ENT Oncology Practice Questions

Q: Mobility of teeth in carcinoma of the maxillary sinus is due to involvement by the tumor of which anatomical structure?

Floor of the sinus. **Explanation:** The clinical presentation of Maxillary Sinus Carcinoma depends on which wall of the sinus is breached by the tumor. The **floor of the maxillary sinus** is formed by the alveolar process of the maxilla and the hard palate. The roots of the upper molar and premolar teeth lie in close proximity to, or sometimes penetrate, this floor. When a tumor involves the **floor of the sinus**, it invades the alveolar bone and the periodontal ligaments. This destruction of the supporting dental architecture leads to **loosening/mobility of teeth**, dental pain, or unexplained swelling in the gingivolabial sulcus or palate. **Analysis of Incorrect Options:** * **Anterior Wall:** Involvement leads to swelling of the cheek and invasion of the facial soft tissues (infraorbital nerve involvement causes anesthesia of the cheek). * **Posterior Wall:** Involvement leads to invasion of the pterygopalatine fossa and infratemporal fossa, resulting in trismus (due to pterygoid muscle involvement) and referred earache. * **Roof:** The roof forms the floor of the orbit. Involvement leads to proptosis, diplopia, or displacement of the eyeball. **Clinical Pearls for NEET-PG:** * **Ohngren’s Line:** An imaginary line connecting the medial canthus to the angle of the mandible. Tumors **posterosuperior** to this line have a poorer prognosis than those located anteroinferiorly. * **Lederman’s Classification:** Uses two horizontal lines (passing through the floor of the orbit and the floor of the antrum) to divide the area into suprastructure, mesostructure, and infrastructure. * **Most common histology:** Squamous Cell Carcinoma (approx. 80%). * **Early Sign:** Most maxillary tumors are clinically silent; persistent unilateral "sinusitis" or blood-stained nasal discharge in an elderly patient should be investigated for malignancy.

Q: Which carcinoma most commonly metastasizes to cervical lymph nodes?

Posterior tongue. **Explanation:** The frequency of cervical lymph node metastasis in head and neck cancers is primarily determined by the **richness of the lymphatic network** and the **mobility** of the primary site. **Why Posterior Tongue is Correct:** The posterior third of the tongue (base of tongue) is part of the oropharynx. It has an extremely rich, decussating (crossing) lymphatic drainage system. Approximately **70-80% of patients** with carcinoma of the posterior tongue present with clinically positive cervical nodes at the time of diagnosis, often bilateral. In contrast, the anterior two-thirds (oral tongue) has a lower rate (approx. 30-40%). **Analysis of Incorrect Options:** * **Maxillary Sinus:** These tumors are often "clinically silent" regarding nodes. Lymphatics from the antrum are sparse and primarily drain to the retropharyngeal nodes first, rather than the cervical chain. * **Cheek (Buccal Mucosa):** While it does metastasize to Level I and II nodes, the rate is significantly lower than the tongue, usually occurring in later stages. * **Hard Palate:** This area has a very sparse lymphatic network and the mucoperiosteum is tightly bound to bone, making lymphatic spread relatively uncommon and late. **NEET-PG High-Yield Pearls:** * **Most common site for distant metastasis in ENT:** Nasopharynx (due to rich lymphatics). * **N0 Neck:** Even if nodes are not palpable, posterior tongue and pyriform sinus cancers often require elective neck dissection/irradiation due to high rates of "occult" metastasis. * **Rouviere’s Node:** The most superior node of the lateral retropharyngeal group, often involved in Nasopharyngeal Carcinoma. * **Order of Metastatic Frequency:** Hypopharynx > Tongue Base > Tonsil > Oral Tongue.

Q: Which of the following is NOT a cause of oropharyngeal carcinoma?

