Otolaryngology Basics Practice Questions

Q: Hypothyroidism can cause all of the following symptoms except:

Dryness of mouth. **Explanation:** Hypothyroidism is a systemic metabolic disorder characterized by the accumulation of **glycosaminoglycans (GAGs)**, such as hyaluronic acid, in various tissues. This leads to the classic "myxedematous" changes. **Why "Dryness of Mouth" is the correct answer:** Dryness of mouth (Xerostomia) is typically associated with conditions like Sjögren's syndrome, radiotherapy, or anticholinergic drugs. In hypothyroidism, the opposite often occurs; the tongue becomes enlarged (**macroglossia**) due to GAG deposition, but salivary flow is generally not decreased. **Analysis of Incorrect Options:** * **Hoarseness:** This is a very common ENT manifestation of hypothyroidism. It occurs due to the deposition of GAGs in the **Reinke’s space** of the vocal cords, leading to thickening and edema (myxedema of the larynx). * **Nasal Stuffiness:** The nasal mucosa undergoes vasomotor-like changes. Myxedematous infiltration of the nasal turbinates leads to swelling and increased airway resistance, causing chronic nasal congestion. * **Vertigo:** Hypothyroidism can affect the inner ear. It is associated with endolymphatic hydrops and vestibular dysfunction, leading to symptoms of vertigo, tinnitus, and sensorineural hearing loss. **High-Yield Clinical Pearls for NEET-PG:** * **Hearing Loss:** Hypothyroidism is a known cause of reversible sensorineural hearing loss (SNHL). * **Macroglossia:** It is a classic sign; always consider hypothyroidism or amyloidosis when presented with an enlarged tongue. * **Goiter:** While often associated with hyperthyroidism (Graves'), it is frequently seen in hypothyroidism (Hashimoto’s) due to elevated TSH levels stimulating thyroid tissue. * **Reinke’s Edema:** While smoking is the primary cause, hypothyroidism is an important systemic differential for diffuse vocal cord swelling.

Q: In MPDS, which muscle is most likely to exhibit tenderness?

Lateral pterygoid. **Explanation:** **Myofascial Pain Dysfunction Syndrome (MPDS)** is a psychophysiological disorder characterized by pain, muscle tenderness, and restricted jaw movement, often triggered by stress-induced bruxism or clenching. **Why Lateral Pterygoid is the Correct Answer:** The **lateral pterygoid** is the most frequently involved muscle in MPDS and is typically the first to exhibit tenderness. This is because it is the primary muscle responsible for the protrusion and lateral excursion of the mandible. In patients with MPDS, chronic overactivity and spasms of this muscle lead to pain that is often referred to the preauricular area, mimicking an earache. Clinical examination usually reveals tenderness behind the maxillary tuberosity or via intraoral palpation. **Analysis of Incorrect Options:** * **Tendon poratus:** This is not a recognized anatomical structure involved in mastication or MPDS. * **Buccinator:** While it is a muscle of the cheek, it is considered a muscle of facial expression (innervated by the facial nerve) rather than a muscle of mastication. It does not play a primary role in the pathophysiology of MPDS. * **Masseter:** The masseter is frequently involved in MPDS and is often the second most common muscle to show tenderness. However, the lateral pterygoid remains the most common and earliest site of involvement. **Clinical Pearls for NEET-PG:** * **Triad of MPDS:** Pain (preauricular), muscle tenderness, and clicking/popping sounds in the TMJ. * **Management:** Reassurance, soft diet, analgesics (NSAIDs), and muscle relaxants. Occlusal splints are used for bruxism. * **Differential Diagnosis:** Must be distinguished from Costen’s Syndrome (which specifically attributes TMJ pain to malocclusion and ear symptoms). * **Nerve Supply:** All muscles of mastication (including lateral pterygoid) are supplied by the mandibular branch of the Trigeminal nerve (V3).

Q: What is the management of stage I laryngeal carcinoma?

