Pediatric Nutrition Practice Questions

Q: A 12-year-old boy presents with chronic knee pain for 2 years. A knee X-ray is shown. What is the probable diagnosis?

Rickets. ***Rickets*** - Classic X-ray findings include **metaphyseal cupping and fraying** at the growth plates, **widening of growth plates**, and **osteopenia**, which are characteristic of vitamin D deficiency in children. - Chronic knee pain in a **12-year-old** with these imaging changes strongly suggests rickets, as growth plates are still active at this age. *Chronic osteomyelitis* - Would show **bone destruction**, **sequestrum formation**, and **sclerotic changes** on X-ray, not the metaphyseal changes seen in rickets. - Typically presents with **fever**, **localized warmth**, and **acute onset** rather than chronic pain alone. *Osteosarcoma* - X-ray would demonstrate a **destructive bone lesion** with **sunburst pattern** or **Codman's triangle**, not metaphyseal cupping. - Usually presents as a **rapidly growing mass** with severe pain that worsens at night, unlike the chronic presentation described. *Hyperparathyroidism* - Causes **subperiosteal bone resorption** and **brown tumors** on X-ray, not the metaphyseal changes characteristic of rickets. - More commonly affects **adults** and presents with **hypercalcemia symptoms** like kidney stones and psychiatric symptoms.

Q: Flaring of the anterior ends of the ribs is characteristically seen in which condition?

Rickets. ### Explanation **Correct Option: C. Rickets** The flaring or enlargement of the anterior ends of the ribs at the costochondral junctions is known as the **Rachitic Rosary**. In Rickets (most commonly due to Vitamin D deficiency), there is a failure of mineralization of the osteoid matrix. This leads to a compensatory overgrowth of the epiphyseal cartilage and disorganized expansion of the growth plate. Clinically, these appear as non-tender, rounded beads arranged in a row on either side of the sternum. **Analysis of Incorrect Options:** * **A. Neurofibromatosis:** While it can cause skeletal deformities like sphenoid wing dysplasia or "rib ribboning" (thinning of ribs), it does not cause flaring of the anterior rib ends. * **B. Scurvy:** Scurvy also presents with a "Scorbutic Rosary." However, unlike the smooth, rounded beads of Rickets, the scorbutic rosary is **angular and tender**, caused by the subluxation of the sternum backward at the costochondral junction. * **D. Hypothyroidism:** Congenital hypothyroidism (Cretinism) leads to delayed bone age and epiphyseal dysgenesis (stippled epiphysis), but not costochondral flaring. **NEET-PG High-Yield Pearls:** * **Rachitic Rosary:** Rounded, non-tender, due to cartilage hypertrophy. * **Scorbutic Rosary:** Sharp/Angular, tender, due to subluxation. * **Harrison’s Sulcus:** A horizontal groove along the lower border of the thorax corresponding to the insertion of the diaphragm, often seen in severe Rickets. * **Craniotabes:** Softening of skull bones (ping-pong ball sensation), the earliest sign of Rickets (seen before 6 months of age). * **Radiological Sign:** "Cupping, splaying, and fraying" of the metaphysis is the hallmark of Rickets.

Q: In a breastfed infant, what is the primary reason for a reduced chance of enteric infection?

