Rhinology — MCQs

Rhinology Indian Medical PG Practice Questions and MCQs

Question 171: The Caldwell-Luc approach primarily opens which sinus?

A. Maxillary sinus (Correct Answer)
B. Frontal sinus
C. Sphenoid sinus
D. Ethmoid sinus

Explanation: The **Caldwell-Luc operation** is a classic surgical procedure designed to access the **maxillary sinus** via the canine fossa. ### Why Maxillary Sinus is Correct: The procedure involves an intraoral incision in the gingivolabial sulcus above the canine and premolar teeth. A window is created in the anterior wall of the maxilla (canine fossa) to gain direct visualization of the sinus. Historically, it was used to remove diseased mucosa and create a permanent drainage pathway through an inferior meatal antrostomy. ### Why Other Options are Incorrect: * **Frontal Sinus:** Accessed via external approaches like the Lynch-Howarth incision or endoscopic sinus surgery (Draf procedures). * **Sphenoid Sinus:** Typically reached via a transnasal or transethmoidal approach, or more commonly today, through an endoscopic endonasal approach. * **Ethmoid Sinus:** Accessed via an external ethmoidectomy (Lynch-Howarth) or endoscopically. While a Caldwell-Luc can provide a route to the ethmoids (transantral ethmoidectomy), its *primary* target is the maxillary sinus. ### High-Yield Clinical Pearls for NEET-PG: * **Indications:** Recurrent/chronic sinusitis (rarely used now due to FESS), removal of foreign bodies (e.g., a root of a tooth), management of Oro-antral fistula, and as a route to the pterygopalatine fossa (Maxillary artery ligation). * **Approach to Maxillary Nerve:** It is the standard approach for the **Denker’s procedure** (extended Caldwell-Luc) to treat tumors like inverted papilloma. * **Complication:** The most common complication is **cheek numbness** or paresthesia due to injury to the **infraorbital nerve**. * **Contraindication:** It is generally avoided in children until the permanent dentition is complete (usually age 12+) to prevent damage to developing tooth buds.

Question 172: Trotter's triad is seen in which of the following conditions?

A. Angiofibroma
B. Nasopharyngeal carcinoma (Correct Answer)
C. Laryngeal carcinoma
D. Growth in fossa of Rosenmuller

Explanation: **Explanation:** **Trotter’s Triad** is a classic clinical diagnostic cluster associated with **Nasopharyngeal Carcinoma (NPC)**, particularly when the tumor originates in or infiltrates the lateral pharyngeal wall. It occurs due to the local infiltration of the tumor into the surrounding structures. The triad consists of: 1. **Conductive Hearing Loss:** Caused by Eustachian tube blockage (at the Fossa of Rosenmüller), leading to otitis media with effusion. 2. **Ipsilateral Temporofacial Neuralgia:** Due to involvement of the Mandibular nerve (V3) as it exits the foramen ovale. 3. **Palatal Paralysis/Immobility:** Resulting from infiltration of the Levator veli palatini muscle. **Analysis of Options:** * **Nasopharyngeal Carcinoma (B):** This is the correct answer. The triad specifically describes the local spread of NPC. * **Angiofibroma (A):** While it occurs in the nasopharynx, it is a benign, highly vascular tumor in adolescent males characterized by epistaxis and nasal obstruction, not this specific neurological triad. * **Laryngeal Carcinoma (C):** Presents with hoarseness, stridor, or dysphagia; it does not involve the Eustachian tube or mandibular nerve. * **Growth in Fossa of Rosenmuller (D):** While NPC often starts here, "Growth" is a non-specific term. Option B is the definitive clinical diagnosis associated with the triad in medical literature. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of NPC:** Fossa of Rosenmüller. * **Etiology:** Strongly associated with **Epstein-Barr Virus (EBV)**. * **Most common presenting symptom:** Cervical lymphadenopathy (often bilateral, Level II/V). * **Treatment of choice:** Radiotherapy (NPC is highly radiosensitive).

Question 173: Which nerve is injured in a Caldwell-Luc operation?

