Growth & Development in Pediatrics Flashcards

Which of the following best characterizes the 'adiposity rebound' and its clinical significance?

Answer: The nadir and subsequent rise in BMI that normally occurs around age 5–6 years

Adiposity rebound is the normal physiologic increase in BMI that follows its nadir around age 5–6 years; early adiposity rebound (before age 5) is associated with increased risk of adult obesity.

A CSP is counseling a family about their 8-year-old girl with early puberty (Tanner stage 2 breast development). Regarding final adult height, which statement is most accurate?

Answer: Early puberty often results in shorter final adult height due to premature epiphyseal closure

Precocious puberty leads to early sex steroid exposure that accelerates epiphyseal plate closure, often resulting in a shorter final adult height despite an initial period of rapid growth.

In the context of growth assessment, what does the term 'weight age' refer to?

Answer: The chronological age at which the 50th percentile equals the child's current weight

Weight age is the chronological age at which the 50th percentile weight equals the child's actual weight, used to calculate energy needs based on expected metabolic demand for that weight.

Which of the following is a recognized consequence of catch-up growth occurring too rapidly in a severely malnourished infant?

Answer: Refeeding syndrome with electrolyte disturbances

Rapid refeeding of severely malnourished children can cause refeeding syndrome, characterized by dangerous shifts in phosphate, potassium, and magnesium as anabolic processes resume, potentially causing cardiac and neurologic complications.

A full-term newborn is at the 2nd percentile for birth weight and 50th percentile for length. This most likely reflects which condition?

Answer: Asymmetric IUGR with brain-sparing

Asymmetric IUGR occurs when a third-trimester insult (e.g., placental insufficiency) preferentially reduces soft tissue and abdominal girth while sparing brain growth, resulting in low weight with preserved length and head circumference.

When using the Waterlow classification for malnutrition, which measure is used to assess wasting (acute malnutrition)?

Answer: Weight-for-height

In the Waterlow classification, wasting (acute malnutrition) is assessed by weight-for-height, while stunting (chronic malnutrition) is assessed by height-for-age, allowing distinction between acute and chronic nutritional deficits.

A 10-month-old infant presents with developmental regression, loss of previously acquired milestones, and growth faltering. Which of the following conditions should be highest on the differential?

Answer: A neurodegenerative or metabolic disorder

Loss of previously achieved developmental milestones (regression) is never normal and should trigger urgent evaluation for metabolic, neurologic, or systemic disease rather than being attributed to a normal growth variant.