Neonatology — MCQs
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All of the following are features of prematurity in a neonate, except which of the following?
In which condition do symptoms improve with crying?
Which of the following is the most practical method for transporting a newborn while maintaining a warm temperature, especially in resource-limited settings?
Which of the following statements about Kernicterus is TRUE?
Which of the following is NOT a characteristic of caput succedaneum?
What is the APGAR score for a baby that grimaces in response to stimulation?
Which of the following is a common symptom of neonatal lupus?
A 24-day-old neonate presents with projectile vomiting and failure to gain weight. What is the most likely diagnosis?
Maximum concentration of dextrose that can be given through peripheral vascular line in neonate?
What is the PRIMARY pathophysiological mechanism underlying the most common cause of neonatal hyperbilirubinemia?
Neonatology Indian Medical PG Practice Questions and MCQs
Question 891: All of the following are features of prematurity in a neonate, except which of the following?
- A. Abundant lanugo
- B. Thick ear cartilage (Correct Answer)
- C. Empty scrotum
- D. No creases on sole
Explanation: ***Thick ear cartilage*** - **Thick ear cartilage with well-formed incurving of the pinna** is a feature of a **mature** or **full-term** neonate. - In premature neonates, the ear cartilage is typically **thin, soft, and flexible**, with less developed incurving. *Abundant lanugo* - **Lanugo**, fine soft hair, is typically abundant on the back and shoulders of **premature neonates**. - This hair is often shed by full-term babies before or shortly after birth. *Empty scrotum* - An **empty scrotum** indicates undescended testes, which is common in **premature male neonates**. - Testicular descent typically occurs later in gestation. *No creases on sole* - The absence or scarcity of **creases on the sole of the foot** is characteristic of **premature neonates**. - As gestational age increases, the number and depth of plantar creases increase.
Question 892: In which condition do symptoms improve with crying?
- A. Tetralogy of Fallot
- B. Choanal atresia (Correct Answer)
- C. Bronchial asthma
- D. None of the options
Explanation: ***Choanal atresia*** - In **bilateral choanal atresia**, a newborn is unable to breathe through the nose due to a bony or membranous obstruction. Symptoms like **cyanosis** worsen with feeding and improve with crying because crying involves **mouth breathing**, which bypasses the nasal obstruction. - This condition is a **medical emergency** as newborns are obligate nasal breathers, and immediate intervention (e.g., oral airway, surgical repair) is often required. *Tetralogy of Fallot* - This congenital heart defect can lead to **cyanotic spells** (hypercyanotic or "tet" spells), which are characterized by increased cyanosis, tachypnea, and irritability. These spells are often precipitated by activities that increase right-to-left shunting, and **crying can worsen them** rather than improve them due to increased systemic oxygen demand and vascular resistance. - Management often involves positioning (knee-chest) and medications to reduce pulmonary vascular resistance or increase systemic vascular resistance, to alleviate shunting. *Bronchial asthma* - **Crying is a common trigger for asthma attacks** in children, as it can induce bronchoconstriction due to hyperventilation and airway irritation. Symptoms typically worsen with crying, leading to **wheezing, coughing, and shortness of breath**. - Asthma is characterized by **reversible airway obstruction** and airway hyperresponsiveness, and its symptoms do not improve with crying. *None of the options* - This option is incorrect because **choanal atresia** is a condition where symptoms (specifically cyanosis) do improve with crying due to the switch from nasal to mouth breathing.
Question 893: Which of the following is the most practical method for transporting a newborn while maintaining a warm temperature, especially in resource-limited settings?
