Pediatric Otolaryngology — MCQs

Pediatric Otolaryngology Indian Medical PG Practice Questions and MCQs

Question 21: A child has a retained disc battery in the nose. What is the most important consideration in the management?

A. The battery substance can leak and cause tissue damage. (Correct Answer)
B. It can lead to tetanus.
C. Refer the child to a specialist for removal of the battery.
D. Instill nasal drops.

Explanation: **Explanation:** A retained disc battery (button battery) in the nasal cavity is a **surgical emergency**. Unlike inert foreign bodies, disc batteries cause rapid and severe tissue destruction through three primary mechanisms: 1. **Leakage of alkaline contents:** The corrosive substance (usually potassium or sodium hydroxide) causes liquefactive necrosis. 2. **Electrical current:** The moist mucosa completes an electrical circuit, leading to electrolysis and the generation of hydroxide ions at the negative pole. 3. **Pressure necrosis:** Direct physical pressure on the septum. **Analysis of Options:** * **Option A (Correct):** The leakage of caustic alkaline substances leads to rapid **liquefactive necrosis**, which can cause septal perforation within hours. This is the most critical pathological consideration. * **Option B:** While any foreign body carries a theoretical risk, tetanus is not the primary or immediate concern in nasal battery impaction. * **Option C:** While a specialist (ENT surgeon) should ideally remove it, the "most important consideration" in the management logic is understanding the **pathophysiology (tissue damage)** that necessitates urgent intervention. * **Option D:** **Contraindicated.** Instilling nasal drops or irrigation creates a moist environment that enhances the electrical circuit and accelerates the leakage of corrosive chemicals, worsening the injury. **NEET-PG High-Yield Pearls:** * **Emergency Status:** Nasal disc batteries must be removed immediately (within 2–4 hours) to prevent permanent septal perforation and saddle nose deformity. * **Radiology:** On X-ray, look for the **"Double-Contour" or "Step-off" sign** (lateral view) and the **"Halo sign"** (AP view) to differentiate a battery from a coin. * **Management Tip:** Never use oil or saline drops; keep the area dry until the battery is extracted.

Question 22: What is the subglottic diameter less than which is considered subglottic stenosis in term infants?

A. 2 mm
B. 3 mm
C. 4 mm (Correct Answer)
D. 5 mm

Explanation: ### Explanation **Subglottic stenosis (SGS)** is defined as a narrowing of the subglottic airway, which is the narrowest part of the pediatric airway (at the level of the cricoid cartilage). **1. Why 4 mm is the Correct Answer:** In a healthy, full-term neonate, the normal subglottic diameter is approximately **4.5 to 5 mm**. According to the standard clinical definition, subglottic stenosis is diagnosed when the diameter of the subglottis is **less than 4 mm** in a full-term infant. In premature infants, the threshold is lower, typically considered less than **3 mm**. **2. Analysis of Incorrect Options:** * **Option A (2 mm):** This represents a critical, life-threatening narrowing. While it is technically stenosis, it is far below the diagnostic threshold. * **Option B (3 mm):** This is the diagnostic cutoff for **premature infants**, but not for term infants. * **Option D (5 mm):** This is considered the lower limit of the **normal range** for a term infant. **3. Clinical Pearls for NEET-PG:** * **Most Common Cause:** Congenital SGS is the third most common congenital anomaly of the larynx (after laryngomalacia and vocal cord paralysis). However, **acquired SGS** (due to prolonged endotracheal intubation) is more common overall. * **Grading System:** The **Cotton-Myer Classification** is used to grade the severity based on the percentage of lumen reduction: * Grade I: <50% obstruction * Grade II: 51–70% * Grade III: 71–99% * Grade IV: No detectable lumen (complete atresia) * **Clinical Presentation:** The hallmark sign is **biphasic stridor**. * **Management:** Mild cases (Grade I/II) may be managed conservatively; severe cases (Grade III/IV) often require surgical intervention like **Laryngotracheal Reconstruction (LTR)** or **Cricotracheal Resection (CTR)**.

