Diseases of the Pharynx Practice Questions

Q: A 14-year-old patient presents with cheek swelling and mild proptosis. What is the most likely diagnosis?

Nasopharyngeal angiofibroma. ***Nasopharyngeal angiofibroma*** - **Juvenile nasopharyngeal angiofibroma (JNA)** classically affects **adolescent males** and commonly presents with **cheek swelling** due to extension into the **infratemporal fossa**. - The **mild proptosis** indicates **orbital extension** through the **pterygopalatine fossa**, which is characteristic of advanced JNA cases. *Carcinoma* - **Nasopharyngeal carcinoma** is extremely rare in **adolescents** and typically occurs in adults over 40 years. - Usually presents with **unilateral hearing loss**, **cranial nerve palsies**, and **cervical lymphadenopathy** rather than cheek swelling. *Nasal polyp* - **Nasal polyps** are **inflammatory masses** that remain confined to the **nasal cavity** and **paranasal sinuses**. - They do not cause **cheek swelling** or **proptosis** as they lack the invasive growth pattern seen in JNA. *Foreign body* - **Nasal foreign bodies** typically cause **unilateral nasal obstruction** and **purulent discharge** but remain localized to the nasal cavity. - They do not extend beyond the nasal cavity to cause **cheek swelling** or **orbital involvement** with proptosis.

Q: Diverticulum through Killian's dehiscence is called:

Pharyngeal pouch. **Explanation:** **1. Why the Correct Answer is Right:** A **Pharyngeal pouch** (also known as **Zenker’s Diverticulum**) is a pulsion diverticulum caused by the herniation of the pharyngeal mucosa through a weak area in the posterior wall of the lower pharynx [1]. This weak spot is known as **Killian’s dehiscence**, which is located between the two parts of the inferior constrictor muscle: the upper oblique fibers (**thyropharyngeus**) and the lower horizontal fibers (**cricopharyngeus**) [1]. It typically occurs due to neuromuscular incoordination where the cricopharyngeus fails to relax during swallowing, leading to increased intraluminal pressure. **2. Why the Incorrect Options are Wrong:** * **Palatine pouch:** This is not a recognized clinical entity in this context. The palatine tonsils are located in the oropharynx between the tonsillar pillars, but they do not form diverticula through muscular dehiscence. * **Esophageal pouch:** While Zenker’s is often mislabeled as an esophageal diverticulum, it is technically a **false diverticulum** of the pharynx because it originates above the upper esophageal sphincter. True esophageal pouches (like traction diverticula) occur lower in the mid-esophagus. **3. NEET-PG High-Yield Clinical Pearls:** * **Type:** It is a **pulsion diverticulum** and a **false diverticulum** (contains only mucosa and submucosa). * **Clinical Presentation:** Characterized by dysphagia, **halitosis** (due to fermenting food), and **regurgitation** of undigested food [2]. * **Boyce’s Sign:** A gurgling sound heard on pressing the swelling in the neck [2]. * **Investigation of Choice:** **Barium Swallow** (shows a retort-shaped sac) [2]. * **Treatment:** Small pouches may be treated with endoscopic Dohlman’s procedure (stapling); larger ones require external diverticulectomy with cricopharyngeal myotomy [2].

Q: What is the classification of keratinizing squamous cell carcinoma of the nasopharynx?

