Neonatology Practice Questions

Q: Gynecomastia in neonates is typically caused by which of the following?

Maternal estrogen exposure. **Explanation:** **Neonatal gynecomastia** (breast engorgement) is a common, physiological finding occurring in up to 60–90% of newborns. **1. Why Option A is Correct:** The primary cause is the **transplacental transfer of maternal estrogen** during pregnancy. High levels of circulating maternal estrogens stimulate the neonatal breast tissue in utero. After birth, the sudden withdrawal of maternal estrogen, combined with the newborn's high prolactin levels (from the pituitary), can also lead to "witch’s milk" (transient neonatal galactorrhea). This condition is benign and typically resolves spontaneously within weeks to months as hormone levels decline. **2. Why the Other Options are Incorrect:** * **Option B:** While progesterone is elevated during pregnancy, it primarily influences ductal development but is not the trigger for the glandular hyperplasia seen in neonatal gynecomastia. * **Option C & D:** While the hypothalamic-pituitary-gonadal axis is active in neonates (the "mini-puberty" of infancy), the immediate postnatal breast enlargement is a direct result of the hormonal environment established *in utero* by maternal steroids, not the infant's own GnRH or gonadotropins. **High-Yield Clinical Pearls for NEET-PG:** * **Management:** Reassurance is key. Advise parents **not to squeeze** the breast tissue, as this can cause trauma, mastitis, or breast abscess. * **Timeline:** It usually appears in the first week of life and disappears by 2–6 months. * **Witch’s Milk:** Secretion of milk from the newborn's nipple is normal and occurs in about 5% of cases. * **Precocious Puberty:** If breast development persists beyond 2 years or is accompanied by other signs of puberty, investigate for premature thelarche or endocrine disorders.

Q: A premature baby of 34 weeks gestation was delivered and subsequently developed bullous lesions on the skin. Radiographic examination revealed periostitis. What is the most appropriate next investigation?

VDRL for mother and baby. The clinical presentation of a premature neonate with **bullous skin lesions** (Pemphigus syphiliticus) and **periostitis** is a classic triad for **Congenital Syphilis**. ### **Explanation of the Correct Answer** * **Congenital Syphilis:** Caused by *Treponema pallidum* crossing the placenta. * **Cutaneous Manifestations:** The characteristic rash involves vesiculobullous lesions, often on the palms and soles, which may desquamate. * **Skeletal Manifestations:** Radiographic signs like **periostitis** (inflammation of the periosteum), Wimberger’s sign (metaphyseal erosions of the medial proximal tibia), and osteochondritis are hallmark features. * **Diagnosis:** The initial screening step is performing non-treponemal tests like **VDRL or RPR** on both the mother and the infant. A positive result in the infant, especially with a titer fourfold higher than the mother’s, strongly supports the diagnosis. ### **Why Other Options are Incorrect** * **B. ELISA for HIV:** While HIV can be vertically transmitted, it typically presents with failure to thrive, lymphadenopathy, and opportunistic infections, not bullous lesions or periostitis. * **C. PCR for TB:** Congenital Tuberculosis usually presents with hepatosplenomegaly, respiratory distress, and fever; it does not cause bullous skin lesions. * **D. Hepatitis B surface antigen:** Neonatal Hep-B is usually asymptomatic at birth and does not present with skeletal or bullous skin involvement. ### **High-Yield Clinical Pearls for NEET-PG** * **Pemphigus Syphiliticus:** The only bullous lesion present at birth that involves the palms and soles. * **Snuffles:** Persistent syphilitic rhinitis (bloody/mucinous discharge) is a common early sign. * **Hutchinson’s Triad (Late Syphilis):** Hutchinson teeth, Interstitial keratitis, and Eighth nerve deafness. * **Treatment of Choice:** Intravenous **Penicillin G** for 10 days.

Q: Cord cutting should be delayed in which condition?

