Pediatric Nutrition Practice Questions

Q: Flag sign and flaky paint dermatitis are characteristically seen in which condition?

Kwashiorkor. **Explanation:** **Kwashiorkor** is a form of severe acute malnutrition (SAM) characterized by a relative deficiency of protein despite adequate or near-adequate caloric intake. * **Flaky Paint Dermatitis (Crazy Paving Dermatosis):** This is the hallmark skin lesion of Kwashiorkor. It begins as erythematous patches that become hyperpigmented and dry. These patches then crack and peel off, resembling old, peeling paint, leaving behind pale or raw skin. * **Flag Sign:** This refers to alternating bands of light (depigmented) and dark (normal) hair. The light bands represent periods of poor protein intake (reduced melanin synthesis), while dark bands represent periods of improved nutrition. **Why other options are incorrect:** * **Marasmus:** Caused by a total deficiency of all nutrients (calories and protein). It is characterized by severe muscle wasting, "baggy pants" appearance (loss of gluteal fat), and an "old man" facies, but lacks the edema and specific skin/hair changes of Kwashiorkor. * **Pellagra:** Caused by Niacin (Vitamin B3) deficiency. It presents with the "3 Ds" (Dermatitis, Diarrhea, Dementia). The dermatitis is typically photosensitive (Casal’s necklace) and does not show the "flaky paint" morphology. * **Nutritional Dwarfism:** Refers to children with chronic malnutrition who are stunted (low height-for-age) but have normal weight-for-height proportions. **High-Yield Clinical Pearls for NEET-PG:** * **Edema:** The essential diagnostic feature of Kwashiorkor (due to hypoalbuminemia). * **Psychological changes:** Children with Kwashiorkor are typically apathetic and irritable, whereas marasmic children are often hungry/alert. * **Fatty Liver:** Common in Kwashiorkor due to decreased synthesis of Apolipoprotein B-100, leading to impaired VLDL export.

Q: Iron supplementation in a healthy term breastfed baby should be started at what age?

None of the above. **Explanation:** The correct answer is **None of the above** because a healthy, term, breastfed infant typically does not require medicinal iron supplementation until **4 to 6 months of age**. **1. Why the correct answer is right:** Term infants are born with sufficient iron stores (transferred transplacentally during the third trimester) to last for the first 4–6 months of life. While breast milk contains a low absolute concentration of iron (approx. 0.3 mg/L), it has exceptionally high **bioavailability (about 50%)** compared to cow’s milk (10%). By 6 months, these endogenous stores deplete, and the infant’s rapid growth increases iron demand, necessitating the introduction of iron-rich complementary foods (weaning). **2. Why the other options are incorrect:** * **A & B (2 and 4 weeks):** These are too early for term infants. Supplementation at this stage is only considered for **Preterm infants (<37 weeks)** or low-birth-weight babies, who have missed the third-trimester iron transfer. Preterms usually start iron at 2–4 weeks of age. * **C (8 weeks):** While some guidelines suggest starting preterm infants on iron by 8 weeks if not already started, it remains unnecessary for healthy term infants. **3. High-Yield Clinical Pearls for NEET-PG:** * **Preterm Infants:** Require iron supplementation (2–4 mg/kg/day) starting at **2 weeks to 1 month** of age. * **Exclusive Breastfeeding:** Should be maintained for 6 months; however, iron-rich solids must be introduced thereafter to prevent **Iron Deficiency Anemia (IDA)**. * **Cow’s Milk:** Should be avoided before **1 year of age** as it is poor in iron and can cause microscopic intestinal bleeding. * **Daily Requirement:** A term infant requires approximately 1 mg/kg/day of iron after 6 months.

Q: The flag hair sign is seen in which of the following conditions?

Kwashiorkor. ### Explanation **Flag Sign (Signo de la Bandera)** is a characteristic clinical finding in **Kwashiorkor**, a form of severe protein-energy malnutrition (PEM). It occurs due to intermittent periods of protein deficiency alternating with periods of adequate nutrition. During protein deprivation, hair synthesis is impaired, leading to loss of melanin (hypochromia) and a change in texture. This results in alternating bands of light (depigmented) and dark (normally pigmented) hair, resembling a flag. #### Analysis of Options: * **Kwashiorkor (Correct):** Caused by severe protein deficiency despite adequate caloric intake. Along with the flag sign, it presents with "flaky paint" dermatitis, pitting edema (due to hypoalbuminemia), and a fatty liver. * **Marasmus:** Caused by a deficiency of both proteins and total calories. Hair may be thin or sparse, but the distinct alternating bands of the flag sign are absent. Key features include "monkey facies" and generalized muscle wasting without edema. * **Scurvy:** Vitamin C deficiency leads to "corkscrew hair" and perifollicular hemorrhages, not the flag sign. * **Pellagra:** Niacin (Vitamin B3) deficiency is characterized by the 3 Ds (Dermatitis, Diarrhea, Dementia) and the "Casal’s necklace" rash, but it does not affect hair pigmentation in this pattern. #### High-Yield Clinical Pearls for NEET-PG: * **Hair changes in Kwashiorkor:** Easy pluckability, thinning, and loss of curl (straightening). * **Edema:** The hallmark difference between Kwashiorkor (present) and Marasmus (absent). * **Psychological state:** Children with Kwashiorkor are typically apathetic and irritable, whereas Marasmic children are often alert but hungry. * **Flag sign** can also be seen in Hartnup disease due to impaired tryptophan (and thus protein) metabolism.