- A. Kangaroo Mother Care (KMC) (Correct Answer)
- B. Transport incubator
- C. Insulated box (e.g., Thermacol box)
- D. Warm water bag
Explanation: ***Kangaroo Mother Care (KMC)*** - KMC involves continuous **skin-to-skin contact** between the newborn and the caregiver, which is highly effective in maintaining the infant's temperature through direct body warmth transfer. - It is a **low-cost**, easily accessible method, making it particularly practical and sustainable in **resource-limited settings**. - KMC is endorsed by **WHO** as an evidence-based intervention for thermal care of low birth weight and preterm infants. *Transport incubator* - While effective for maintaining temperature, a transport incubator is **expensive**, requires electricity or specialized batteries, and is not readily available in many resource-limited settings. - The use of an incubator requires **trained personnel** for operation and maintenance, making it less practical for widespread use in such environments. *Insulated box (e.g., Thermacol box)* - An insulated box can provide some thermal insulation, but it lacks an **active heating mechanism** and does not provide tactile stimulation or bonding benefits. - The temperature inside can still fluctuate significantly, and it does not allow for **continuous monitoring** of the newborn, increasing the risk of overheating or hypothermia if not managed carefully. *Warm water bag* - A warm water bag can provide localized warmth but carries a significant risk of **burns** if the water is too hot or if the bag leaks. - Its warming effect is also **temporary** and not evenly distributed, making it less reliable for maintaining stable body temperature during prolonged transport.
Question 894: Which of the following statements about Kernicterus is TRUE?
- A. Prematurity is the primary cause of Kernicterus
- B. Kernicterus is due to Unconjugated Hyperbilirubinemia (Correct Answer)
- C. Kernicterus is not associated with increased morbidity.
- D. Yellowish staining occurs primarily in the Cerebellum in Kernicterus
Explanation: ***Kernicterus is due to Unconjugated Hyperbilirubinemia*** - **Kernicterus** is a rare but severe neurological condition caused by **high levels of unconjugated bilirubin** in a newborn's blood. - **Unconjugated bilirubin** is lipophilic and can cross the **blood-brain barrier**, particularly when levels are excessively high or the barrier is compromised. *Prematurity is the primary cause of Kernicterus* - **Prematurity** is a **major risk factor** for kernicterus, as premature infants have immature livers, reduced albumin binding sites, and a less developed blood-brain barrier. - However, the primary cause is the **unconjugated hyperbilirubinemia** itself, which can occur in both term and preterm infants, though it is more common and severe in prematures. *Yellowish staining occurs primarily in the Cerebellum in Kernicterus* - While kernicterus does affect the **cerebellum**, the **primary and most characteristic sites** of bilirubin deposition are the **basal ganglia**, hippocampus, and brainstem nuclei. - The **basal ganglia** are the predominant target, not the cerebellum, making this statement anatomically incorrect. *Kernicterus is not associated with increased morbidity.* - Kernicterus is associated with **significant morbidity** and can lead to permanent neurological damage, including **cerebral palsy**, hearing loss, intellectual disabilities, and gaze abnormalities. - It is a medical emergency that requires prompt diagnosis and treatment to prevent long-term neurological sequelae.
Question 895: Which of the following is NOT a characteristic of caput succedaneum?
- A. Crosses the suture line
- B. Crosses midline
- C. It does not disappear within 2-3 days (Correct Answer)
- D. It is a diffuse edematous swelling of the soft tissues of the scalp
Explanation: ***It does not disappear within 2-3 days*** - Caput succedaneum is a benign condition that typically resolves within **2 to 3 days** after birth as the edema is reabsorbed. - Therefore, a characteristic of caput succedaneum is that it *does* disappear relatively quickly, making the statement that it "does not disappear within 2-3 days" incorrect. *Crosses midline* - Caput succedaneum is a **diffuse swelling** that extends across the scalp and is **not limited by anatomical boundaries** like the midline of the skull. - This characteristic helps differentiate it from a **cephalohematoma**, which is typically confined to one side of the head. *Crosses the suture line* - The edema of caput succedaneum is in the **soft tissues superficial to the periosteum**, allowing it to **cross the suture lines** of the skull. - This is a key differentiating feature from a **cephalohematoma**, which is a subperiosteal hemorrhage and therefore confined by suture lines. *It is a diffuse edematous swelling of the soft tissues of the scalp* - This statement accurately describes caput succedaneum as a **collection of serosanguineous fluid** and **edema** in the most superficial layers of the scalp. - It results from pressure on the fetal scalp during labor, leading to **venous congestion** and extravasation of fluid.