Radiotherapy. **Explanation:** The management of **Stage I Laryngeal Carcinoma** (T1N0M0) aims to achieve a high cure rate while preserving laryngeal function, specifically the quality of voice. **Why Radiotherapy is the Correct Answer:** For Stage I lesions, both **Radiotherapy (RT)** and **Endoscopic Laser Excision** are considered primary treatment modalities. However, in the context of standard NEET-PG patterns, Radiotherapy is often favored as the classic answer because it offers an excellent cure rate (approx. 90%) while maintaining a **superior voice quality** compared to surgical interventions. It treats the entire field without the need for structural tissue removal. **Analysis of Incorrect Options:** * **A. Partial Laryngectomy:** While oncologically sound, it is more invasive than RT or laser surgery and is typically reserved for specific T2 or early T3 lesions where endoscopic options are not feasible. * **B. Total Laryngectomy:** This is the treatment of choice for **Stage IV** (advanced) disease or cases with cartilage destruction. It is far too aggressive for Stage I, as it results in the permanent loss of the natural voice. * **C. Laser Ablation (Transoral Laser Microsurgery):** This is a valid alternative to RT for Stage I. However, if both are options, RT is traditionally highlighted for its functional outcomes in glottic cancer. If the question implies a bulky T1, RT is often preferred. **High-Yield Clinical Pearls for NEET-PG:** * **Stage I & II (Early):** Single modality treatment (RT or Surgery). * **Stage III & IV (Advanced):** Combined modality (Surgery + Post-op RT or Chemoradiotherapy). * **Most common site:** Glottis (vocal cords). Glottic cancers have the best prognosis due to early symptoms (hoarseness) and sparse lymphatic drainage. * **Drug of choice for Chemoradiation:** Cisplatin.

Q: Gutzmann's pressure test is done for which of the following conditions?

Puberphonia. **Explanation:** **Puberphonia** (Mutational Falsetto) is a functional voice disorder where a post-pubescent male continues to use a high-pitched pre-pubertal voice despite having a normal adult larynx. This occurs because the patient habitually maintains the larynx in an elevated position in the neck, keeping the vocal cords tense and thin. **Gutzmann’s Pressure Test** is the diagnostic clinical test for this condition. During the test, the clinician applies firm backward and downward pressure on the thyroid cartilage while the patient phonates. This maneuver manually lowers the larynx and relaxes the vocal cords, resulting in an immediate drop in vocal pitch to a more masculine, low-frequency tone. If the pitch drops during pressure, the test is positive, confirming the diagnosis. **Analysis of Incorrect Options:** * **Laryngomalacia:** This is a congenital condition causing inspiratory stridor due to floppy supraglottic tissues. Diagnosis is made via flexible laryngoscopy (showing omega-shaped epiglottis), not pressure tests. * **Laryngeal/Vocal Cord Polyp:** These are benign organic lesions causing hoarseness (dysphonia). Diagnosis is confirmed by visualization (indirect or direct laryngoscopy). Pressure tests do not correct the mechanical mass effect of a polyp. **High-Yield Clinical Pearls for NEET-PG:** * **Treatment of choice for Puberphonia:** Voice therapy (specifically **Type A Speech Therapy** or the "Sliding Scale" technique). * **Surgical option:** If therapy fails, **Type III Thyroplasty** (Relaxation Thyroplasty) is performed to shorten and relax the vocal cords. * **Differential:** Always rule out endocrine disorders (hypogonadism) before diagnosing functional puberphonia.

Q: What is the approximate width of the glottic chink in the cadaveric position of the vocal cords?

7 mm. ### Explanation The **glottic chink** (rima glottidis) refers to the space between the vocal cords. Its width varies significantly depending on the position of the vocal cords, which is determined by the intrinsic muscles of the larynx and their nerve supply. **Why 7 mm is correct:** The **cadaveric position** is the neutral position assumed by the vocal cords after death or complete paralysis of all laryngeal muscles (total lesion of both Recurrent Laryngeal Nerve and Superior Laryngeal Nerve). In this state, the vocal cords lie midway between the midline and the abducted position. The width of the glottic chink in this position is approximately **7 mm**. **Analysis of Incorrect Options:** * **A & B (3 mm / 3.5 mm):** These values are too narrow for the cadaveric position. A width of approximately **3.5 mm** is seen in the **paramedian position**, which occurs in isolated Recurrent Laryngeal Nerve (RLN) palsy (where the cricothyroid muscle, supplied by the Superior Laryngeal Nerve, remains intact and adducts the cord). * **D (19 mm):** This is far too wide. In **full abduction** (forced inspiration), the glottic chink reaches its maximum width, which is approximately **13–14 mm** in males. 19 mm exceeds the anatomical limits of the adult glottis. **High-Yield Clinical Pearls for NEET-PG:** * **Median Position:** 0 mm (Vocal cords meet in the midline; seen during phonation). * **Paramedian Position:** 3.5 mm (Seen in isolated RLN palsy). * **Cadaveric Position:** 7 mm (Seen in combined RLN and SLN palsy). * **Quiet Respiration:** 13.5 mm (Intermediate position). * **Full Abduction:** 18–19 mm (Total width including the posterior cartilaginous glottis; however, the membranous chink is ~13-14 mm). * **Semon’s Law:** States that in progressive organic lesions of the RLN, the abductor fibers (Posterior Cricoarytenoid) are paralyzed before the adductor fibers.

