Diseases of the Pharynx Practice Questions

Q: A patient presents with an ulcer on the posterior pharyngeal wall, as shown in the image. This lesion most likely originates from which structure?

Pharyngeal mucosa. ***Pharyngeal mucosa*** - Ulcers on the posterior pharyngeal wall are frequently associated with mucosal pathologies, where the loss of epithelial continuity exposes the underlying connective tissue. - This structure is the primary site of origin for inflammatory, infectious, or sometimes early neoplastic lesions in the oropharynx. *Minor salivary glands* - Lesions originating from minor salivary glands are typically firm, nodular, or present as a painless swelling rather than a primary ulcerated base. - These glands are usually located within the submucosa, and while their pathology can lead to surface ulceration, it is less common than primary mucosal lesions. *Subepithelial region* - Pathology arising primarily in the subepithelium often manifests as masses, cysts, or deep-seated abscesses rather than superficial mucosal ulceration. - Lesions here are more likely to cause displacement of the mucosa rather than immediate surface destruction. *Lymphoid tissue* - While lymphoid tissue (like the pharyngeal tonsils/adenoids) is abundant in the pharynx, primary ulceration is uncommon unless associated with specific pathologies like infectious mononucleosis or lymphoma. - Hypertrophy (enlargement) is the most frequent clinical presentation of lymphoid tissue, rather than singular ulceration.

Q: A child presents with a history of accidental coin ingestion. The X -ray is as shown in the image. The coin is most likely lodged in which site?

Esophagus. ***Esophagus*** - Foreign bodies, such as coins, classically lodge in the **esophagus** at the **cricopharyngeus muscle** (the narrowest part of the upper esophagus), making it the most common site for entrapment. - On an **AP X-ray view**, esophageal coins appear **en face** (round shape) because the esophagus is located posterior to the trachea, leading to a coronal orientation of the object. *Larynx* - The **larynx** is part of the airway, and a foreign body here would typically present with acute **respiratory distress**, stridor, or cyanosis rather than being an incidental radiographic finding. - Radiographically, an object in the larynx would be oriented in the sagittal plane, appearing **on edge** rather than as a round coin. *Trachea* - Tracheal foreign bodies cause significant **airway obstruction**, manifesting as wheezing, cough, or severe dyspnea, which differs from the clinical presentation of a stable, asymptomatic coin ingestion. - Like the larynx, objects within the **trachea** are oriented sagittally due to the anterior-posterior alignment of the airway, presenting as an **on edge** shadow on an AP radiograph. *Hypopharynx* - While a foreign body can lodge in the **pyriform fossa** of the hypopharynx, this location is significantly less common than the **cricopharyngeus** for coin impaction. - Persistent foreign bodies in the **hypopharynx** usually cause difficulty swallowing (dysphagia) or sialorrhea rather than the classically asymptomatic presentation seen with esophageal coins.

Q: A patient presents with difficulty swallowing and regurgitation of undigested food with foul- smelling breath. The lateral neck X-ray is as shown. The diverticulum occurs due to herniation between which muscles?

Cricopharyngeus and Thyropharyngeus. ***Cricopharyngeus and Thyropharyngeus*** - Zenker's diverticulum is a **pharyngoesophageal diverticulum** caused by the herniation of mucosa through **Killian's dehiscence**, a point of weakness in the posterior pharyngeal wall. - This anatomical gap is located between the **thyropharyngeus** (oblique fibers) and the **cricopharyngeus** (transverse fibers) muscles of the inferior pharyngeal constrictor. *Cricopharyngeus and Sternocleidomastoid* - The **sternocleidomastoid** is a muscle of the neck responsible for movement, not a component of the pharyngeal wall architecture. - It is located deep to the platysma and has no role in the formation of pharyngeal diverticula. *Thyropharyngeus and Inferior constrictor* - The **thyropharyngeus** is actually a part of the **inferior constrictor muscle**, making this description redundant rather than specifying the true site of herniation. - The correct anatomical defect specifically requires the boundary between the oblique and transverse fibers of the pharynx. *Inferior constrictor and Sternocleidomastoid* - The **inferior pharyngeal constrictor** surrounds the defect, but the sternocleidomastoid is entirely unrelated to the specific site of the **Killian's dehiscence**. - This option incorrectly pairs an internal pharyngeal structure with a superficial neck muscle.

