Neonatology Practice Questions

Q: A newborn presents with cyanosis that worsens with feeding and improves with crying. What is the most likely diagnosis?

Choanal Atresia. ***Choanal Atresia*** - **Cyanosis** that worsens with feeding and improves with crying is a **classic presentation** of choanal atresia, as the infant cannot breathe through the nose while suckling. - The condition is caused by the **failure of the posterior nasal passages to canalize** during fetal development. *Tetralogy of Fallot* - Characterized by **cyanotic spells** (tet spells) which are sudden, profound cyanosis and hyperpnea, often triggered by crying or feeding, but the cyanosis would not typically improve with crying. - Involves **four defects**: pulmonary stenosis, ventricular septal defect, overriding aorta, and right ventricular hypertrophy. *Transposition of Great Arteries* - Presents with **severe cyanosis at birth** that does not significantly improve with crying, as there is a fundamental separation of pulmonary and systemic circulations. - Survival depends on mixing of oxygenated and deoxygenated blood through a **patent ductus arteriosus (PDA)** or **patent foramen ovale (PFO)**. *Patent Ductus Arteriosus* - Typically presents with a **continuous "machinery-like" murmur** and signs of **heart failure**, not primarily with cyanosis that fluctuates with feeding. - This condition involves a persistent connection between the **aorta and pulmonary artery** after birth, leading to left-to-right shunting.

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

Respiratory distress syndrome. ***Respiratory distress syndrome*** - This is the most common cause of respiratory distress in **preterm infants** due to **surfactant deficiency**, leading to atelectasis. - The risk is inversely proportional to gestational age, meaning the more premature the infant, the higher the risk. *Congenital diaphragmatic hernia* - This is a rare, severe condition where abdominal organs protrude into the chest cavity, compressing the lungs. - While it causes significant respiratory distress, it is a structural anomaly and not the most common cause overall in preterm infants. *Transient tachypnea of the newborn* - This condition is caused by delayed clearance of **fetal lung fluid** and is more common in **term or late preterm infants** delivered by C-section. - It typically resolves within 24-48 hours and is generally less severe than RDS. *Meconium aspiration syndrome* - This occurs when a fetus inhales meconium (fetal stool) mixed with amniotic fluid, typically in **post-term or stressed term infants**. - It is uncommon in preterm infants because they rarely pass meconium in utero due to immature gastrointestinal motility.

Q: A preterm neonate in the NICU develops respiratory distress syndrome. What is the most likely cause of this condition?

Surfactant deficiency. ***Surfactant deficiency*** - **Respiratory distress syndrome (RDS)** in preterm neonates is primarily caused by **insufficient production of surfactant**. - **Surfactant** reduces alveolar surface tension, preventing atelectasis and ensuring adequate gas exchange. *Meconium aspiration* - This typically occurs in **term or post-term neonates** who experience fetal distress, leading to aspiration of meconium-stained amniotic fluid. - While it causes respiratory distress, it is uncommon in **preterm infants** as meconium passage is rare before term. *Congenital diaphragmatic hernia* - This is a **structural defect** where abdominal contents herniate into the chest, impairing lung development. - It would be evident on **prenatal imaging** or immediately after birth with severe respiratory distress and scaphoid abdomen. *Pulmonary hypoplasia* - This refers to **incomplete development of the lungs**, often associated with conditions like **oligohydramnios** or congenital diaphragmatic hernia. - While it causes respiratory distress, surfactant deficiency is a more direct and common cause of general RDS in preterm infants.

Q: Kangaroo Mother Care is primarily used for what purpose?

