Chronic Paediatric Conditions — MCQs
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A 13-year-old girl with type 1 diabetes for 4 years presents with unexplained recurrent severe hypoglycaemic episodes requiring paramedic attendance. Her HbA1c has dropped from 65 mmol/mol to 42 mmol/mol over 6 months. Parents report finding hidden glucose testing strips showing readings of 2-3 mmol/L at various times. She is reluctant to discuss her diabetes management and appears distressed. What is the most likely underlying cause?
A 6-year-old boy with focal epilepsy controlled on levetiracetam for 2 years presents with increasing behavioural problems over 6 months. His parents report marked irritability, aggression, and emotional lability. Seizures remain well controlled. School reports deteriorating behaviour and peer relationships. What is the most appropriate management?
A 15-year-old boy with type 1 diabetes for 9 years presents for annual screening. Urinalysis shows microalbuminuria on two separate occasions (albumin:creatinine ratio 3.5 mg/mmol and 4.2 mg/mmol). Blood pressure is 128/78 mmHg (95th centile for age/height). HbA1c is 68 mmol/mol. Retinal screening shows no retinopathy. What is the most appropriate initial management?
A 10-year-old girl experiences her first seizure consisting of jerking movements of the right arm that remain localized, with preserved consciousness throughout the 90-second episode. She has no past medical history and developmental milestones were normal. Examination reveals no focal neurological deficit. What is the most appropriate next investigation?
A 7-year-old boy with newly diagnosed type 1 diabetes and his family are being educated about sick day management. During intercurrent illness, which of the following statements about insulin management is correct?
What is the minimum concentration of blood glucose that defines hypoglycaemia requiring treatment in a child with type 1 diabetes?
A 16-year-old girl with juvenile myoclonic epilepsy controlled on valproate presents requesting to switch medication as she is now sexually active. She has been seizure-free for 18 months. Which alternative medication would be most appropriate considering efficacy and her reproductive health?
A 12-year-old girl with type 1 diabetes presents to clinic. Her insulin pump shows frequent high glucose readings (15-22 mmol/L) at 3 AM over the past 2 weeks, followed by normal pre-breakfast readings (5-7 mmol/L). She reports no symptoms during the night. Her basal insulin rate was recently increased. What is the most likely explanation?
A 9-year-old boy with refractory epilepsy is being considered for ketogenic diet therapy. His seizures are poorly controlled despite trials of three anti-epileptic drugs. Which of the following seizure types would be the LEAST suitable indication for ketogenic diet?
A 14-year-old girl with type 1 diabetes for 7 years is admitted with severe DKA (pH 7.05, glucose 28 mmol/L, ketones 5.8 mmol/L). During initial treatment with IV fluids and insulin infusion, she becomes increasingly drowsy with bradycardia and develops a fixed dilated right pupil. What is the most appropriate immediate management?
Chronic Paediatric Conditions UK Medical PG Practice Questions and MCQs
Question 121: A 13-year-old girl with type 1 diabetes for 4 years presents with unexplained recurrent severe hypoglycaemic episodes requiring paramedic attendance. Her HbA1c has dropped from 65 mmol/mol to 42 mmol/mol over 6 months. Parents report finding hidden glucose testing strips showing readings of 2-3 mmol/L at various times. She is reluctant to discuss her diabetes management and appears distressed. What is the most likely underlying cause?
