Diseases of the Pharynx Practice Questions

Q: What is 'Trench mouth'?

Ulcerative lesion of the tonsil. **Explanation:** **Trench Mouth**, also known as **Vincent’s Angina** or Acute Necrotizing Ulcerative Gingivitis (ANUG), is a painful, non-contagious infection of the gums and tonsils. 1. **Why Option C is correct:** The disease is characterized by the formation of "punched-out" **ulcerative lesions** covered by a gray pseudomembrane. When it involves the tonsils (Vincent’s Angina), it typically presents as a unilateral, painful ulcer on the superior pole of the tonsil. It is caused by a symbiotic infection of two organisms: a fusiform bacillus (*Fusobacterium nucleatum*) and a spirochete (*Borrelia vincentii*). The name "Trench Mouth" originated during World War I, as soldiers in the trenches frequently developed this condition due to poor oral hygiene, stress, and malnutrition. 2. **Why other options are incorrect:** * **Option A:** Submucosal fibrosis (OSMF) is a chronic, progressive premalignant condition associated with areca nut chewing, characterized by juxta-epithelial inflammatory reaction and progressive fibrosis of the oral cavity. * **Option B:** This is a distractor; tumors at the uveal angle relate to Ophthalmology, not pharyngeal pathology. * **Option C:** A retention cyst of the tonsil is a benign, yellowish-white cyst formed due to the blockage of a tonsillar crypt, usually asymptomatic and non-ulcerative. **High-Yield Clinical Pearls for NEET-PG:** * **Microbiology:** Look for the "Fusospirochetal complex" in the history. * **Clinical Presentation:** Foul breath (halitosis), metallic taste, and bleeding gums. * **Treatment:** Debridement, hydrogen peroxide mouthwashes, and antibiotics (Penicillin or Metronidazole). * **Differential Diagnosis:** Must be differentiated from Diphtheria (which has a tough, adherent membrane) and infectious mononucleosis.

Q: Progressive dysphagia initially for solids and later for liquids is the hallmark feature of carcinoma of which part of the pharynx?

Hypopharynx. **Explanation:** The hallmark clinical presentation of **Hypopharyngeal Carcinoma** (specifically the post-cricoid and pyriform sinus regions) is **progressive dysphagia**. Initially, the patient experiences difficulty swallowing solids, which eventually progresses to liquids as the tumor circumferentially involves the lumen or obstructs the food passage. This occurs because the hypopharynx is the narrowest part of the upper food passage, and symptoms often manifest only when the tumor has significantly narrowed the lumen. **Why other options are incorrect:** * **Nasopharynx:** The nasopharynx is primarily a respiratory passage. Carcinoma here typically presents with the "Trotter’s Triad" (conductive hearing loss, palatal paralysis, and trigeminal neuralgia) or a painless neck mass. Dysphagia is not a primary or early feature. * **Oropharynx:** While tumors here can cause dysphagia, the more characteristic early symptoms are "hot potato voice," odynophagia (painful swallowing), or a persistent sore throat. The wide caliber of the oropharynx means obstructive dysphagia often occurs much later compared to the hypopharynx. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** The **Pyriform Sinus** is the most common site for hypopharyngeal cancer. * **Post-cricoid Carcinoma:** Highly associated with **Plummer-Vinson (Paterson-Brown-Kelly) Syndrome** and is more common in females. * **Referred Otalgia:** Often the first symptom of hypopharyngeal cancer, mediated via the **Vagus nerve (Arnold’s nerve)**. * **Speculum sign:** Pooling of saliva in the pyriform fossa (Jackson’s sign) on indirect laryngoscopy is a strong clinical indicator of an obstructive growth in the hypopharynx or esophagus.

Q: Nasopharyngeal carcinoma causes deafness by which mechanism?

