Diseases of the Pharynx Practice Questions

Q: What is the most common type of nasopharyngeal malignancy?

Squamous cell carcinoma. **Explanation:** **Nasopharyngeal Carcinoma (NPC)** is the most common malignancy of the nasopharynx. According to the **WHO classification**, NPC is categorized into three types: 1. **Type 1:** Keratinizing Squamous Cell Carcinoma (SCC) 2. **Type 2:** Non-keratinizing Squamous Cell Carcinoma 3. **Type 3:** Undifferentiated Carcinoma (formerly known as Lymphoepithelioma) Since all three WHO types are technically variants of **Squamous Cell Carcinoma**, it remains the most common histological diagnosis. In endemic regions (like Southern China), Type 2 and 3 are more prevalent and strongly associated with the **Epstein-Barr Virus (EBV)**, whereas Type 1 is more common in non-endemic areas and associated with smoking. **Analysis of Incorrect Options:** * **B. Lymphoma:** While the nasopharynx contains abundant lymphoid tissue (Waldeyer’s ring), lymphomas are the second most common malignancy, not the first. * **C. Adenocarcinoma:** These are rare in the nasopharynx and usually arise from minor salivary glands. * **D. Mixed variety:** This is not a standard histological classification for primary nasopharyngeal malignancies. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of origin:** Fossa of Rosenmüller. * **Trotter’s Triad:** Conductive hearing loss (due to Eustachian tube blockage), Ipsilateral temporofacial neuralgia (CN V involvement), and Palatal paralysis (CN X involvement). * **Most common presenting feature:** Level II cervical lymphadenopathy (often bilateral). * **Treatment of Choice:** Radiotherapy (NPC is highly radiosensitive); surgery is reserved for salvage.

Q: A 65-year-old patient presents with dysphagia, regurgitation, and halitosis. A barium swallow shows diverticula at the upper esophagus. Which of the following statements is FALSE about this condition?

It is more common in women.. ### Explanation The clinical presentation of dysphagia, regurgitation, and halitosis in an elderly patient, combined with a barium swallow showing a diverticulum, is diagnostic of **Zenker’s Diverticulum** (Pharyngeal Pouch). **1. Why Option A is the Correct (False) Statement:** Zenker’s diverticulum is significantly **more common in men** than in women (ratio approx. 2:1 or 3:1). It typically affects the elderly, usually in the 7th or 8th decade of life. **2. Analysis of Other Options:** * **Option B (Killian’s Triangle):** This is a true statement. The pouch is a **pulsion diverticulum** (mucosal herniation) occurring through a weak area between the horizontal fibers of the **cricopharyngeus** and the oblique fibers of the **thyropharyngeus** (inferior constrictor). * **Option C (Left-sided deviation):** This is true. Although it originates in the midline posteriorly, as the sac enlarges, it usually deviates to the **left side** because the esophagus lies slightly to the left of the midline and there is more space in the left prevertebral area. * **Option D (Treatment):** This is true. Management involves addressing the underlying cause (cricopharyngeal spasm) via **cricopharyngeal myotomy**. Small sacs may be left alone after myotomy, but larger ones require excision (**diverticulectomy**) or suspension (**diverticulopexy**). Endoscopic Dohlman’s procedure is also a modern alternative. ### High-Yield Clinical Pearls for NEET-PG: * **Boyce’s Sign:** A gurgling sound heard on the side of the neck when external pressure is applied to the pouch. * **Diagnosis:** **Barium Swallow** is the investigation of choice. * **Contraindication:** Rigid esophagoscopy or NG tube insertion should be avoided or done with extreme caution due to the high risk of **perforation**. * **Complications:** Aspiration pneumonia (most common) and rarely, Squamous Cell Carcinoma within the pouch.

Q: Pain from a malignant lesion in the pyriform fossa is referred to the ear via which nerve?