Q: Which of the following is not a sign of active rickets?

Saddle nose. **Explanation:** The correct answer is **C. Saddle nose**. **Understanding the Concept:** Rickets is a disorder of defective mineralization of the osteoid matrix in growing bones, primarily due to Vitamin D deficiency. **Saddle nose** (a depressed nasal bridge) is a classic feature of **Congenital Syphilis**, not rickets. It results from the destruction of the nasal cartilage due to syphilitic rhinitis (snuffles). **Analysis of Options:** * **Prominent Fontanelle:** In active rickets, there is a delay in the closure of the anterior fontanelle (normally closes by 18 months). This, combined with **craniotabes** (softening of skull bones), leads to a persistently wide and prominent fontanelle. * **Hot Cross Bun Sign:** This occurs due to **frontal and parietal bossing**. The excessive osteoid deposition creates prominences separated by the sagittal and coronal sutures, giving the skull a "quadrate" appearance resembling a hot cross bun. * **Caries Teeth:** Rickets leads to **enamel hypoplasia** and delayed dentition. The poorly mineralized enamel is highly susceptible to dental caries and early tooth decay. **High-Yield Clinical Pearls for NEET-PG:** * **Earliest Sign of Rickets:** Craniotabes (detectable in the first few months, usually at the occiput/parietal bones). * **Earliest Radiological Sign:** Cupping and splaying of the distal ends of long bones (best seen at the **wrist**—distal radius and ulna). * **Rachitic Rosary:** Palpable (and later visible) enlargement of the costochondral junctions (rounded/beaded). In contrast, the **Scorbutic Rosary** (Scurvy) is sharp and angular. * **Harrison’s Sulcus:** A horizontal groove along the lower border of the thorax corresponding to the insertion of the diaphragm.

Q: Which of the following is a clinical feature seen in Kwashiorkar?

Edema and apathy. **Explanation:** Protein-Energy Malnutrition (PEM) is classified into two main types: **Kwashiorkor** and **Marasmus**. **Why Option D is Correct:** Kwashiorkor is primarily caused by a severe deficiency of dietary protein despite adequate or near-adequate calorie intake. The hallmark feature is **pitting edema**, which typically starts in the lower limbs and can progress to generalized edema (anasarca). This occurs due to **hypoalbuminemia**, leading to decreased plasma oncotic pressure. **Apathy** (mental irritability and lack of interest) is a characteristic behavioral change in these children. Other classic signs include "Flaky-paint" dermatitis and "Flag sign" (alternating bands of hair pigmentation). **Why Other Options are Incorrect:** * **Options A, B, and C** are classic features of **Marasmus**, which is caused by a deficiency of both proteins and total calories (starvation). * **Loose wrinkled skin:** Result of loss of subcutaneous fat and muscle wasting ("baggy pants" appearance). * **Hunger pangs:** Marasmic children are typically ravenous (hungry), whereas children with Kwashiorkor often suffer from anorexia (poor appetite). * **Simian facies:** The loss of buccal fat pads gives the child an aged, monkey-like appearance (Simian facies). **High-Yield Clinical Pearls for NEET-PG:** * **Kwashiorkor:** Edema is mandatory for diagnosis. Fatty liver (hepatomegaly) is common due to decreased synthesis of Apolipoprotein B-100. * **Marasmus:** No edema. Severe muscle wasting is the predominant feature. * **WHO Classification:** Uses Weight-for-Height Z-scores. Severe Acute Malnutrition (SAM) is defined as W/H < -3SD, presence of visible wasting, or presence of nutritional edema.

Question 1

Flag sign and flaky paint dermatitis are characteristically seen in which condition?

Accepted Answer

Kwashiorkor

Answer

Marasmus

Answer

Pellagra

Answer

Nutritional dwarfism

Question 2

Iron supplementation in a healthy term breastfed baby should be started at what age?

Accepted Answer

None of the above

Answer

2 weeks

Answer

4 weeks

Answer

8 weeks

Question 3

The flag hair sign is seen in which of the following conditions?

Accepted Answer

Kwashiorkor

Answer

Marasmus

Answer

Scurvy

Answer

Pellagra

Question 4

Which of the following is not a sign of active rickets?

Accepted Answer

Saddle nose

Answer

Prominent fontanelle

Answer

Hot cross bun sign

Answer

Caries teeth

Question 5

Which of the following is a clinical feature seen in Kwashiorkar?

Accepted Answer

Edema and apathy

Answer

Loose wrinkled skin

Answer

Hunger pangs

Answer

Simian facies

Pediatric Nutrition — MCQs

Pediatric Nutrition — MCQs

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