Q: Lingual tonsils arise from which of the following processes?

Developmental anomalies. **Explanation:** The **lingual tonsils** are part of the **Waldeyer’s ring**, located on the posterior third of the tongue. While they are normal anatomical structures, their clinical presentation as symptomatic masses or significant enlargements is primarily attributed to **developmental anomalies** during embryogenesis. They arise from the endoderm of the second pharyngeal pouch. In the context of "ectopic" or "accessory" lymphoid tissue appearing in unusual locations or presenting as congenital masses, they are classified under developmental variations. **Analysis of Options:** * **A. Developmental anomalies (Correct):** The formation and distribution of lymphoid tissue in the base of the tongue are determined during fetal development. Variations in the size and extent of this tissue are developmental in nature. * **B. Carcinomatous transformation:** While Squamous Cell Carcinoma (SCC) can occur in the lingual tonsils, it is a malignant change, not the *origin* of the tissue itself. * **C. Hyperplasia:** Compensatory hyperplasia (e.g., after palatine tonsillectomy) can make lingual tonsils more prominent, but the *existence* of the tissue is developmental. * **D. Repeated trauma:** Chronic irritation may cause inflammation (tonsillitis), but it does not give rise to the tonsillar tissue. **High-Yield Clinical Pearls for NEET-PG:** * **Waldeyer’s Ring:** Comprises the Nasopharyngeal (adenoid), Tubal, Palatine, and Lingual tonsils. * **Lingual Tonsil Hypertrophy:** Can cause "Lump in the throat" sensation (Globus pharyngeus) and is a known cause of difficult intubation (obscuring the epiglottis). * **Symptom:** Large lingual tonsils can lead to **Obstructive Sleep Apnea (OSA)** in adults. * **Nerve Supply:** The posterior 1/3rd of the tongue (including lingual tonsils) is supplied by the **Glossopharyngeal nerve (CN IX)**.

Q: Which of the following structures does not form the hypopharynx?

Epiglottis. **Explanation:** The pharynx is divided into three parts: Nasopharynx, Oropharynx, and Hypopharynx (Laryngopharynx). The **Hypopharynx** extends from the level of the hyoid bone above to the lower border of the cricoid cartilage (C6 level) below. **1. Why Epiglottis is the Correct Answer:** The **Epiglottis** is a component of the **Larynx**, not the pharynx. Specifically, its lingual surface is associated with the oropharynx (vallecula), but the structure itself is the superior-most cartilage of the laryngeal framework. Therefore, it does not form a part of the hypopharyngeal walls. **2. Analysis of Incorrect Options (Subdivisions of Hypopharynx):** The hypopharynx is anatomically divided into three distinct regions: * **Pyriform Fossa (Sinus):** These are two deep recesses situated on either side of the laryngeal inlet. It is the most common site for malignancies in the hypopharynx. * **Post-cricoid Region:** This area lies behind the cricoid cartilage, extending from the level of the arytenoid cartilages to the lower border of the cricoid. It is a frequent site for carcinoma in females with Plummer-Vinson syndrome. * **Posterior Pharyngeal Wall:** This extends from the level of the hyoid bone to the level of the cricoarytenoid joint. **Clinical Pearls for NEET-PG:** * **Most common site of Hypopharyngeal Cancer:** Pyriform Fossa. * **Killian’s Dehiscence:** A weak area between the thyropharyngeus and cricopharyngeus muscles (parts of the inferior constrictor) located in the hypopharynx; it is the site for **Zenker’s Diverticulum**. * **Nerve Supply:** The internal laryngeal nerve (sensory) lies submucosally in the pyriform fossa, making it a site for local anesthesia blocks.

