Neonatology Practice Questions

Q: Earliest tumour to appear after birth is?

Cystic hygroma. ***Cystic hygroma*** - A cystic hygroma is a **congenital lymphatic malformation** that is most commonly **present at birth or becomes evident in the immediate neonatal period**, making it the earliest to be clinically apparent among the given options. - It arises from sequestration of lymphatic tissue that fails to connect with the venous system, often presenting as a **soft, compressible, transilluminant mass** typically in the posterior triangle of the neck or axilla. - **60-80% are detected at birth**, and 90% by 2 years of age, making it the earliest "tumor" (though technically a malformation) to be recognized in newborns. *Sternomastoid tumour* - This is a fibrous pseudotumor (not a true neoplasm) within the **sternocleidomastoid muscle**, typically noticed at **2-4 weeks of age** following **birth trauma** or abnormal in-utero positioning. - It leads to **congenital muscular torticollis** and appears as a firm, non-tender, mobile mass in the muscle belly. - Though early, it appears **later than cystic hygroma** in the neonatal period. *Branchial cyst* - Branchial cysts are **congenital cervical anomalies** arising from remnants of the **branchial apparatus** that typically present **later in childhood or early adulthood** as they enlarge. - They are rarely symptomatic or clinically apparent at birth, often becoming evident only when infected or significantly enlarged. *Lymphoma* - Lymphomas are malignancies of lymphoid tissue that are **extremely rare in neonates** and infants. - Congenital lymphomas are exceptionally uncommon and not considered among the earliest tumors to appear after birth.

Q: A new born boy is having lumbosacral meningomyelocele and awaiting the surgical repair. The sac is best protected with sterile gauze piece soaked with

Normal saline. ***Normal saline*** - **Normal saline** creates a moist environment, which prevents the delicate neural tissue within the **meningomyelocele sac** from drying out and sustaining further damage. - Using a sterile gauze soaked in normal saline also reduces the risk of infection by providing a clean barrier until surgical repair can be performed. - This is the **standard of care** for preoperative management of meningomyelocele. *Mercurochrome* - **Mercurochrome** contains mercury, which is highly toxic and can be absorbed through the delicate membranes of the meningomyelocele sac, causing systemic toxicity. - It is an antiseptic and not ideal for maintaining the delicate neural tissue's viability due to its potential for **chemical irritation** and damage. *Methylene blue* - **Methylene blue** is primarily used as a dye or for specific medical treatments, but it is not suitable for dressing a meningomyelocele due to its potential for irritation and lack of benefit in protecting neural tissue. - It does not provide the necessary hydration and protection for the exposed neural elements and may cause a **chemical burn** or local tissue damage. *Tincture benzoin* - **Tincture benzoin** is an adhesive protectant often used to improve adhesion of bandages or to protect skin, but it is **irritating** and not sterile. - It is definitely not indicated for direct application over exposed neural tissue as it can cause significant **chemical irritation** and inflammation.

Q: Which of the following is NOT a method by which incubator heat is delivered?

Sublimation. ***Sublimation*** - **Sublimation** is the process where a solid changes directly into a gas without passing through a liquid phase (e.g., dry ice sublimating). - This is a **phase transition of matter**, NOT a mechanism of heat transfer. - Incubators do not use sublimation as a method of heat delivery. - The three methods of heat transfer are conduction, convection, and radiation - all of which are used in modern incubators. *Conduction* - Incubators DO use **conduction** to deliver heat through direct contact. - Heat is transferred from the warmed mattress and surrounding surfaces to the infant's skin. - Modern incubators are designed to provide safe conductive heating without causing burns. *Radiation* - **Radiant warmers** use infrared radiation to directly warm the infant without heating the surrounding air. - This method is particularly effective for sick neonates requiring easy access during procedures. *Convection* - Incubators use **forced convection** by circulating warm, humidified air around the infant. - This ensures **uniform temperature distribution** and maintains a stable thermal environment.

Q: In infants of diabetic mothers (IDM), when is ophthalmologic evaluation indicated?