Thermal regulation. ***Thermal regulation*** - **Kangaroo Mother Care (KMC)** primarily focuses on providing **skin-to-skin contact** between the mother (or another caregiver) and the baby. - This contact helps to **maintain the infant's body temperature**, especially crucial for **premature** and **low birth weight** babies, preventing **hypothermia**. *Breastfeeding* - While KMC can facilitate and promote **successful breastfeeding** due to the close contact, it is not its primary and sole purpose. - The direct skin-to-skin contact makes it easier for the baby to root and latch, but the core benefit extends beyond feeding. *Weight monitoring* - **Weight monitoring** is an important aspect of care for newborns, particularly those with low birth weight, but it is not the main function of KMC itself. - Although babies often gain weight effectively with KMC, weight monitoring is a separate healthcare intervention. *Vaccination* - **Vaccination** is a preventative health measure administered to protect infants from infectious diseases and is completely unrelated to KMC. - KMC provides fundamental care and support, whereas vaccination is a medical procedure.

Q: A newborn with persistent jaundice and clay-colored stools who is found to have conjugated hyperbilirubinemia is most likely diagnosed with what condition?

Biliary Atresia. ***Biliary Atresia*** - **Conjugated hyperbilirubinemia** in a newborn with **persistent jaundice** and **clay-colored stools** is the classic presentation of biliary atresia. - The absence of bile flow into the intestine due to blocked bile ducts causes the stools to lose their normal color and bilirubin to accumulate in the blood. *Physiological Jaundice* - This is a **common, transient** condition in newborns, characterized by **unconjugated hyperbilirubinemia**. - It resolves spontaneously and typically presents with **normal stool color** as bile flow is unimpaired. *Breast Milk Jaundice* - This condition is also characterized by **unconjugated hyperbilirubinemia** and is generally benign. - While it can persist, it does not typically cause **clay-colored stools** or significant conjugated hyperbilirubinemia. *Hemolytic Disease of the Newborn* - This condition typically presents with **unconjugated hyperbilirubinemia** due to increased red blood cell breakdown. - Stool color would generally be normal, and there would be no direct obstruction of bile flow.

Q: A newborn presents with a bulging mass in the lumbar region. Which congenital condition is most likely?

Spina bifida. ***Spina bifida*** - A **bulging mass in the lumbar region** of a newborn is a classic presentation of **spina bifida**, specifically a **myelomeningocele**, where the spinal cord and meninges protrude through an opening in the vertebrae. - This congenital condition results from incomplete closure of the **neural tube** during fetal development. - Most commonly occurs in the **lumbosacral region** and is covered by a thin membrane. *Hydrocephalus* - While hydrocephalus can occur concurrently with spina bifida (in up to 80% of cases), it is characterized by **excess cerebrospinal fluid** in the brain, leading to an enlarged head, not a bulging mass in the lumbar region. - It would typically present with signs of **increased intracranial pressure**, such as a bulging fontanelle or rapid head growth. *Sacrococcygeal teratoma* - A **congenital tumor** arising from pluripotent cells at the coccyx, presenting as a mass in the sacrococcygeal region. - Unlike myelomeningocele, it is typically a **solid or cystic mass** that arises from the coccyx rather than a defect in the vertebral column with neural tissue protrusion. - It is the most common tumor in neonates but less common than neural tube defects. *Encephalocele* - An encephalocele involves the **protrusion of brain tissue and meninges through a defect in the skull**, typically in the occipital or frontal regions, not the lumbar spine. - It presents as a sac-like protrusion on the head and is another form of neural tube defect affecting the cranial region.

Q: A newborn is noted to have micrognathia, glossoptosis, and a cleft soft palate. Which syndrome is this presentation most consistent with?

