Diseases of the Pharynx Practice Questions

Q: Which of the following is NOT a feature of Plummer-Vinson syndrome?

Common in elderly males. **Explanation:** Plummer-Vinson Syndrome (also known as **Paterson-Brown-Kelly Syndrome**) is characterized by a classic triad of **Iron Deficiency Anemia (IDA)**, **Dysphagia**, and **Cervical Esophageal Webs**. **Why Option D is the correct answer:** Plummer-Vinson Syndrome is characteristically seen in **middle-aged females** (typically between 30–50 years of age), not elderly males. The higher prevalence in females is attributed to blood loss during menstruation and nutritional deficiencies. **Analysis of Incorrect Options:** * **Option A (Esophageal web):** This is a hallmark feature. These are thin, mucosal folds usually found in the post-cricoid region (upper esophagus), causing dysphagia to solids. * **Option B (Predisposes to malignancy):** It is considered a **premalignant condition**. It significantly increases the risk of developing **Squamous Cell Carcinoma** of the post-cricoid region and upper esophagus. * **Option C (Koilonychia):** Since the syndrome is rooted in chronic iron deficiency, patients often present with systemic signs of IDA, such as **koilonychia** (spoon-shaped nails), glossitis (smooth red tongue), and angular cheilitis. **High-Yield Clinical Pearls for NEET-PG:** * **Investigation of Choice:** Barium Swallow (shows the web as a filling defect, best seen in the lateral view). * **Treatment:** Iron supplementation (often resolves the dysphagia) and endoscopic dilatation for persistent webs. * **Association:** It is frequently associated with an increased risk of **Post-cricoid carcinoma**. * **Mnemonic:** **P**lummer-Vinson = **P**remalignant, **P**ost-cricoid web, **P**allor (Anemia).

Q: Nasopharyngeal fibroma is composed of vascular and fibrous tissues. What is its characteristic nature?

A locally invasive benign lesion. **Explanation:** **Nasopharyngeal Angiofibroma (JNA)** is a histologically benign but clinically aggressive tumor. The correct answer is **C (A locally invasive benign lesion)** because, while the tumor does not metastasize (non-malignant), it lacks a true capsule and possesses a notorious ability to erode bone and invade adjacent structures. It typically spreads from the sphenopalatine foramen into the pterygopalatine fossa, infratemporal fossa, orbit, and even the cranial cavity. **Analysis of Incorrect Options:** * **A (Nasal polyp):** Nasal polyps are inflammatory outgrowths of the sinonasal mucosa. JNA is a true neoplastic vascular growth, not an inflammatory polyp. * **B (A benign lesion):** While histologically "benign," this option is incomplete. In NEET-PG, "locally invasive" is the more specific and accurate descriptor for JNA’s clinical behavior. * **D (Highly malignant lesion):** JNA does not show cellular atypia, increased mitosis, or distant metastasis, which are hallmarks of malignancy. **Clinical Pearls for NEET-PG:** * **Demographics:** Exclusively seen in **adolescent males** (testosterone-dependent). * **Classic Triad:** Profuse painless epistaxis, progressive nasal obstruction, and a mass in the nasopharynx. * **Radiology:** **Holman-Miller Sign** (antral sign) is pathognomonic—it shows anterior bowing of the posterior wall of the maxillary sinus on CT/MRI. * **Management:** Surgery is the treatment of choice. **Pre-operative embolization** (24–48 hours prior) is essential to reduce intraoperative bleeding. * **Contraindication:** **Biopsy is strictly contraindicated** in an office setting due to the risk of torrential, life-threatening hemorrhage.

Q: The "hot potato voice" is a characteristic clinical finding associated with which condition?

Quinsy. **Explanation:** **Quinsy (Peritonsillar Abscess)** is the correct answer. The "hot potato voice" (thick, muffled speech) occurs because the abscess causes significant edema and displacement of the soft palate and uvula. This limits the movement of the palate and tongue, making the patient speak as if they are trying to avoid burning their mouth with a hot potato. **Analysis of Options:** * **Quinsy (Correct):** Characterized by severe throat pain, trismus (due to irritation of the medial pterygoid muscle), and the classic muffled voice. On examination, the uvula is deviated to the opposite side. * **Retropharyngeal Abscess:** Typically presents with a "duck-like" cry (stridulous) or muffled voice, but is more associated with neck stiffness, dysphagia, and potential airway compromise in children. * **Ludwig's Angina:** This is a cellulitis of the submandibular space. While it causes "woody" swelling of the neck and elevation of the tongue, the primary vocal change is due to tongue displacement rather than the specific palatal immobility seen in Quinsy. * **Glottic Carcinoma:** This affects the vocal cords directly, leading to **hoarseness** (husky voice) rather than a muffled "hot potato" quality. **NEET-PG High-Yield Pearls:** * **Trismus** in Quinsy indicates involvement of the **medial pterygoid muscle**. * The most common organism isolated is *Streptococcus pyogenes*. * **Management:** Incision and drainage at the point of maximum bulge (usually lateral to the anterior pillar) followed by "Interval Tonsillectomy" 4–6 weeks later. * **Differential:** Always rule out Infectious Mononucleosis if bilateral symptoms are present.