Only if visual symptoms develop. ***Only if visual symptoms develop*** - Unlike **retinopathy of prematurity**, infants of diabetic mothers (IDMs) do not have a higher incidence of **retinopathy** or other **ocular abnormalities** at birth or in early infancy. - **Ophthalmologic evaluation** is generally reserved for IDMs who develop specific **visual symptoms** or signs of ocular pathology. *At the time of diagnosis* - Routine ophthalmologic screening at the time of diagnosis of IDM is **not standard practice**, as the risk of **congenital ocular anomalies** is not substantially elevated to warrant universal screening. - Initial management focuses on metabolic stability, especially **glucose control**, and screening for other common IDM-related complications like **cardiac defects** or **respiratory distress**. *After 5 years routinely* - There is **no evidence or recommendation** for routine ophthalmologic screening of IDMs specifically at the age of 5 years. - Regular **well-child check-ups** include basic vision screening, which would identify significant refractive errors or strabismus, but not specifically for diabetes-related ocular issues. *After developing diabetes* - While it is true that individuals with **type 1 or type 2 diabetes** require regular **ophthalmologic evaluations** for **diabetic retinopathy**, this refers to the child developing diabetes later in life, not being an IDM. - Being an IDM is a **risk factor for developing diabetes** later in life, but it doesn't automatically mean they have diabetes-related ocular issues from birth.

Q: A term infant is born to a known HIV-positive mother. She has been taking antiretroviral medications for the weeks prior to the delivery of her infant. Routine management of the healthy infant should include which of the following?

A course of zidovudine for the infant. ***A course of zidovudine for the infant*** - This is the standard of care for newborns exposed to HIV prenatally, even if the mother received **antiretroviral therapy (ART)**. - **Zidovudine (AZT)** prophylaxis significantly reduces the risk of **perinatal HIV transmission**. *HIV ELISA on the infant to determine if congenital infection has occurred* - **HIV ELISA** tests detect **maternal antibodies** passed to the infant, which can persist for up to 18 months, leading to **false positive results**. - **HIV DNA PCR** or **RNA assays** are used to diagnose HIV infection in infants. *Admission to the neonatal intensive care unit for close cardiovascular monitoring* - Admission to the **NICU** is generally reserved for **premature** or **symptomatic infants**, or those with specific complications. - A **healthy, term infant** born to an HIV-positive mother on ART does not routinely require NICU admission. *Chest radiographs to evaluate for congenital Pneumocystis carinii* - **Pneumocystis jirovecii pneumonia (PJP)** typically presents in HIV-infected infants between **3 to 6 months of age**, not at birth. - Prophylaxis with **trimethoprim-sulfamethoxazole (TMP-SMX)** is initiated at 4-6 weeks of age for HIV-exposed infants.

Q: Estimation of the blood sugar is relevant in all except –

Baby of hypothyroid mother. ***Baby of hypothyroid mother*** - While maternal hypothyroidism can affect fetal development and lead to various complications, it does not directly cause **neonatal hypoglycemia** or **hyperglycemia**, making routine blood sugar monitoring less critical unless other risk factors are present. - The primary concerns for a baby born to a hypothyroid mother are related to thyroid function itself, such as **congenital hypothyroidism**, not blood glucose dysregulation. *Large for date baby* - **Macrosomic infants**, especially those born to mothers with gestational diabetes, are at increased risk for **hypoglycemia** due to chronic fetal hyperinsulinemia. - Close monitoring of blood glucose levels is essential to prevent neurological damage from sustained low sugar. *Birth asphyxia* - Infants who experience **birth asphyxia** are under significant stress, which can deplete their glycogen stores and impair gluconeogenesis, leading to **hypoglycemia**. - Monitoring blood glucose is a critical component of their post-resuscitation care and management. *Rh Incompatibility* - Severe **Rh incompatibility** can lead to **hydrops fetalis** and other complications, including liver dysfunction and extramedullary hematopoiesis, which can impair glucose regulation. - These infants are at risk for both **hypoglycemia** due to increased metabolic demand and **hyperglycemia** secondary to stress and liver involvement, necessitating blood sugar monitoring.