Nutrients and immunological superiority of breast milk. **Explanation:** The primary reason for the reduced incidence of enteric infections in breastfed infants is the **nutrients and immunological superiority of breast milk**. Breast milk is a living biological fluid containing a synergistic combination of bioactive factors. Key components include **Secretory IgA (sIgA)**, which prevents pathogen adherence to the gut mucosa, **Lactoferrin**, which sequesters iron to inhibit bacterial growth, and **Lysozymes**. Furthermore, breast milk contains **Human Milk Oligosaccharides (HMOs)**, which act as prebiotics to promote a healthy microbiome, providing a multi-layered defense system that is superior to any single component alone. **Analysis of Incorrect Options:** * **Option A:** Incorrect. The gut of a breastfed infant is actually **acidic (low pH)**, not alkaline. This acidity is maintained by the fermentation of lactose by *Lactobacillus bifidus*, which inhibits the growth of pathogens like *E. coli* and *Shigella*. * **Option C:** Incorrect because it is too narrow. While immunoglobulins (specifically sIgA) are vital, they are only one part of the "immunological superiority." Option B is a more comprehensive answer encompassing cellular immunity, enzymes, and prebiotics. * **Option D:** Incorrect. *Bacteroides* and *Clostridium* are typically found in higher concentrations in **formula-fed infants**. Breastfed infants have a gut flora dominated by **Bifidobacteria**. **NEET-PG High-Yield Pearls:** * **Bifidus Factor:** A specific carbohydrate in breast milk that promotes the growth of *Lactobacillus bifidus*, leading to an acidic gut environment. * **Secretory IgA:** The most abundant immunoglobulin in breast milk; it provides "passive mucosal immunity" without triggering inflammation. * **Colostrum:** Richer in antibodies (IgA) and white blood cells compared to mature milk, acting as the infant's "first immunization."

Q: What is true about rickets?

Hypophosphatemia. **Explanation:** Rickets is a disorder of defective mineralization of the osteoid matrix at the growth plates, most commonly due to Vitamin D deficiency. **1. Why Hypophosphatemia is Correct:** In Vitamin D deficiency, there is decreased intestinal absorption of Calcium ($Ca^{2+}$). This leads to **secondary hyperparathyroidism** (increased PTH). PTH acts on the kidneys to increase calcium reabsorption but simultaneously **decreases renal phosphate reabsorption** (phosphaturia). This results in low serum phosphate levels (**Hypophosphatemia**). Low phosphate is the primary driver of the failure of chondrocyte apoptosis and subsequent defective mineralization seen in rickets. **2. Why the other options are incorrect:** * **A. Hyperphosphatemia:** Incorrect. As explained, PTH-mediated renal loss leads to low, not high, serum phosphate. * **C. Hypophosphaturia:** Incorrect. PTH causes **Hyperphosphaturia** (increased phosphate in urine) by inhibiting the Na-Pi cotransporter in the proximal tubule. * **D. Decreased alkaline phosphatase:** Incorrect. **Elevated Alkaline Phosphatase (ALP)** is the hallmark biochemical marker of rickets. It reflects increased osteoblastic activity attempting to compensate for the mineralization defect. **High-Yield Clinical Pearls for NEET-PG:** * **Earliest Biochemical Sign:** Decreased serum $25(OH)D$ levels. * **Earliest Radiological Sign:** Rarefaction of the zone of provisional calcification (seen at the wrist). * **Classic Radiological Triad:** Cupping, Splaying, and Fraying of the metaphysis. * **Key Biochemical Profile:** ↓/Normal Calcium, **↓ Phosphate**, **↑ ALP**, and **↑ PTH**. * **Craniotabes:** The earliest clinical sign of rickets (softening of skull bones).

Q: Breastfeeding must be initiated within which timeframe after birth?