Occupational exposure to hydrochloric acid. **Explanation:** Oropharyngeal carcinoma primarily arises from the mucosal lining of the soft palate, base of tongue, tonsils, and posterior pharyngeal wall. Understanding its etiology is crucial for NEET-PG. **Why Option A is correct:** **Occupational exposure to hydrochloric acid (HCl)** is associated with dental erosion and irritation of the upper respiratory tract, but it is **not** a recognized risk factor for oropharyngeal carcinoma. In contrast, exposure to wood dust (nasal adenocarcinoma) or nickel/chromium (sinonasal squamous cell carcinoma) are classic occupational associations in ENT oncology. **Why the other options are incorrect:** * **Smoking (Option B):** Tobacco contains potent carcinogens (like nitrosamines) that cause field cancerization. It remains a leading cause of oropharyngeal and laryngeal cancers. * **Human Papilloma Virus (Option C):** HPV (specifically **Type 16**) is now a major driver of oropharyngeal cancer, particularly in the tonsils and base of tongue. These patients are typically younger, non-smokers, and have a better prognosis than tobacco-related cases. * **Plummer-Vinson Syndrome (Option D):** Also known as Paterson-Brown-Kelly syndrome, it is characterized by iron-deficiency anemia, glossitis, and esophageal webs. It is a well-known premalignant condition for **post-cricoid carcinoma** and oropharyngeal squamous cell carcinoma. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Palatine tonsil. * **Most common histology:** Squamous Cell Carcinoma (SCC). * **HPV Status:** p16 protein expression is used as a surrogate marker for HPV-positive status in immunohistochemistry. * **Eagle’s Syndrome:** Often a differential diagnosis for oropharyngeal pain (elongated styloid process).

Q: Which of the following is the most radiosensitive tumor?

Carcinoma of the nasopharynx. **Explanation:** The correct answer is **Carcinoma of the nasopharynx (NPC)**. The radiosensitivity of a tumor is largely determined by its histological type and degree of differentiation. Nasopharyngeal carcinoma, particularly the **WHO Type 3 (Undifferentiated/Lymphoepithelioma)**, is highly cellular with a high mitotic index. In oncology, the "Law of Bergonié and Tribondeau" states that cells that are rapidly dividing and poorly differentiated are more sensitive to ionizing radiation. Because NPC is often undifferentiated and associated with Epstein-Barr Virus (EBV), it responds exquisitely well to radiotherapy, which is the primary treatment modality for all stages of the disease. **Analysis of Incorrect Options:** * **Supraglottic and Subglottic Carcinomas:** These are typically **Squamous Cell Carcinomas (SCC)**. While they are radioresponsive, they are generally well-to-moderately differentiated compared to NPC, making them less radiosensitive. * **Carcinoma of the Glottis:** Early-stage glottic cancer is often treated with radiotherapy with excellent results due to its location, but the intrinsic biological sensitivity of the keratinizing SCC found here is lower than that of the undifferentiated cells in the nasopharynx. **High-Yield Clinical Pearls for NEET-PG:** * **Treatment of Choice:** Radiotherapy (RT) is the primary treatment for NPC. For advanced stages, Concurrent Chemo-radiotherapy (CCRT) is used. * **Fossa of Rosenmüller:** The most common site of origin for NPC. * **Trotter’s Triad:** Conductive deafness, Ipsilateral temporoparietal neuralgia (CN V), and Palatal paralysis (CN X)—highly suggestive of NPC. * **EBV Association:** Type 2 and Type 3 NPC have a strong correlation with EBV titers (Anti-VCA antibodies).

Q: What is the cause of unilateral secretory otitis media in an adult?