Q: Which of the following is true regarding osteomyelitis in newborns?

Most common in diaphysis. ***Most common in diaphysis*** - In neonates, **osteomyelitis** frequently affects the **diaphysis and metaphysis of long bones** due to differences in vascular supply and bone structure compared to older children and adults. - The **metaphyseal growth plate** acts as a barrier in older children, but in neonates, vessels often cross this plate, allowing infection to spread into the diaphysis and epiphysis. - This is the **characteristic feature** of neonatal osteomyelitis. *Most common organism is E.coli* - The **most common causative organism** for neonatal osteomyelitis is **Staphylococcus aureus** (50-60% of cases), not *E. coli*. - *E. coli* can cause neonatal osteomyelitis but is much less frequent than *Staphylococcus aureus* or Group B Streptococcus. *The infection is unifocal* - Neonatal osteomyelitis is characteristically **multifocal** in **30-40% of cases**, meaning it affects **multiple bones** simultaneously. - This is in contrast to older children and adults, where osteomyelitis tends to be unifocal (single site). *Organisms are derived from maternal genital tract* - While **Group B Streptococcus** (the second most common organism) can be acquired from the maternal genital tract during delivery, **Staphylococcus aureus** (the most common organism) is typically acquired **postnatally** from the hospital environment, skin colonization, or via indwelling catheters. - The **primary route** for neonatal osteomyelitis is **hematogenous spread** from bacteremia, rather than direct ascending infection from the birth canal. - Since S. aureus accounts for the majority of cases and is not maternally derived, this statement is not the best characterization of neonatal osteomyelitis.

Q: Most common cause of neonatal diarrhea worldwide is:

Rotavirus. ***Rotavirus*** - **Rotavirus** is the **most common cause of severe acute diarrhea in infants and young children worldwide**, including the neonatal period. - It is responsible for significant morbidity and mortality, particularly in **developing countries** with limited access to clean water and sanitation. - The virus causes **watery diarrhea, vomiting, and dehydration**, which can be life-threatening in neonates. - **WHO** recognizes Rotavirus as the leading cause of severe diarrheal disease in children under 5 years globally. - Vaccination programs (Rotavac, Rotarix) have reduced incidence but it remains the predominant pathogen. *E. coli* - **Enteropathogenic E. coli (EPEC)** and **Enterotoxigenic E. coli (ETEC)** are important causes of neonatal diarrhea, especially in resource-limited settings. - EPEC causes diarrhea through attachment and effacement of intestinal mucosa. - ETEC is a major cause of traveler's diarrhea and endemic diarrhea in developing countries. - While significant, E. coli is the **most common bacterial cause** but not the overall most common cause when viruses are included. *Salmonella* - **Salmonella** causes gastroenteritis but is more common in **older infants and children**. - Often associated with **foodborne outbreaks**, fever, and sometimes bloody diarrhea. - Less frequent as a primary cause of neonatal diarrhea compared to Rotavirus or E. coli. *Shigella* - **Shigella** typically causes **dysentery (bloody diarrhea)** and is more common in **children over 6 months**. - Requires a lower infectious dose but is less prevalent in the immediate neonatal period. - Associated with poor hygiene and fecal-oral transmission in older children.

Q: What is the volume of reservoir bag used in neonatal resuscitation?

500 ml. ***500 ml*** - A **500 mL self-inflating bag** is the **standard size** recommended for **neonatal resuscitation** by the Neonatal Resuscitation Program (NRP). - This volume provides an adequate **oxygen reservoir** while allowing controlled delivery of appropriate **tidal volumes (4-6 mL/kg)** for neonates. - The bag volume is larger than the delivered tidal volume to ensure consistent oxygen concentration and effective ventilation without requiring perfect compression technique. *1000 ml* - A **1000 mL bag** is designed for **adult resuscitation** and is unnecessarily large for neonatal use. - While it can be used if neonatal bags are unavailable, the larger size makes it more difficult to achieve consistent, controlled ventilation in neonates. *750 ml* - A **750 mL bag** is sometimes used for older infants or pediatric patients but is larger than the standard neonatal size. - While acceptable, the **500 mL bag** is preferred for term and preterm neonates. *240 ml* - A **240 mL bag** is **too small** to function effectively as a self-inflating bag for neonatal resuscitation. - This volume is insufficient to maintain an adequate **oxygen reservoir** and would compromise the ability to deliver consistent positive pressure ventilation.