- A. Undiagnosed Addison's disease causing adrenal insufficiency
- B. Coeliac disease with malabsorption affecting carbohydrate absorption
- C. Factitious hypoglycaemia from insulin manipulation (Correct Answer)
- D. Unrecognized nocturnal hypoglycaemia with autonomic neuropathy
- E. Excessive exercise without appropriate carbohydrate adjustment
Explanation: ***Factitious hypoglycaemia from insulin manipulation***- The rapid improvement in **HbA1c**, discovery of hidden glucose strips, and **psychological distress** strongly suggest deliberate insulin overdosing rather than an organic medical cause.- This condition is often seen in adolescents as a manifestation of **psychological distress**, eating disorders, or a desire for attention, requiring **multidisciplinary support** involving psychology or CAMHS.*Undiagnosed Addison's disease causing adrenal insufficiency*- While **adrenal insufficiency** can cause hypoglycaemia in type 1 diabetes, it is typically accompanied by **hyperpigmentation**, hypotension, and salt craving.- It would not explain the patient's **secretive behavior** or the discovery of hidden testing strips with low readings.*Coeliac disease with malabsorption affecting carbohydrate absorption*- **Coeliac disease** is frequently associated with type 1 diabetes but usually presents with **growth failure**, bloating, or iron deficiency anemia.- Malabsorption generally leads to **unstable or high HbA1c** levels due to erratic absorption, rather than a dramatic, sustained drop in HbA1c.*Unrecognized nocturnal hypoglycaemia with autonomic neuropathy*- **Autonomic neuropathy** is exceedingly rare in the pediatric population, typically requiring over **10 years of poor glycemic control** to develop.- While nocturnal hypoglycemia can occur, it would not account for the **recurrent daytime paramedic attendances** or the psychological components described.*Excessive exercise without appropriate carbohydrate adjustment*- **Exercise-induced hypoglycaemia** follows physical activity and is usually managed easily once the pattern is identified and insulin/carbs are adjusted.- This diagnosis does not explain the **distress, reluctance to discuss management**, or the dramatic shift in overall **glycaemic control (HbA1c)**.
Question 122: A 6-year-old boy with focal epilepsy controlled on levetiracetam for 2 years presents with increasing behavioural problems over 6 months. His parents report marked irritability, aggression, and emotional lability. Seizures remain well controlled. School reports deteriorating behaviour and peer relationships. What is the most appropriate management?
- A. Add behavioural therapy and continue current medication
- B. Switch from levetiracetam to an alternative anti-epileptic drug (Correct Answer)
- C. Increase levetiracetam dose to improve seizure control
- D. Add risperidone for behavioural management
- E. Request child psychiatry assessment
Explanation: ***Switch from levetiracetam to an alternative anti-epileptic drug*** - **Levetiracetam** is well-known for causing **neuropsychiatric adverse effects** such as irritability, aggression, and emotional lability, particularly in pediatric patients, which aligns with the observed symptoms. - When significant **behavioral side effects** develop and impact a child's quality of life while seizures remain controlled, the most appropriate management is to switch to an alternative **anti-epileptic drug (AED)**. *Add behavioural therapy and continue current medication* - **Behavioral therapy** may be a supportive measure, but it will not address the primary cause of the behavioral problems, which is likely a medication side effect. - Continuing the **offending medication** while only adding therapy risks prolonging the child's distress and further exacerbating their social and academic difficulties. *Increase levetiracetam dose to improve seizure control* - The question explicitly states that the boy's **seizures remain well controlled**, meaning there is no clinical indication to increase the medication dose. - Increasing the dose of **levetiracetam** would likely worsen the already present **dose-dependent neuropsychiatric side effects** such as irritability and aggression. *Add risperidone for behavioural management* - Adding a **second-generation antipsychotic** like risperidone introduces additional medications and potential side effects to treat a condition that is likely **iatrogenic**. - The standard approach is to remove or replace the suspected **causative medication** before resorting to polypharmacy for drug-induced symptoms. *Request child psychiatry assessment* - While a child psychiatry assessment could be useful for complex behavioral issues, the clear **temporal association** between levetiracetam use and the onset of behavioral problems strongly suggests a drug side effect. - The initial and most direct intervention is for the prescribing **neurologist or pediatrician** to manage the anti-epileptic drug regimen, prior to specialized psychiatric referral.
Question 123: A 15-year-old boy with type 1 diabetes for 9 years presents for annual screening. Urinalysis shows microalbuminuria on two separate occasions (albumin:creatinine ratio 3.5 mg/mmol and 4.2 mg/mmol). Blood pressure is 128/78 mmHg (95th centile for age/height). HbA1c is 68 mmol/mol. Retinal screening shows no retinopathy. What is the most appropriate initial management?