Pierre Robin sequence. ***Pierre Robin sequence*** - This is a classic **sequence** (not a syndrome) characterized by the triad of **micrognathia**, **glossoptosis** (posterior displacement of the tongue), and a **cleft soft palate**. - The small jaw (micrognathia) causes the tongue to fall back, which in turn prevents the palate from closing, leading to a cleft. - This represents a cascade of developmental events stemming from the primary anomaly of mandibular hypoplasia. *Down syndrome* - Characterized by **trisomy 21**, presenting with distinct facial features such as a flattened nasal bridge, upward-slanting eyes, and a single palmar crease. - While a **cleft palate** can occur, the combination with **micrognathia** and **glossoptosis** is not typically the primary diagnostic triad for Down syndrome. *Turner syndrome* - This is a chromosomal disorder (45, X) affecting females, characterized by features like **short stature**, **webbed neck**, and **ovarian dysgenesis**. - It does not primarily involve the oral-facial triad of micrognathia, glossoptosis, and cleft palate. *Marfan syndrome* - An inherited disorder of connective tissue, primarily affecting the skeletal, ocular, and cardiovascular systems. - Key features include **tall stature**, **long limbs and fingers (arachnodactyly)**, **pectus excavatum**, and **aortic root dilation**. It does not typically present with the specific oral malformations described.

Q: A newborn presents with microcephaly, jaundice, and hepatosplenomegaly. The mother experienced a flu-like illness during pregnancy. What is the most likely diagnosis?

Congenital cytomegalovirus infection. ***Congenital cytomegalovirus infection*** - **Microcephaly**, **jaundice**, and **hepatosplenomegaly** are classic signs of congenital CMV infection due to widespread organ damage. - The mother's flu-like illness during pregnancy is a common symptom of **primary CMV infection**, which is often asymptomatic or mild in adults. *Congenital rubella syndrome* - While it can cause **microcephaly** and **hepatosplenomegaly**, **jaundice** is less prominent, and the classic triad often includes **cataracts**, **cardiac defects** (e.g., patent ductus arteriosus), and **sensorineural hearing loss**. - The maternal illness would typically be characterized by a **rash** rather than just flu-like symptoms. *Congenital syphilis* - Can cause **hepatosplenomegaly** and **jaundice**, but **microcephaly** is not a typical feature. - Characteristic findings usually include **snuffles**, **bone abnormalities** (e.g., periostitis), and a **maculopapular rash**, which are not mentioned. *Neonatal sepsis* - Can present with **jaundice** and **hepatosplenomegaly**, and in severe cases, neurological involvement leading to symptoms like poor feeding or lethargy, but **microcephaly** is not a direct consequence. - It usually presents acutely in the postnatal period and is not directly linked to a maternal flu-like illness in pregnancy in the same way congenital infections are.

Q: A newborn after prolonged labour is not breathing well and after 30 seconds of receiving 100% oxygen by bag and mask, heart rate is 88 beats per minute. What is the next step in management?

Continue oxygen and ventilation. ***Continue oxygen and ventilation*** - A **heart rate less than 100 beats per minute** in a newborn needing resuscitation indicates ongoing compromise, mandating continued positive pressure ventilation. - The goal is to achieve a heart rate above 100 bpm, regular breathing, and improving oxygen saturation, which requires continued support. *Discontinue oxygen and ventilation* - This action would be appropriate only if the newborn's heart rate was **above 100 bpm** and they were breathing effectively. - Discontinuing support when the heart rate is 88 bpm would lead to further deterioration and potentially irreversible harm. *Discontinue oxygen, continue ventilation* - Reducing oxygen to room air might be considered if the newborn's **heart rate improves** and oxygen saturations are appropriate, but not when the heart rate is still below 100 bpm. - Continuing ventilation without adequate oxygen when indicated could be detrimental, as the goal is to improve oxygen delivery to tissues. *Start chest compressions* - Chest compressions are indicated when the newborn's heart rate remains **below 60 beats per minute** despite 30 seconds of effective positive pressure ventilation. - In this scenario, the heart rate is 88 bpm, which is above the threshold for initiating chest compressions but still requires continued ventilatory support.

Q: Which of the following is the most characteristic feature of cephalhematoma?

