Otolaryngology Basics Practice Questions

Q: Type 1 thyroplasty is indicated for which of the following conditions?

Vocal cord medialization. **Explanation:** Thyroplasty, also known as **Isshiki Phonosurgery**, involves modifying the thyroid cartilage to alter the position or tension of the vocal cords without entering the airway. **1. Why Option C is Correct:** **Type 1 Thyroplasty (Medialization)** is the most common type. It is indicated for **unilateral vocal cord paralysis** (where the cord is fixed in an abducted/lateral position) or vocal cord atrophy. By placing a silastic or Gore-Tex wedge lateral to the vocal cord, the paralyzed cord is pushed toward the midline. This allows the healthy cord to make contact during phonation, improving voice quality and preventing aspiration. **2. Why Other Options are Incorrect:** * **Option A (Shortening):** This is **Type 3 Thyroplasty**. It involves removing a vertical strip of cartilage to relax the vocal cords, thereby **lowering the pitch** of the voice (used in Mutational Falsetto/Puberphonia). * **Option B (Lengthening):** This is **Type 4 Thyroplasty**. It involves cricothyroid approximation to increase the tension of the vocal cords, thereby **raising the pitch** of the voice (used in Androphonia or gender-affirming surgery). * **Option D (Lateralization):** This is **Type 2 Thyroplasty**. It is indicated for **Adductor Spasmodic Dysphonia**, where the cords close too tightly. The thyroid cartilage is incised vertically and widened to move the cords apart. **High-Yield Clinical Pearls for NEET-PG:** * **Type 1:** Medialization (for Paralysis) – *Most common.* * **Type 2:** Lateralization (for Spasmodic Dysphonia). * **Type 3:** Relaxation/Shortening (to Lower Pitch). * **Type 4:** Stretching/Tension (to Raise Pitch). * **Key Landmark:** These procedures are performed on the **Thyroid Cartilage**. * **Anesthesia:** Usually performed under **local anesthesia** so the surgeon can monitor the patient's voice quality in real-time to ensure optimal wedge placement.

Q: What is the most common cause of stridor in children?

Laryngomalacia. **Explanation:** **Laryngomalacia** is the most common cause of congenital stridor in infants and the most common congenital anomaly of the larynx. It is characterized by an inward collapse of the supraglottic structures (epiglottis, aryepiglottic folds) during inspiration, leading to a characteristic high-pitched **inspiratory stridor**. The symptoms typically appear within the first two weeks of life, worsen with crying or feeding, and usually resolve spontaneously by 18–24 months as the laryngeal cartilage matures. **Analysis of Incorrect Options:** * **B. Congenital laryngeal paralysis:** This is the second most common cause of congenital stridor. It can be unilateral (often associated with birth trauma or cardiac anomalies) or bilateral (often associated with CNS issues like Arnold-Chiari malformation). * **C. Foreign body in larynx:** While a common cause of *acute* respiratory distress in toddlers, it is not the most common cause overall and typically presents with a sudden onset of choking and cough. * **D. Congenital laryngeal tumors:** These (such as subglottic hemangiomas) are rare. They typically present with progressive stridor and are not as prevalent as laryngomalacia. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Flexible fiberoptic laryngoscopy is the gold standard (shows "Omega-shaped" epiglottis). * **Positioning:** Stridor in laryngomalacia typically **improves in the prone position** and worsens in the supine position. * **Management:** Most cases are managed conservatively. Surgical intervention (**Supraglottoplasty**) is reserved for severe cases with failure to thrive or cor pulmonale.