One hour. **Explanation:** The correct answer is **One hour**. According to the World Health Organization (WHO) and the Ministry of Health and Family Welfare (MoHFW) guidelines under the MAA (Mothers’ Absolute Affection) program, breastfeeding should be initiated within the **"Golden Hour"** (the first hour) of birth. **Why One Hour is Correct:** Early initiation of breastfeeding (EIBF) within one hour ensures the newborn receives **colostrum**, the "first vaccine," which is rich in antibodies (IgA) and growth factors. It promotes skin-to-skin contact, which stabilizes the infant’s temperature (preventing hypothermia), regulates blood glucose levels, and fosters maternal-infant bonding. Furthermore, the suckling reflex triggers oxytocin release in the mother, aiding uterine contraction and reducing the risk of postpartum hemorrhage (PPH). **Analysis of Incorrect Options:** * **A. Half an hour:** While initiating within 30 minutes is ideal and often encouraged in clinical practice, the standard public health guideline and the most widely accepted answer for competitive exams is "within one hour." * **C & D. Two/Four hours:** Delaying breastfeeding beyond the first hour increases the risk of neonatal mortality, hypoglycemia, and the likelihood of introducing pre-lacteal feeds, which can interfere with successful exclusive breastfeeding. **High-Yield Clinical Pearls for NEET-PG:** * **Exclusive Breastfeeding:** Recommended for the first **6 months** of life. * **Colostrum:** Produced in the first 2–3 days; high in protein, Vitamin A, and IgA, but lower in fat and lactose than mature milk. * **Rooting Reflex:** Most active in the first 30–60 minutes of life, making the "Golden Hour" the physiological window for the first feed. * **Cesarean Section:** Breastfeeding should be initiated as soon as the mother is conscious/stable, ideally within **4 hours**.

Question 1

Hungry diarrhoea is seen in which of the following conditions?

Accepted Answer

Marasmus

Answer

Kwashiorkor

Answer

Obesity

Answer

Dehydration

Question 2

A 12-year-old boy presents with chronic knee pain for 2 years. A knee X-ray is shown. What is the probable diagnosis?

Accepted Answer

Rickets

Answer

Chronic osteomyelitis

Answer

Osteosarcoma

Answer

Hyperparathyroidism

Question 3

A 2-year-old child was brought to the emergency department with convulsions. On rapid general physical examination, kyphoscoliosis was discovered. X-ray showed swollen lower ends of the radius. What is the likely diagnosis?

Accepted Answer

Rickets

Answer

Osteomalacia

Answer

Keratomalacia

Answer

Pellagra

Question 4

Flaring of the anterior ends of the ribs is characteristically seen in which condition?

Accepted Answer

Rickets

Answer

Neurofibromatosis

Answer

Scurvy

Answer

Hypothyroidism

Question 5

A 9-month-old child develops vomiting and drowsiness following routine immunization. On examination, there is a bulging anterior fontanelle and fundoscopy reveals papilledema. The child develops cranial nerve palsies within a few hours. Despite these findings, the child remains afebrile with a clear chest. What is the most probable diagnosis?

Accepted Answer

Vitamin A toxicity

Answer

Meningitis

Answer

Sagittal sinus thrombosis

Answer

Astrocytoma

Question 6

The composition of breast milk varies at different points of lactation to suit the baby's needs. Which statement is not true about breast milk composition?

Accepted Answer

Mature milk is thicker with all the essential nutrients for growth

Answer

Preterm milk has more proteins

Answer

Foremilk is watery and is rich in proteins and sugar

Answer

Hindmilk is richer in fat and provides more energy

Question 7

In a breastfed infant, what is the primary reason for a reduced chance of enteric infection?

Accepted Answer

Nutrients and immunological superiority of breast milk

Answer

Alkaline pH of the infant's gut

Answer

Immunoglobulin content in breast milk

Answer

Presence of Bacteroides and Clostridium in the infant's gut

Question 8

What is true about rickets?

Accepted Answer

Hypophosphatemia

Answer

Hyperphosphatemia

Answer

Hypophosphaturia

Answer

Decreased alkaline phosphatase

Question 9

Breastfeeding must be initiated within which timeframe after birth?

Accepted Answer

One hour

Answer

Half an hour

Answer

Two hours

Answer

Four hours

Question 10

In a 3-year-old child, which of the following is NOT a criterion for the diagnosis of severe acute malnutrition?

Accepted Answer

Presence of flaky paint dermatosis

Answer

Weight/height < -3 Z scores using WHO growth charts

Answer

Presence of bipedal edema of nutritional origin

Answer

Mid-upper arm circumference (MUAC) < 115 mm

Pediatric Nutrition — MCQs

Pediatric Nutrition — MCQs

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