A. Lingual nerve
B. Infraorbital nerve (Correct Answer)
C. Optic nerve
D. Facial nerve

Explanation: **Explanation:** The **Caldwell-Luc operation** is a surgical procedure where the maxillary sinus is accessed via the canine fossa through a sublabial incision. The correct answer is the **infraorbital nerve** because of its critical anatomical proximity to the surgical site. 1. **Why Infraorbital Nerve is correct:** The infraorbital nerve (a branch of the maxillary nerve, CN V2) exits through the infraorbital foramen, which is located just superior to the canine fossa. During the elevation of the periosteum or while creating the bony window in the anterior wall of the maxilla, this nerve is highly susceptible to traction, compression, or direct injury. This typically results in postoperative numbness or paresthesia of the cheek, upper lip, and upper teeth. 2. **Why other options are incorrect:** * **Lingual nerve:** This is a branch of the mandibular nerve (CN V3) supplying the tongue; it is located in the floor of the mouth and is unrelated to the maxillary sinus. * **Optic nerve:** While the optic nerve is near the roof of the ethmoid and sphenoid sinuses, it is far superior and posterior to the anterior maxillary wall where the Caldwell-Luc procedure is performed. * **Facial nerve:** This nerve exits the stylomastoid foramen and supplies the muscles of facial expression. While its branches are in the face, the deep sublabial approach specifically endangers the sensory infraorbital nerve rather than the motor facial nerve. **Clinical Pearls for NEET-PG:** * **Indications:** Chronic maxillary sinusitis (not responsive to FESS), removal of foreign bodies/antral choanal polyps, and closure of oro-antral fistulae. * **Commonest Complication:** Cheek swelling and numbness (due to infraorbital nerve involvement). * **Anatomical Landmark:** The incision is made in the gingivolabial sulcus above the roots of the premolar teeth to avoid the **lacrimal duct** and the **infraorbital nerve**.

Question 174: 'Hebra' nose is caused by which of the following?

A. Frisch bacillus (Correct Answer)
B. Staphaureus
C. Pseudomonas
D. C.diphtheriae

Explanation: **Explanation:** The correct answer is **Frisch bacillus** (Option A). **Understanding the Concept:** 'Hebra nose' is a clinical descriptive term for the external nasal deformity seen in **Rhinoscleroma**, a chronic granulomatous disease of the upper respiratory tract. It is caused by *Klebsiella pneumoniae rhinoscleromatis*, also known as the **Frisch bacillus**. In the second stage of the disease (the proliferative/granulomatous stage), the nasal tissues undergo painless, woody-hard swelling. This leads to a characteristic broadening of the nasal bridge and thickening of the external nose, resembling a "tapir-like" appearance or **Hebra nose**. **Analysis of Incorrect Options:** * **B. Staph. aureus:** Commonly causes acute infections like furunculosis or vestibulitis, leading to localized abscesses rather than chronic granulomatous deformity. * **C. Pseudomonas:** Typically associated with chronic otitis media or malignant otitis externa; it does not cause granulomatous nasal destruction. * **D. C. diphtheriae:** Causes nasal diphtheria characterized by a greyish-white pseudomembrane and serosanguinous discharge, not chronic structural thickening. **High-Yield Clinical Pearls for NEET-PG:** * **Pathology:** Look for **Mikulicz cells** (foamy histiocytes containing the bacilli) and **Russell bodies** (eosinophilic hyaline bodies representing degenerated plasma cells). * **Stages:** Catarrhal (atrophic) → Proliferative (granulomatous/Hebra nose) → Cicatricial (scarring/stenosis). * **Treatment:** Long-term antibiotics (Streptomycin and Tetracycline are traditional; Ciprofloxacin is modern choice) often combined with surgical debridement. * **Biopsy:** This is the definitive diagnostic tool to identify the characteristic histopathology.

Question 175: What anatomical structure is referred to as the Antrum of Highmore?

