Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses Indian Medical PG Practice Questions and MCQs

Question 51: Which of the following is NOT a cause of traumatic epistaxis?

A. Anterior epistaxis
B. Posterior epistaxis (Correct Answer)
C. Childhood
D. Adulthood

Explanation: **Explanation:** Epistaxis is broadly classified based on the site of bleeding into **Anterior** and **Posterior** types. The question asks for the option that is NOT a cause (or rather, a classification/demographic) typically associated with **traumatic** etiology in the context of common clinical patterns. **1. Why "Posterior Epistaxis" is the correct answer:** Posterior epistaxis originates from the sphenopalatine artery or its branches (Woodruff’s plexus). It is most commonly associated with **systemic causes**, particularly **hypertension** and cardiovascular diseases, or neoplasia. Unlike anterior bleeding, it is rarely caused by simple digital trauma (nose picking) or minor facial trauma. Therefore, in a comparative clinical context, it is the least likely to be primarily "traumatic" in origin. **2. Analysis of other options:** * **Anterior Epistaxis:** This is the most common type of epistaxis. The primary cause is **trauma**, specifically "nose picking" (fingernail trauma) to Little’s area (Kiesselbach’s plexus). * **Childhood:** Trauma is the leading cause of epistaxis in children, usually due to digital trauma or the insertion of foreign bodies. * **Adulthood:** While systemic causes increase with age, trauma (facial injuries, fractures, or accidental digital trauma) remains a significant cause of epistaxis in adults. **Clinical Pearls for NEET-PG:** * **Little’s Area:** Located on the anteroinferior part of the nasal septum; the most common site for anterior epistaxis. It involves the anastomosis of four arteries: Anterior Ethmoidal, Sphenopalatine, Greater Palatine, and Superior Labial. * **Woodruff’s Plexus:** Located postero-lateral to the turbinates; the most common site for posterior epistaxis. * **First-line management:** For anterior epistaxis, **Trotter’s method** (pinching the nose and leaning forward) is the initial step. * **Most common cause of epistaxis overall:** Trauma (specifically nose picking).

Question 52: Proliferation of nasal masses in Rhinoscleroma produces a characteristic configuration typical of the disease?

A. Hebra nose (Correct Answer)
B. Scrofula
C. Nose root deformity
D. Mongolian nose

Explanation: **Explanation:** **Rhinoscleroma** is a chronic granulomatous disease caused by *Klebsiella rhinoscleromatis* (Frisch bacillus). It typically progresses through three stages: Catarrhal, Proliferative (Granulomatous), and Cicatricial. 1. **Why "Hebra nose" is correct:** During the **proliferative stage**, there is extensive formation of painless, woody-hard granulomatous masses in the nasal cavity. These masses cause expansion and widening of the external nose, leading to a characteristic "tapir-like" or "frog-like" appearance known as **Hebra nose** (named after Ferdinand Ritter von Hebra). 2. **Why other options are incorrect:** * **Scrofula:** Refers to tuberculous cervical lymphadenitis (cold abscess of the neck), not a nasal deformity. * **Nose root deformity:** While various conditions can affect the nasal bridge (like the "Saddle nose" in Syphilis or Leprosy), it is not the specific term used for the proliferative expansion seen in Rhinoscleroma. * **Mongolian nose:** This is not a recognized medical term for a nasal pathology; it likely refers to ethnic variations in nasal morphology (Platyrrhine nose). **High-Yield Clinical Pearls for NEET-PG:** * **Causative Agent:** *Klebsiella rhinoscleromatis* (Gram-negative, capsulated diplobacillus). * **Histopathology (Pathognomonic):** * **Mikulicz cells:** Large foamy histocytes containing the bacilli. * **Russell bodies:** Eosinophilic hyaline inclusions representing degenerated plasma cells. * **Treatment:** Long-term antibiotics (Streptomycin and Tetracycline are traditional; Ciprofloxacin is currently preferred) and surgical debridement if necessary. * **Biopsy Site:** The edge of the lesion is most diagnostic.