Question 23: What is the most common manifestation of HPV infection in children?

A. Single papilloma
B. Multiple papillomatosis (Correct Answer)
C. Osteoma
D. Sarcoma

Explanation: **Explanation:** The correct answer is **Multiple papillomatosis**, specifically referring to **Recurrent Respiratory Papillomatosis (RRP)**. **1. Why it is correct:** In children, HPV infection (primarily types **6 and 11**) typically manifests as Juvenile-Onset Recurrent Respiratory Papillomatosis (JORRP). Unlike the adult form, the pediatric version is characterized by **multiple, aggressive, and recurring** squamous papillomas throughout the upper aerodigestive tract, most commonly on the true vocal cords. It is usually acquired during childbirth via vertical transmission from a mother with genital warts. **2. Why other options are incorrect:** * **A. Single papilloma:** This is the characteristic presentation of **Adult-Onset RRP**. In adults, the disease is usually more indolent and often presents as a solitary lesion with a lower recurrence rate compared to the pediatric form. * **C. Osteoma:** This is a benign bone tumor (most common in the frontal sinus) and has no etiopathogenic link to the Human Papillomavirus. * **D. Sarcoma:** While high-risk HPV types (16, 18) are strongly associated with squamous cell carcinoma (especially oropharyngeal), they do not cause sarcomas, which are tumors of mesenchymal origin. **3. Clinical Pearls for NEET-PG:** * **Triad of RRP:** Hoarseness of voice, chronic cough, and progressive stridor. * **Gold Standard Treatment:** Surgical excision using **CO2 laser** or **Microdebrider**. The goal is airway patency and voice preservation, not necessarily total cure, as recurrence is common. * **Adjuvant Therapy:** Indicated if surgery is required >4 times/year. **Cidofovir** (intralesional) is the most commonly used agent. * **Prevention:** The quadrivalent/nanovalent HPV vaccine is highly effective in reducing the incidence of RRP.

Question 24: What is the narrowest part of the infantile larynx?

A. Supraglottic
B. Subglottic (Correct Answer)
C. Glottic
D. None of the above

Explanation: **Explanation:** The infantile larynx is not merely a smaller version of the adult larynx; it possesses distinct anatomical differences. In infants and children under the age of 8–10 years, the **Subglottis** (at the level of the **cricoid cartilage**) is the narrowest part of the airway. **1. Why Subglottic is Correct:** The cricoid cartilage is the only complete cartilaginous ring in the respiratory tract. In infants, this ring is funnel-shaped and non-expandable. While the glottis (vocal cords) can abduct to increase the airway diameter, the subglottic region is fixed by the rigid cricoid ring. Anatomically, the diameter here is approximately 4–5 mm in a term neonate. **2. Why other options are incorrect:** * **Glottic:** In **adults**, the glottis (specifically the rima glottidis) is the narrowest part. In children, however, the subglottic diameter is smaller than the inter-membranous space of the cords. * **Supraglottic:** This area is wider and composed of flexible structures like the epiglottis and aryepiglottic folds. While prone to collapse (as in laryngomalacia), it is not the narrowest point anatomically. **3. Clinical Pearls for NEET-PG:** * **Poiseuille’s Law:** Because the subglottis is the narrowest point, even 1 mm of inflammatory edema (as seen in Croup/Laryngotracheobronchitis) reduces the cross-sectional area by 75% and increases airway resistance 16-fold. * **Shape Difference:** The pediatric larynx is **funnel-shaped**, whereas the adult larynx is **cylindrical**. * **Position:** The infantile larynx is higher in the neck (at the level of C3–C4) compared to the adult larynx (C3–C6). * **Endotracheal Intubation:** Due to the narrow subglottis, **uncuffed tubes** were traditionally preferred in pediatrics to prevent pressure necrosis and subsequent subglottic stenosis (though modern practice uses specialized cuffed tubes).

