgery. His seizures originate from the left temporal lobe according to video-EEG telemetry. Which of the following investigations is most essential in the pre-surgical evaluation to assess language lateralization?
A. Functional MRI (Correct Answer)
B. Wada test (intracarotid amobarbital procedure)
C. Neuropsychological testing
D. High-resolution structural MRI
E. Magnetoencephalography
Explanation: ***Functional MRI***- **Functional MRI (fMRI)** is the standard non-invasive tool used to determine **language lateralization** by measuring Blood Oxygen Level Dependent (BOLD) signals during linguistic tasks.- In pediatric patients, it has largely replaced more invasive procedures due to its safety profile and high reliability in identifying **hemispheric dominance**.*Wada test (intracarotid amobarbital procedure)*- Historically the gold standard, the **Wada test** is highly invasive, requiring **arterial catheterization** and sedation which carries higher risks for children.- It is currently reserved as a second-line investigation for cases where **fMRI results** are inconclusive or when patient cooperation is limited.*Neuropsychological testing*- This provides an essential baseline for **cognitive function**, memory, and IQ, but it cannot definitively **localize or lateralize** specific language centers.- While it helps predict surgical outcomes, it does not provide the **functional mapping** required to guide surgical boundaries.*High-resolution structural MRI*- **Structural MRI** is vital for identifying anatomical lesions like **hippocampal sclerosis** or cortical dysplasia that cause epilepsy.- It provides no information regarding **brain function** or the lateralization of language cortex.*Magnetoencephalography*- **Magnetoencephalography (MEG)** is primarily used to localize the **epileptogenic zone** and magnetic dipoles associated with interictal spikes.- While it can provide some functional data, it is significantly less specific and less commonly utilized for **language dominance** mapping compared to fMRI.
Question 146: A 5-year-old boy with type 1 diabetes is found to have a blood glucose of 2.8 mmol/L during a routine pre-lunch check at school. He is alert, able to swallow, and complaining of feeling 'wobbly'. According to current UK guidelines, what is the most appropriate immediate management?
A. Give 15g fast-acting carbohydrate orally followed by a long-acting carbohydrate snack (Correct Answer)
B. Administer intramuscular glucagon immediately
C. Give 150ml of fruit juice and recheck glucose in 30 minutes
D. Call emergency services and keep nil by mouth
E. Give a chocolate bar and continue with normal activities
Explanation: ***Give 15g fast-acting carbohydrate orally followed by a long-acting carbohydrate snack***
- For a conscious child with **hypoglycaemia** (glucose <4 mmol/L) who is able to swallow, **15g of fast-acting carbohydrate** is the first-line treatment to rapidly raise blood glucose.
- Following this with a **long-acting carbohydrate snack** (like a cereal bar or bread) is necessary to maintain stable glucose levels and prevent a secondary drop.
*Administer intramuscular glucagon immediately*
- **Intramuscular glucagon** is reserved for **severe hypoglycaemia** where the patient is unconscious, fitting, or unable to swallow safely.
- This patient is alert and **able to swallow**, making oral treatment the safer and more appropriate initial step.
*Give 150ml of fruit juice and recheck glucose in 30 minutes*
- While fruit juice is a good fast-acting source, the glucose should be rechecked in **10–15 minutes**, not 30 minutes, to ensure levels are rising.
- Waiting **30 minutes** is too long and risks the patient's condition deteriorating if the initial treatment was insufficient.
*Call emergency services and keep nil by mouth*
- **Emergency services** are generally not required for mild, manageable hypoglycaemia that responds to oral glucose in a school setting.
- Keeping the patient **nil by mouth** is contraindicated when they are conscious and need oral sugar to correct a dangerously low glucose level.
*Give a chocolate bar and continue with normal activities*
- **Chocolate** is inappropriate for acute management because its high **fat content** slows down the absorption of sugar into the bloodstream.
- Activities should be paused until the blood glucose is confirmed to be **above 4 mmol/L** and the child feels well again.
Question 147: A 7-year-old girl with epilepsy is started on carbamazepine for focal seizures with impaired awareness. Her mother asks about potential side effects. Which of the following is the most common dose-related side effect of carbamazepine in children?
A. Ataxia and drowsiness (Correct Answer)
B. Hyponatraemia
C. Aplastic anaemia
D. Stevens-Johnson syndrome
E. Hepatotoxicity
Explanation: ***Ataxia and drowsiness***
- These are the most frequent **dose-related** adverse effects of carbamazepine, often occurring during the **initiation phase** or when titrating the dose upward.