Question 53: Which of the following statements is false regarding frontal sinusitis?

A. Pain shows periodicity.
B. It is the most common sinus involved in infants and children. (Correct Answer)
C. Pain is referred to as office headache.
D. Tenderness is present just above the medial canthus of the eye.

Explanation: ### Explanation **1. Why Option B is the Correct (False) Statement:** The **ethmoid sinus** is the most common sinus involved in infants and children. This is because the ethmoid sinuses are present and well-developed at birth. In contrast, the **frontal sinus** is clinically and radiologically absent at birth; it only begins to develop around age 2 and does not reach the level of the orbit until age 6–7. Therefore, frontal sinusitis is rare in early childhood and typically seen in adolescents and adults. **2. Analysis of Other Options:** * **Option A (Periodicity):** Frontal sinusitis is classic for its "periodicity." Pain typically starts in the morning (as secretions accumulate), peaks at midday, and subsides in the evening as the sinus drains due to the upright posture. * **Option C (Office Headache):** Because the pain follows a 10 AM to 4 PM schedule (matching typical office hours), it is clinically referred to as an "Office Headache." * **Option D (Tenderness):** The thinnest wall of the frontal sinus is the floor. Tenderness is best elicited by firm upward pressure on the floor of the sinus, located just **above the medial canthus**. **3. High-Yield Clinical Pearls for NEET-PG:** * **Developmental Milestones:** * *Present at birth:* Ethmoid (most developed) and Maxillary (rudimentary). * *Last to develop:* Sphenoid (age 3) and Frontal (age 6-7). * **Most common sinus involved in adults:** Maxillary sinus. * **Most common cause of orbital cellulitis:** Ethmoid sinusitis. * **Pott’s Puffy Tumor:** A serious complication of frontal sinusitis presenting as osteomyelitis of the frontal bone with subperiosteal abscess.

Question 54: Following a Caldwell-Luc procedure, through which anatomical structure is intranasal antrostomy performed?

A. Superior meatus
B. Middle meatus
C. Inferior meatus (Correct Answer)
D. Floor of the nose

Explanation: **Explanation:** The **Caldwell-Luc procedure** is a radical antral surgery where the maxillary sinus is accessed via the canine fossa (sublabial approach). A crucial step in this procedure is the creation of a permanent "drainage window" or **intranasal antrostomy** to ensure gravity-dependent drainage and ventilation of the sinus. **Why Inferior Meatus is Correct:** The **inferior meatus** is the preferred site for traditional intranasal antrostomy because it represents the lowest part of the lateral nasal wall. Creating an opening here allows for **gravity-dependent drainage** of secretions from the maxillary sinus into the nasal cavity. Anatomically, this involves breaking the thin bone of the lateral wall of the inferior meatus. **Analysis of Incorrect Options:** * **Superior Meatus:** This is located high in the nasal cavity and receives drainage from the posterior ethmoid cells and sphenoid sinus (via the sphenoethmoidal recess). It is anatomically unrelated to maxillary sinus drainage. * **Middle Meatus:** While the *natural* ostium of the maxillary sinus is located in the middle meatus (hiatus semilunaris), a Caldwell-Luc procedure specifically utilizes the inferior meatus for a supplementary, artificial drainage port. Functional Endoscopic Sinus Surgery (FESS), however, focuses on the middle meatus. * **Floor of the Nose:** The floor is formed by the palatine process of the maxilla and horizontal plate of the palatine bone. It is a thick bony structure and does not provide direct access to the maxillary antrum. **NEET-PG High-Yield Pearls:** * **Indications for Caldwell-Luc:** Removal of foreign bodies (e.g., a root of a tooth), management of Oro-antral fistula, and removal of fungal balls or Antrochoanal polyps (recurrent cases). * **Complication:** The most common complication is **cheek anesthesia or paresthesia** due to injury to the **infraorbital nerve**. * **Modern Shift:** FESS has largely replaced Caldwell-Luc for routine sinusitis, as FESS preserves the mucociliary clearance directed toward the natural ostium in the middle meatus.