Question 25: A 7-year-old boy presents with high fever and ear pain. Physical examination reveals a red and inflamed throat, confirming pharyngitis. Which structure provides a pathway for infection to spread from the pharynx to the tympanic cavity?

A. Choanae
B. Internal acoustic meatus
C. External acoustic meatus
D. Pharyngotympanic tube (Correct Answer)

Explanation: **Explanation:** The correct answer is the **Pharyngotympanic tube** (also known as the Eustachian tube or Auditory tube). **1. Why it is correct:** The pharyngotympanic tube is a cartilaginous and bony channel that anatomically connects the **nasopharynx** to the **tympanic cavity** (middle ear). Its primary functions are to equalize pressure across the tympanic membrane and drain secretions. In the context of pharyngitis or upper respiratory tract infections (URTI), microorganisms can migrate from the throat up through this tube to the middle ear, leading to **Acute Otitis Media (AOM)**. This is especially common in children because their tubes are shorter, wider, and more horizontal than in adults. **2. Why the other options are incorrect:** * **Choanae:** These are the posterior nasal apertures that connect the nasal cavity to the nasopharynx. While involved in breathing, they do not lead to the middle ear. * **Internal acoustic meatus:** This is a canal in the petrous part of the temporal bone that transmits the facial (VII) and vestibulocochlear (VIII) nerves from the inner ear to the cranial fossa. It does not communicate with the pharynx. * **External acoustic meatus:** This is the outer ear canal leading from the auricle to the tympanic membrane. It is separated from the middle ear by the eardrum and has no connection to the throat. **3. NEET-PG High-Yield Pearls:** * **Anatomy:** The lateral 1/3 of the tube is bony, while the medial 2/3 is fibrocartilaginous. * **Muscles:** The **Tensor veli palatini** is the main muscle responsible for opening the tube (often called the "dilator tubae"). * **Pediatric Factor:** The angle of the Eustachian tube in infants is approximately **10°**, whereas in adults, it is **45°**, explaining the higher incidence of AOM in children. * **Adenoids:** Hypertrophy of the adenoids can block the pharyngeal opening of the tube, leading to Otitis Media with Effusion (Glue Ear).

Question 26: What percentage of newborns present with a deviation of the nasal septum?

A. 2%
B. 10%
C. 20%
D. 60% (Correct Answer)

Explanation: **Explanation:** The correct answer is **60% (Option D)**. While the neonatal nose is primarily composed of flexible cartilage, nasal septal deviation (NSD) is surprisingly common at birth. Studies utilizing anterior rhinoscopy and clinical examination have shown that approximately **20% to 60%** of newborns exhibit some degree of septal deformity. **Why 60% is correct:** The primary etiology is **intrauterine molding** and **birth trauma**. During the second stage of labor, the fetal nose is subjected to significant compressive forces against the maternal pelvis (symphysis pubis or sacral promontory). This "press-fit" mechanism often causes the septum to buckle or dislocate from the vomerine groove. While many of these deviations are minor and asymptomatic, the statistical prevalence in clinical studies reaches up to 60%. **Analysis of Incorrect Options:** * **A (2%) & B (10%):** These figures are far too low. They may represent the incidence of severe, obstructive deviations requiring immediate intervention (like the Jeppesen and Windfeld criteria), but they do not reflect the total prevalence of anatomical deviation. * **C (20%):** This represents the lower end of the reported range. In the context of NEET-PG, where a single value is required, the higher end of the spectrum (60%) is the classically cited "textbook" figure for overall incidence. **High-Yield Clinical Pearls for NEET-PG:** * **Metzenbaum Sign:** A clinical test used to diagnose neonatal NSD; if the tip of the nose is pushed toward the midline and the deviation persists, it confirms a fixed deformity. * **Treatment:** Most neonatal deviations are managed conservatively. However, if there is respiratory distress (newborns are obligatory nasal breathers), immediate closed reduction using a **Walsham’s forceps** or a blunt elevator is indicated. * **Cottle’s Test:** Used in adults to evaluate the internal nasal valve; it is generally not applicable/reliable in neonates.