Type I. The World Health Organization (WHO) classifies Nasopharyngeal Carcinoma (NPC) into three distinct histological types based on the degree of differentiation and keratinization. **Explanation of the Correct Answer:** * **Type I (Keratinizing Squamous Cell Carcinoma):** This type shows definite evidence of keratinization with the presence of intercellular bridges and/or keratin pearls. It is the least common type globally but has the strongest association with **smoking and alcohol** rather than the Epstein-Barr Virus (EBV). It carries the **worst prognosis** because it is less radiosensitive compared to the other types. **Explanation of Incorrect Options:** * **Type II (Non-keratinizing Differentiated Carcinoma):** These cells show maturation and clear cell margins but lack overt keratinization. It has a moderate association with EBV. * **Type III (Non-keratinizing Undifferentiated Carcinoma):** Also known as **Lymphoepithelioma** (Schmincke's tumor). It is the most common type, has the strongest association with **EBV titers**, and despite being aggressive, it has the **best prognosis** due to its high sensitivity to radiotherapy. * **Type IV:** There is no "Type IV" in the standard WHO classification for nasopharyngeal carcinoma. **High-Yield Clinical Pearls for NEET-PG:** * **Most Common Site:** Fossa of Rosenmüller. * **Triad of Trotter:** Conductive hearing loss (Eustachian tube blockage), Palatal paralysis (CN X palsy), and Temporofacial neuralgia (CN V palsy). * **EBV Association:** Types II and III are strongly linked to EBV; Type I is not. * **Treatment of Choice:** Radiotherapy is the primary treatment for all stages of NPC (specifically IMRT). Chemotherapy is added for advanced stages.

Q: A patient suffering from Eagle's syndrome complains of what symptom?

Dysphagia. **Explanation:** **Eagle’s Syndrome** (also known as Stylohyoid Syndrome) occurs due to an **elongated styloid process** (greater than 30 mm) or calcification of the **stylohyoid ligament**. This anatomical abnormality causes compression or irritation of nearby structures, primarily the glossopharyngeal nerve (CN IX) and the carotid arteries. **Why Dysphagia is the correct answer:** The elongated styloid process projects into the tonsillar fossa. During swallowing, the movement of the pharyngeal musculature causes the process to irritate the sensory fibers of the glossopharyngeal nerve and the pharyngeal constrictors. This results in **dysphagia** (difficulty swallowing), odynophagia (painful swallowing), and a persistent "foreign body" sensation in the throat (globus pharyngeus). **Analysis of Incorrect Options:** * **A & C (Burning sensation/Glossodynia):** While Eagle’s syndrome involves the glossopharyngeal nerve, it typically presents as sharp, lancinating pain triggered by swallowing or head rotation, rather than a generalized burning sensation or isolated tongue pain (glossodynia). * **B (Excessive salivation):** This is not a characteristic feature. Eagle’s syndrome is defined by mechanical irritation and neuropathic pain, not autonomic dysfunction of the salivary glands. **High-Yield Clinical Pearls for NEET-PG:** * **Classic Presentation:** A patient post-tonsillectomy (scar tissue formation around the styloid) presenting with unilateral throat pain radiating to the ear (referred otalgia). * **Diagnosis:** Palpation of the styloid process in the tonsillar fossa (reproduces pain) and confirmed by **3D-CT scan** (Gold Standard). * **Carotid Artery Syndrome:** A variant where the styloid compresses the carotid artery, leading to syncope or visual disturbances upon turning the head. * **Treatment:** Surgical shortening of the styloid process via a transoral or cervical approach (Styloidectomy).

Q: Which of the following statements about nasopharyngeal carcinoma is false?