- A. Reassure and repeat screening in 12 months
- B. Start ACE inhibitor therapy immediately
- C. Optimize glycaemic control and repeat albumin:creatinine ratio in 3 months (Correct Answer)
- D. Refer to paediatric nephrology for renal biopsy
- E. Start angiotensin receptor blocker and low-protein diet
Explanation: ***Optimize glycaemic control and repeat albumin:creatinine ratio in 3 months*** - Persistent **microalbuminuria** (ACR 3-30 mg/mmol) in type 1 diabetes, especially with an elevated **HbA1c** of 68 mmol/mol, initially warrants optimization of **glycaemic control**. - Improved glucose control can reverse early **hyperfiltration** and albumin leakage, necessitating a repeat **albumin:creatinine ratio** in 3 months to assess response before considering pharmacological intervention. *Reassure and repeat screening in 12 months* - Two consecutive abnormal **albumin:creatinine ratio** results indicate **persistent microalbuminuria**, a sign of early **diabetic nephropathy**, which is not a benign finding requiring reassurance. - Delaying re-evaluation for 12 months is inappropriate as prompt intervention, especially **glycaemic optimization**, is crucial to prevent progression of renal damage. *Start ACE inhibitor therapy immediately* - **ACE inhibitors** are typically initiated for persistent microalbuminuria or hypertension that doesn't resolve with **glycaemic control**, or if **blood pressure** is consistently above the 95th centile. - Given the poor **HbA1c**, the immediate priority is to first attempt **glycaemic optimization** to see if this reverses the early albuminuria. *Refer to paediatric nephrology for renal biopsy* - **Renal biopsy** is not typically indicated for the diagnosis of early **diabetic nephropathy** with isolated microalbuminuria in a patient with long-standing type 1 diabetes. - Biopsy is usually reserved for atypical presentations, such as rapid decline in renal function, absence of **retinopathy**, or active urinary sediment, which are not present here. *Start angiotensin receptor blocker and low-protein diet* - **Angiotensin receptor blockers (ARBs)** are often reserved for patients who cannot tolerate ACE inhibitors, and like ACE inhibitors, are not the immediate first step before **glycaemic optimization**. - A **low-protein diet** is generally not recommended in children with early **diabetic nephropathy** due to potential negative impacts on growth and limited evidence for benefit at this stage.
Question 124: A 10-year-old girl experiences her first seizure consisting of jerking movements of the right arm that remain localized, with preserved consciousness throughout the 90-second episode. She has no past medical history and developmental milestones were normal. Examination reveals no focal neurological deficit. What is the most appropriate next investigation?
- A. MRI brain with contrast (Correct Answer)
- B. EEG only
- C. CT head without contrast
- D. Lumbar puncture
- E. No investigation required, observe only
Explanation: ***MRI brain with contrast***- A **focal aware seizure** (motor features localized to the right arm) in a child necessitates neuroimaging to rule out **structural brain lesions** such as tumors, cortical dysplasia, or vascular malformations.- **MRI** is the gold standard as it provides superior resolution of **cortical architecture** and the addition of **contrast** helps in identifying inflammatory or neoplastic processes.*EEG only*- While an **EEG** is vital to classify the seizure type and identify specific **epilepsy syndromes**, it cannot exclude structural abnormalities.- In the context of a **focal seizure**, imaging is prioritized to ensure there is no macroscopic lesion requiring surgical or specific medical intervention.*CT head without contrast*- **CT scans** are generally reserved for **acute emergencies** to look for hemorrhage or large masses when MRI is not immediately available.- It is less sensitive than MRI for detecting the subtle **structural pathologies** (like small tubers or focal cortical dysplasia) often associated with focal childhood seizures.*Lumbar puncture*- This invasive procedure is indicated only if there is a clinical suspicion of **meningitis or encephalitis**, usually presenting with fever or altered mental status.- The patient is currently afebrile with **normal developmental milestones** and no signs of meningism, making a CNS infection unlikely.*No investigation required, observe only*- While some single generalized seizures may be observed, a **focal seizure** is a red flag that requires investigation to exclude an underlying cause.- Failing to investigate a focal onset seizure risks missing **treatable structural lesions** or progressive neurological conditions.
Question 125: A 7-year-old boy with newly diagnosed type 1 diabetes and his family are being educated about sick day management. During intercurrent illness, which of the following statements about insulin management is correct?