Question 55: All of the following is true about inverted papilloma of the nose except?

A. Arises from the lateral wall of the nose
B. Usually unilateral
C. In 5-10% of cases, it is associated with malignancy (Correct Answer)
D. Endoscopic endonasal excision is the treatment of choice

Explanation: ### Explanation Inverted Papilloma (Schneiderian Papilloma) is a benign but locally aggressive sinonasal tumor. **Why Option C is the correct answer (The False Statement):** While inverted papilloma is known for its association with **Squamous Cell Carcinoma (SCC)**, the incidence of malignancy is generally reported to be around **10–15%** (some texts cite up to 19%). Option C underestimates this risk. More importantly, in the context of NEET-PG questions, this option is often the "except" choice because the other three options represent definitive, classic characteristics of the disease. **Analysis of Incorrect Options (True Statements):** * **Option A:** It characteristically arises from the **lateral wall of the nose** (specifically the middle meatus or ethmoid sinus). This distinguishes it from common nasal polyps which often arise from the ethmoids. * **Option B:** It is almost always **unilateral**. Bilateral presentation is rare and should raise suspicion of other pathologies. * **Option D:** **Endoscopic endonasal excision** (often a Medial Maxillectomy) is currently the **treatment of choice**. While historical treatment involved lateral rhinotomy (Caldwell-Luc), advancements in endoscopes allow for complete clearance with lower morbidity. **Clinical Pearls for NEET-PG:** * **Histology:** It is called "inverted" because the surface epithelium proliferates and invaginates into the underlying stroma (rather than growing outward). * **Etiology:** Strongly associated with **Human Papillomavirus (HPV)** types 6, 11, 16, and 18. * **Recurrence:** It has a high recurrence rate (approx. 20-30%), necessitating long-term follow-up. * **Radiology:** On CT, it may show a "bony remodeling" or focal hyperostosis at the site of origin, which helps the surgeon identify the tumor stalk.

Question 56: The sublabial approach to the maxillary sinus is made through which anatomical location?

A. Superior meatus of the nose
B. Middle meatus of the nose
C. Inferior meatus of the nose
D. Canine fossa (Correct Answer)

Explanation: ### Explanation The sublabial approach to the maxillary sinus is the hallmark of the **Caldwell-Luc operation**. This surgical procedure involves making an incision in the gingivolabial sulcus (above the premolar teeth) to gain access to the anterior wall of the maxilla. **1. Why the Canine Fossa is Correct:** The **canine fossa** is a depression on the anterior surface of the maxilla, located lateral to the canine eminence. It represents the thinnest portion of the anterior maxillary wall. Entering through this site provides the widest possible surgical view of the maxillary sinus interior, allowing for the removal of irreversible mucosal disease, polyps, or foreign bodies. **2. Analysis of Incorrect Options:** * **A, B, and C (Nasal Meati):** These are intranasal structures. While the maxillary sinus naturally drains into the **middle meatus** (via the ostium) and can be surgically accessed via an intranasal antrostomy in the **inferior meatus**, these are *endonasal* routes, not *sublabial* (under the lip) approaches. The superior meatus is associated with the posterior ethmoid cells and sphenoid sinus, not the maxillary sinus. **3. Clinical Pearls for NEET-PG:** * **Indications for Caldwell-Luc:** Recurrent antrochoanal polyps, retrieval of a displaced root of a tooth from the sinus, orbital floor decompression, and management of maxillary fractures. * **Complication:** The most common complication is **infraorbital nerve injury**, leading to numbness of the cheek and upper lip. * **Modern Shift:** Functional Endoscopic Sinus Surgery (FESS) has largely replaced this procedure for routine sinusitis, but Caldwell-Luc remains high-yield for specific indications like tumors or trauma.

Question 57: A 32-year-old female patient underwent extraction of a right upper first molar, resulting in a 0.3 mm perforation of the sinus wall. What procedure would you recommend?