- These symptoms typically resolve with a reduction in dosage or by establishing a slower **titration schedule** to reach the maintenance dose.
*Hyponatraemia*
- This occurs due to the **SIADH** (Syndrome of Inappropriate Antidiuretic Hormone) effect of carbamazepine, but it is less common in children than in the elderly.
- When it does occur, it is often **asymptomatic** and is detected incidentally on routine electrolyte panels.
*Aplastic anaemia*
- This is a rare, **idiosyncratic** reaction rather than a dose-dependent side effect, requiring immediate cessation of the drug.
- While mild **leukopenia** is common and benign, true aplastic anemia is extremely infrequent but life-threatening.
*Stevens-Johnson syndrome*
- This is a severe, life-threatening **cutaneous hypersensitivity** reaction that is not related to the drug dosage.
- Risk is significantly increased in patients matching the **HLA-B*1502 allele**, particularly in those of East Asian and South Asian descent.
*Hepatotoxicity*
- This is an **idiosyncratic reaction** that can range from a mild increase in liver enzymes to acute liver failure.
- It is not a common dose-related effect; monitoring **liver function tests** is recommended primarily to catch early signs of hypersensitivity.
Question 148: A 13-year-old boy with type 1 diabetes mellitus presents to the emergency department with a 24-hour history of vomiting, abdominal pain, and increasing confusion. His blood glucose is 28 mmol/L, pH 7.15, bicarbonate 10 mmol/L, and urinary ketones are 4+. He is commenced on an intravenous insulin infusion and fluid resuscitation. Four hours into treatment, he suddenly develops a severe headache and becomes bradycardic with decreasing level of consciousness. What is the most likely complication that has occurred?
A. Cerebral oedema (Correct Answer)
B. Hypoglycaemia
C. Intracerebral haemorrhage
D. Meningitis
E. Posterior reversible encephalopathy syndrome
Explanation: ***Cerebral oedema***- The sudden onset of **severe headache**, **bradycardia**, and decreasing level of consciousness during DKA treatment are classic signs of **increased intracranial pressure**, highly indicative of **cerebral oedema**.- Rapid fluid resuscitation and insulin administration can lead to an abrupt fall in **serum osmolality**, causing water to shift into brain cells and result in brain swelling, particularly in children.*Hypoglycaemia*- While a potential complication of insulin therapy, **hypoglycaemia** typically manifests with symptoms like sweating, tremors, and **tachycardia**, not the signs of increased intracranial pressure (headache, bradycardia, altered consciousness) observed here.- The patient's initial blood glucose was extremely high (28 mmol/L), and although glucose will fall, these severe neurological symptoms with bradycardia point to a different, more acute complication.*Intracerebral haemorrhage*- **Intracerebral haemorrhage** usually presents with acute onset **focal neurological deficits** (e.g., hemiparesis, specific visual field loss), rather than the generalized signs of increasing intracranial pressure described.- Although DKA can be a **prothrombotic state**, haemorrhage is a significantly rarer complication in pediatric DKA management compared to cerebral oedema, and the clinical picture does not fit typical haemorrhage.*Meningitis*- **Meningitis** is an infectious process that would typically present with **fever**, **neck stiffness**, and often a characteristic rash, none of which are reported in this patient's history.- The acute deterioration occurring specifically 4 hours into DKA treatment strongly suggests a **treatment-related complication** rather than an underlying acute infection.*Posterior reversible encephalopathy syndrome*- **PRES** is characterized by symptoms such as headache, visual disturbances, seizures, and altered mental status, often associated with **severe hypertension** or renal disease.- While it involves oedema, its typical radiological findings are distinct (vasogenic oedema in posterior circulation), and the clinical context of DKA treatment makes cerebral oedema a far more common and direct complication.
Question 149: A 16-year-old girl with type 1 diabetes for 5 years presents for transition planning to adult services. Her current HbA1c is 72 mmol/mol, and she has background diabetic retinopathy detected at recent screening. She is on a basal-bolus insulin regimen. During the consultation, she discloses that she is sexually active and not using contraception. Her periods are regular. When counselling about pregnancy planning in type 1 diabetes, which target HbA1c should be achieved before conception to minimize the risk of congenital malformations?