Nasopharyngeal carcinoma. **Explanation:** In an adult, **unilateral secretory otitis media (SOM)**—also known as Otitis Media with Effusion (OME)—is considered **nasopharyngeal carcinoma (NPC)** until proven otherwise. **Why Nasopharyngeal Carcinoma is correct:** The nasopharynx is the site of the opening of the **Eustachian tube (ET)**, specifically within the Fossa of Rosenmüller. A tumor in this region can mechanically obstruct the ET orifice. This obstruction leads to negative middle ear pressure, followed by the transudation of fluid into the middle ear cleft, resulting in unilateral hearing loss and effusion. In adults, this presentation is a classic "red flag" for malignancy. **Why other options are incorrect:** * **A. CSOM:** This involves a chronic infection with a perforated tympanic membrane and active or inactive discharge, rather than a sterile collection of fluid behind an intact drum. * **C. Mastoiditis:** This is a complication of acute otitis media characterized by retroauricular pain, fever, and swelling; it is an inflammatory process rather than a primary cause of chronic secretory effusion. * **D. Foreign body:** While it may cause conductive hearing loss or external otitis, it does not affect the Eustachian tube function or lead to middle ear effusion. **High-Yield Clinical Pearls for NEET-PG:** * **Trotter’s Triad for NPC:** 1. Conductive hearing loss (due to SOM), 2. Ipsilateral facial/temporoparietal pain (Trigeminal nerve involvement), 3. Palatal paralysis (Vagus nerve involvement). * **Diagnostic Gold Standard:** Endoscopic examination of the nasopharynx and biopsy. * **Risk Factor:** Strong association with **Epstein-Barr Virus (EBV)**. * **Rule:** Any adult with persistent unilateral ear fullness must undergo a fiberoptic nasopharyngoscopy to rule out NPC.

Q: Human papillomavirus (HPV) infection is most strongly associated with which of the following head and neck cancers?

Oropharyngeal carcinoma. ***Oropharyngeal carcinoma***- HPV (high-risk types, especially **HPV-16**) is the primary etiologic agent for a distinct and increasing subtype of **oropharyngeal squamous cell carcinoma (OPSCC)**, mainly affecting the tonsils and base of the tongue.- HPV-positive OPCs are biologically distinct from those caused by tobacco and alcohol, typically present in younger patients, and have a significantly improved prognosis.*Nasopharyngeal carcinoma*- The strongest viral association with nasopharyngeal carcinoma (NPC) is the **Epstein-Barr virus (EBV)**, not HPV.- NPC is also strongly linked to dietary factors (salted fish) and genetic predisposition, often showing a different geographic distribution.*Hypopharyngeal carcinoma*- This cancer is predominantly caused by heavy use of tobacco and alcohol, placing it firmly in the category of traditional **squamous cell carcinoma** risk factors.- HPV positivity in hypopharyngeal cancers is rare and not considered a major causative factor.*Laryngeal carcinoma*- Laryngeal squamous cell carcinoma is overwhelmingly associated with **tobacco smoking** and, secondarily, alcohol use.- While HPV can cause laryngeal papillomatosis, its definitive causal role in invasive laryngeal *carcinoma* is weak and inconsistent compared to its strong association with the oropharynx.

Q: A 49-year-old female from Nagaland presented with right-sided hearing loss and tinnitus. On examination, dull tympanic membrane with lymph nodes in the posterior triangle of the neck was seen. Which of the following is the management for the condition?

Radiotherapy. ***Correct: Radiotherapy*** - This clinical presentation is **classic for nasopharyngeal carcinoma (NPC)**: middle-aged patient from **Nagaland** (endemic region for NPC in Northeast India), unilateral serous otitis media (dull TM, hearing loss, tinnitus from Eustachian tube obstruction), and **posterior triangle lymphadenopathy** (most characteristic feature) - **NPC is highly radiosensitive** and radiotherapy is the primary treatment modality for all stages - Concurrent chemoradiotherapy is the standard for locally advanced disease - The geographic origin (Nagaland) is a critical clue as NPC has high incidence in Northeast India, Southeast Asia, and Southern China (associated with EBV infection and dietary factors) *Incorrect: Grommet insertion + Steroids* - Treats only the **secondary middle ear effusion**, not the underlying malignancy - Would delay definitive diagnosis and treatment of NPC - May temporarily relieve hearing symptoms but doesn't address the cancer *Incorrect: Steroids* - No role in the treatment of nasopharyngeal carcinoma - May mask symptoms and delay diagnosis - Does not address the underlying malignancy or lymphadenopathy *Incorrect: Grommet insertion* - Only addresses the **symptomatic serous otitis media**, not the primary pathology - The presence of posterior triangle lymph nodes makes malignancy the priority - Any adult with unilateral serous otitis media + cervical lymphadenopathy requires nasopharyngoscopy and biopsy to rule out NPC before symptomatic treatment

Q: A patient presented with a 3.5-cm size lymph node enlargement, which was hard and present in the submandibular region. Examination of the head and neck did not yield any lesion. Which of the following investigations should follow?