- A. Insulin doses should be reduced by 50% to prevent hypoglycaemia
- B. Insulin should be stopped if the child is not eating normally
- C. Insulin requirements typically increase and doses should never be stopped (Correct Answer)
- D. Only basal insulin should be continued, with bolus insulin omitted
- E. Insulin dose adjustments are not necessary if blood glucose remains in target range
Explanation: ***Insulin requirements typically increase and doses should never be stopped***- During illness, **stress hormones** like cortisol and adrenaline cause **insulin resistance** and glycogenolysis, which typically raises blood glucose levels.- Insulin must **never be stopped**, even if the child is not eating, because basal insulin is essential to suppress **ketogenesis** and prevent **diabetic ketoacidosis (DKA)**.*Insulin doses should be reduced by 50% to prevent hypoglycaemia*- Reducing insulin arbitrarily is dangerous because the **metabolic stress** of infection usually necessitates a **20-50% increase** in dose rather than a reduction.- Dose adjustments should be based on frequent **blood glucose and ketone monitoring** every 2-4 hours during sick days.*Insulin should be stopped if the child is not eating normally*- Stopping insulin is the leading cause of **illness-precipitated DKA**; the body requires insulin to manage the counter-regulatory hormone surge regardless of oral intake.- If oral intake is poor, the focus should be on maintaining **hydration** and providing **carbohydrate-containing fluids** to allow continued insulin administration.*Only basal insulin should be continued, with bolus insulin omitted*- **Bolus insulin** is often still required to correct **hyperglycemia** and manage the glucose produced by the liver during the stress response.- Omitting bolus doses when blood glucose or **ketone levels** are elevated increases the risk of rapid clinical deterioration.*Insulin dose adjustments are not necessary if blood glucose remains in target range*- Even if glucose is stable, frequent monitoring of **blood ketones** is vital as ketosis can develop despite relatively normal glucose levels (**euglycemic DKA**).- Management must be **dynamic**; requirements can change rapidly as the illness progresses or resolves, requiring proactive adjustments.
Question 126: What is the minimum concentration of blood glucose that defines hypoglycaemia requiring treatment in a child with type 1 diabetes?
- A. Less than 3.0 mmol/L
- B. Less than 3.5 mmol/L
- C. Less than 4.0 mmol/L (Correct Answer)
- D. Less than 4.5 mmol/L
- E. Less than 5.0 mmol/L
Explanation: ***Less than 4.0 mmol/L***- According to **NICE** and **ISPAD** guidelines, hypoglycaemia in children with **type 1 diabetes** is clinically defined as a blood glucose level below **4.0 mmol/L**.- This threshold is chosen because **counter-regulatory hormones** are typically triggered at this level, and treating here prevents progression to severe neuroglycopenia.*Less than 3.0 mmol/L*- This level represents a more **severe physiological state** and is significantly below the recognized diagnostic threshold for initiating treatment in diabetic children.- Waiting for glucose to drop this low increases the risk of **seizures** or **loss of consciousness** before intervention occurs.*Less than 3.5 mmol/L*- While technically a low glucose level, this value is lower than the **standardized 4.0 mmol/L** threshold for initiating treatment in children with type 1 diabetes.- The **4.0 mmol/L** threshold is established to allow for timely intervention and prevent more significant symptoms.*Less than 4.5 mmol/L*- A blood glucose level of 4.5 mmol/L is generally considered within the **normal or acceptable range** for blood glucose, even for individuals with type 1 diabetes, and does not typically indicate hypoglycaemia requiring immediate treatment.- The aim is to maintain glucose levels above **4.0 mmol/L** to prevent symptomatic hypoglycaemia.*Less than 5.0 mmol/L*- Similar to 4.5 mmol/L, a blood glucose level of 5.0 mmol/L is well within the **normal physiological range** and would not be considered hypoglycaemia requiring treatment.- This value is a target for **normoglycaemia**, not a threshold for hypoglycaemia.
Question 127: A 16-year-old girl with juvenile myoclonic epilepsy controlled on valproate presents requesting to switch medication as she is now sexually active. She has been seizure-free for 18 months. Which alternative medication would be most appropriate considering efficacy and her reproductive health?