Question 27: In mumps, what is the most common eye lesion?

A. Dacryoadenitis (Correct Answer)
B. Uveitis
C. Membranous conjunctivitis
D. Chorioretinitis

Explanation: **Explanation:** **Mumps** is a viral infection caused by the **Paramyxovirus**, primarily known for causing painful swelling of the parotid glands. However, it is a systemic disease that can affect various glandular tissues and the ocular system. **1. Why Dacryoadenitis is the correct answer:** **Dacryoadenitis** (inflammation of the lacrimal gland) is the **most common** ocular complication of mumps. This occurs because the Paramyxovirus has a high affinity for glandular epithelium. Since the lacrimal gland is structurally and functionally similar to the salivary glands, it is frequently involved. It typically presents as sudden onset of pain, swelling, and redness in the temporal aspect of the upper eyelid, often occurring bilaterally. **2. Analysis of Incorrect Options:** * **B. Uveitis:** While mumps can cause a transient, non-granulomatous anterior uveitis (usually during the recovery phase), it is significantly less common than dacryoadenitis. * **C. Membranous conjunctivitis:** Mumps usually causes a mild follicular conjunctivitis. Membranous conjunctivitis is more classically associated with *Corynebacterium diphtheriae* or Adenovirus (EKC). * **D. Chorioretinitis:** This is a rare posterior segment complication of mumps. It is much more frequently associated with infections like Toxoplasmosis, CMV, or Syphilis. **3. NEET-PG High-Yield Pearls:** * **Most common systemic complication in children:** Aseptic meningitis. * **Most common systemic complication in post-pubertal males:** Orchitis (usually unilateral; rarely leads to sterility). * **Most common cause of sudden onset sensorineural hearing loss (SNHL) in children:** Mumps (typically unilateral and permanent). * **Ocular triad:** Though rare, mumps can present with the triad of dacryoadenitis, keratitis, and optic neuritis.

Question 28: Which of the following syndromes is most commonly associated with clefts of the lip and palate?

A. Apert syndrome
B. Crouzon syndrome
C. Pierre-Robin syndrome (Correct Answer)
D. Down syndrome

Explanation: **Explanation:** **Pierre-Robin Sequence (PRS)** is the correct answer because it is classically defined by a clinical triad: **Micrognathia** (small mandible), **Glossoptosis** (posterior displacement of the tongue), and a **U-shaped Cleft Palate**. The underlying mechanism is a developmental "domino effect": the hypoplastic mandible prevents the tongue from descending, which in turn prevents the palatal shelves from fusing in the midline, resulting in a wide cleft. **Analysis of Incorrect Options:** * **Apert Syndrome:** Characterized by craniosynostosis, midface hypoplasia, and **syndactyly** (mitten-like hands). While a high-arched palate is common, overt clefting is less frequent than in PRS. * **Crouzon Syndrome:** Another craniosynostosis syndrome featuring proptosis and midface hypoplasia. It is rarely associated with cleft lip/palate. * **Down Syndrome (Trisomy 21):** Associated with a large protruding tongue (macroglossia) and a high-arched palate, but not typically with cleft lip or palate. **High-Yield Clinical Pearls for NEET-PG:** * **Sequence vs. Syndrome:** PRS is technically a "sequence" because one primary defect (micrognathia) leads to the subsequent defects. * **Airway Management:** The primary concern in PRS is upper airway obstruction due to glossoptosis. Management ranges from **prone positioning** (first-line) to surgical interventions like **Mandibular Distraction Osteogenesis** or tracheostomy. * **Stickler Syndrome:** This is the most common *syndrome* associated with Pierre-Robin Sequence; always check for ocular abnormalities (high myopia/retinal detachment).

Question 29: What are the clinical features of submucous cleft deformity?