Question 896: What is the APGAR score for a baby that grimaces in response to stimulation?
- A. 0
- B. 1 (Correct Answer)
- C. 2
- D. 3
Explanation: ***1*** - A score of **1** is given for **grimace** in response to stimulation, indicating some reflex irritability but not a vigorous cry or sneeze. - This response shows a minimal protective reflex, suggesting the baby is not completely flaccid but also not optimally responsive. - The APGAR scoring for reflex irritability ranges from 0 to 2, with grimacing specifically scoring **1 point**. *0* - A score of **0** for reflex irritability is reserved for **no response** or **complete absence** of reflexes. - This would indicate a severely depressed neurological state, unlike the grimace observed. *2* - A score of **2** for reflex irritability is given for a **vigorous cry**, **sneeze**, **cough**, or **active withdrawal** from stimulation. - A grimace is a less robust response than these, thus not warranting a score of 2. *3* - The APGAR scoring system uses a **0-2 scale** for each of the five components (Appearance, Pulse, Grimace, Activity, Respiration). - The maximum score for any single component is **2**, making 3 an invalid score. - Total APGAR scores range from 0-10, but individual components never exceed 2.
Question 897: Which of the following is a common symptom of neonatal lupus?
- A. All of the options
- B. Cutaneous lesion (Correct Answer)
- C. Thrombocytopenia
- D. Heart block
Explanation: ***Cutaneous lesion*** - **Cutaneous lesions** are the most common manifestation of neonatal lupus, typically appearing as an **annular erythematous rash** on the face and scalp. - These lesions often develop after exposure to **ultraviolet light** and usually resolve within 6 months as maternal autoantibodies clear from the infant's system. *Thrombocytopenia* - While **hematologic abnormalities** such as thrombocytopenia can occur in neonatal lupus, they are less common than cutaneous lesions. - **Thrombocytopenia** refers to a low platelet count, which can increase the risk of bleeding. *All of the options* - While all listed options (cutaneous lesions, thrombocytopenia, and heart block) can be features of neonatal lupus, **cutaneous lesions** are the most frequently observed symptom. - Choosing "All of the options" would imply equal commonality or presence of all in every case, which is not accurate. *Heart block* - **Congenital heart block** is a serious, but less common and often irreversible, manifestation of neonatal lupus, caused by maternal antibodies attacking the fetal cardiac conduction system. - It usually presents as **bradycardia** and may require a pacemaker, but it is not the most common symptom overall.
Question 898: A 24-day-old neonate presents with projectile vomiting and failure to gain weight. What is the most likely diagnosis?
- A. NEC
- B. Duodenal atresia
- C. Hirschsprung's disease
- D. Congenital Hypertrophic Pyloric Stenosis (Correct Answer)
Explanation: ***Congenital Hypertrophic Pyloric Stenosis*** - The classic presentation includes **projectile, non-bilious vomiting** in a neonate around 2-8 weeks old, leading to **failure to thrive**. - An **olive-shaped mass** (hypertrophied pylorus) may be palpable in the epigastrium. *NEC* - **Necrotizing enterocolitis (NEC)** is an inflammatory disease of the intestine, primarily affecting premature infants. - Symptoms typically include **abdominal distension**, bloody stools, and lethargy, rather than projectile vomiting. *Duodenal atresia* - Presents with **bilious vomiting** within the first 24-48 hours of life due to an obstruction below the ampulla of Vater. - An X-ray would show a **"double bubble" sign**, which is not implied by the provided symptoms. *Hirschsprung's disease* - Characterized by **failure to pass meconium** within the first 24-48 hours and chronic constipation. - Vomiting, if present, is usually **bilious** and associated with abdominal distension, not projectile in nature.
Question 899: Maximum concentration of dextrose that can be given through peripheral vascular line in neonate?