Triple endoscopy. ***Triple endoscopy*** - A **3.5 cm, hard, submandibular lymph node** without an obvious primary lesion suggests metastatic carcinoma, requiring a thorough search for the primary. - **Triple endoscopy** (laryngoscopy, esophagoscopy, and bronchoscopy) allows direct visualization and biopsy of mucosal surfaces in the upper aerodigestive tract, which is a common site for primary tumors metastasizing to the neck. *Chest X-ray* - While a Chest X-ray can detect **lung lesions** or mediastinal lymphadenopathy, it may not adequately identify a primary tumor in the upper aerodigestive tract. - It would be a useful adjunct later but does not provide the comprehensive mucosal surface evaluation needed to find a hidden primary. *Laryngoscopy* - **Laryngoscopy** is part of the triple endoscopy procedure but by itself is insufficient as it only examines the larynx and hypopharynx. - It would miss potential primary lesions in the nasopharynx, oral cavity, or esophagus. *Supravital oral mucosa staining* - **Supravital staining** (e.g., toluidine blue) is used to identify dysplastic or early malignant lesions on the oral mucosa. - While useful for oral cavity screening, it does not evaluate other potential primary sites in the pharynx, larynx, esophagus, or nasopharynx, which could be the source of the metastatic node.

Question 1

Mobility of teeth in carcinoma of the maxillary sinus is due to involvement by the tumor of which anatomical structure?

Accepted Answer

Floor of the sinus

Answer

Anterior wall of the sinus

Answer

Posterior wall of the sinus

Answer

Roof of the sinus

Question 2

Which carcinoma most commonly metastasizes to cervical lymph nodes?

Accepted Answer

Posterior tongue

Answer

Maxillary sinus

Answer

Cheek

Answer

Hard palate

Question 3

Which of the following is NOT a cause of oropharyngeal carcinoma?

Accepted Answer

Occupational exposure to hydrochloric acid

Answer

Smoking

Answer

Human Papilloma Virus infection

Answer

Plummer-Vinson syndrome

Question 4

Which of the following is the most radiosensitive tumor?

Accepted Answer

Carcinoma of the nasopharynx

Answer

Supraglottic carcinoma

Answer

Carcinoma of the glottis

Answer

Subglottic carcinoma

Question 5

Second primary malignancy of the head and neck is commonly associated with which of the following?

Accepted Answer

Oral cavity

Answer

Hypopharynx

Answer

Larynx

Answer

Paranasal sinuses

Question 6

What is the cause of unilateral secretory otitis media in an adult?

Accepted Answer

Nasopharyngeal carcinoma

Answer

Chronic suppurative otitis media (CSOM)

Answer

Mastoiditis

Answer

Foreign body of the external ear

Question 7

Human papillomavirus (HPV) infection is most strongly associated with which of the following head and neck cancers?

Accepted Answer

Oropharyngeal carcinoma

Answer

Laryngeal carcinoma

Answer

Hypopharyngeal carcinoma

Answer

Nasopharyngeal carcinoma

Question 8

A 49-year-old female from Nagaland presented with right-sided hearing loss and tinnitus. On examination, dull tympanic membrane with lymph nodes in the posterior triangle of the neck was seen. Which of the following is the management for the condition?

Accepted Answer

Radiotherapy

Answer

Grommet insertion + Steroids

Answer

Steroids

Answer

Grommet insertion

Question 9

Which of the following statements regarding Juvenile Nasopharyngeal Angiofibroma (JNA) is NOT typically correct or recommended?

Accepted Answer

Biopsy under anesthesia to diagnose

Answer

Recurrent epistaxis

Answer

Unilateral nasal obstruction

Answer

Exclusively to adolescent boys

Question 10

A patient presented with a 3.5-cm size lymph node enlargement, which was hard and present in the submandibular region. Examination of the head and neck did not yield any lesion. Which of the following investigations should follow?

Accepted Answer

Triple endoscopy

Answer

Chest X-ray

Answer

Laryngoscopy

Answer

Supravital oral mucosa staining

ENT Oncology — MCQs

ENT Oncology — MCQs

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