A. Maxillary (Correct Answer)
B. Ethmoid
C. Sphenoid
D. Frontal

Explanation: **Explanation:** The **Maxillary sinus** is the largest of the paranasal sinuses and is eponymously known as the **Antrum of Highmore**, named after the English surgeon and anatomist Nathaniel Highmore who described it in detail in the 17th century. **Why Maxillary is correct:** The maxillary sinus is a pyramidal-shaped cavity located within the body of the maxilla. It is the first sinus to develop embryologically (appearing around the 3rd month of fetal life). Its clinical significance in ENT arises from its unique drainage pattern; the natural ostium is located superiorly on its medial wall, which defies gravity and necessitates mucociliary clearance to move secretions upward into the middle meatus. **Why other options are incorrect:** * **Ethmoid:** These are a collection of small air cells (anterior and posterior) located between the orbits, not referred to as an "antrum." * **Sphenoid:** Located in the body of the sphenoid bone at the skull base; it is often associated with the pituitary gland but carries no "antrum" eponym. * **Frontal:** Located within the frontal bone; while it can be asymmetrical or absent, it is never referred to as the Antrum of Highmore. **High-Yield Clinical Pearls for NEET-PG:** * **First sinus to develop:** Maxillary (followed by Ethmoid). * **Last sinus to develop:** Frontal (not radiologically visible until age 6-7). * **Drainage:** The maxillary sinus drains into the **hiatus semilunaris** of the middle meatus. * **Oro-antral Fistula:** Due to the close proximity of the sinus floor to the roots of the upper molar and premolar teeth, dental extractions are the most common cause of this complication. * **Malignancy:** The most common site for paranasal sinus malignancy is the maxillary sinus (Squamous Cell Carcinoma).

Question 176: Samter's triad refers to the association of aspirin-sensitive asthma and which of the following conditions?

A. Obesity
B. Urticaria
C. Nasal polyps (Correct Answer)
D. Rhinosinusitis

Explanation: **Explanation:** **Samter’s Triad** (also known as Aspirin-Exacerbated Respiratory Disease or AERD) is a clinical condition characterized by the coexistence of three specific findings: 1. **Aspirin (NSAID) sensitivity** 2. **Bronchial Asthma** 3. **Nasal Polyposis** (typically bilateral and ethmoidal) The underlying pathophysiology involves a metabolic abnormality in the **arachidonic acid pathway**. There is an overproduction of pro-inflammatory cysteinyl **leukotrienes** and a decrease in anti-inflammatory prostaglandins (PGE2). When these patients ingest aspirin or other COX-1 inhibiting NSAIDs, the pathway shifts further toward leukotriene production, triggering severe bronchospasm and rhinorrhea. **Analysis of Options:** * **Option C (Nasal Polyps):** This is the definitive third component of the triad. These polyps are often recurrent and difficult to manage surgically without addressing the underlying inflammatory state. * **Option A (Obesity):** While obesity can worsen asthma control, it is not a component of Samter’s Triad. * **Option B (Urticaria):** Though aspirin sensitivity can sometimes manifest as urticaria, it is not part of the classic Samter’s Triad definition. * **Option D (Rhinosinusitis):** While patients with Samter’s Triad often have chronic rhinosinusitis, the specific diagnostic criteria of the triad require the presence of macroscopic nasal polyps. **High-Yield Clinical Pearls for NEET-PG:** * **Treatment of Choice:** Leukotriene receptor antagonists (e.g., **Montelukast**) are highly effective. * **Aspirin Desensitization:** This is a specialized treatment used to improve symptoms and slow polyp regrowth. * **Widal’s Triad:** This is another name for Samter’s Triad. * **Avoidance:** Patients must avoid all COX-1 inhibitors; however, highly selective COX-2 inhibitors (like Celecoxib) are generally tolerated.

Question 177: What is the treatment of choice for saddle nose?