- A. 5%
- B. 10%
- C. 12.5% (Correct Answer)
- D. 25%
Explanation: ***12.5%*** - A maximum dextrose concentration of **12.5%** can typically be administered safely via a **peripheral intravenous line** in neonates. - Higher concentrations risk causing **osmotic damage** to the peripheral vein, leading to **phlebitis** and **thrombosis**. *5%* - While safe, a **5% dextrose** solution may not provide adequate caloric support for many neonates, especially those requiring significant nutritional intake. - It is used for basic hydration and to prevent hypoglycemia but often needs supplementation or higher concentrations for sustained feeding. *10%* - A **10% dextrose** solution is commonly used in neonates via peripheral lines, but concentrations up to 12.5% are generally considered the safe upper limit for extended use. - Exceeding 10% can increase the risk of phlebitis, although it is less severe than with 25%. *25%* - A **25% dextrose** concentration is highly hypertonic and should **never be administered through a peripheral line** in neonates due to the high risk of severe **phlebitis**, **vein damage**, and even **tissue necrosis** if extravasation occurs. - Such high concentrations require a **central venous catheter**.
Question 900: What is the PRIMARY pathophysiological mechanism underlying the most common cause of neonatal hyperbilirubinemia?
- A. Inefficient erythropoiesis
- B. Immature liver enzyme (Correct Answer)
- C. RBC hemolysis
- D. Decreased bilirubin excretion
Explanation: ***Immature liver enzyme*** - The most common cause of neonatal hyperbilirubinemia is **physiological jaundice**, and its PRIMARY pathophysiological mechanism is **immature hepatic conjugation** due to deficiency of **UDP-glucuronosyltransferase (UGT1A1)**. - While neonates do produce more bilirubin from RBC breakdown, the **rate-limiting step** is the liver's inability to conjugate unconjugated bilirubin efficiently for excretion. - This immaturity causes accumulation of unconjugated bilirubin, which peaks at **3-5 days of life** and resolves as the enzyme system matures by **7-10 days**. - Key clinical feature: **Unconjugated (indirect) hyperbilirubinemia** in an otherwise healthy term neonate. *RBC hemolysis* - Neonates do have a **shorter RBC lifespan** (70-90 days vs. 120 days in adults) and higher hematocrit, leading to increased bilirubin production (~2-3 times adult rate). - However, this is a **contributory factor**, not the primary mechanism—a normal liver can handle this load easily. - **Pathological hemolysis** (ABO/Rh incompatibility, G6PD deficiency, spherocytosis) causes jaundice through a different mechanism with earlier onset (<24 hours) and more severe hyperbilirubinemia. *Inefficient erythropoiesis* - Ineffective erythropoiesis (abnormal RBC production with intramedullary destruction) is seen in conditions like **thalassemia** and **megaloblastic anemia**. - This can contribute to increased bilirubin load but is not the mechanism in physiological jaundice. - In neonates, erythropoiesis is typically transitioning from fetal to adult hemoglobin but is not pathologically inefficient. *Decreased bilirubin excretion* - Decreased excretion of **conjugated bilirubin** occurs in **cholestatic conditions** (biliary atresia, neonatal hepatitis, choledochal cyst). - This results in **direct (conjugated) hyperbilirubinemia**, not the indirect hyperbilirubinemia seen in physiological jaundice. - While neonates do have relatively decreased enterohepatic circulation clearance, the primary bottleneck is conjugation, not excretion.
Practice by Chapter
Neonatal Resuscitation
Practice Questions
Care of the Normal Newborn
Practice Questions
Prematurity and Low Birth Weight
Practice Questions
Respiratory Distress Syndrome
Practice Questions
Neonatal Jaundice
Practice Questions
Neonatal Sepsis
Practice Questions
Necrotizing Enterocolitis
Practice Questions
Intraventricular Hemorrhage
Practice Questions
Persistent Pulmonary Hypertension
Practice Questions
Perinatal Asphyxia
Practice Questions
Neonatal Seizures
Practice Questions
Congenital Anomalies
Practice Questions
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