Developmental and Behavioral Pediatrics Practice Questions

Q: What is the treatment of choice for a 5-year-old child with bedwetting?

Motivational therapy. ***Motivational therapy*** - This is the **first-line active treatment** for **primary nocturnal enuresis** in children, involving encouragement, positive reinforcement (star charts), rewards, and education about bladder control. - It focuses on **behavioral strategies** and can be highly effective with parental involvement. - When intervention is pursued at age 5, motivational therapy is preferred over pharmacological options due to safety and effectiveness. *No treatment* - At age 5, **watchful waiting with reassurance** is often appropriate since nocturnal enuresis is common at this age (affects 15-20% of 5-year-olds) and has a **spontaneous resolution rate of 15% per year**. - However, when the question asks for "treatment of choice," it implies active intervention rather than observation alone. - Active behavioral therapy is preferred when bedwetting causes distress or affects the child's self-esteem. *Imipramine* - **Imipramine** is a **tricyclic antidepressant** with anticholinergic effects that can reduce bladder contractions, but it has significant side effects including **cardiac arrhythmias** and is **not first-line treatment**. - It is typically reserved for children ≥7 years after behavioral interventions fail, due to its potential adverse effects and high relapse rate after discontinuation. *Desmopressin* - **Desmopressin** is an **antidiuretic hormone analog** that reduces urine production overnight. - While effective, it is typically reserved for children ≥6 years who are unresponsive to behavioral therapy or for **short-term situational use** (e.g., sleepovers, camps). - Side effects include potential **hyponatremia** and high relapse rate after discontinuation.

Q: In which condition is a stimulant drug commonly prescribed for children?

Attention Deficit Hyperactivity Disorder (ADHD). ***Attention Deficit Hyperactivity Disorder (ADHD)*** - **Stimulant medications** (methylphenidate, amphetamines) are the **first-line pharmacologic treatment** for ADHD in children and represent the **most common indication** for stimulant use in pediatrics. - These drugs improve **focus**, reduce **hyperactivity**, and decrease **impulsivity** by increasing **dopamine** and **norepinephrine** levels in the brain. - ADHD affects approximately **5-10% of children**, making stimulant prescriptions extremely common in pediatric practice. *Narcolepsy* - While stimulants (methylphenidate, modafinil) are **indicated** for pediatric narcolepsy to treat excessive daytime sleepiness, this condition is **rare in children** (prevalence <0.05%). - Narcolepsy typically presents with **irresistible sleep attacks**, **cataplexy** (sudden muscle weakness with emotions), and other features. - Though stimulants are appropriate treatment, the **low prevalence** makes this a much less common indication than ADHD. *Obstructive Sleep Apnea* - Primary treatment involves addressing the **airway obstruction** through **adenotonsillectomy** in children or **CPAP** therapy. - **Stimulants are not indicated** for OSA and could potentially worsen cardiovascular complications. - Treating the underlying sleep disorder is essential, not masking daytime sleepiness with stimulants. *Conduct Disorder* - Characterized by **persistent aggressive and defiant behaviors** violating societal norms. - Primary treatment is **psychotherapy** and **behavioral interventions**, not pharmacotherapy. - Stimulants are **not effective** for core conduct disorder symptoms unless there is **comorbid ADHD**.

Q: Which of the following conditions is least likely to be associated with intellectual disability?

Hypopituitarism. ***Hypopituitarism*** - This condition primarily affects **growth** and **metabolism** due to deficiencies in pituitary hormones but typically does not directly cause intellectual disability unless severe complications arise or it is a component of a larger syndrome affecting brain development. - While it can lead to developmental delays if growth hormone is deficient, it's less directly linked to intrinsic intellectual impairment compared to the other options. *Cretinism* - This is a condition of **severe congenital hypothyroidism** that, if untreated, leads to profoundly impaired physical and mental development. - Adequate thyroid hormone is crucial for normal brain development, and its absence results in irreversible intellectual disability. *Birth asphyxia* - Refers to a lack of oxygen to the brain around the time of birth, which can cause **hypoxic-ischemic encephalopathy (HIE)**. - HIE can lead to significant and permanent brain damage, often resulting in cerebral palsy and intellectual disability. *Down syndrome* - This genetic disorder, caused by a **trisomy of chromosome 21**, is characterized by a range of physical features and a varying degree of intellectual disability. - Intellectual disability is a universal feature of Down syndrome, though its severity can differ between individuals.

Q: A 5-year-old child is assessed to have a developmental age of one year. What is his developmental quotient?

20. ***20*** - The **developmental quotient (DQ)** is calculated as (developmental age ÷ chronological age) × 100. In this case, (1 year ÷ 5 years) × 100 = 20. - A DQ of 20 indicates a significant **developmental delay**, as the child's developmental age is much lower than their chronological age. *100* - A developmental quotient of 100 would mean the child's **developmental age is equal to their chronological age**, indicating typical development. - In this scenario, it would imply a 5-year-old child having a developmental age of 5 years, which is not the case. *80* - A developmental quotient of 80 would mean the child's developmental age is 80% of their chronological age, or (4 years ÷ 5 years) × 100. - This would still indicate some developmental delay, but not as severe as observed, as the child's developmental age is only 1 year. *60* - A developmental quotient of 60 would mean the child's developmental age is 60% of their chronological age, or (3 years ÷ 5 years) × 100. - While indicating a delay, it is not consistent with a 1-year developmental age for a 5-year-old child.

Q: Which of the following statements about Rett syndrome is true?

It is an X-linked disorder.. ***It is an X-linked disorder.*** - Rett syndrome is caused by mutations in the **MECP2 gene** located on the **X chromosome**. - This X-linked inheritance pattern explains the differing prevalence and severity between males and females. *It is associated with malformation of the brain.* - While Rett syndrome is a **neurodevelopmental disorder**, it is not characterized by overt structural brain malformations. - Instead, it involves **defects in brain function and development** at a molecular level, particularly affecting synaptic plasticity. *Males are more commonly affected than females.* - Rett syndrome predominantly affects **females**, as males with the causative MECP2 mutation typically experience severe encephalopathy and often die in infancy or early childhood. - Females can survive due to **X-inactivation**, which allows for a mosaic pattern of expression. *Seizures are less common in affected individuals.* - **Seizures are very common** in individuals with Rett syndrome, affecting up to 80% or more of patients. - They can manifest in various forms and often become a significant clinical challenge during adolescence and adulthood.

Question 1

What is the treatment of choice for a 5-year-old child with bedwetting?

Accepted Answer

Motivational therapy

Answer

No treatment

Answer

Imipramine

Answer

Desmopressin

Question 2

In which condition is a stimulant drug commonly prescribed for children?

Accepted Answer

Attention Deficit Hyperactivity Disorder (ADHD)

Answer

Obstructive Sleep Apnea

Answer

Conduct Disorder

Answer

Narcolepsy

Question 3

Which of the following conditions is least likely to be associated with intellectual disability?

Accepted Answer

Hypopituitarism

Answer

Cretinism

Answer

Birth asphyxia

Answer

Down syndrome

Question 4

A 5-year-old child is assessed to have a developmental age of one year. What is his developmental quotient?

Accepted Answer

20

Answer

100

Answer

80

Answer

60

Question 5

Which of the following statements about Rett syndrome is true?

Accepted Answer

It is an X-linked disorder.

Answer

It is associated with malformation of the brain.

Answer

Males are more commonly affected than females.

Answer

Seizures are less common in affected individuals.

Developmental and Behavioral Pediatrics — MCQs

Developmental and Behavioral Pediatrics — MCQs

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