Severe anemia. **Explanation:** **Delayed Cord Cutting (DCC)** refers to clamping the umbilical cord at least 30–60 seconds after birth (or until pulsations cease). This practice allows for a "placental transfusion," providing the neonate with approximately 80–100 mL of additional blood, which significantly increases iron stores and hemoglobin levels. **Why Severe Anemia is Correct:** In cases of **Severe Anemia** (often due to maternal iron deficiency), DCC is highly beneficial. The extra blood volume increases the infant’s iron status for up to 6 months of life, reducing the risk of iron-deficiency anemia and improving neurodevelopmental outcomes. **Why the other options are incorrect:** * **Rh Incompatibility:** Traditionally, DCC was avoided to prevent the transfer of maternal antibodies and excess bilirubin, which could worsen jaundice or lead to kernicterus. Immediate clamping is usually preferred here. * **Asphyxia:** Infants with birth asphyxia require immediate resuscitation (the "Golden Minute"). Delaying cord clamping in a non-breathing infant delays life-saving interventions. * **IUGR (Intrauterine Growth Restriction):** While some guidelines suggest DCC is safe, IUGR infants are at a higher risk of polycythemia and hyperviscosity. Therefore, it is not the primary indication compared to anemia. **High-Yield Facts for NEET-PG:** * **WHO Recommendation:** DCC is recommended for all births (term and preterm) who do not require immediate resuscitation. * **Benefits in Preterms:** Reduced risk of Intraventricular Hemorrhage (IVH), Necrotizing Enterocolitis (NEC), and need for blood transfusions. * **Side Effect:** A slight increase in the risk of **neonatal jaundice** requiring phototherapy. * **Positioning:** The infant should be held at or slightly below the level of the introitus/placenta to facilitate gravity-assisted flow.

Q: What is the most common cause of respiratory distress in preterm infants?

Hyaline membrane disease. **Explanation:** **Hyaline Membrane Disease (HMD)**, also known as **Respiratory Distress Syndrome (RDS)**, is the most common cause of respiratory distress in preterm infants. The underlying pathophysiology is a **deficiency of surfactant**, which is produced by Type II pneumocytes. Surfactant normally reduces surface tension within the alveoli; its absence leads to widespread alveolar collapse (atelectasis), decreased lung compliance, and impaired gas exchange. The risk is inversely proportional to gestational age, primarily affecting infants born before 34 weeks. **Analysis of Incorrect Options:** * **Pneumonia:** While a significant cause of neonatal respiratory distress (especially in cases of prolonged rupture of membranes), it is less common than HMD in the immediate preterm period. * **Low Birth Weight:** This is a physical description/category, not a specific clinical diagnosis or cause of respiratory distress. * **Hydrocephalus:** This is a neurological condition involving excess cerebrospinal fluid. While severe cases can cause secondary respiratory depression via brainstem pressure, it is not a primary cause of respiratory distress. **High-Yield Clinical Pearls for NEET-PG:** * **X-ray Findings:** Characterized by a "Ground Glass Appearance" and "Air Bronchograms." * **L/S Ratio:** A Lecithin/Sphingomyelin ratio of **<2:1** in amniotic fluid indicates lung immaturity. * **Prevention:** Antenatal corticosteroids (e.g., Dexamethasone or Betamethasone) given to the mother 24–48 hours before preterm delivery significantly reduce the incidence of HMD. * **Treatment:** The definitive treatment is exogenous surfactant replacement therapy (e.g., via the INSURE technique).

Q: In normal delivery, when should breastfeeding be initiated?

Within 1/2 hour after delivery. **Explanation:** The initiation of breastfeeding is a critical step in neonatal care. According to the **World Health Organization (WHO)** and **UNICEF (Baby-Friendly Hospital Initiative)** guidelines, breastfeeding should be initiated as soon as possible after birth, ideally **within 30 minutes (1/2 hour)** for a normal vaginal delivery. **Why Option A is Correct:** Early initiation takes advantage of the newborn’s "quiet alert state," which typically occurs in the first hour of life. During this period, the sucking reflex is most intense. Early skin-to-skin contact and suckling stimulate the release of **oxytocin** in the mother (aiding uterine contraction and preventing postpartum hemorrhage) and **prolactin** (promoting milk production). It also ensures the infant receives **colostrum**, which is rich in antibodies and growth factors. **Why Options B, C, and D are Incorrect:** Delaying breastfeeding by 2, 4, or 6 hours increases the risk of neonatal hypoglycemia, hypothermia, and failure to establish successful long-term lactation. Delays also increase the likelihood of the infant being given pre-lacteal feeds (like honey or glucose water), which can introduce infections and interfere with the gut microbiome. **High-Yield Clinical Pearls for NEET-PG:** * **Cesarean Section:** Breastfeeding should be initiated as soon as the mother is conscious and stable, usually within **4 hours**. * **Colostrum:** Produced in the first 2–3 days; it is thick, yellow, and high in Vitamin A, sodium, chloride, and **IgA**. * **Exclusive Breastfeeding:** Recommended for the first **6 months** of life. * **Rooting Reflex:** This is the cue to look for; it is strongest immediately after birth.

Q: A neonate is suspected to be suffering from necrotizing enterocolitis (NEC). On further examination and investigation, he is diagnosed to be Bell's stage I NEC. What is the management of choice?