A. Bifid uvula
B. Notching of the posterior edge of the hard palate
C. Midline translucency of the soft palate
D. All of the above (Correct Answer)

Explanation: ### Explanation A **Submucous Cleft Palate (SMCP)** is a congenital deformity where the palatal mucosa is intact, but the underlying levator veli palatini muscles fail to fuse in the midline. This condition is classically defined by **Calnan’s Triad**, which encompasses all the features mentioned in the options. **Breakdown of Clinical Features:** 1. **Bifid Uvula (Option A):** This is the most common and visible sign. It occurs due to the failure of the uvular musculature to unite during embryonic development. 2. **Notching of the Hard Palate (Option B):** On palpation, a V-shaped notch can be felt at the posterior edge of the hard palate (posterior nasal spine) because the bony shelf has not fused completely. 3. **Midline Translucency/Zona Pellucida (Option C):** The soft palate appears thin and bluish in the midline because there is a lack of muscle tissue between the oral and nasal mucosa. **Why "All of the Above" is Correct:** Since all three features constitute the diagnostic triad of SMCP, they are all correct clinical findings. **High-Yield Clinical Pearls for NEET-PG:** * **Velopharyngeal Insufficiency (VPI):** Patients often present with hypernasal speech (rhinolalia aperta) and nasal regurgitation of fluids. * **Eustachian Tube Dysfunction:** Due to the abnormal insertion of the tensor veli palatini muscle, these children are highly prone to **Otitis Media with Effusion (OME)**. * **Management:** Surgery (Palatoplasty) is only indicated if the patient has speech defects or significant VPI; an asymptomatic bifid uvula alone does not require surgery. * **Association:** Often associated with **Loeys-Dietz syndrome** or **22q11.2 deletion syndrome**.

Question 30: In a 5-year-old child, what is the most common cause of unilateral epistaxis?

A. Foreign body (Correct Answer)
B. Polyp
C. Atrophic rhinitis
D. Maggots

Explanation: **Explanation:** In the pediatric population, the presentation of **unilateral** nasal symptoms—specifically epistaxis, foul-smelling discharge, or nasal obstruction—should be considered a **Foreign Body (FB)** until proven otherwise. Children frequently insert small objects (beads, seeds, button batteries) into the nasal cavity. These objects cause local mucosal irritation, pressure necrosis, and secondary infection, leading to localized bleeding. While the most common cause of *bilateral* epistaxis in children is digital trauma (nose picking) at Little’s area, a persistent unilateral bloody discharge is the classic hallmark of a nasal foreign body. **Analysis of Incorrect Options:** * **B. Polyp:** Nasal polyps are uncommon in young children. If present, they are usually bilateral (associated with Cystic Fibrosis) or a unilateral Antrochoanal polyp. While they cause obstruction, they rarely present primarily as epistaxis. * **C. Atrophic Rhinitis:** This is a chronic condition characterized by mucosal atrophy and crusting. It is typically seen in young adults (more common in females) and is usually bilateral. * **D. Maggots (Nasal Myiasis):** This occurs due to fly larvae infestation, usually in patients with poor hygiene or atrophic rhinitis. While it causes bleeding and discharge, it is significantly less common than foreign bodies in the general pediatric population. **Clinical Pearls for NEET-PG:** * **Button Batteries:** These are surgical emergencies. They cause liquefactive necrosis and septal perforation within hours due to electrical current and chemical leakage. **Do not** use saline drops if a battery is suspected. * **Management:** Most foreign bodies are located on the floor of the nose, anterior to the inferior turbinate. Removal is often attempted using a Hook or a Jobson Horne probe; avoid using forceps for smooth, round objects as they may push the FB into the nasopharynx, risking aspiration.

Practice by Chapter

Congenital Anomalies of the Ear

Practice Questions

Pediatric Hearing Loss

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Otitis Media in Children

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Pediatric Sinusitis

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Pediatric Sleep Apnea

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Stridor in Children

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Congenital Airway Anomalies

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Foreign Body Management

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Pediatric Head and Neck Masses

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Pediatric Tracheostomy

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Pediatric Voice Disorders

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Pierre Robin Sequence and Airway Management

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