Q: Dohlman's operation is related to which of the following conditions?

Zenker's diverticulum. **Explanation:** **Dohlman’s operation** is a minimally invasive endoscopic procedure specifically used for the treatment of **Zenker’s diverticulum** (a pulsion diverticulum occurring through Killian’s dehiscence). The procedure involves using a specialized double-lipped speculum to visualize the "party wall" or the septum between the esophagus and the diverticulum. The core principle is the **endoscopic division of the cricopharyngeal sphincter** (cricopharyngeal myotomy) along with the partition wall using diathermy or a CO2 laser. This converts the diverticulum and the esophagus into a single cavity, preventing food entrapment and relieving dysphagia. **Analysis of Incorrect Options:** * **A. Carcinoma of the esophagus:** Managed via esophagectomy (e.g., McKeown or Ivor Lewis procedure) or radiotherapy, depending on the stage. * **B. Carcinoma of the larynx:** Treated with total or partial laryngectomy, radiotherapy, or chemotherapy. * **C. Nasopharyngeal carcinoma:** Primarily treated with radiotherapy (it is highly radiosensitive); surgery is generally reserved for salvage cases. **Clinical Pearls for NEET-PG:** * **Killian’s Dehiscence:** The site of Zenker’s diverticulum, located between the thyropharyngeus and cricopharyngeus muscles (inferior constrictor). * **Boyce’s Sign:** A gurgling sound produced on external pressure over the neck in Zenker’s diverticulum. * **Investigation of Choice:** Barium swallow (shows a "spill-over" appearance). * **Modern Alternative:** Endoscopic Stapling (Stapled Diverticulotomy) has largely replaced diathermy Dohlman’s due to lower risk of mediastinitis and faster recovery.

Q: A 10-year-old boy presents with nasal obstruction and intermittent profuse epistaxis. He has a firm pinkish mass in the nasopharynx. Which of the following investigations is NOT indicated in this case?

Biopsy. **Explanation:** The clinical presentation of a **10-year-old boy** with **nasal obstruction** and **intermittent profuse epistaxis**, coupled with a **firm pinkish mass** in the nasopharynx, is a classic textbook description of **Juvenile Nasopharyngeal Angiofibroma (JNA)**. **Why Biopsy is NOT indicated:** JNA is a benign but locally aggressive, **highly vascular tumor**. Performing a biopsy in an outpatient or uncontrolled setting is **strictly contraindicated** because it can trigger torrential, life-threatening hemorrhage. The diagnosis is primarily clinical and radiological; a biopsy is only considered if the diagnosis is in doubt, and even then, only in an operating room under general anesthesia with preparations for blood transfusion. **Analysis of other options:** * **X-ray base of skull:** Historically used to look for the **"Holman-Miller Sign"** (antral sign), which is the anterior bowing of the posterior wall of the maxillary sinus. * **Carotid angiography:** Essential to identify the feeding vessel (most commonly the **Internal Maxillary Artery**) and is often performed simultaneously with **pre-operative embolization** to reduce intraoperative bleeding. * **CT scan:** The investigation of choice to assess the extent of the tumor and bone involvement (e.g., erosion of the pterygoid plates). **High-Yield Clinical Pearls for NEET-PG:** * **Demographics:** Occurs almost exclusively in **adolescent males** (testosterone-dependent). * **Origin:** Usually the sphenopalatine foramen. * **Pathognomonic Sign:** Holman-Miller Sign on imaging. * **Gold Standard Investigation:** Contrast-enhanced CT (CECT) and MRI. * **Treatment of Choice:** Surgical excision (usually via endoscopic or transpalatal approaches) following embolization.

Q: The most dangerous type of spread of infection from an apical abscess is to which of the following spaces?