Q: The best way to diagnose laryngomalacia is:

Flexible fibreoptic laryngoscopy. ### Explanation **Laryngomalacia** is the most common congenital anomaly of the larynx and the leading cause of congenital stridor. It is characterized by "floppy" supraglottic structures that collapse inward during inspiration. **Why Option D is Correct:** The gold standard for diagnosis is **Flexible Fibreoptic Laryngoscopy (FFL)** performed while the patient is **awake and breathing spontaneously**. This allows the clinician to observe the dynamic collapse of the supraglottic tissues (such as omega-shaped epiglottis or shortened aryepiglottic folds) in real-time during the respiratory cycle. **Why Other Options are Incorrect:** * **Option A:** While symptoms (inspiratory stridor worsening when supine or crying) are suggestive, they cannot definitively differentiate laryngomalacia from other causes of stridor like vocal cord palsy or subglottic stenosis. * **Option B:** Soft tissue X-rays are useful for detecting radio-opaque foreign bodies or "steeple signs" in croup, but they cannot capture the dynamic soft tissue collapse characteristic of laryngomalacia. * **Option C:** Direct laryngoscopy under General Anaesthesia (GA) often utilizes muscle relaxants or positive pressure ventilation, which can mask the natural dynamic collapse of the airway, leading to a false-negative result. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Presentation:** High-pitched inspiratory stridor that appears at 2–4 weeks of age, worsens in the supine position, and improves when prone. * **Key Findings on FFL:** 1. **Omega-shaped (Ω) epiglottis** (most common). 2. Shortened aryepiglottic folds. 3. Redundant/bulky arytenoid mucosa. * **Management:** Most cases (90%) are self-limiting and resolve by 18–24 months. **Supraglottoplasty** is the surgical treatment of choice for severe cases (e.g., failure to thrive, cor pulmonale, or severe apnea).

Q: A cricoid hook is particularly used for which surgical procedure?

Tracheostomy. **Explanation:** The **cricoid hook** is a specialized surgical instrument used primarily during **tracheostomy**. Its primary function is to stabilize the larynx and pull the cricoid cartilage superiorly and anteriorly. This maneuver serves two critical purposes: it brings the trachea closer to the skin surface and stabilizes the mobile airway, allowing the surgeon to make a precise incision into the tracheal rings (usually between the 2nd and 3rd or 3rd and 4th rings) without the risk of the trachea shifting. **Analysis of Options:** * **Tracheostomy (Correct):** As described, the hook provides traction and stabilization of the trachea, which is essential for a safe and controlled entry into the airway. * **Thyroidectomy:** While retractors (like Langenbeck or Joll’s) are used, a cricoid hook is not standard as the focus is on lateral retraction of muscles and mobilization of the thyroid gland, not superior traction of the larynx. * **Block dissection of the neck:** This procedure involves the removal of lymph nodes and fibrofatty tissue. It requires wide-field retractors (like Morris or Deaver) rather than a small, sharp hook designed for cartilaginous stabilization. * **Retracting the superior laryngeal nerve:** This is a delicate neural structure. Using a sharp cricoid hook would cause permanent nerve damage. Nerve protectors or fine blunt dissectors are used instead. **Clinical Pearls for NEET-PG:** * **The "Safety" Rule:** During tracheostomy, the cricoid hook should be held by the assistant to maintain the midline position. * **High-Yield Landmark:** The cricoid cartilage is the only complete cartilaginous ring in the airway and serves as the landmark for the 1st tracheal ring immediately below it. * **Complication:** Improper use of the hook can lead to accidental puncture of the subglottic space or trauma to the cricoid itself, potentially leading to subglottic stenosis.

Q: What is the most common cause of lower motor neuron facial palsy?