Vagus nerve. **Explanation:** The phenomenon of referred pain occurs when sensory fibers from two different anatomical sites converge on the same nucleus in the brainstem. In the case of the **pyriform fossa**, the correct answer is the **Vagus nerve (CN X)**. 1. **Why Vagus nerve is correct:** The pyriform fossa is part of the laryngopharynx (hypopharynx). Sensory innervation to the mucous membrane of the laryngopharynx is provided by the **Internal Laryngeal Nerve**, a branch of the Superior Laryngeal Nerve, which is itself a branch of the Vagus nerve. The Vagus nerve also provides sensory innervation to the external auditory canal and part of the pinna via **Arnold’s nerve (Auricular branch of Vagus)**. When a malignancy irritates the internal laryngeal nerve, the brain misinterprets the signals as coming from the ear. 2. **Why other options are incorrect:** * **Glossopharyngeal nerve (CN IX):** While this nerve also causes referred ear pain (via **Jacobson’s nerve**), it carries sensation from the **oropharynx** (e.g., tonsillitis or tonsillar fossa malignancy). * **Brachial plexus:** This involves spinal nerves C5-T1 and supplies the upper limb; it has no role in pharyngeal sensation or referred otalgia. **High-Yield Clinical Pearls for NEET-PG:** * **Referred Otalgia Summary:** * **Oropharynx/Tonsil/Base of Tongue:** Referred via CN IX (Jacobson’s Nerve). * **Laryngopharynx/Pyriform Fossa/Larynx:** Referred via CN X (Arnold’s Nerve). * **Nasopharynx:** Referred via CN V3 (Auriculotemporal Nerve). * **TMJ/Lower Teeth:** Referred via CN V3. * **Clinical Significance:** In an elderly patient or a chronic smoker presenting with "normal-looking" ears but complaining of earache (referred otalgia), always perform a fiberoptic laryngoscopy to rule out a hidden malignancy in the pyriform fossa or base of tongue.

Q: All are true about Parapharyngeal abscess, except?

Midline swelling. **Explanation:** The **Parapharyngeal space** (also known as the pharyngomaxillary or lateral pharyngeal space) is an inverted pyramid-shaped potential space located lateral to the pharynx. **1. Why "Midline Swelling" is the correct (False) statement:** A parapharyngeal abscess typically presents as a **lateral neck swelling** (below the angle of the mandible) and a **medial displacement of the lateral pharyngeal wall and tonsil**. Because the space is situated lateral to the constrictor muscles, the swelling is inherently eccentric. In contrast, a **Retropharyngeal abscess** is the classic cause of a midline or paramedian bulge in the posterior pharyngeal wall. **2. Analysis of other options:** * **Abscess in pharyngomaxillary space:** This is the anatomical synonym for the parapharyngeal space. * **Trismus:** This occurs due to irritation and spasm of the **medial pterygoid muscle**, which forms the lateral boundary of the anterior compartment of this space. * **Torticollis:** Inflammation of the prevertebral muscles or irritation of the accessory nerve can lead to a "wry neck" or tilting of the head toward the unaffected side to relieve pressure. **Clinical Pearls for NEET-PG:** * **Source of Infection:** Most commonly follows acute tonsillitis, dental infections (lower molars), or Bezold’s abscess. * **Compartments:** Divided by the styloid process into **Pre-styloid** (contains fat, nodes, and pterygoids; presents with trismus) and **Post-styloid** (contains Carotid artery, IJV, and CN IX-XII; presents with neurological deficits but NO trismus). * **Complications:** The most dreaded complication is **Internal Jugular Vein Thrombophlebitis (Lemierre’s Syndrome)** or Carotid artery erosion.

Q: The sinus of Morgagni is present in which of the following locations?

Nasopharynx. ### Explanation The **Sinus of Morgagni** is a critical anatomical space located in the **Nasopharynx**. It is a gap in the pharyngeal wall situated between the upper border of the **Superior Constrictor muscle** and the **Base of the Skull**. #### Why Nasopharynx is Correct: The pharyngeal wall is not a continuous muscular layer. In the nasopharynx, there is a deficiency in the muscle layer where the Superior Constrictor does not reach the skull base. This gap is closed by the **pharyngobasilar fascia**. The Sinus of Morgagni serves as a conduit for three important structures to enter the pharynx: 1. **Eustachian tube** (Cartilaginous portion) 2. **Levator veli palatini** muscle 3. **Ascending palatine artery** (branch of the facial artery) #### Why Other Options are Incorrect: * **Oropharynx:** This region lies below the soft palate. The gaps here (e.g., between superior and middle constrictors) transmit the stylopharyngeus muscle and glossopharyngeal nerve, but are not termed the Sinus of Morgagni. * **Hypopharynx/Laryngopharynx:** These terms are synonymous. This region contains the **Killian’s Dehiscence** (a potential site for Zenker’s diverticulum) between the thyropharyngeus and cricopharyngeus muscles, but not the Sinus of Morgagni. #### NEET-PG High-Yield Pearls: * **Passavant’s Ridge:** A mucosal ridge formed by the palatopharyngeal sphincter in the nasopharynx during swallowing. * **Fossa of Rosenmüller:** A deep recess located posterior to the Eustachian tube orifice in the nasopharynx; it is the most common site of origin for **Nasopharyngeal Carcinoma**. * **Trotter’s Triad:** Associated with nasopharyngeal tumors invading the Sinus of Morgagni, characterized by: 1. Conductive deafness (Eustachian tube blockage) 2. Ipsilateral facial pain/temporoparietal neuralgia (V2/V3 involvement) 3. Palatal paralysis (Levator veli palatini involvement)

Q: What is the most common site of esophageal rupture during rigid bronchoscopy?