Parapharyngeal space. **Explanation:** The **parapharyngeal space** is considered the most dangerous site for the spread of odontogenic infections (like an apical abscess) because it acts as the "central hub" for deep neck spaces. It is shaped like an inverted pyramid, extending from the skull base to the hyoid bone. Its danger lies in its anatomical connections: it communicates directly with the **retropharyngeal space**, which provides a "highway" to the **superior mediastinum** (leading to life-threatening mediastinitis). Furthermore, it contains the carotid sheath; infection here can lead to internal jugular vein thrombosis (Lemierre’s syndrome) or carotid artery erosion. **Analysis of Incorrect Options:** * **Infratemporal fossa:** While infection can spread here from maxillary molars, it is generally contained and less likely to cause immediate systemic or life-threatening airway/cardiac complications compared to the parapharyngeal space. * **Pterygoid space:** This is a sub-compartment of the masticator space. Infection here causes severe trismus but remains localized to the jaw area. * **Submandibular space:** This is the most *common* site for spread (e.g., Ludwig’s Angina), but it is not considered the most *dangerous* in terms of rapid vertical spread to the thorax. **Clinical Pearls for NEET-PG:** * **Ludwig’s Angina:** A bilateral cellulitis of the submandibular, sublingual, and submental spaces, usually originating from the 2nd or 3rd mandibular molars. * **Danger Space:** Located between the alar and prevertebral fascia; it is the primary route for the spread of infection from the neck to the **posterior mediastinum**. * **Trismus:** If present with a sore throat, always suspect a parapharyngeal or peritonsillar abscess.

Q: A 13-year-old boy presents with cheek swelling and recurrent epistaxis. What is the most likely cause?

Angiofibroma. **Explanation:** The clinical presentation of a **13-year-old boy** with **recurrent epistaxis** and **cheek swelling** is a classic "spotter" for **Juvenile Nasopharyngeal Angiofibroma (JNA)**. **1. Why Angiofibroma is correct:** JNA is a benign but locally aggressive, highly vascular tumor that occurs almost exclusively in **adolescent males** (testosterone-dependent). * **Epistaxis:** The most common symptom is profuse, painless, recurrent epistaxis due to the tumor's extreme vascularity. * **Cheek Swelling:** As the tumor grows, it typically expands from the sphenopalatine foramen into the **pterygopalatine fossa** and then laterally into the **infratemporal fossa**, leading to the characteristic "frog-face" deformity or cheek swelling. **2. Why other options are incorrect:** * **Carcinoma of the nasopharynx:** While it can cause epistaxis and nasal obstruction, it is rare in young children and more commonly presents with cervical lymphadenopathy and serous otitis media. * **Rhabdomyosarcoma:** This is the most common soft tissue sarcoma in children. While it can occur in the head and neck, it usually presents as a rapidly enlarging, painful mass rather than the classic pattern of recurrent, profuse epistaxis seen in JNA. **3. High-Yield Clinical Pearls for NEET-PG:** * **Origin:** Sphenopalatine foramen (near the posterior end of the middle turbinate). * **Holman-Miller Sign (Antral Sign):** Anterior 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 strictly contraindicated** due to the risk of torrential hemorrhage. * **Treatment:** Surgical excision (Pre-operative embolization is often done to reduce blood loss).

Q: A 40-year-old woman developed high fever and pain after a lower third molar extraction due to dental caries. On examination, her tonsil was displaced medially, and there was swelling in the upper one-third of the sternocleidomastoid muscle. What is the most likely diagnosis?

