Neonatology Practice Questions

Q: Which of the following is NOT a way to prevent intraventricular hemorrhage in a preterm neonate?

Avoiding high FiO2 during mechanical ventilation. **Explanation:** Intraventricular Hemorrhage (IVH) in preterm neonates primarily originates in the **germinal matrix**, a highly vascularized but fragile area with poor structural support. The pathogenesis is largely driven by **fluctuations in cerebral blood flow** in a brain that lacks effective autoregulation. **Why Option D is the correct answer:** While high FiO2 (hyperoxia) is a significant risk factor for **Retinopathy of Prematurity (ROP)** and **Bronchopulmonary Dysplasia (BPD)**, it is not directly implicated in the causation of IVH. IVH is more closely linked to hemodynamic instability and hypercapnia (which causes cerebral vasodilation) rather than oxygen concentration itself. **Analysis of incorrect options:** * **Antenatal Steroids (A):** These are the most effective preventive measure. They accelerate lung maturity (reducing the need for aggressive ventilation) and stabilize the germinal matrix vasculature. * **Minimal and Gentle Handling (B):** Stress, pain, and excessive handling cause surges in blood pressure. In a preterm infant with "pressure-passive" cerebral circulation, these surges lead to rupture of the fragile germinal matrix vessels. * **Avoiding Rapid Fluid Boluses (C):** Rapid infusions of hypertonic solutions or volume boluses cause sudden increases in cerebral venous pressure and blood flow, which can trigger hemorrhage. **Clinical Pearls for NEET-PG:** * **Screening:** All neonates <32 weeks gestation should undergo a **Screening Cranial Ultrasound (USG)**, typically between days 3–7 of life. * **Timing:** 90% of IVH occurs within the first 72 hours of life. * **Classification:** Papile’s Classification (Grades I-IV) is used to grade severity based on USG findings. * **Prevention:** Delayed cord clamping (for 30–60 seconds) is also a proven strategy to reduce IVH by improving hemodynamic stability.

Q: A female newborn presents with vaginal bleeding four days after birth. What is the appropriate management?

Wait and watch. **Explanation:** The clinical presentation of vaginal bleeding in a newborn female around the 3rd to 5th day of life is a physiological phenomenon known as **Neonatal Pseudo-menses**. **Why "Wait and Watch" is Correct:** During pregnancy, high levels of maternal estrogens cross the placenta and enter the fetal circulation, causing hypertrophy of the neonatal endometrial lining. After birth, the sudden withdrawal of these maternal hormones leads to the shedding of the endometrial lining, resulting in self-limiting vaginal bleeding. This is a normal physiological process and requires no intervention other than parental reassurance. **Why Other Options are Incorrect:** * **B & C (Clotting factors/Bleeding time):** These investigations are unnecessary because the bleeding is hormonal, not a result of a coagulopathy. In a healthy neonate who has received Vitamin K at birth and shows no other sites of bleeding (e.g., umbilical cord, GI tract), a bleeding disorder is highly unlikely. * **D (Blood transfusion):** The amount of blood loss in pseudo-menses is minimal (spotting) and does not cause hemodynamic instability or anemia. **High-Yield Clinical Pearls for NEET-PG:** * **Timing:** Typically occurs between days 3 and 7 of life. * **Associated Findings:** May be accompanied by physiological breast engorgement (in both sexes) and "Witch’s milk" secretion due to the same hormonal withdrawal mechanism. * **Management:** Always conservative. If bleeding persists beyond the first week or is excessive, only then should local trauma or hemorrhagic disease of the newborn be considered.

Q: The sole of a newborn baby is suggestive of what condition?

Prematurity. ***Prematurity*** - **Plantar creases** on the sole are a key component of the **Ballard Score** for assessing gestational age; premature babies have **smooth soles** with absent or minimal creases. - A **lack of plantar creases** or only anterior transverse creases indicates gestational age **less than 37 weeks**, as creases develop progressively with maturity. *Neonatal jaundice* - Jaundice presents as **yellowing of skin and sclera** due to elevated bilirubin levels, not changes in plantar surface appearance. - The **sole appearance** is not a diagnostic feature of neonatal jaundice, which is assessed through skin color and bilirubin levels. *Large for date baby* - Large for gestational age (LGA) babies are defined by **birth weight above 90th percentile** for gestational age, not sole appearance. - **Plantar creases** reflect gestational maturity rather than fetal growth patterns or birth weight percentiles. *Term baby* - A **term baby** (37-42 weeks gestation) would have **well-developed plantar creases** covering the entire sole surface. - **Deep creases** extending from heel to toe indicate **full-term maturity**, opposite to the smooth sole described in the question.