Bell's palsy. **Explanation:** **1. Why Bell’s Palsy is Correct:** Bell’s palsy is an idiopathic, acute-onset lower motor neuron (LMN) facial nerve paralysis. It is the **most common cause** of isolated facial palsy worldwide, accounting for approximately 60–75% of all cases. Pathophysiologically, it is believed to be caused by viral-induced (often HSV-1) inflammation and edema of the facial nerve within the narrow fallopian canal, leading to nerve compression and ischemia. **2. Analysis of Incorrect Options:** * **A. Cholesteatoma:** While a common cause of facial nerve palsy in patients with Chronic Suppurative Otitis Media (CSOM), it is far less frequent than Bell's palsy. It causes palsy via direct pressure or inflammatory erosion of the bony canal. * **B. Cerebello-pontine (CP) angle tumors:** Tumors like Acoustic Neuroma (Vestibular Schwannoma) can cause LMN facial palsy, but they typically present with associated symptoms like sensorineural hearing loss and tinnitus. They are a much rarer cause than idiopathic palsy. * **C. Postoperative (ear surgery):** Iatrogenic injury is a significant concern during mastoidectomy or stapedectomy, but with modern surgical techniques and monitoring, it remains a complication rather than the leading cause in the general population. **3. Clinical Pearls for NEET-PG:** * **Diagnosis of Exclusion:** Bell’s palsy is diagnosed only after excluding middle ear pathology, trauma, and tumors. * **House-Brackmann Scale:** Used to grade the severity of facial nerve palsy (Grade I is normal; Grade VI is total paralysis). * **Management:** The mainstay of treatment is **Oral Corticosteroids** (e.g., Prednisolone), which should ideally be started within 72 hours of onset. Antivirals (Acyclovir) may be added in severe cases. * **Topognostic Tests:** Schirmer’s test, Stapedial reflex, and Taste sensation help localize the site of the lesion along the nerve's course.

Q: A patient presents with carcinoma of the larynx. Which of the following sites is most likely to harbor a synchronous second primary malignancy?

Carcinoma of the bronchus. **Explanation:** The occurrence of synchronous or metachronous tumors in the upper aerodigestive tract is explained by the concept of **"Field Cancerization."** This theory suggests that large areas of mucous membranes are pre-conditioned by prolonged exposure to common carcinogens (primarily tobacco and alcohol), making the entire tract susceptible to multiple independent primary malignancies. **Why Carcinoma of the Bronchus is Correct:** In patients with laryngeal carcinoma, the most common site for a synchronous second primary malignancy is the **bronchus (lung)**. Both the larynx and the lungs share the same respiratory epithelium and are exposed to the same inhaled carcinogens (tobacco smoke). Statistically, the lung is the most frequent site for second primaries in head and neck cancer patients, followed by the esophagus. **Analysis of Incorrect Options:** * **A. Base of Tongue:** While part of the "field," it is less frequently involved as a synchronous site compared to the lower respiratory tract. * **B. Esophagus:** This is the second most common site for synchronous tumors in laryngeal cancer patients (due to the "swallowed" carcinogens), but it ranks lower than the bronchus. * **D. Nasopharynx:** Nasopharyngeal carcinoma is more strongly associated with EBV infection and genetic factors rather than the field cancerization effect seen with tobacco-related laryngeal cancers. **High-Yield Clinical Pearls for NEET-PG:** * **Definition:** *Synchronous* tumors are diagnosed at the same time or within 6 months of the index tumor. *Metachronous* tumors are diagnosed more than 6 months later. * **Slaughter’s Hypothesis:** The formal name for the "Field Cancerization" theory (1953). * **Screening:** Because of this high risk, a "triple endoscopy" (panendoscopy)—consisting of laryngoscopy, esophagoscopy, and bronchoscopy—was traditionally recommended for the workup of head and neck cancers.

Q: Facial nerve involvement in herpes zoster is known as?