Parapharyngeal abscess. ### Explanation The clinical presentation points towards a **Parapharyngeal Abscess**. The parapharyngeal space is an inverted pyramid-shaped space lateral to the pharynx. **1. Why Parapharyngeal Abscess is correct:** * **Etiology:** Dental infections (especially lower molars) are a common source of infection spreading to this space. * **Clinical Features:** The "inverted pyramid" shape means that an abscess here pushes the lateral pharyngeal wall and **tonsil medially**. * **External Swelling:** Swelling typically appears at the angle of the mandible or along the **upper one-third of the sternocleidomastoid muscle**, as seen in this patient. Trismus (due to irritation of the medial pterygoid muscle) is also a classic feature. **2. Why other options are incorrect:** * **Hematoma:** While possible after trauma/surgery, it would not typically present with high fever or the specific anatomical displacement described without secondary infection. * **Retropharyngeal Abscess:** This occurs in the space behind the pharynx. It presents with midline or paramedian posterior pharyngeal wall bulging and respiratory distress/dysphagia, but **not** medial displacement of the tonsil or swelling over the sternocleidomastoid. * **Ludwig’s Angina:** This is a cellulitis of the submandibular, sublingual, and submental spaces. It presents with "woody" hard swelling of the floor of the mouth and **tongue elevation**, not tonsillar displacement. **Clinical Pearls for NEET-PG:** * **Complications:** The most feared complication of a parapharyngeal abscess is **internal jugular vein thrombosis** (Lemierre’s syndrome) or **erosion of the internal carotid artery**. * **Radiology:** Contrast-enhanced CT (CECT) is the gold standard for diagnosis. * **Anatomy:** The space is divided into pre-styloid and post-styloid compartments by the styloid process. Medial tonsillar displacement is more common in **pre-styloid** involvement.

Question 1

A patient presents with an ulcer on the posterior pharyngeal wall, as shown in the image. This lesion most likely originates from which structure?

Accepted Answer

Pharyngeal mucosa

Answer

Minor salivary glands

Answer

Subepithelial region

Answer

Lymphoid tissue

Question 2

A child presents with a history of accidental coin ingestion. The X -ray is as shown in the image. The coin is most likely lodged in which site?

Accepted Answer

Esophagus

Answer

Larynx

Answer

Trachea

Answer

Hypopharynx

Question 3

A patient presents with difficulty swallowing and regurgitation of undigested food with foul- smelling breath. The lateral neck X-ray is as shown. The diverticulum occurs due to herniation between which muscles?

Accepted Answer

Cricopharyngeus and Thyropharyngeus

Answer

Cricopharyngeus and Sternocleidomastoid

Answer

Thyropharyngeus and Inferior constrictor

Answer

Inferior constrictor and Sternocleidomastoid

Question 4

Lingual tonsils arise from which of the following processes?

Accepted Answer

Developmental anomalies

Answer

Carcinomatous transformation

Answer

Hyperplasia

Answer

Repeated trauma in the area

Question 5

Which of the following structures does not form the hypopharynx?

Accepted Answer

Epiglottis

Answer

Pyriform fossa

Answer

Posterior pharyngeal wall

Answer

Post cricoid region

Question 6

Dohlman's operation is related to which of the following conditions?

Accepted Answer

Zenker's diverticulum

Answer

Carcinoma of the esophagus

Answer

Carcinoma of the larynx

Answer

Nasopharyngeal carcinoma

Question 7

A 10-year-old boy presents with nasal obstruction and intermittent profuse epistaxis. He has a firm pinkish mass in the nasopharynx. Which of the following investigations is NOT indicated in this case?

Accepted Answer

Biopsy

Answer

X-ray base of skull

Answer

Carotid angiography

Answer

CT scan

Question 8

The most dangerous type of spread of infection from an apical abscess is to which of the following spaces?

Accepted Answer

Parapharyngeal space

Answer

Infratemporal fossa

Answer

Pterygoid

Answer

Submandibular space

Question 9

A 13-year-old boy presents with cheek swelling and recurrent epistaxis. What is the most likely cause?

Accepted Answer

Angiofibroma

Answer

Carcinoma of the nasopharynx

Answer

Rhabdomyosarcoma

Answer

None of the above

Question 10

A 40-year-old woman developed high fever and pain after a lower third molar extraction due to dental caries. On examination, her tonsil was displaced medially, and there was swelling in the upper one-third of the sternocleidomastoid muscle. What is the most likely diagnosis?

Accepted Answer

Parapharyngeal abscess

Answer

Hematoma

Answer

Retropharyngeal abscess

Answer

Ludwig's angina

Diseases of the Pharynx — MCQs

Diseases of the Pharynx — MCQs

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