Cervical region. **Explanation:** The most common site of esophageal rupture during instrumentation (such as rigid bronchoscopy or esophagoscopy) is the **cervical region**, specifically at the **Cricopharyngeal sphincter (C6 level)**. **1. Why the Cervical Region is Correct:** The cricopharyngeus muscle acts as the "gatekeeper" of the esophagus and is the narrowest part of the entire alimentary tract. During rigid bronchoscopy, the neck is extended, which compresses the esophagus against the prominent bodies of the cervical vertebrae. The posterior wall of the esophagus at this level is thin and lacks a longitudinal muscle layer (Killian’s dehiscence), making it highly susceptible to perforation when the rigid instrument is being introduced. **2. Why the Other Options are Incorrect:** * **Cardiac region & Gastroesophageal junction:** While these are sites of physiological narrowing, they are more flexible and less likely to be injured by the initial passage of a rigid scope compared to the cricopharyngeus. Perforations here are more common during forceful pneumatic dilation for Achalasia Cardia. * **Mid esophagus:** This area is relatively wider. Perforations here are usually due to foreign bodies or malignancy rather than iatrogenic trauma from a rigid scope. **Clinical Pearls for NEET-PG:** * **Most common site of iatrogenic perforation:** Cricopharyngeus (Cervical esophagus). * **Most common site of spontaneous rupture (Boerhaave Syndrome):** Left posterolateral aspect of the lower 1/3rd of the esophagus (just above the diaphragm). * **Killian’s Dehiscence:** A potential weak spot between the thyropharyngeus and cricopharyngeus muscles, also the site for Zenker’s Diverticulum. * **Early sign of perforation:** Surgical emphysema (crepitus) in the neck.

Question 1

Which of the following statements is NOT true about acute retropharyngeal abscess?

Accepted Answer

Caries of the cervical spine is usually a common cause

Answer

Torticollis

Answer

Swelling on posterolateral wall

Answer

Dysphagia

Question 2

What is the most common type of nasopharyngeal malignancy?

Accepted Answer

Squamous cell carcinoma

Answer

Lymphoma

Answer

Adenocarcinoma

Answer

Mixed variety

Question 3

A 65-year-old patient presents with dysphagia, regurgitation, and halitosis. A barium swallow shows diverticula at the upper esophagus. Which of the following statements is FALSE about this condition?

Accepted Answer

It is more common in women.

Answer

It arises from Killian's triangle.

Answer

It usually deviates from the midline, mostly to the left.

Answer

Treatment involves myotomy of the cricopharyngeus muscle and excision of the sac.

Question 4

What is the most common cause of parapharyngeal abscess in adults?

Accepted Answer

Tooth extraction

Answer

Tuberculosis

Answer

Tonsillitis

Answer

Lymphadenitis

Question 5

Pain from a malignant lesion in the pyriform fossa is referred to the ear via which nerve?

Accepted Answer

Vagus nerve

Answer

Glossopharyngeal nerve

Answer

Brachial plexus

Answer

None of the above

Question 6

Tonsillectomy is recommended if the number of acute infections in a year exceeds:

Accepted Answer

3

Answer

4

Answer

5

Answer

6

Question 7

All are true about Parapharyngeal abscess, except?

Accepted Answer

Midline swelling

Answer

Abscess in pharyngomaxillary space

Answer

Trismus

Answer

Torticollis

Question 8

The sinus of Morgagni is present in which of the following locations?

Accepted Answer

Nasopharynx

Answer

Oropharynx

Answer

Hypopharynx

Answer

Laryngopharynx

Question 9

Which of the following is NOT true for adenoid hypertrophy?

Accepted Answer

CT scan should be done to assess size

Answer

Mouth breathing is seen

Answer

High arched palate is present

Answer

There is failure to thrive

Question 10

What is the most common site of esophageal rupture during rigid bronchoscopy?

Accepted Answer

Cervical region

Answer

Cardiac region

Answer

Mid esophagus

Answer

Gastroesophageal junction

Diseases of the Pharynx — MCQs

Diseases of the Pharynx — MCQs

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