Ramsay Hunt syndrome. **Explanation:** **Ramsay Hunt Syndrome (Herpes Zoster Oticus)** is caused by the reactivation of the **Varicella Zoster Virus (VZV)** in the **geniculate ganglion** of the facial nerve. It is characterized by a clinical triad: 1. **Ipsilateral facial nerve palsy** (Lower Motor Neuron type). 2. **Otalgia** (severe ear pain). 3. **Vesicular eruptions** on the auricle, external auditory canal, or oropharynx. Because the facial nerve is closely associated with the vestibulocochlear nerve, patients may also experience tinnitus, hearing loss, or vertigo. **Analysis of Incorrect Options:** * **Melkersson-Rosenthal Syndrome:** A rare neurological disorder characterized by a triad of recurrent facial paralysis, orofacial edema (usually the lips), and a fissured tongue (**lingua plicata**). * **Jaw Wrinkling Syndrome:** A phenomenon of synkinesis where the skin of the jaw wrinkles during certain facial movements, often seen after recovery from facial nerve injury. * **Frey’s Syndrome (Auriculotemporal Syndrome):** Characterized by gustatory sweating and flushing over the parotid region during eating. It occurs due to aberrant reinnervation of sweat glands by parasympathetic fibers of the auriculotemporal nerve following parotid surgery. **High-Yield Clinical Pearls for NEET-PG:** * **Prognosis:** Ramsay Hunt syndrome has a poorer prognosis for facial nerve recovery compared to Bell’s Palsy. * **Treatment:** Combination of oral **Acyclovir** (or Valacyclovir) and **Corticosteroids** is the gold standard. * **Nerve Involved:** CN VII is primarily affected, but CN VIII, IX, and X can also be involved (polyneuritis).

Question 1

Type 1 thyroplasty is indicated for which of the following conditions?

Accepted Answer

Vocal cord medialization

Answer

Vocal cord shortening

Answer

Vocal cord lengthening

Answer

Vocal cord lateralization

Question 2

What is the most common cause of stridor in children?

Accepted Answer

Laryngomalacia

Answer

Congenital laryngeal paralysis

Answer

Foreign body in larynx

Answer

Congenital laryngeal tumors

Question 3

Trismus following a lower molar extraction, presenting after 4 weeks, may be due to which of the following complications?

Accepted Answer

Breakage of needle in the pterygomandibular space

Answer

Hematoma of the temporomandibular joint (TMJ)

Answer

Abscess in the submasseteric space

Answer

Retained root stump in the extraction socket

Question 4

The best way to diagnose laryngomalacia is:

Accepted Answer

Flexible fibreoptic laryngoscopy

Answer

Symptoms and signs of disease only

Answer

Soft tissue lateral view neck

Answer

Direct laryngoscopy under general anaesthesia

Question 5

A cricoid hook is particularly used for which surgical procedure?

Accepted Answer

Tracheostomy

Answer

Thyroidectomy

Answer

Block dissection of the neck

Answer

Retracting the superior laryngeal nerve

Question 6

Which of the following statements is NOT true regarding the development and reconstruction of the pinna?

Accepted Answer

Reconstruction of the pinna in anotia is optimally performed within 1 year of age.

Answer

The pinna develops from the first pharyngeal arch hillocks of His.

Answer

The tragus is formed from the first pharyngeal arch hillock.

Answer

Costal cartilage is used as a graft in the surgical treatment of anotia.

Question 7

What is the most common cause of lower motor neuron facial palsy?

Accepted Answer

Bell's palsy

Answer

Cholesteatoma

Answer

Cerebello-pontine angle tumors

Answer

Postoperative (ear surgery)

Question 8

A patient presents with carcinoma of the larynx. Which of the following sites is most likely to harbor a synchronous second primary malignancy?

Accepted Answer

Carcinoma of the bronchus

Answer

Cancer of the base of the tongue

Answer

Cancer of the esophagus

Answer

Carcinoma of the nasopharynx

Question 9

What is not characteristic of Eagle's syndrome?

Accepted Answer

Excessive lacrimation

Answer

Pain during mandibular movement

Answer

Stabbing type pain originating in the tonsillar regions

Answer

Pain subsides when the jaws are closed

Question 10

Facial nerve involvement in herpes zoster is known as?

Accepted Answer

Ramsay Hunt syndrome

Answer

Melkersson Rosenthal syndrome

Answer

Jaw wrinkling syndrome

Answer

Frey's syndrome

Otolaryngology Basics — MCQs

Otolaryngology Basics — MCQs

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