Q: A foreign body is most commonly arrested in which part of the esophagus?

Above the cricopharynx. **Explanation:** The esophagus has four physiological constrictions where foreign bodies (FBs) are most likely to lodge. Among these, the **cricopharyngeal sphincter (upper esophageal sphincter)** is the narrowest point of the entire digestive tract (excluding the appendix). **Why "Above the cricopharynx" is correct:** The cricopharyngeus muscle acts as a physiological gatekeeper. Most swallowed foreign bodies (like coins, fish bones, or boluses) are larger than the resting lumen of this sphincter. Consequently, they get arrested in the **hypopharynx**, specifically in the **post-cricoid region** or the **piriform fossa**, just above the cricopharyngeal pinch. In clinical practice and imaging, this is the most common site (approx. 70-75%) for FB impaction. **Analysis of Incorrect Options:** * **A. The cervical esophagus:** While many FBs lodge just below the sphincter, the primary point of resistance is the sphincter itself or the space immediately superior to it. * **B. The middle third:** This is the site of the second and third constrictions (aortic arch and left main bronchus). While impaction occurs here, it is statistically less common than the cricopharyngeal level. * **C. Lower esophageal sphincter:** This is the site of the fourth constriction (diaphragmatic hiatus). It is a common site for food bolus impaction in adults with underlying pathology (like achalasia or strictures), but not the most common site overall. **NEET-PG High-Yield Pearls:** * **Most common FB in children:** Coins. * **Most common FB in adults:** Meat bolus/Fish bones. * **Radiology:** On X-ray (Lateral view), a FB at the cricopharynx lies **behind the larynx** and pushes the laryngeal airway forward. * **Orientation:** In the esophagus, a coin lies in the **coronal plane** (appears circular on AP view); if in the trachea, it lies in the sagittal plane. * **Management:** Rigid esophagoscopy is the gold standard for removal.

Q: Which of the following statements is NOT true regarding Ludwig's angina?

None of the above.. **Explanation:** Ludwig’s Angina is a rapidly spreading, life-threatening **cellulitis** (not an abscess) involving the submandibular space. The correct answer is **D (None of the above)** because options A, B, and C are all accurate clinical descriptions of the disease. 1. **Why Option A is true:** The most common cause (up to 90% of cases) is odontogenic infection, typically involving the **2nd and 3rd mandibular molars**. This is because their roots extend below the attachment of the mylohyoid muscle, allowing infection to spread directly into the submandibular space. 2. **Why Option B is true:** Ludwig’s Angina is defined by the bilateral involvement of the **submandibular space**, which is further divided by the mylohyoid muscle into the sublingual and submaxillary compartments. 3. **Why Option C is true:** The hallmark of the disease is "woody" edema of the floor of the mouth, which pushes the tongue upward and backward. This leads to acute airway obstruction, often necessitating an **emergency tracheostomy** if fiberoptic intubation fails. **High-Yield Clinical Pearls for NEET-PG:** * **Microbiology:** Usually a polymicrobial infection (Streptococci, Staphylococci, and anaerobes). * **Clinical Presentation:** Characterized by "Brawny edema," "Woody hard" swelling, and a "Hot potato voice." * **Key Sign:** There is typically **no fluctuance** because it is a cellulitis, not a localized abscess. * **Management:** Airway maintenance is the priority, followed by IV antibiotics and surgical decompression (incision and drainage) if conservative management fails.

Q: In Peritonsillar Abscess, pain is referred to the ear due to which nerve?