Blocking the Eustachian tube. **Explanation:** **Mechanism of Deafness in Nasopharyngeal Carcinoma (NPC):** Nasopharyngeal carcinoma most commonly arises from the **Fossa of Rosenmüller**, which is located immediately posterior to the opening of the Eustachian tube. As the tumor grows, it causes **mechanical obstruction of the Eustachian tube orifice**. This leads to negative middle ear pressure, transudation of fluid, and the development of **Secondary Otitis Media with Effusion (Serous Otitis Media)**. The resulting hearing loss is **conductive** in nature. **Analysis of Options:** * **A (Correct):** This is the primary, initiating mechanism. The physical blockage of the tube by the tumor mass is the root cause of subsequent ear pathology. * **B (Incorrect):** While Serous Otitis Media *is* the condition that causes the deafness, it is the **result** of the Eustachian tube blockage, not the primary mechanism of the tumor itself. In MCQ exams, always prioritize the "proximal" or "initiating" cause. * **C (Incorrect):** Temporal bone metastasis is rare in NPC and would typically present with sensorineural hearing loss or facial nerve palsy rather than simple conductive deafness. * **D (Incorrect):** Radiation can cause Eustachian tube dysfunction or osteoradionecrosis, but this occurs *after* treatment. Deafness is often the **presenting symptom** of the disease itself. **High-Yield Clinical Pearls for NEET-PG:** * **Trotter’s Triad:** A classic presentation of NPC consisting of: 1. Conductive deafness (due to ET blockage). 2. Ipsilateral soft palate paralysis (CN X involvement). 3. Trigeminal neuralgia (CN V involvement causing temporofacial pain). * **Unilateral Serous Otitis Media** in an adult is **Nasopharyngeal Carcinoma** until proven otherwise. Always perform an endoscopic examination of the nasopharynx. * **EBV Association:** NPC is strongly linked to the Epstein-Barr Virus.

Q: What is the most common causative organism for acute tonsillitis?

Streptococcus pyogenes. **Explanation:** Acute tonsillitis is an inflammation of the palatine tonsils, most commonly occurring in children and young adults. **1. Why Streptococcus pyogenes is correct:** While viruses (such as Adenovirus and Rhinovirus) are the most frequent cause of sore throats overall, **Group A Beta-Hemolytic Streptococcus (GABHS)**, specifically *Streptococcus pyogenes*, is the **most common bacterial cause** and the most clinically significant pathogen identified in acute tonsillitis. In the context of medical examinations like NEET-PG, when asked for the specific causative organism, *S. pyogenes* is the standard answer due to its association with complications like Rheumatic fever and Post-streptococcal glomerulonephritis. **2. Why the other options are incorrect:** * **Parainfluenza virus:** While viruses cause many cases of pharyngitis, Parainfluenza is more typically associated with Croup (Laryngotracheobronchitis) rather than isolated acute follicular tonsillitis. * **Haemophilus influenzae:** This is a common secondary invader in respiratory infections and a major cause of acute epiglottitis, but it is not the primary pathogen for typical acute tonsillitis. * **Corynebacterium species:** *Corynebacterium diphtheriae* causes Diphtheria, characterized by a "greyish-white tough membrane" on the tonsils. While serious, it is rare due to widespread immunization and is not the "most common" cause. **Clinical Pearls for NEET-PG:** * **Centor Criteria:** Used to clinically differentiate bacterial from viral tonsillitis (Fever, Tonsillar exudates, Tender anterior cervical lymphadenopathy, and Absence of cough). * **Treatment of Choice:** Penicillin remains the drug of choice for GABHS tonsillitis to prevent non-suppurative complications. * **Complication:** The most common complication of acute tonsillitis is **Peritonsillar abscess (Quinsy)**.