Q: Which muscle is the primary abductor of the vocal cords?

Posterior cricoarytenoid. The vocal cords are controlled by the intrinsic muscles of the larynx, which adjust the tension, length, and position of the vocal folds to facilitate phonation, breathing, and airway protection. **Explanation of the Correct Answer:** The **Posterior Cricoarytenoid (PCA)** is the **only abductor** of the vocal cords. It originates from the posterior surface of the cricoid lamina and inserts into the muscular process of the arytenoid cartilage. When it contracts, it rotates the arytenoid cartilages laterally, pulling the vocal processes apart and opening the glottis. Because it is the sole muscle responsible for opening the airway, it is often referred to as the **"Safety Muscle of the Larynx."** **Analysis of Incorrect Options:** * **B. Cricothyroid:** This muscle acts as a **tensor** of the vocal cords. It tilts the cricoid cartilage, increasing the distance between the thyroid and arytenoid cartilages, which elongates the cords and raises the pitch of the voice. It is the only intrinsic muscle supplied by the **External Laryngeal Nerve**. * **C. Interarytenoid:** This muscle (comprising transverse and oblique fibers) is an **adductor**. It pulls the two arytenoid cartilages together, closing the posterior part of the glottis. * **D. Lateral cricoarytenoid:** This is the **primary adductor** of the vocal cords. It rotates the arytenoids medially to close the rima glottidis for phonation. **NEET-PG Clinical Pearls:** * **Nerve Supply:** All intrinsic muscles of the larynx are supplied by the **Recurrent Laryngeal Nerve (RLN)**, *except* the Cricothyroid. * **Bilateral RLN Palsy:** If both RLNs are damaged (e.g., during thyroid surgery), the PCA muscles fail, leading to adducted vocal cords and acute airway obstruction (stridor), often requiring an emergency tracheostomy. * **Semon’s Law:** In progressive RLN injury, abductor fibers (PCA) are more vulnerable and paralyzed earlier than adductor fibers.

Q: Facial palsy in Herpes Zoster infection is seen in which syndrome?

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 lower motor neuron (LMN) facial nerve palsy. 2. Otalgia (severe ear pain). 3. Vesicular eruptions in the external auditory canal, concha, or pinna. Because the virus can also involve the vestibulocochlear nerve (CN VIII), patients may present with sensorineural hearing loss and 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**). * **Sturge-Weber Syndrome:** A neurocutaneous disorder (phakomatosis) characterized by a **Port-wine stain** (nevus flammeus) on the face, leptomeningeal angiomas, and glaucoma. It does not typically cause facial palsy. * **Guillain-Barré Syndrome:** An acute inflammatory demyelinating polyneuropathy. While it can cause **bilateral** facial nerve palsy, it is an ascending paralysis triggered by an immune response (often post-infection), not direct VZV reactivation. **High-Yield Clinical Pearls for NEET-PG:** * **Prognosis:** Facial palsy in Ramsay Hunt Syndrome is generally more severe and has a poorer recovery rate compared to Bell’s Palsy. * **Treatment:** Combination of oral **Acyclovir** (or Valacyclovir) and **Corticosteroids** started within 72 hours. * **Hitler’s Sign:** Vesicles on the tip of the nose (Hutchinson’s sign) in Herpes Zoster Ophthalmicus indicates involvement of the nasociliary nerve.

Q: What is the most common bacterial cause of rhinitis?