- A. Lamotrigine (Correct Answer)
- B. Carbamazepine
- C. Phenytoin
- D. Topiramate
- E. Phenobarbital
Explanation: ***Lamotrigine***- It is the preferred alternative for **valproate** in females of childbearing age due to its significantly lower risk of **teratogenicity** and major congenital malformations.- It provides broad-spectrum coverage for **generalized epilepsies** like JME, though it must be titrated slowly to avoid **Stevens-Johnson syndrome**.*Carbamazepine*- This sodium channel blocker is known to **exacerbate myoclonic jerks** and absence seizures in patients with **Juvenile Myoclonic Epilepsy (JME)**.- It is primarily used for **focal seizures** and is inappropriate for the generalized seizure types seen in this patient.*Phenytoin*- Similar to carbamazepine, it can **worsen myoclonic seizures** and is not considered a first-line or appropriate treatment for JME.- Long-term use is associated with significant side effects like **gingival hyperplasia**, coarsening of facial features, and **osteomalacia**.*Topiramate*- While it has broad-spectrum activity, it carries a higher risk of **teratogenicity**, specifically **cleft lip and palate**, compared to lamotrigine.- It is also associated with significant cognitive side effects often referred to as "**word-finding difficulties**" or "brain fog."*Phenobarbital*- This medication is rarely used as first-line due to its high risk of **congenital malformations** and adverse effects on **neurodevelopment** in the fetus.- It also causes significant **sedation**, cognitive impairment, and has a long half-life that makes management difficult in young patients.
Question 128: A 12-year-old girl with type 1 diabetes presents to clinic. Her insulin pump shows frequent high glucose readings (15-22 mmol/L) at 3 AM over the past 2 weeks, followed by normal pre-breakfast readings (5-7 mmol/L). She reports no symptoms during the night. Her basal insulin rate was recently increased. What is the most likely explanation?
- A. Dawn phenomenon
- B. Somogyi effect (rebound hyperglycaemia) (Correct Answer)
- C. Dietary non-compliance with bedtime snacks
- D. Insulin pump malfunction
- E. Intercurrent illness
Explanation: ***Somogyi effect (rebound hyperglycaemia)***- The **Somogyi effect** occurs when nocturnal **hypoglycaemia**, often unrecognised and caused by excessive insulin (e.g., increased basal rate), triggers the release of **counter-regulatory hormones** like glucagon, cortisol, and growth hormone.- This hormonal surge leads to a subsequent rebound **hyperglycaemia** (high glucose at 3 AM), which then corrects to normal levels by pre-breakfast, as seen with the normal 5-7 mmol/L readings.*Dawn phenomenon*- This phenomenon is characterized by an early morning increase in glucose levels (typically between 4 AM and 8 AM) due to the normal physiological release of **growth hormone** and **cortisol**.- Unlike the Somogyi effect, the dawn phenomenon does not involve an preceding drop in glucose and typically results in **high pre-breakfast glucose readings**, not the normalization observed in this patient.*Dietary non-compliance with bedtime snacks*- Consuming excessive carbohydrates before bed would usually lead to elevated glucose readings **earlier in the night** and would likely persist, resulting in high pre-breakfast levels.- This scenario does not explain the initial high 3 AM reading followed by a **spontaneous normalization** to target range by breakfast.*Insulin pump malfunction*- An insulin pump malfunction, such as an occlusion or dislodgement, typically leads to **persistent and uncontrolled hyperglycaemia** due to lack of insulin delivery.- This would generally result in continuously high glucose levels and potentially **diabetic ketoacidosis**, rather than glucose values normalizing by breakfast.*Intercurrent illness*- An intercurrent illness (e.g., infection) causes physiological stress, leading to the release of **stress hormones** that increase insulin resistance and raise blood glucose levels.- This would result in **sustained hyperglycaemia** throughout the night and into the morning, not a temporary elevation at 3 AM that normalizes by breakfast, and would likely be accompanied by other symptoms.
Question 129: A 9-year-old boy with refractory epilepsy is being considered for ketogenic diet therapy. His seizures are poorly controlled despite trials of three anti-epileptic drugs. Which of the following seizure types would be the LEAST suitable indication for ketogenic diet?