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

Sphenopalatine foramen. ### Explanation **Juvenile Nasopharyngeal Angiofibroma (JNA)** is a benign but locally aggressive, highly vascular tumor typically seen in adolescent males. **1. Why Sphenopalatine Foramen is Correct:** The current consensus on the site of origin for JNA is the **sphenopalatine foramen**, specifically at the junction where the sphenoid process of the palatine bone meets the horizontal portion of the pterygoid process. The tumor typically arises from the superior margin of this foramen and expands into the pterygopalatine fossa and the nasopharynx. **2. Analysis of Incorrect Options:** * **A. Roof of nasopharynx:** While the tumor clinically presents as a mass in the nasopharynx, this is a site of *extension*, not the primary site of origin. * **C. Vault of skull:** The tumor can erode the skull base (specifically the sphenoid bone) in advanced stages, but it does not originate here. * **D. Lateral wall of nose:** The tumor often pushes the lateral wall of the nose medially as it grows, but the primary nidus is more posterior and lateral at the sphenopalatine foramen. **3. Clinical Pearls for NEET-PG:** * **Demographics:** Almost exclusively seen in **adolescent males** (testosterone-dependent). * **Classic Triad:** Adolescent male + Profuse recurrent epistaxis + Nasal obstruction. * **Holman-Miller Sign (Antral Sign):** Forward bowing of the posterior wall of the maxillary sinus seen on CT/MRI. * **Diagnosis:** Contrast-enhanced CT (CECT) is the investigation of choice. **Biopsy is contraindicated** due to the risk of torrential hemorrhage. * **Treatment:** Surgical excision (Pre-operative embolization is often done to reduce blood loss).

Q: Which of the following are indications for adenoidectomy in children?

All of the above. **Explanation:** Adenoidectomy is one of the most common pediatric surgical procedures. The adenoids (nasopharyngeal tonsils) are part of Waldeyer’s ring; when they undergo pathological hypertrophy or become a reservoir for infection, they impact surrounding structures. **Why "All of the above" is correct:** 1. **Recurrent Rhinosinusitis:** Enlarged adenoids act as a **nidus for infection** (biofilms) and can physically obstruct the sinus ostia, preventing normal mucociliary clearance. This leads to persistent or recurrent sinus infections. 2. **Chronic Otitis Media with Effusion (COME):** The adenoids are located near the opening of the **Eustachian tube**. Hypertrophy causes mechanical obstruction, while chronic adenoiditis leads to ascending infection. This results in negative middle ear pressure and fluid accumulation (Glue Ear). Adenoidectomy is often performed alongside grommet insertion. 3. **Dental Malocclusion:** Chronic nasal obstruction leads to obligatory **mouth breathing**. This results in "Adenoid Facies," characterized by a high-arched palate, narrow upper arch, and protruding incisors (malocclusion). **High-Yield Clinical Pearls for NEET-PG:** * **Absolute Indications:** Sleep Apnea (OSAS) and suspicion of malignancy. * **Relative Indications:** Chronic adenoiditis, recurrent otitis media, and craniofacial growth anomalies. * **Adenoid Facies:** Key features include an elongated face, dull expression, open mouth, and hitched-up upper lip. * **Contraindications:** Overt or submucous **cleft palate** (risk of velopharyngeal insufficiency and hypernasal speech) and bleeding diathesis. * **Investigation of Choice:** Lateral view X-ray of the nasopharynx (soft tissue) to assess the airway space.

Q: All of the following are indications for tonsillectomy except?