Haemophilus influenza. **Explanation:** The correct answer is **Haemophilus influenzae**. **1. Why Haemophilus influenzae is correct:** Rhinitis is most commonly viral in origin (e.g., Rhinovirus). However, when a secondary bacterial infection occurs or when discussing primary bacterial rhinitis, **Haemophilus influenzae** is the most frequently isolated pathogen. It is a commensal of the upper respiratory tract that becomes pathogenic when the local mucosal immunity is compromised, leading to purulent nasal discharge and mucosal edema. **2. Analysis of Incorrect Options:** * **Streptococcus haemolyticus (Group A Strep):** While a common cause of bacterial pharyngitis and tonsillitis, it is less common than *H. influenzae* as a primary cause of rhinitis. * **Pasteurella multocida:** This is typically associated with infections following animal bites (cats and dogs). It is not a standard pathogen for community-acquired rhinitis. * **Corynebacterium diphtheriae:** This causes Diphtheria, characterized by a greyish-white "pseudomembrane." While it can cause nasal diphtheria (presenting with blood-stained nasal discharge), it is rare due to widespread immunization and is not the "most common" cause. **3. NEET-PG High-Yield Pearls:** * **Most common cause of Acute Rhinitis:** Viruses (Rhinovirus is #1). * **Most common bacterial secondary invader:** *Haemophilus influenzae*, followed by *Streptococcus pneumoniae* and *Moraxella catarrhalis*. * **Clinical Presentation:** Bacterial rhinitis is characterized by a shift from clear/serous discharge to thick, mucopurulent (yellow-green) discharge. * **Nasal Diphtheria:** Always suspect this in a child with excoriation of the nares and a foul-smelling, blood-tinged nasal discharge.

Question 1

Hypothyroidism can cause all of the following symptoms except:

Accepted Answer

Dryness of mouth

Answer

Hoarseness

Answer

Nasal stuffiness

Answer

Vertigo

Question 2

Which laryngeal condition can present with hoarseness and stridor?

Accepted Answer

Neither unilateral nor bilateral vocal cord abductor paralysis

Answer

Unilateral vocal cord abductor paralysis

Answer

Bilateral vocal cord abductor paralysis

Answer

Both unilateral and bilateral vocal cord abductor paralysis

Question 3

In MPDS, which muscle is most likely to exhibit tenderness?

Accepted Answer

Lateral pterygoid

Answer

Tendon poratus

Answer

Buccinator

Answer

Masseter

Question 4

Which of the following statements about papilloma is incorrect?

Accepted Answer

Solitary papilloma is more aggressive, has a poor prognosis, and malignant transformation is common.

Answer

Solitary papilloma is more common in adults, and the most common presentation is a change in voice.

Answer

Multiple papilloma is more common in children, and the most common presentation is a hoarse cry.

Answer

Early treatment leads to better results in multiple papilloma.

Question 5

What is the management of stage I laryngeal carcinoma?

Accepted Answer

Radiotherapy

Answer

Partial laryngectomy

Answer

Total laryngectomy

Answer

Laser ablation

Question 6

Gutzmann's pressure test is done for which of the following conditions?

Accepted Answer

Puberphonia

Answer

Laryngomalacia

Answer

Laryngeal polyp

Answer

Vocal cord polyp

Question 7

What is the approximate width of the glottic chink in the cadaveric position of the vocal cords?

Accepted Answer

7 mm

Answer

3 mm

Answer

3.5 mm

Answer

19 mm

Question 8

Which muscle is the primary abductor of the vocal cords?

Accepted Answer

Posterior cricoarytenoid

Answer

Cricothyroid

Answer

Interarytenoid

Answer

Lateral cricoarytenoid

Question 9

Facial palsy in Herpes Zoster infection is seen in which syndrome?

Accepted Answer

Ramsay Hunt syndrome

Answer

Meckerson Rosenthal syndrome

Answer

Sturge Weber syndrome

Answer

Guillain-Barré syndrome

Question 10

What is the most common bacterial cause of rhinitis?

Accepted Answer

Haemophilus influenza

Answer

Streptococcus haemolyticus

Answer

Pasteurella multocida

Answer

Corynebacterium diphtheriae

Otolaryngology Basics — MCQs

Otolaryngology Basics — MCQs

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