A. Caldwell-Luc operation
B. Suture
C. Antibiotic dressing and secondary healing
D. No treatment required (Correct Answer)

Explanation: ### Explanation **Correct Answer: D. No treatment required** **1. Why "No treatment required" is correct:** The patient has an **Oroantral Communication (OAC)**, a common complication following the extraction of maxillary premolars or molars due to the close proximity of their roots to the floor of the maxillary sinus. The management of an OAC is primarily determined by the **size of the perforation**: * **Small perforations (< 2 mm):** These usually heal spontaneously through the formation of a healthy blood clot and secondary intention. No surgical intervention is required. * **Moderate perforations (2–6 mm):** These require stabilization of the clot (e.g., figure-of-eight suture, Gelfoam) and antibiotics. * **Large perforations (> 6 mm):** These require surgical closure using local flaps (e.g., Buccal advancement flap). In this case, the perforation is only **0.3 mm**, which is well below the threshold for intervention. Spontaneous healing is expected. **2. Why other options are incorrect:** * **A. Caldwell-Luc operation:** This is a radical procedure used to remove diseased sinus mucosa or foreign bodies (like a displaced root). It is not indicated for a tiny, fresh perforation. * **B. Suture:** Suturing the gingiva is unnecessary for a 0.3 mm opening and may cause unnecessary tension on the tissues. * **C. Antibiotic dressing:** While prophylactic antibiotics may be prescribed orally, "dressing" the tiny hole is not standard practice as it might interfere with the natural blood clot formation. **3. NEET-PG High-Yield Pearls:** * **Most common site for OAC:** Maxillary first molar extraction. * **Clinical Sign:** "Escape of fluids" from the nose into the mouth or "escape of air" into the mouth when blowing the nose (Valsalva maneuver). * **Management Advice:** Patients should be advised **not to blow their nose** for 2 weeks to prevent pressure changes that could dislodge the healing clot. * **Chronic OAC:** If a communication persists for >48–72 hours, it becomes epithelialized and is termed an **Oroantral Fistula (OAF)**, which always requires surgical closure.

Question 58: Paranasal sinuses are ventilated during which phase of respiration?

A. Inspiration
B. Expiration (Correct Answer)
C. Mid inspiration
D. Deep inspiration

Explanation: **Explanation:** The ventilation of the paranasal sinuses (PNS) is a paradoxical process that primarily occurs during **expiration**. **1. Why Expiration is Correct:** During expiration, the air being exhaled from the lungs is warm and moist. As this air passes through the nasal cavity, it creates a positive pressure gradient. According to the principles of airflow, this positive pressure "pushes" the warm, humidified air through the narrow ostia into the paranasal sinuses. This mechanism ensures that the sinuses are ventilated and their mucosal linings remain moist. **2. Why Other Options are Incorrect:** * **Inspiration (A, C, D):** During inspiration, air is drawn rapidly into the lungs, creating a negative pressure (suction effect) within the nasal cavity. This negative pressure actually tends to draw air *out* of the sinuses rather than into them. Therefore, whether it is mid-inspiration or deep inspiration, the pressure dynamics do not favor the entry of fresh air into the sinus cavities. **3. Clinical Pearls for NEET-PG:** * **Bernoulli’s Principle:** The rapid flow of air during inspiration across the sinus ostia creates a vacuum effect (negative pressure), which helps in the drainage of secretions but not ventilation. * **Gas Exchange:** While ventilation occurs during expiration, the actual exchange of oxygen and carbon dioxide within the sinus occurs slowly via diffusion through the ostia. * **Ostomeatal Complex:** This is the functional unit of the anterior ethmoid, frontal, and maxillary sinuses. Obstruction here (due to polyps or edema) prevents this expiratory ventilation, leading to sinusitis. * **Developmental Fact:** The **Maxillary** and **Ethmoid** sinuses are present at birth, while the **Frontal** sinus is the last to develop (clinically significant after age 6-7).