A. Augmentation Rhinoplasty (Correct Answer)
B. Submucous Resection (SMR)
C. Functional Endoscopic Sinus Surgery (FESS)
D. None of the above

Explanation: **Explanation:** **Saddle nose deformity** is characterized by a depression of the nasal dorsum due to the collapse of the cartilaginous or bony support of the nose. This typically occurs following trauma, over-resection during septal surgery (SMR), or infections like syphilis and leprosy. **1. Why Augmentation Rhinoplasty is the Correct Answer:** The primary goal in treating a saddle nose is to restore the structural height and contour of the nasal bridge. **Augmentation Rhinoplasty** is the gold standard treatment. It involves the use of filling materials—either **autografts** (cartilage from the septum, ear, or rib; or bone from the iliac crest) or **alloplastic materials** (silicon, Medpor)—to "fill" the depression and reconstruct the nasal profile. **2. Why Other Options are Incorrect:** * **Submucous Resection (SMR):** This is a procedure to correct a deviated nasal septum by removing the obstructive part of the septal cartilage. In fact, an over-aggressive SMR is a common *cause* of saddle nose deformity because it weakens the dorsal support. * **Functional Endoscopic Sinus Surgery (FESS):** This is a surgical treatment for chronic rhinosinusitis and nasal polyposis. It focuses on the paranasal sinuses and does not address the external nasal framework. **Clinical Pearls for NEET-PG:** * **Most common cause:** Trauma is the leading cause; however, if the question mentions "leprosy" or "syphilis," think of saddle nose. * **Preferred Graft:** Autologous cartilage (especially **Costal/Rib cartilage**) is preferred for major augmentations due to its low rejection rate. * **Supratip Depression:** If only the cartilaginous part is involved, it is a "minor" saddle; if the bony bridge is also involved, it is a "major" saddle deformity.

Question 178: All of the following are true about antrochoanal polyps, EXCEPT:

A. Unilateral and single
B. Grows backwards to the choana
C. Avulsion is the treatment of choice (Correct Answer)
D. Common in children

Explanation: ### Explanation **Antrochoanal Polyps (Kilian’s Polyp)** are solitary, benign growths that arise from the mucosa of the maxillary sinus, exit through the accessory ostium, and extend into the choana and nasopharynx. **Why Option C is the correct answer (The Exception):** Historically, simple avulsion (polypectomy) was performed; however, it is **not** the treatment of choice today because it carries a high recurrence rate (approx. 25%). The polyp originates from the maxillary sinus wall; if the stalk is not completely removed from its point of origin, it will regrow. The current **gold standard treatment is Functional Endoscopic Sinus Surgery (FESS)**, which allows for the complete removal of the polyp along with its base/stalk via the widened maxillary ostium. **Analysis of Incorrect Options:** * **A. Unilateral and single:** Unlike ethmoidal polyps (which are bilateral and multiple), antrochoanal polyps are characteristically unilateral and solitary. * **B. Grows backwards to the choana:** Due to the anatomy of the nasal passage and ciliary action, these polyps expand posteriorly toward the choana and can even hang into the oropharynx. * **D. Common in children:** While ethmoidal polyps are common in adults with allergies, antrochoanal polyps are the most common nasal polyps seen in children and young adults. **High-Yield Clinical Pearls for NEET-PG:** * **Origin:** Most commonly from the **posterior wall/floor of the maxillary sinus**. * **Components:** It has three parts—Antral, Nasal, and Choanal. * **Radiology:** On X-ray (Waters' view), it shows opacification of the involved maxillary sinus. On CT, it shows a "dumbbell-shaped" mass extending from the sinus to the nasopharynx. * **Differential Diagnosis:** In a young male with a mass in the nasopharynx, always differentiate from **Juvenile Nasopharyngeal Angiofibroma (JNA)** (which is highly vascular and causes epistaxis).

Question 179: Kiesselbach's plexus is present at?