Glossopharyngeal Nerve. **Explanation:** The correct answer is **Glossopharyngeal Nerve (CN IX)**. **1. Why Glossopharyngeal Nerve is correct:** Peritonsillar abscess (Quinsy) involves the peritonsillar space, which is sensory-innervated by the **Glossopharyngeal nerve** via the tonsillar plexus. This nerve also provides sensory innervation to the middle ear through its **tympanic branch (Jacobson’s nerve)**. Due to this shared nerve pathway, the brain misinterprets pain signals originating from the oropharynx as coming from the ear. This phenomenon is known as **referred otalgia**. **2. Why other options are incorrect:** * **Facial Nerve (CN VII):** While it has a small sensory component to the external auditory canal, it does not innervate the tonsillar area. * **Vagus Nerve (CN X):** It causes referred otalgia via its auricular branch (Arnold’s nerve), but this is typically associated with pathologies of the **larynx or hypopharynx** (e.g., malignancy), not the tonsils. * **Auriculotemporal Nerve (Branch of V3):** This nerve supplies the TMJ and the pinna. Pain is referred via this nerve in cases of **dental caries or TMJ disorders**. **Clinical Pearls for NEET-PG:** * **Eagle’s Syndrome:** Elongated styloid process causing glossopharyngeal irritation, leading to throat pain and referred otalgia. * **Post-Tonsillectomy Pain:** Also referred to the ear via CN IX. * **Quinsy Triad:** Trismus (due to irritation of the medial pterygoid muscle), muffled "hot potato" voice, and uvular deviation to the opposite side. * **Management:** The treatment of choice for Quinsy is **Incision and Drainage** at the point of maximum bulge.

Q: All of the following cause a gray-white membrane on the tonsils, except?

Ludwig's angina. ### Explanation The presence of a **gray-white membrane** on the tonsils is a classic clinical sign of **Membranous Tonsillitis**. This occurs when an inflammatory exudate coalesces to form a false membrane over the tonsillar surface. **Why Ludwig’s Angina is the correct answer:** Ludwig’s angina is a **submandibular space infection** (cellulitis), usually of dental origin. It involves the submental, sublingual, and submandibular spaces. Clinically, it presents with "woody" hard swelling of the neck, elevation of the tongue, and potential airway obstruction. It is a soft tissue infection and **does not involve the formation of a membrane on the tonsils.** **Analysis of incorrect options:** * **Diphtheria:** The hallmark is a thick, leathery, grayish-white "pseudo-membrane" that is firmly adherent; attempting to remove it results in bleeding. * **Infectious Mononucleosis (EBV):** Characterized by exudative tonsillitis with a distinct white/gray membrane, accompanied by generalized lymphadenopathy and splenomegaly. * **Streptococcal Tonsillitis:** Acute follicular tonsillitis can progress to a membranous form where the purulent exudate from the crypts spreads to cover the tonsillar surface. **High-Yield Clinical Pearls for NEET-PG:** * **Differential Diagnosis of Tonsillar Membrane:** Diphtheria, Vincent’s Angina (foul-smelling), Infectious Mononucleosis, Agranulocytosis, Leukemia, and Candidiasis (Aphthous ulcers). * **Ludwig’s Angina Key Sign:** "Woody" or "Brawny" edema of the submandibular region; the most common cause is the **2nd and 3rd lower molar infection**. * **Diphtheria Test:** Schick test (susceptibility) and Elek's gel precipitation test (toxigenicity).

Q: Killian's dehiscence is found in which anatomical region?

Laryngopharynx. **Explanation:** **Killian’s dehiscence** is a potential weak area located in the posterior wall of the **laryngopharynx** (specifically the hypopharynx). It is a triangular gap situated between two parts of the inferior constrictor muscle: the upper oblique fibers (**thyropharyngeus**) and the lower horizontal fibers (**cricopharyngeus**). 1. **Why Laryngopharynx is Correct:** The inferior constrictor muscle is the lowermost muscle of the pharynx, forming the wall of the laryngopharynx. Killian’s dehiscence is clinically significant because it is the site of mucosal herniation in **Zenker’s diverticulum** (Pulsion diverticulum) due to high intrapharyngeal pressure during swallowing. 2. **Why other options are incorrect:** * **Oropharynx:** Located above the laryngopharynx; its muscles (middle constrictor) are well-supported and do not contain this specific dehiscence. * **Nasopharynx:** The uppermost part of the pharynx; the primary clinical concern here is the Fossa of Rosenmüller (site for nasopharyngeal carcinoma), not Killian's dehiscence. * **Lateral nasal wall:** This is an intranasal structure containing turbinates and meatuses, unrelated to the pharyngeal musculature. **High-Yield Clinical Pearls for NEET-PG:** * **Zenker’s Diverticulum:** Always occurs through Killian’s dehiscence. It is a "false" diverticulum (contains only mucosa and submucosa). * **Killian-Jamieson Area:** A separate weak area located *below* the cricopharyngeus, on the anterolateral aspect of the esophagus. * **Perforation Risk:** Killian’s dehiscence is the most common site for accidental pharyngeal perforation during rigid esophagoscopy.