Typically does not cross the suture lines.. ***Typically does not cross the suture lines*** - A **cephalhematoma** is a collection of blood between the skull bone and its periosteum, which is firmly attached at the **suture lines**. - This anatomical boundary prevents the blood from spreading across the sutures, resulting in a swelling that is **confined to a single cranial bone**. - This is the **most characteristic feature** that differentiates cephalhematoma from **caput succedaneum**, which crosses suture lines. *May not be present at birth and can appear later* - While it may not always be immediately apparent, cephalhematomas typically **develop within hours of birth** and are usually visible within the **first few days**. - Their presence is almost always directly related to **birth trauma** during delivery. - However, this temporal feature is **less specific** than the anatomical confinement. *Ventouse delivery is a risk factor* - While **ventouse delivery** (vacuum extraction) is a known **risk factor** for birth trauma, including **cephalhematoma**, this statement describes an **etiological factor**, not a characteristic *feature* of the condition itself. - The question asks for the **most characteristic *feature*** of a cephalhematoma, which is its anatomical confinement to one cranial bone. *None of the options* - This option is incorrect because the statement that a cephalhematoma **does not cross suture lines** is indeed the **hallmark characteristic** of this condition.

Question 1

A newborn presents with cyanosis that worsens with feeding and improves with crying. What is the most likely diagnosis?

Accepted Answer

Choanal Atresia

Answer

Tetralogy of Fallot

Answer

Transposition of Great Arteries

Answer

Patent Ductus Arteriosus

Question 2

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

Accepted Answer

Respiratory distress syndrome

Answer

Congenital diaphragmatic hernia

Answer

Transient tachypnea of the newborn

Answer

Meconium aspiration syndrome

Question 3

A preterm neonate in the NICU develops respiratory distress syndrome. What is the most likely cause of this condition?

Accepted Answer

Surfactant deficiency

Answer

Meconium aspiration

Answer

Congenital diaphragmatic hernia

Answer

Pulmonary hypoplasia

Question 4

Kangaroo Mother Care is primarily used for what purpose?

Accepted Answer

Thermal regulation

Answer

Breastfeeding

Answer

Weight monitoring

Answer

Vaccination

Question 5

A newborn with persistent jaundice and clay-colored stools who is found to have conjugated hyperbilirubinemia is most likely diagnosed with what condition?

Accepted Answer

Biliary Atresia

Answer

Physiological Jaundice

Answer

Breast Milk Jaundice

Answer

Hemolytic Disease of the Newborn

Question 6

A newborn presents with a bulging mass in the lumbar region. Which congenital condition is most likely?

Accepted Answer

Spina bifida

Answer

Hydrocephalus

Answer

Encephalocele

Answer

Sacrococcygeal teratoma

Question 7

A newborn is noted to have micrognathia, glossoptosis, and a cleft soft palate. Which syndrome is this presentation most consistent with?

Accepted Answer

Pierre Robin sequence

Answer

Down syndrome

Answer

Turner syndrome

Answer

Marfan syndrome

Question 8

A newborn presents with microcephaly, jaundice, and hepatosplenomegaly. The mother experienced a flu-like illness during pregnancy. What is the most likely diagnosis?

Accepted Answer

Congenital cytomegalovirus infection

Answer

Congenital rubella syndrome

Answer

Congenital syphilis

Answer

Neonatal sepsis

Question 9

A newborn after prolonged labour is not breathing well and after 30 seconds of receiving 100% oxygen by bag and mask, heart rate is 88 beats per minute. What is the next step in management?

Accepted Answer

Continue oxygen and ventilation

Answer

Discontinue oxygen and ventilation

Answer

Discontinue oxygen, continue ventilation

Answer

Start chest compressions

Question 10

Which of the following is the most characteristic feature of cephalhematoma?

Accepted Answer

Typically does not cross the suture lines.

Answer

Ventouse delivery is a risk factor

Answer

May not be present at birth and can appear later.

Answer

None of the options

Neonatology — MCQs

Neonatology — MCQs

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