- A. Infantile spasms (West syndrome)
- B. Dravet syndrome
- C. Myoclonic-astatic epilepsy (Doose syndrome)
- D. Lennox-Gastaut syndrome
- E. Benign rolandic epilepsy (Correct Answer)
Explanation: ***Benign rolandic epilepsy*** - This is a **self-limiting** focal epilepsy of childhood that typically responds well to standard medications or may not require treatment at all due to **spontaneous remission** by adolescence. - The **ketogenic diet** is highly restrictive and inappropriate for a benign condition that lacks a **refractory** nature or a specific metabolic indication. *Infantile spasms (West syndrome)* - The ketogenic diet is a recognized and effective treatment for **refractory infantile spasms**, often used when hormonal therapy or vigabatrin fails. - It helps in achieving significant **seizure reduction** and may improve developmental outcomes in these infants. *Dravet syndrome* - This is a severe, **pharmacoresistant** epilepsy where the ketogenic diet is considered a **first-line non-pharmacological** intervention. - Clinical studies show that it is particularly effective in reducing the frequency of **convulsive seizures** in these patients. *Myoclonic-astatic epilepsy (Doose syndrome)* - The ketogenic diet is often the **treatment of choice** for this syndrome, sometimes even before traditional anti-epileptic drugs. - It frequently results in rapid and dramatic improvement in **myoclonic** and **atonic** seizure types. *Lennox-Gastaut syndrome* - This syndrome involves multiple seizure types and **cognitive impairment**, making it highly difficult to manage with drugs alone. - The ketogenic diet is a well-established therapy for **Lennox-Gastaut**, with a high percentage of patients achieving greater than 50% seizure control.
Question 130: A 14-year-old girl with type 1 diabetes for 7 years is admitted with severe DKA (pH 7.05, glucose 28 mmol/L, ketones 5.8 mmol/L). During initial treatment with IV fluids and insulin infusion, she becomes increasingly drowsy with bradycardia and develops a fixed dilated right pupil. What is the most appropriate immediate management?
- A. Immediate CT head scan
- B. Increase insulin infusion rate
- C. Administer IV mannitol 0.5-1 g/kg or hypertonic saline 2.7% (Correct Answer)
- D. Rapid IV fluid bolus 20 mL/kg
- E. Reduce insulin infusion and increase glucose supplementation
Explanation: ***Administer IV mannitol 0.5-1 g/kg or hypertonic saline 2.7%*** - The sudden neurological deterioration, including increasing drowsiness, **bradycardia**, and a **fixed dilated pupil**, are classic signs of **cerebral edema** and impending uncal herniation, a life-threatening complication of DKA treatment. - Immediate administration of **osmotic agents** like **IV mannitol** or **hypertonic saline** is crucial to rapidly reduce intracranial pressure and prevent further brain injury or death, without delaying for neuroimaging. *Immediate CT head scan* - While a **CT head scan** is important for confirming **cerebral edema**, it must not delay life-saving treatment with osmotic agents. - Clinical suspicion necessitates immediate intervention; imaging should only be performed once the patient is stabilized and intracranial pressure is being addressed. *Increase insulin infusion rate* - Increasing the **insulin infusion** does not address the acute intracranial emergency and might even contribute to fluid shifts that exacerbate **cerebral edema**. - The immediate priority is managing intracranial pressure, not accelerating the metabolic correction of DKA. *Rapid IV fluid bolus 20 mL/kg* - A rapid **IV fluid bolus** is contraindicated as aggressive fluid administration is a recognized risk factor for developing or worsening **cerebral edema** in DKA patients, particularly children. - Fluid management should be carefully controlled and may need to be restricted upon suspicion of **cerebral edema**. *Reduce insulin infusion and increase glucose supplementation* - Although hypoglycemia can cause altered mental status, the combination of **bradycardia** and a **fixed dilated pupil** points strongly to increased intracranial pressure and **brainstem compression**, not hypoglycemia. - This intervention would address hypoglycemia, but it fails to treat the critical and immediate problem of **cerebral edema**.
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