Question 59: All of the following conditions are associated with septal perforation, EXCEPT:

A. Septal abscess
B. Leprosy
C. Rhinophyma (Correct Answer)
D. Trauma

Explanation: **Explanation:** The correct answer is **Rhinophyma**. This condition is a benign, hypertrophic skin disorder of the nose resulting from long-standing, untreated rosacea (Phymatous Rosacea). It involves hyperplasia of the sebaceous glands and connective tissue of the nasal tip and alae, leading to a bulbous, "potato-like" appearance. Crucially, it is a **dermatological condition** affecting the external skin and does not involve the nasal septum or lead to perforation. **Why the other options are incorrect:** * **Septal Abscess:** This is the most common cause of septal perforation following trauma or surgery. Collection of pus between the mucoperichondrium and cartilage leads to pressure necrosis and ischemia of the underlying avascular septal cartilage, resulting in a permanent hole. * **Leprosy:** Chronic granulomatous infections like Leprosy (specifically Lepromatous type) and Tuberculosis are classic causes. Leprosy typically affects the cartilaginous part of the septum, leading to ulceration and eventual perforation. * **Trauma:** This includes surgical trauma (e.g., post-SMR or Septoplasty), digital trauma (nose picking/epistaxis digitorum), and chemical trauma (cocaine abuse or occupational exposure to chromium/arsenic). **Clinical Pearls for NEET-PG:** * **Most common site of perforation:** The anterior cartilaginous septum (Little’s area). * **Occupational cause:** Chrome workers (Chrome holes). * **Wegener’s Granulomatosis:** A high-yield systemic cause characterized by a "saddle nose" deformity and septal perforation. * **Symptom:** Small anterior perforations often produce a characteristic **whistling sound** during respiration, whereas large perforations cause crusting and epistaxis.

Question 60: All of the following are true of a submucous resection operation for DNS except?

A. Indicated in septal deviation
B. Mucoperichondrium is removed (Correct Answer)
C. Preferably done after 16 years of age
D. Done in some cases of epistaxis

Explanation: ### Explanation **Submucous Resection (SMR)** is a classic surgical procedure used to correct a Deviated Nasal Septum (DNS). The fundamental principle of SMR is the removal of the bony and cartilaginous framework of the septum while preserving the overlying mucosal flaps. **Why Option B is the Correct Answer (The "Except"):** In SMR, the **mucoperichondrium and mucoperiosteum are strictly preserved**. The surgeon elevates these flaps to access the underlying cartilage and bone. Removing the mucoperichondrium would lead to large septal perforations, loss of blood supply to the remaining cartilage, and significant crusting. Therefore, saying it is "removed" is factually incorrect. **Analysis of Other Options:** * **Option A (Indicated in DNS):** This is the primary indication. It is performed when a deviated septum causes functional obstruction or headaches (Sluder’s neuralgia). * **Option C (Preferably done after 16 years):** SMR involves the removal of a significant portion of the septal framework. If done in children, it can interfere with the growth of the midface and the bridge of the nose. Hence, it is traditionally delayed until skeletal maturity (16–18 years). * **Option D (Done in epistaxis):** SMR is indicated in cases of epistaxis where a septal spur causes localized drying/ulceration or when the deviation prevents access to a bleeding point for cauterization. **High-Yield Clinical Pearls for NEET-PG:** * **Killian’s Incision:** The standard incision for SMR, made 5mm above the caudal border of the septal cartilage. * **Complications:** The most common complication of SMR is a **septal hematoma**, which if untreated, leads to a **septal abscess** and subsequent **Saddle Nose Deformity**. * **SMR vs. Septoplasty:** Unlike SMR, Septoplasty is a more conservative "reconstructive" surgery that can be performed in children and preserves more of the septal framework.

Practice by Chapter

Rhinitis

Practice Questions

Acute Rhinosinusitis

Practice Questions

Chronic Rhinosinusitis

Practice Questions

Nasal Polyposis

Practice Questions

Allergic Fungal Sinusitis

Practice Questions

Deviated Nasal Septum

Practice Questions

Epistaxis

Practice Questions

Nasal Trauma

Practice Questions

Choanal Atresia

Practice Questions

CSF Rhinorrhea

Practice Questions

Tumors of the Nose and Paranasal Sinuses

Practice Questions

Complications of Sinusitis

Practice Questions

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