Conservative management with IV fluids and antibiotics. **Explanation:** Necrotizing Enterocolitis (NEC) is the most common gastrointestinal emergency in neonates, primarily affecting preterm infants. Management is strictly guided by the **Modified Bell’s Staging Criteria**, which categorizes the severity based on clinical and radiological findings. **Why Option C is Correct:** **Bell’s Stage I (Suspected NEC)** is characterized by non-specific systemic signs (lethargy, apnea), mild gastrointestinal symptoms (abdominal distension, occult blood in stools), and normal or non-specific radiographs. At this early stage, the bowel wall is intact, and there is no perforation. The standard of care is **conservative management**, which includes: * NPO (Nil Per Oral) status to rest the bowel. * Nasogastric decompression. * Intravenous fluids and parenteral nutrition. * Empiric systemic antibiotics for 3–7 days. **Why Other Options are Incorrect:** * **Option A & B:** Surgical interventions like laparotomy or peritoneal drainage are reserved for **Stage III (Advanced NEC)**, specifically when there is evidence of intestinal perforation (pneumoperitoneum) or clinical deterioration despite maximal medical therapy. * **Option D:** There is no "mandatory" 24-hour delayed laparotomy. Surgery is indicated only if the patient fails to respond to medical management or develops signs of gangrene/perforation. **High-Yield Clinical Pearls for NEET-PG:** * **Bell’s Stage II (Proven NEC):** Characterized by **Pneumatosis intestinalis** (gas in the bowel wall) on X-ray. Management remains medical but with longer antibiotic courses (7–14 days). * **Bell’s Stage III (Advanced NEC):** Characterized by **Pneumoperitoneum** (Rigler’s sign/Football sign) or portal venous gas. * **Absolute Indication for Surgery:** Pneumoperitoneum (perforation). * **Most common site:** Terminal ileum and proximal colon.

Question 1

Gynecomastia in neonates is typically caused by which of the following?

Accepted Answer

Maternal estrogen exposure

Answer

Maternal progesterone exposure

Answer

Gonadotropin-releasing hormone (GnRH)

Answer

Fetal gonadotropins

Question 2

A premature baby of 34 weeks gestation was delivered and subsequently developed bullous lesions on the skin. Radiographic examination revealed periostitis. What is the most appropriate next investigation?

Accepted Answer

VDRL for mother and baby

Answer

ELISA for HIV

Answer

PCR for TB

Answer

Hepatitis B surface antigen for mother

Question 3

Cord cutting should be delayed in which condition?

Accepted Answer

Severe anemia

Answer

IUGR

Answer

Rh incompatibility

Answer

Asphyxia

Question 4

A neonate presents with extensor posture at 8 days of age. What is the most likely diagnosis?

Accepted Answer

Malnutrition

Answer

Cerebral palsy

Answer

Hypoxic ischemic encephalopathy

Answer

Infection

Question 5

Which of the following is an abnormal finding in a neonate?

Accepted Answer

Bacteriuria

Answer

Glycosuria

Answer

WBCs in urine

Answer

Hyperbilirubinemia

Question 6

A newborn is noted to be jaundiced at 3 days of age. Which of the following factors is associated with an increased risk of neurologic damage in a jaundiced newborn?

Accepted Answer

Neonatal sepsis

Answer

Increased attachment of bilirubin to binding sites caused by drugs such as sulfisoxazole

Answer

Hyperalbuminemia

Answer

Maternal ingestion of Phenobarbital during pregnancy

Question 7

What is the most common cause of respiratory distress in preterm infants?

Accepted Answer

Hyaline membrane disease

Answer

Pneumonia

Answer

Low birth weight

Answer

Hydrocephalus

Question 8

In normal delivery, when should breastfeeding be initiated?

Accepted Answer

Within 1/2 hour after delivery

Answer

2 hours after delivery

Answer

4 hours after delivery

Answer

6 hours after delivery

Question 9

Small for date newborns do not include which of the following?

Accepted Answer

Preterm low birth weight

Answer

Term low birth weight

Answer

Post-term low birth weight

Answer

Intrauterine growth restriction

Question 10

A neonate is suspected to be suffering from necrotizing enterocolitis (NEC). On further examination and investigation, he is diagnosed to be Bell's stage I NEC. What is the management of choice?

Accepted Answer

Conservative management with IV fluids and antibiotics

Answer

Laparotomy and proceed

Answer

Incision of bilateral pelvic drains

Answer

Initial conservative management and laparotomy after 24 hours

Neonatology — MCQs

Neonatology — MCQs

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