Q: All of the following are congenital infections EXCEPT:

Gonorrhea. The core concept in this question is the distinction between **congenital (transplacental)** infections and **perinatal (birth canal)** infections. ### **Why Gonorrhea is the Correct Answer** **Gonorrhea** (caused by *Neisseria gonorrhoeae*) is not a congenital infection because it does not cross the placenta to infect the fetus in utero. Instead, it is a **perinatal infection** acquired during delivery as the neonate passes through an infected birth canal. It typically manifests as **Ophthalmia Neonatorum** (purulent conjunctivitis) within 2–5 days of birth. ### **Why the Other Options are Incorrect** Options A, B, and C are classic components of the **TORCH complex**, which are infections transmitted **transplacentally** from mother to fetus: * **Rubella:** Causes Congenital Rubella Syndrome (CRS), characterized by the triad of cataracts, sensorineural deafness, and congenital heart disease (PDA). * **Cytomegalovirus (CMV):** The most common congenital infection. It typically presents with periventricular calcifications, microcephaly, and sensorineural hearing loss. * **Toxoplasmosis:** Caused by *Toxoplasma gondii*, it presents with the classic triad of chorioretinitis, hydrocephalus, and intracranial (diffuse) calcifications. ### **NEET-PG High-Yield Pearls** * **TORCH acronym:** **T**oxoplasmosis, **O**thers (Syphilis, HIV, HBV, VZV, Parvovirus B19), **R**ubella, **C**MV, and **H**erpes Simplex (HSV-2). * **Calcification Tip:** CMV = **P**eriventricular calcifications; Toxoplasmosis = **D**iffuse/Scattered calcifications. * **Ophthalmia Neonatorum Timing:** Chemical (24 hrs) < Gonococcal (2–5 days) < Chlamydial (5–14 days). * **Treatment:** Ceftriaxone is the drug of choice for neonatal gonococcal conjunctivitis.

Q: A mother has been infected with rubella during pregnancy. Which of the following fetal congenital malformations can occur?

Pulmonary Stenosis (PS). **Explanation:** Congenital Rubella Syndrome (CRS) is a classic TORCH infection that occurs due to transplacental transmission of the Rubella virus, primarily during the first trimester. The virus causes vasculitis and inhibits mitosis, leading to multi-organ defects. **Why Pulmonary Stenosis (PS) is the correct answer:** While **Patent Ductus Arteriosus (PDA)** is the most common cardiac lesion overall in CRS, **Peripheral Pulmonary Artery Stenosis (PPS)** is the most characteristic and specific structural malformation associated with the syndrome. In many standardized exams, if both are present, PS (specifically peripheral) is frequently tested as the hallmark lesion. The virus directly damages the vascular endothelium of the pulmonary arteries during organogenesis. **Analysis of Incorrect Options:** * **A & B (VSD and ASD):** While these are common congenital heart defects in the general population, they are not classically associated with Congenital Rubella Syndrome. * **D (Patent Ductus Arteriosus):** Although PDA is the **most frequent** cardiac defect in CRS, it is often considered a "functional" failure of closure. In the context of this specific question format, Pulmonary Stenosis is often prioritized as the definitive structural malformation. **NEET-PG High-Yield Pearls:** * **Gregg’s Triad:** The classic presentation of CRS includes **Cataracts** (salt and pepper retinopathy), **Sensorineural Hearing Loss** (most common finding), and **Cardiac defects** (PDA/PS). * **"Blueberry Muffin" Rash:** Represents extramedullary hematopoiesis. * **Timing:** Risk is highest (up to 80%) if maternal infection occurs within the first 12 weeks of gestation. * **Diagnosis:** Confirmed by Rubella-specific IgM in the newborn or persistent IgG titers beyond 6 months.

Q: Vomiting on the first day of a baby's life can be caused by all of the following except?