Generally has a good prognosis. **Explanation:** Nasopharyngeal Carcinoma (NPC) is a unique head and neck cancer with distinct epidemiological and clinical characteristics. **Why Option C is False (The Correct Answer):** Nasopharyngeal carcinoma generally has a **poor prognosis**. This is due to several factors: the anatomical location makes surgical access difficult, the tumor is often clinically silent in early stages, and it has a high propensity for early lymphatic spread. Most patients present at an advanced stage (Stage III or IV), leading to lower overall survival rates compared to other head and neck cancers. **Analysis of Other Options:** * **Option A (Rhinolalia Clausa):** NPC originates in the nasopharynx (most commonly the Fossa of Rosenmüller). Large growths cause posterior nasal obstruction, leading to "hyponasality" or **rhinolalia clausa** (denasal speech). * **Option B (Radiotherapy):** Because NPC is highly radiosensitive and surgically inaccessible, **Radiotherapy is the primary treatment modality** for all stages. Chemotherapy is added for advanced stages (Concurrent Chemoradiotherapy). * **Option D (Horner’s Syndrome):** NPC is notorious for skull base invasion. Involvement of the **parapharyngeal space** can damage the cervical sympathetic chain, resulting in ipsilateral Horner’s syndrome (ptosis, miosis, anhidrosis). **High-Yield Clinical Pearls for NEET-PG:** * **Etiology:** Strongly associated with **Epstein-Barr Virus (EBV)** and dietary nitrosamines (salted fish). * **Trotter’s Triad:** 1. Conductive hearing loss (Eustachian tube blockage), 2. Ipsilateral facial pain (Trigeminal nerve involvement), 3. Palatal palsy. * **Most Common Presentation:** Level II/Upper jugular **painless cervical lymphadenopathy**. * **WHO Classification:** Type 1 (Keratinizing), Type 2 (Non-keratinizing), Type 3 (Undifferentiated/Lymphoepithelioma). Type 3 is the most common and most radiosensitive.

Q: Which anatomical region is NOT considered part of the hypopharynx?

Aryepiglottic folds. The **hypopharynx** (laryngopharynx) is the lowermost portion of the pharynx, extending from the level of the hyoid bone above to the lower border of the cricoid cartilage (C6 level) below. ### **Why "Aryepiglottic folds" is the correct answer:** Anatomically, the **aryepiglottic (AE) folds** are considered part of the **Larynx** (specifically the supraglottis), not the hypopharynx. While they form the medial boundary of the pyriform fossa, they are embryologically and functionally categorized as laryngeal structures. *Note: In some clinical staging systems (AJCC), the "marginal zone" of the AE folds is sometimes discussed in the context of hypopharyngeal spread, but for standard anatomical classification in NEET-PG, they belong to the Larynx.* ### **Analysis of Incorrect Options (Subsites of Hypopharynx):** The hypopharynx is divided into three distinct subsites: 1. **Pyriform Fossa (Sinus):** The largest subsite; these are two pear-shaped recesses on either side of the larynx. 2. **Post-cricoid Region:** Located behind the larynx, extending from the level of the arytenoid cartilages to the inferior border of the cricoid. 3. **Posterior Pharyngeal Wall:** Extends from the level of the hyoid bone to the inferior border of the cricoid cartilage. ### **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of Hypopharyngeal Cancer:** Pyriform Fossa (approx. 70%). * **Least common site:** Post-cricoid region (except in females with Plummer-Vinson Syndrome, where it is the most common). * **Killian’s Dehiscence:** A weak area between the thyropharyngeus and cricopharyngeus muscles (parts of the inferior constrictor) where Zenker’s diverticulum originates. * **Nerve Supply:** The sensory supply to the hypopharynx is via the **Internal Laryngeal Nerve** (branch of CN X). Irritation here often causes referred otalgia via Arnold’s nerve.

Q: A 14-year-old boy presents with a history of frequent nasal bleeding. His Hb was found to be 6.4 g/dL, and peripheral smear showed normocytic hypochromic anemia. What is the most probable diagnosis?