A. Medial wall of the nasopharynx
B. Lateral wall of the nasal cavity
C. Anteroinferior part of the nasal septum (Correct Answer)
D. Posterior part of the nasal cavity

Explanation: **Explanation:** Kiesselbach's plexus (also known as **Little’s area**) is a highly vascularized region located in the **anteroinferior part of the nasal septum**. This area is the most common site for epistaxis (nosebleeds), accounting for approximately 90% of cases. **Why Option C is correct:** The plexus is formed by the anastomosis of four (sometimes five) major arteries that supply the nasal cavity: 1. **Sphenopalatine artery** (branch of Maxillary artery) 2. **Greater palatine artery** (branch of Maxillary artery) 3. **Superior labial artery** (branch of Facial artery) 4. **Anterior ethmoidal artery** (branch of Ophthalmic artery) *Note: Some texts also include the Posterior ethmoidal artery.* **Why other options are incorrect:** * **Option A:** The medial wall of the nasopharynx contains the pharyngeal tonsils (adenoids) and the opening of the Eustachian tube, but not Kiesselbach's plexus. * **Option B:** The lateral wall of the nasal cavity contains the turbinates (conchae) and meatuses. While vascular, the specific Kiesselbach's anastomosis is septal (medial). * **Option D:** The posterior part of the nasal cavity is the site of **Woodruff’s plexus**, which is located over the posterior end of the middle turbinate and is responsible for posterior epistaxis. **Clinical Pearls for NEET-PG:** * **Little’s Area:** The most common site for anterior epistaxis, usually caused by finger picking or dry air. * **Woodruff’s Plexus:** Located in the posterior-lateral wall; associated with severe, posterior bleeding often seen in elderly or hypertensive patients. * **Trottter’s Triad:** Associated with Nasopharyngeal Carcinoma (noted for its proximity to the nasopharynx). * **Management:** Anterior epistaxis is primarily managed by firm pressure (Hippocratic maneuver) or anterior nasal packing.

Question 180: Cottle test is used for?

A. Septal perforation
B. Rhinophyma
C. Choanal atresia
D. DNS (Correct Answer)

Explanation: **Explanation:** The **Cottle test** is a clinical diagnostic maneuver used to evaluate **nasal valve stenosis**, which is often a functional consequence of **Deviated Nasal Septum (DNS)**. **Why DNS is the correct answer:** The nasal valve (specifically the internal nasal valve) is the narrowest part of the nasal airway. In cases of DNS, the airway is further compromised. During the Cottle test, the cheek of the affected side is pulled laterally. If this maneuver improves the patient's air intake, the test is **positive**, indicating that the obstruction is at the level of the nasal valve (often due to septal deviation or valve collapse). **Analysis of Incorrect Options:** * **Septal Perforation:** This is a physical hole in the septum, usually diagnosed via anterior rhinoscopy. It typically presents with whistling sounds or crusting, not valve collapse. * **Rhinophyma:** This is a benign skin condition (end-stage rosacea) causing a bulbous, hypertrophied nose. Diagnosis is clinical (visual inspection). * **Choanal Atresia:** This is a congenital posterior nasal obstruction. It is diagnosed by the inability to pass a catheter into the nasopharynx or via CT scan. **High-Yield Clinical Pearls for NEET-PG:** * **Modified Cottle Test:** Uses a small ear speculum or cotton swab to support the internal nasal valve specifically; it is more accurate than the standard test. * **Internal Nasal Valve:** Formed by the caudal edge of the upper lateral cartilage, the septum, and the head of the inferior turbinate. Normal angle is **10–15 degrees**. * **Treatment:** If the Cottle test is positive, the patient may require a **functional rhinoplasty** (e.g., spreader grafts) in addition to a septoplasty.

Practice by Chapter

Functional Endoscopic Sinus Surgery

Practice Questions

Balloon Sinuplasty

Practice Questions

Extended Endoscopic Approaches

Practice Questions

Frontal Sinus Surgery

Practice Questions

Sphenoid Sinus Surgery

Practice Questions

CSF Rhinorrhea Repair

Practice Questions

Revision Sinus Surgery

Practice Questions

Nasal Polyposis Management

Practice Questions

Invasive Fungal Sinusitis

Practice Questions

Orbital Complications of Sinusitis

Practice Questions

Intracranial Complications of Sinusitis

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Olfactory Disorders

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Rhinology — MCQs

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