Foreign body in tonsils. ### Explanation The correct answer is **A. Foreign body in tonsils**. **1. Why "Foreign body in tonsils" is the correct answer:** A foreign body (like a fish bone) lodged in the tonsil is an **acute emergency** managed by simple **removal** using forceps under direct vision or endoscopy. Tonsillectomy is an invasive surgical procedure and is not indicated for the simple removal of a foreign body unless the object is deeply embedded and inaccessible, which is rare. **2. Analysis of Incorrect Options:** * **Unilateral enlargement of tonsils (B):** This is a **mandatory indication** for tonsillectomy to rule out malignancy (e.g., Lymphoma or Squamous Cell Carcinoma), especially in adults. * **Keratosis Pharyngis/Keratin tonsil (C):** While often asymptomatic, if the keratotic patches (hard, white horny projections) cause persistent irritation, foreign body sensation, or cough, tonsillectomy is indicated as a definitive treatment. * **Recurrent Quinsy (D):** A history of **two or more episodes** of peritonsillar abscess (Quinsy) is a strong relative indication for tonsillectomy, usually performed 4–6 weeks after the infection subsides ("Interval Tonsillectomy"). **3. NEET-PG High-Yield Pearls:** * **Paradise Criteria:** The gold standard for recurrent tonsillitis: 7 episodes in 1 year, 5 per year for 2 years, or 3 per year for 3 years. * **Most common indication (Overall):** Recurrent tonsillitis. * **Most common indication (Children):** Obstructive Sleep Apnea (OSA) due to adenotonsillar hypertrophy. * **Eagle’s Syndrome:** Elongated styloid process causing throat pain; tonsillectomy is part of the surgical approach (trans-oral) to excise the process. * **Absolute Contraindications:** Uncontrolled bleeding disorders, acute infection (unless "Tonsillectomy à chaud"), and hemoglobin <10 g/dL.

Question 1

What is 'Trench mouth'?

Accepted Answer

Ulcerative lesion of the tonsil

Answer

Submucosal fibrosis

Answer

Tumor at the uveal angle

Answer

Retention cyst of the tonsil

Question 2

Progressive dysphagia initially for solids and later for liquids is the hallmark feature of carcinoma of which part of the pharynx?

Accepted Answer

Hypopharynx

Answer

Oropharynx

Answer

Nasopharynx

Answer

All of the above

Question 3

Nasopharyngeal carcinoma causes deafness by which mechanism?

Accepted Answer

Blocking the Eustachian tube

Answer

Serous otitis media

Answer

Temporal bone metastasis

Answer

Radiation effects

Question 4

What is the most common causative organism for acute tonsillitis?

Accepted Answer

Streptococcus pyogenes

Answer

Parainfluenza virus

Answer

Haemophilus influenzae

Answer

Corynebacterium species

Question 5

The pharyngeal diverticulum is a protrusion of the mucosa between which anatomical structures?

Accepted Answer

The two parts of the inferior constrictor muscle of the pharynx

Answer

The two parts of the middle constrictor muscle of the pharynx

Answer

The two parts of the superior constrictor muscle of the pharynx

Answer

Cricopharyngeal muscle and the posterior part of the suprahyoid membrane

Question 6

A patient complains of dysphagia, halitosis, and regurgitation of undigested food consumed several days prior. What is the most likely cause?

Accepted Answer

Zenker's diverticulum

Answer

Esophageal cancer

Answer

Corrosive esophagitis

Answer

Diffuse esophageal spasm

Question 7

What is the most common site of origin of nasopharyngeal angiofibroma?

Accepted Answer

Sphenopalatine foramen

Answer

Roof of nasopharynx

Answer

Vault of skull

Answer

Lateral wall of nose

Question 8

Which of the following are indications for adenoidectomy in children?

Accepted Answer

All of the above

Answer

Recurrent rhinosinusitis

Answer

Chronic otitis media with effusion

Answer

Dental malocclusion

Question 9

What is the standard surgical approach for glossopharyngeal neurectomy?

Accepted Answer

Tonsillectomy approach

Answer

Transpalatal approach

Answer

Transmandibular approach

Answer

Transpharyngeal approach

Question 10

All of the following are indications for tonsillectomy except?

Accepted Answer

Foreign body in tonsils

Answer

Unilateral enlargement of tonsils with suspected malignancy

Answer

Keratin tonsil

Answer

Recurrent quinsy

Diseases of the Pharynx — MCQs

Diseases of the Pharynx — MCQs

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