A. Less than 36 mmol/mol (5.5%)
B. Less than 48 mmol/mol (6.5%) (Correct Answer)
C. Less than 53 mmol/mol (7.0%)
D. Less than 58 mmol/mol (7.5%)
E. Less than 64 mmol/mol (8.0%)
Explanation: ***Less than 48 mmol/mol (6.5%)***
- For women with pre-existing diabetes planning pregnancy, **NICE guidelines** recommend aiming for an HbA1c below **48 mmol/mol (6.5%)** to significantly reduce the risk of **congenital malformations**.
- This target is specifically aimed at balancing optimal **glycaemic control** against the risk of **hypoglycaemia** during the critical period of **organogenesis** (weeks 5-8).
*Less than 36 mmol/mol (5.5%)*
- This target is excessively low and is not recommended as it carries an extremely high risk of **severe hypoglycaemia**.
- Standard clinical goals focus on reaching the **lowest possible level** safely, typically not exceeding the 6.5% threshold.
*Less than 53 mmol/mol (7.0%)*
- While 7.0% is often a standard target for general diabetes management, it is **suboptimal** for the pre-conception period.
- Research shows that an HbA1c above 6.5% correlates with an increased risk of **fetal abnormalities** and miscarriage.
*Less than 58 mmol/mol (7.5%)*
- This level indicates **inadequate control** for pregnancy planning and is associated with a 2-4 fold increase in the risk of **major malformations**.
- Patients with this level are advised to use **effective contraception** until their glucose levels are brought closer to the 6.5% target.
*Less than 64 mmol/mol (8.0%)*
- An HbA1c of 8.0% or higher is considered high-risk and is strongly linked to **adverse pregnancy outcomes**.
- Screening for and managing **diabetic retinopathy** is even more critical when HbA1c is high, as rapid tightening of control can temporarily worsen eye disease.
Question 150: An 8-year-old boy with a 3-year history of epilepsy controlled on sodium valproate presents with a 2-week history of increasing tremor, unsteady gait, and drowsiness. His seizures remain well controlled with no recent changes to his medication. Blood tests show: sodium 138 mmol/L, potassium 4.2 mmol/L, urea 5.2 mmol/L, creatinine 55 μmol/L, ammonia 145 μmol/L (normal <50), ALT 180 U/L, AST 165 U/L, and albumin 38 g/L. What is the most likely diagnosis?
A. Acute liver failure secondary to valproate hepatotoxicity
B. Progression of underlying neurometabolic disorder
C. Viral encephalitis with concurrent hepatitis
D. Valproate-induced hyperammonaemic encephalopathy (Correct Answer)
E. Phenytoin toxicity from drug interaction
Explanation: ***Valproate-induced hyperammonaemic encephalopathy***- This condition is characterized by neurological deterioration (tremor, unsteady gait, drowsiness) and significantly **elevated ammonia levels** in a patient on **sodium valproate**.- It can occur with **normal or mildly elevated transaminases** and often involves valproate's interference with the **urea cycle**, leading to ammonia accumulation without severe hepatocyte damage.*Acute liver failure secondary to valproate hepatotoxicity*- Acute liver failure would typically present with **markedly higher transaminases** (often >1000 U/L) and clear evidence of **synthetic hepatic dysfunction**, such as a coagulopathy or profound hypoalbuminemia.- In this case, the patient’s **albumin is normal** (38 g/L) and transaminases are only mildly raised, which does not support a diagnosis of acute liver failure.*Progression of underlying neurometabolic disorder*- While valproate can sometimes exacerbate underlying **urea cycle defects**, a sudden 2-week decline after 3 years of stability points more towards a drug-induced complication rather than a progressive disorder.- The immediate and strong association of **hyperammonemia** with **valproate therapy** makes it the more direct and likely cause for the acute symptoms.*Viral encephalitis with concurrent hepatitis*- Viral encephalitis typically presents with a more **acute onset**, often with **fever**, and distinct CSF findings not observed here.- While it can cause drowsiness and elevated liver enzymes, it would not specifically explain the **isolated and marked hyperammonemia** seen in this patient.*Phenytoin toxicity from drug interaction*- There is no mention of the patient taking **phenytoin**; he is on **sodium valproate** monotherapy, making phenytoin toxicity irrelevant.- **Phenytoin toxicity** primarily causes cerebellar symptoms like **nystagmus and ataxia** but does not lead to **hyperammonemia**.
