Diseases of the Pharynx Practice Questions

Q: A 65-year-old patient presents with dysphagia and regurgitation. Barium swallow imaging is provided. What is the diagnosis?

Epiphrenic diverticulum. ***Epiphrenic diverticulum*** - Located in the **distal esophagus** just above the **diaphragm**, which would be clearly visible on barium swallow imaging as a pouch-like outpouching in the lower third of the esophagus. - Commonly presents with **dysphagia** and **regurgitation** in elderly patients due to impaired esophageal motility and increased intraluminal pressure. *Paraesophageal hernia* - Involves herniation of the **gastric fundus** through the **diaphragmatic hiatus** alongside the esophagus, appearing as stomach contents above the diaphragm on barium swallow. - Typically presents with **chest pain** and **early satiety** rather than primarily dysphagia and regurgitation. *Zenker's diverticulum* - Located in the **hypopharynx** at the **pharyngoesophageal junction** (upper esophageal sphincter level), appearing much higher on barium swallow imaging. - Presents with **halitosis**, **nocturnal coughing**, and regurgitation of **undigested food**, often with a palpable neck mass. *Diaphragmatic hernia* - Shows **abdominal organs** (stomach, bowel) displaced into the **thoracic cavity** through a diaphragmatic defect on imaging. - More commonly presents with **respiratory symptoms** and **chest pain** rather than isolated dysphagia and regurgitation.

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: Which of the following is NOT a contraindication for routine tonsillectomy?

Diphtheria carriers. **Explanation:** The correct answer is **C. Diphtheria carriers**. In clinical practice, being a diphtheria carrier is actually an **indication** for tonsillectomy, not a contraindication. If the carrier state persists despite adequate antibiotic therapy (Penicillin or Erythromycin), the tonsils act as a reservoir for *Corynebacterium diphtheriae*, and their surgical removal is necessary to eliminate the carrier state. **Analysis of Options:** * **Bleeding Disorders (Option B):** This is a **major contraindication**. Conditions like hemophilia, leukemia, or purpura pose a life-threatening risk of primary or reactionary hemorrhage during or after surgery. * **Cleft Palate (Option D):** This is a **relative contraindication**. The tonsils and adenoids help in velopharyngeal closure. Removing them in a patient with a cleft palate can lead to or worsen velopharyngeal insufficiency, resulting in hypernasal speech (rhinolalia aperta). * **Recurrent Upper Respiratory Tract Infections (Option A):** While chronic tonsillitis is an indication, surgery should **not** be performed during an **acute** infection. Tonsillectomy is contraindicated during an active URI or acute tonsillitis phase because the increased vascularity of the tissues significantly raises the risk of excessive intraoperative bleeding. **NEET-PG High-Yield Pearls:** * **Absolute Indications:** Sleep apnea (OSAS), suspicion of malignancy (asymmetric tonsil), and recurrent peritonsillar abscess (Quinsy). * **Paradise Criteria:** Used to justify tonsillectomy for recurrent tonsillitis (7 episodes in 1 year, 5 per year for 2 years, or 3 per year for 3 years). * **Age Factor:** Usually avoided below 3 years of age due to the risk of blood loss and metabolic upset.

Q: Thornwaldt's abscess is seen in which condition?

Pharyngeal bursitis. **Explanation:** **Thornwaldt’s abscess** (also known as Thornwaldt’s cyst) is a clinical manifestation of **Pharyngeal bursitis**. It occurs due to the infection or inflammation of the **Thornwaldt’s bursa**, which is a persistent median embryological remnant of the notochord. This bursa is located in the midline of the nasopharynx, deep to the superior constrictor muscle and just above the adenoid tissue. When the opening of this bursa becomes occluded, it leads to cyst formation; if this cyst becomes infected, it results in an abscess. **Analysis of Options:** * **B. Pharyngeal bursitis (Correct):** As explained, the abscess is a direct complication of an infected nasopharyngeal bursa. * **A. Ludwig’s Angina:** This is a rapidly spreading cellulitis of the submandibular, sublingual, and submental spaces, usually arising from dental infections. It does not involve the nasopharyngeal bursa. * **C. Lateral Sinus Thrombosis:** This is a complication of chronic suppurative otitis media (CSOM) involving a blood clot in the sigmoid sinus. * **D. Hydrocephalus:** This refers to the accumulation of cerebrospinal fluid in the brain ventricles and is unrelated to pharyngeal pathology. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Always in the **midline** of the posterior wall of the nasopharynx. * **Clinical Presentation:** Often asymptomatic, but if infected, it presents with persistent post-nasal discharge, dull occipital headache, halitosis, and a foul taste. * **Diagnosis:** Nasopharyngoscopy shows a smooth, midline fluctuant mass. **MRI** is the imaging modality of choice. * **Treatment:** Surgical excision or marsupialization (usually via endoscopic approach).