Q: What is the most common site of origin for nasopharyngeal carcinoma?

Lateral wall. **Explanation:** **Nasopharyngeal Carcinoma (NPC)** is a unique malignancy with a strong association with the **Epstein-Barr Virus (EBV)**. **Why the Lateral Wall is Correct:** The most common site of origin for NPC is the **lateral wall** of the nasopharynx, specifically within a mucosal depression known as the **Fossa of Rosenmüller**. This fossa is located posterior to the medial end of the Eustachian tube orifice. Because of this proximity, early-stage tumors often obstruct the Eustachian tube, leading to unilateral serous otitis media—a classic clinical presentation. **Analysis of Incorrect Options:** * **Roof and Posterior Wall:** While the tumor can involve the roof (junction of the basisphenoid and basiocciput) and the posterior wall as it grows, these are secondary sites of extension rather than the primary site of origin. * **Anterior Wall:** The anterior wall of the nasopharynx is essentially the posterior choanae (opening into the nasal cavity). Primary malignancy rarely originates here; instead, tumors from the lateral wall may invade anteriorly into the nasal cavity. **High-Yield Clinical Pearls for NEET-PG:** * **Histology:** The most common type (WHO Type 3) is **Undifferentiated Carcinoma** (lymphoepithelioma), which is highly radiosensitive. * **Trotter’s Triad:** A classic diagnostic triad for NPC consisting of: 1. Conductive deafness (Eustachian tube blockage). 2. Ipsilateral temporofacial neuralgia (Trigeminal nerve involvement). 3. Palatal paralysis (Vagus nerve involvement). * **Presentation:** The most common presenting symptom is often a **painless upper deep cervical lymph node mass** (Level II/III). * **Treatment:** Radiotherapy is the primary treatment of choice for the local site and the neck.

Question 1

Which of the following is NOT a feature of Plummer-Vinson syndrome?

Accepted Answer

Common in elderly males

Answer

Esophageal web

Answer

Predisposes to malignancy

Answer

Koilonychia

Question 2

Nasopharyngeal fibroma is composed of vascular and fibrous tissues. What is its characteristic nature?

Accepted Answer

A locally invasive benign lesion

Answer

A nasal polyp

Answer

A benign lesion

Answer

A highly malignant lesion

Question 3

The "hot potato voice" is a characteristic clinical finding associated with which condition?

Accepted Answer

Quinsy

Answer

Retropharyngeal Abscess

Answer

Ludwig's Angina

Answer

Glottic carcinoma

Question 4

A foreign body is most commonly arrested in which part of the esophagus?

Accepted Answer

Above the cricopharynx

Answer

The cervical esophagus (below the cricopharynx)

Answer

The middle third of the esophagus

Answer

The lower esophageal sphincter

Question 5

Which of the following statements is NOT true regarding Ludwig's angina?

Accepted Answer

None of the above.

Answer

Usually arises from an infected molar.

Answer

Involves the submandibular space.

Answer

May necessitate an emergency tracheostomy.

Question 6

In Peritonsillar Abscess, pain is referred to the ear due to which nerve?

Accepted Answer

Glossopharyngeal Nerve

Answer

Facial Nerve

Answer

Vagus Nerve

Answer

Auriculotemporal Nerve

Question 7

All of the following cause a gray-white membrane on the tonsils, except?

Accepted Answer

Ludwig's angina

Answer

Infectious mononucleosis

Answer

Streptococcal tonsillitis

Answer

Diphtheria

Question 8

A case presenting with a gray-colored pseudomembrane whose removal is difficult and painful can be indicative of which of the following conditions?

Accepted Answer

Diphtheritic lesion

Answer

Acute necrotizing ulcerative gingivitis (ANUG)

Answer

Secondary stage of syphilis

Answer

Desquamative gingivitis

Question 9

Killian's dehiscence is found in which anatomical region?

Accepted Answer

Laryngopharynx

Answer

Oropharynx

Answer

Nasopharynx

Answer

Lateral nasal wall

Question 10

What is the most common site of origin for nasopharyngeal carcinoma?

Accepted Answer

Lateral wall

Answer

Roof

Answer

Posterior wall

Answer

Anterior wall

Diseases of the Pharynx — MCQs

Diseases of the Pharynx — MCQs

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