Q: Bohn's nodules are

Cystic swellings in neonates. ***Cystic swellings in neonates*** - **Bohn's nodules** are benign, small, white-to-yellow epithelial cysts found on the **buccal and lingual aspects of the alveolar ridges** of newborns. - They are remnants of the dental lamina and typically **resolve spontaneously** within a few weeks or months after birth. *Cysts of gingiva in growing children* - While similar in appearance, **gingival cysts of the newborn** are specifically found on the gingiva, whereas Bohn's nodules often appear on the alveolar ridge, distant from the gingival margin itself. - The term "growing children" is too broad, as Bohn's nodules are exclusively a **neonatal finding**. *Warts on the tongue* - **Warts on the tongue** are typically caused by viral infections (e.g., HPV) and present as papillomatous or verrucous lesions, which are distinct from the smooth, cystic appearance of Bohn's nodules. - Bohn's nodules are found on the alveolar ridges, not directly on the tongue surface. *Cysts associated with soft palate* - Cysts associated with the soft palate would generally include conditions like **palatal cysts of the newborn** (Epstein pearls), which are located on the median palatal raphe. - Bohn's nodules are specifically found on the **alveolar ridges**, not the soft palate.

Question 1

Earliest tumour to appear after birth is?

Accepted Answer

Cystic hygroma

Answer

Sternomastoid tumour

Answer

Branchial cyst

Answer

Lymphoma

Question 2

A new born boy is having lumbosacral meningomyelocele and awaiting the surgical repair. The sac is best protected with sterile gauze piece soaked with

Accepted Answer

Normal saline

Answer

Mercurochrome

Answer

Methylene blue

Answer

Tincture benzoin

Question 3

Which of the following is NOT a method by which incubator heat is delivered?

Accepted Answer

Sublimation

Answer

Conduction

Answer

Radiation

Answer

Convection

Question 4

In infants of diabetic mothers (IDM), when is ophthalmologic evaluation indicated?

Accepted Answer

Only if visual symptoms develop

Answer

At the time of diagnosis

Answer

After 5 years routinely

Answer

After developing diabetes

Question 5

A term infant is born to a known HIV-positive mother. She has been taking antiretroviral medications for the weeks prior to the delivery of her infant. Routine management of the healthy infant should include which of the following?

Accepted Answer

A course of zidovudine for the infant

Answer

HIV ELISA on the infant to determine if congenital infection has occurred

Answer

Admission to the neonatal intensive care unit for close cardiovascular monitoring

Answer

Chest radiographs to evaluate for congenital Pneumocystis carinii

Question 6

Estimation of the blood sugar is relevant in all except –

Accepted Answer

Baby of hypothyroid mother

Answer

Large for date baby

Answer

Birth asphyxia

Answer

Rh Incompatibility

Question 7

Which of the following is true regarding osteomyelitis in newborns?

Accepted Answer

Most common in diaphysis

Answer

Most common organism is E.coli

Answer

The infection is unifocal

Answer

Organisms are derived from maternal genital tract

Question 8

Most common cause of neonatal diarrhea worldwide is:

Accepted Answer

Rotavirus

Answer

E. coli

Answer

Salmonella

Answer

Shigella

Question 9

What is the volume of reservoir bag used in neonatal resuscitation?

Accepted Answer

500 ml

Answer

1000 ml

Answer

750 ml

Answer

240 ml

Question 10

Bohn's nodules are

Accepted Answer

Cystic swellings in neonates

Answer

Cysts of gingiva in growing children

Answer

Warts on the tongue

Answer

Cysts associated with soft palate

Neonatology — MCQs

Neonatology — MCQs

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