Q: What is the initial imaging of choice for angiofibroma?

CT scan. **Explanation:** **Juvenile Nasopharyngeal Angiofibroma (JNA)** is a benign but locally aggressive, highly vascular tumor typically seen in adolescent males. **1. Why CT Scan is the Correct Answer:** Contrast-enhanced CT (CECT) is the **initial imaging of choice** because it provides excellent detail of the bony anatomy. It characteristically shows the **Holman-Miller sign** (or Antral sign), which is the anterior bowing of the posterior wall of the maxillary sinus. CT is superior for assessing bone erosion at the skull base and the widening of the pterygopalatine fossa, which are critical for staging and surgical planning. **2. Why Other Options are Incorrect:** * **Plain X-ray:** Lacks the resolution to define the extent of the tumor or subtle bony changes; it is obsolete for this diagnosis. * **MRI:** While MRI is the best modality for evaluating soft tissue extension (e.g., intracranial or intraorbital spread), it is usually performed *after* the initial CT scan. * **Angiography:** This is the **gold standard** for confirming the diagnosis and identifying the feeding vessel (most commonly the Internal Maxillary Artery). However, it is an invasive procedure reserved for preoperative **embolization** to reduce intraoperative bleeding, not for initial screening. **Clinical Pearls for NEET-PG:** * **Classic Triad:** Adolescent male + Profuse recurrent epistaxis + Nasal obstruction. * **Site of Origin:** Sphenopalatine foramen. * **Holman-Miller Sign:** Pathognomonic radiological finding on CT. * **Biopsy is Contraindicated:** Due to the risk of torrential hemorrhage; diagnosis is based on clinical and radiological findings. * **Treatment:** Surgical excision (Preceded by embolization).

Q: According to the WHO classification, to which category does undifferentiated carcinoma of the nasopharynx belong?

Type 3. ### Explanation The World Health Organization (WHO) classifies Nasopharyngeal Carcinoma (NPC) into three distinct histopathological types based on the degree of differentiation and keratinization. This classification is crucial for NEET-PG as it correlates with etiology (EBV association) and prognosis. **Why Type 3 is Correct:** **Type 3 (Undifferentiated Carcinoma)** is characterized by cells that show no evidence of keratinization under light microscopy. It often presents with a prominent lymphocytic infiltrate, historically referred to as **Schmincke’s tumor** or **lymphoepithelioma**. This type has the strongest association with **Epstein-Barr Virus (EBV)**, is highly radiosensitive, and has a better prognosis compared to Type 1. **Analysis of Incorrect Options:** * **Type 1 (Squamous Cell Carcinoma):** This is the **keratinizing** variety. It is least associated with EBV and is more commonly linked to smoking and alcohol. It has the worst prognosis because it is less sensitive to radiotherapy. * **Type 2 (Non-keratinizing Squamous Cell Carcinoma):** This type shows cellular differentiation but lacks overt keratinization (no keratin pearls). It occupies an intermediate position between Type 1 and Type 3. * **Type 4:** There is no "Type 4" 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 (due to ET blockage), Ipsilateral palatal palsy, and Trigeminal neuralgia (V2 involvement). * **EBV Markers:** Elevated titers of **IgA antibodies against Viral Capsid Antigen (VCA)** are used for screening and monitoring recurrence. * **Treatment of Choice:** Radiotherapy (NPC is highly radiosensitive). Surgery is reserved for salvage (neck nodes).

Q: What is the location of Killian dehiscence?

Between the inferior constrictor. **Explanation:** **Killian’s Dehiscence** is a weak triangular area in the posterior wall of the pharynx. It is located **between the two components of the inferior constrictor muscle**: 1. **Thyropharyngeus:** The upper oblique fibers. 2. **Cricopharyngeus:** The lower horizontal fibers (which act as the upper esophageal sphincter). The correct answer is **B** because this dehiscence represents a potential gap where the pharyngeal mucosa can herniate due to increased intrapharyngeal pressure, leading to the formation of a **Zenker’s Diverticulum** (Pulsion diverticulum). **Analysis of Incorrect Options:** * **Option A:** The area below the superior constrictor (Sinus of Morgagni) is where the Eustachian tube and levator veli palatini enter; it is not the site of Killian’s dehiscence. * **Option C:** The area below the cricopharyngeus is known as **Killian-Jamieson area**. Herniation here results in a Killian-Jamieson diverticulum, which is lateral, not posterior. * **Option D:** The upper one-third of the esophagus consists of skeletal muscle, not smooth muscle. This anatomical landmark is unrelated to pharyngeal pouches. **High-Yield Clinical Pearls for NEET-PG:** * **Zenker’s Diverticulum:** Always emerges through Killian’s dehiscence. It is a **false diverticulum** (contains only mucosa and submucosa). * **Symptoms:** Dysphagia, regurgitation of undigested food, halitosis (foul breath), and a "gurgling" sound in the neck. * **Boyce’s Sign:** Swelling in the neck (usually left side) that gurgles on compression. * **Investigation of Choice:** Barium Swallow (shows a pouch behind the esophagus). * **Treatment:** Endoscopic Dohlman’s procedure (stapling) or open diverticulectomy with cricopharyngeal myotomy.