Pyloric stenosis. **Explanation:** The correct answer is **A. Pyloric Stenosis**. **1. Why Pyloric Stenosis is the correct answer:** Infantile Hypertrophic Pyloric Stenosis (IHPS) typically presents between **3 to 6 weeks** of life. It is extremely rare for it to cause vomiting on the first day of life because the hypertrophy of the pyloric muscle takes time to develop and cause a complete gastric outlet obstruction. The classic presentation is non-bilious, projectile vomiting in a "hungry feeder." **2. Analysis of Incorrect Options:** * **Oesophageal Atresia:** This presents immediately after birth with excessive salivation, drooling, and choking or vomiting during the very first feed. * **Aerophagy:** Air swallowing during feeding is a common cause of "spitting up" or mild vomiting in the early neonatal period. * **Amniotic Gastritis:** This occurs when the fetus swallows blood-stained or infected amniotic fluid during labor. The gastric irritation leads to vomiting within the first 24 hours of life. **3. High-Yield Clinical Pearls for NEET-PG:** * **Pyloric Stenosis:** Look for the "Olive-shaped mass" on palpation and the "String sign" on barium swallow. The metabolic abnormality is **Hypochloremic, Hypokalemic Metabolic Alkalosis**. * **Bilious Vomiting on Day 1:** Always suspect distal obstructions like Duodenal Atresia (associated with Down Syndrome and the "Double Bubble" sign) or Malrotation with Volvulus. * **Tracheoesophageal Fistula (TEF):** The most common type is Type C (Esophageal atresia with distal TEF). Diagnosis is confirmed by the inability to pass a firm nasogastric tube into the stomach.

Question 1

Which of the following is NOT a way to prevent intraventricular hemorrhage in a preterm neonate?

Accepted Answer

Avoiding high FiO2 during mechanical ventilation

Answer

Antenatal steroid use

Answer

Minimal and gentle handling

Answer

Avoiding rapid fluid boluses

Question 2

A 4-week-old newborn presents with jaundice and clay-white stools. A liver biopsy shows giant cells with ballooning degeneration of the cytoplasm. What is the most likely diagnosis?

Accepted Answer

Neonatal hepatitis with extra-hepatic biliary atresia

Answer

Physiological jaundice

Answer

Neonatal hepatitis with physiological jaundice

Answer

Extra-hepatic biliary atresia

Question 3

A female newborn presents with vaginal bleeding four days after birth. What is the appropriate management?

Accepted Answer

Wait and watch

Answer

Clotting factor deficiency to be ruled out

Answer

Bleeding time to be performed

Answer

Blood transfusion

Question 4

The sole of a newborn baby is suggestive of what condition?

Accepted Answer

Prematurity

Answer

Neonatal jaundice

Answer

Large for date baby

Answer

Term baby

Question 5

Unconjugated hyperbilirubinemia of the newborn is caused by all of the following EXCEPT:

Accepted Answer

Septicemia

Answer

Criglar-Najjar syndrome

Answer

Cretinism

Answer

Breast milk jaundice

Question 6

All of the following are congenital infections EXCEPT:

Accepted Answer

Gonorrhea

Answer

Rubella

Answer

Cytomegalovirus (CMV)

Answer

Toxoplasmosis

Question 7

A mother has been infected with rubella during pregnancy. Which of the following fetal congenital malformations can occur?

Accepted Answer

Pulmonary Stenosis (PS)

Answer

Ventricular Septal Defect (VSD)

Answer

Atrial Septal Defect (ASD)

Answer

Patent Ductus Arteriosus (PDA)

Question 8

Vomiting on the first day of a baby's life can be caused by all of the following except?

Accepted Answer

Pyloric stenosis

Answer

Oesophageal atresia

Answer

Aerophagy

Answer

Amniotic gastritis

Question 9

Late onset hemorrhagic disease of the newborn is characterized by all of the following features except?

Accepted Answer

Usually occurs in exclusively breastfed babies

Answer

Onset occurs at 4-12 weeks of age

Answer

Intracranial hemorrhage can occur

Answer

Intramuscular vitamin K prophylaxis at birth has a protective role

Question 10

A patient was induced for being post-term at 42 3/7 weeks. Immediately following the delivery, you examine the baby and note the following on physical exam: a small amount of cartilage in the earlobe, occasional creases over the anterior two-thirds of the soles of the feet, 4-mm breast nodule diameter, fine and fuzzy scalp hair, and a scrotum with some but not extensive rugae. Based on this physical exam, what is the approximate gestational age of this male infant?

Accepted Answer

38 weeks

Answer

33 weeks

Answer

36 weeks

Answer

42 weeks

Neonatology — MCQs

Neonatology — MCQs

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