Juvenile nasopharyngeal angiofibroma. ### Explanation **Correct Answer: A. Juvenile nasopharyngeal angiofibroma (JNA)** The clinical presentation is classic for **Juvenile Nasopharyngeal Angiofibroma (JNA)**. The key diagnostic clues are: 1. **Demographics:** It occurs almost exclusively in **adolescent males** (14-year-old boy). 2. **Clinical Feature:** Profuse, recurrent, spontaneous epistaxis is the hallmark. 3. **Systemic Impact:** The severity of blood loss is highlighted by the **profound anemia** (Hb 6.4 g/dL). JNA is a benign but locally aggressive, highly vascular tumor arising from the sphenopalatine foramen. **Why other options are incorrect:** * **B. Hemangioma:** While vascular, hemangiomas of the nasal septum (Little’s area) usually cause minor spotting rather than life-threatening anemia requiring hospitalization. * **C. Antrochoanal Polyp:** These present primarily with progressive nasal obstruction and mucoid discharge. Bleeding is extremely rare unless the polyp is secondarily infected or traumatized. * **D. Carcinoma of Nasopharynx:** While it can cause epistaxis, it is rare in early adolescence and typically presents with the "Trotter’s Triad" (conductive deafness, palatal paralysis, and trigeminal neuralgia) along with cervical lymphadenopathy. **High-Yield Pearls for NEET-PG:** * **Origin:** Specifically the superior margin of the **sphenopalatine foramen**. * **Holman-Miller Sign:** Anterior bowing of the posterior wall of the maxillary antrum seen on CT (pathognomonic). * **Diagnosis:** Contrast-enhanced CT (CECT) is the investigation of choice. **Biopsy is contraindicated** due to the risk of torrential hemorrhage. * **Blood Supply:** Primarily the **Internal Maxillary Artery** (branch of the External Carotid). * **Classification:** Fisch or Radkowski classifications are used for staging.

Question 1

A 14-year-old patient presents with cheek swelling and mild proptosis. What is the most likely diagnosis?

Accepted Answer

Nasopharyngeal angiofibroma

Answer

Carcinoma

Answer

Nasal polyp

Answer

Foreign body

Question 2

Diverticulum through Killian's dehiscence is called:

Accepted Answer

Pharyngeal pouch

Answer

Palatine pouch

Answer

Esophageal pouch

Answer

None of the above

Question 3

What is the classification of keratinizing squamous cell carcinoma of the nasopharynx?

Accepted Answer

Type I

Answer

Type II

Answer

Type III

Answer

Type IV

Question 4

Which of the following statements about the palatine tonsil is incorrect?

Accepted Answer

Inflammation can lead to referred ear pain via the glossopharyngeal nerve.

Answer

Develops from the second pharyngeal pouch.

Answer

Its main blood supply is a branch of the facial artery.

Answer

It is covered by a fibrous capsule.

Question 5

A patient suffering from Eagle's syndrome complains of what symptom?

Accepted Answer

Dysphagia

Answer

Burning sensations in the mouth

Answer

Excessive salivation

Answer

Glossodynia

Question 6

Which of the following statements regarding foreign bodies in the oropharynx is FALSE?

Accepted Answer

Food particles are the most common oropharyngeal foreign bodies in children.

Answer

Impacted foreign bodies most often lodge in the soft tissue at the base of tongue.

Answer

Clinical hypopharyngeal foreign bodies are amenable to clinical examination.

Answer

Endoscopy and MDCT are used in the diagnosis.

Question 7

Which of the following statements about nasopharyngeal carcinoma is false?

Accepted Answer

Generally has a good prognosis

Answer

Associated with rhinolalia clausa

Answer

Radiotherapy is the main modality of treatment

Answer

Can present with Horner's syndrome

Question 8

Which anatomical region is NOT considered part of the hypopharynx?

Accepted Answer

Aryepiglottic folds

Answer

Posterior cricoid region

Answer

Posterior pharyngeal wall

Answer

Pyriform fossa

Question 9

A 14-year-old boy presents with a history of frequent nasal bleeding. His Hb was found to be 6.4 g/dL, and peripheral smear showed normocytic hypochromic anemia. What is the most probable diagnosis?

Accepted Answer

Juvenile nasopharyngeal angiofibroma

Answer

Hemangioma

Answer

Antrochoanal polyp

Answer

Carcinoma of nasopharynx

Question 10

Which of the following is NOT a contraindication to tonsillectomy?

Accepted Answer

Submucous fibrosis

Answer

Bleeding disorders

Answer

Epidemic of poliomyelitis

Answer

Acute tonsillitis

Diseases of the Pharynx — MCQs

Diseases of the Pharynx — MCQs

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