Q: X-ray showing an air column between a soft tissue mass and the posterior wall of the nasopharynx is suggestive of which condition?

Antrochoanal polyp. **Explanation:** The correct answer is **Antrochoanal polyp (B)**. An Antrochoanal polyp (ACP) originates from the maxillary sinus mucosa, exits through the accessory ostium, and extends posteriorly through the choana into the nasopharynx. On a lateral view X-ray of the soft tissue neck/nasopharynx, the polyp appears as a well-defined, smooth, globular soft tissue mass. The characteristic radiological sign is a **distinct air column** visible between the posterior border of the polyp and the posterior pharyngeal wall. This occurs because the polyp hangs freely in the nasopharyngeal space and does not invade or arise from the pharyngeal wall itself. **Analysis of Incorrect Options:** * **Ethmoidal polyp (A):** These are usually multiple, bilateral, and grape-like clusters that rarely grow large enough to present as a single massive nasopharyngeal lesion with a clear posterior air column. * **Nasal myiasis (C):** This is a parasitic infestation by maggots (usually *Chrysomya bezziana*). It presents with foul-smelling discharge, crusting, and tissue destruction, rather than a discrete soft tissue mass on X-ray. **High-Yield Clinical Pearls for NEET-PG:** * **Origin:** ACP most commonly arises from the **maxillary sinus** (specifically the lateral wall or floor). * **Clinical Presentation:** Typically seen in children and young adults; presents with **unilateral** nasal obstruction. * **Radiology:** On CT scan, it shows the "dumbbell" shape or opacification of the maxillary sinus with extension into the choana. * **Treatment of Choice:** Functional Endoscopic Sinus Surgery (FESS) to remove the polyp and its antral attachment to prevent recurrence. (Historical treatment: Caldwell-Luc surgery).

Question 1

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 2

A 65-year-old patient presents with dysphagia and regurgitation. Barium swallow imaging is provided. What is the diagnosis?

Accepted Answer

Epiphrenic diverticulum

Answer

Paraesophageal hernia

Answer

Zenker's diverticulum

Answer

Diaphragmatic hernia

Question 3

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 4

Which of the following is NOT a contraindication to tonsillectomy?

Accepted Answer

Submucous fibrosis

Answer

Bleeding disorders

Answer

Epidemic of poliomyelitis

Answer

Acute tonsillitis

Question 5

Which of the following is NOT a contraindication for routine tonsillectomy?

Accepted Answer

Diphtheria carriers

Answer

Recurrent upper respiratory tract infections

Answer

Bleeding disorder

Answer

Cleft palate

Question 6

Thornwaldt's abscess is seen in which condition?

Accepted Answer

Pharyngeal bursitis

Answer

Ludwig angina

Answer

Lateral sinus thrombosis

Answer

Hydrocephalus

Question 7

What is the initial imaging of choice for angiofibroma?

Accepted Answer

CT scan

Answer

Plain X-ray

Answer

MRI

Answer

Angiography

Question 8

According to the WHO classification, to which category does undifferentiated carcinoma of the nasopharynx belong?

Accepted Answer

Type 3

Answer

Type 1

Answer

Type 2

Answer

Type 4

Question 9

What is the location of Killian dehiscence?

Accepted Answer

Between the inferior constrictor

Answer

Below the superior constrictor

Answer

Below the cricopharyngeal muscle

Answer

Below the upper one-third of the smooth muscle of the esophagus

Question 10

X-ray showing an air column between a soft tissue mass and the posterior wall of the nasopharynx is suggestive of which condition?

Accepted Answer

Antrochoanal polyp

Answer

Ethmoidal polyp

Answer

Nasal myiasis

Answer

None of the above

Diseases of the Pharynx — MCQs

Diseases of the Pharynx — MCQs

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