Diseases of the Nose and Paranasal Sinuses — MCQs
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A 2-year-old patient presents with pain over the bridge of the nose, medial and deep to the eye, aggravated by eyeball movements. The patient also complains of nasal discharge. Examination reveals edema of both eyelids and swelling of the middle turbinate. Involvement of which of the following paranasal sinuses is suspected?
Zygomycosis, a destructive fungal infection of the sinuses, is likely to reach the brain by which of the following routes?
Cyanosis in a newborn that disappears on crying is seen in which condition?
Killian's incision is used for?
Which of the following statements is NOT true about the frontal sinus?
Which of the following is a complication of sinus disease?
What does the arterial ligation of the pterygoid plexus constitute?
What is the most common complication of sinusitis?
Caldwell-Luc operation is indicated for which condition?
Which of the following is NOT a characteristic of Rhinoscleroma?
Diseases of the Nose and Paranasal Sinuses Indian Medical PG Practice Questions and MCQs
Question 131: A 2-year-old patient presents with pain over the bridge of the nose, medial and deep to the eye, aggravated by eyeball movements. The patient also complains of nasal discharge. Examination reveals edema of both eyelids and swelling of the middle turbinate. Involvement of which of the following paranasal sinuses is suspected?
- A. Ethmoid Sinus (Correct Answer)
- B. Maxillary Sinus
- C. Frontal sinus
- D. Sphenoid sinus
Explanation: ### Explanation The clinical presentation points towards **Acute Ethmoid Sinusitis**, which is the most common cause of orbital complications in children. **1. Why Ethmoid Sinus is Correct:** * **Anatomy:** The ethmoid sinuses are located between the orbits, separated only by the paper-thin **lamina papyracea**. This proximity explains why ethmoiditis frequently leads to orbital symptoms like eyelid edema and pain deep to the eye. * **Pain Pattern:** Pain over the bridge of the nose and medial to the eye is classic for ethmoid involvement. Pain aggravated by eyeball movements suggests inflammation of the orbital periosteum or extraocular muscles (often a precursor to orbital cellulitis). * **Age Factor:** In a 2-year-old, the ethmoid and maxillary sinuses are the only ones sufficiently developed to cause clinical disease. The ethmoid sinus is present at birth and is the most common site of infection in this age group. * **Examination:** Swelling of the middle turbinate is a hallmark sign, as the anterior and middle ethmoidal cells drain into the middle meatus. **2. Why Other Options are Incorrect:** * **Maxillary Sinus:** While present at birth, maxillary sinusitis typically presents with cheek pain and pressure, not pain deep to the eye or bridge of the nose. * **Frontal Sinus:** This sinus does not start developing until age 2 and is usually not radiologically or clinically significant until age 6–7. * **Sphenoid Sinus:** This sinus typically develops later (around age 3–5) and presents with "vertex headache" or pain referred to the occiput, rather than the bridge of the nose. **3. NEET-PG Clinical Pearls:** * **Most common sinus involved in orbital cellulitis:** Ethmoid sinus (via lamina papyracea). * **Chandler’s Classification:** Used to grade orbital complications of sinusitis (Stage I: Preseptal cellulitis to Stage V: Cavernous sinus thrombosis). * **Developmental Milestone:** "Ethmoid at birth, Maxillary at birth, Sphenoid at 3, Frontal at 7." (Memory aid for sinus development).
Question 132: Zygomycosis, a destructive fungal infection of the sinuses, is likely to reach the brain by which of the following routes?
- A. Cavernous sinus (Correct Answer)
- B. External carotid artery
- C. Internal carotid artery
- D. Superior sagittal sinus
Explanation: **Explanation:** **Zygomycosis** (specifically Rhinocerebral Mucormycosis) is an aggressive, angioinvasive fungal infection typically seen in immunocompromised individuals or those with uncontrolled diabetes mellitus. **Why Cavernous Sinus is Correct:** The infection usually begins in the nasal turbinates or paranasal sinuses (especially the ethmoid and sphenoid sinuses). Due to its **angioinvasive nature**, the fungus invades the walls of blood vessels, leading to thrombosis and tissue necrosis. The primary route to the brain is via the **orbit**. The fungus spreads from the ethmoid sinuses through the lamina papyracea into the orbit, and subsequently reaches the **cavernous sinus** via the **ophthalmic veins** or the superior orbital fissure. From the cavernous sinus, it can involve cranial nerves (III, IV, V, VI) and extend directly into the brain parenchyma. **Why Other Options are Incorrect:** * **Internal Carotid Artery (ICA):** While the fungus can invade the ICA wall (leading to carotid artery thrombosis or mycotic aneurysms), the ICA is a vessel supplying blood *to* the brain; it is not the primary anatomical *route* of spread for the infection itself. * **External Carotid Artery:** This artery supplies the face and scalp; it does not provide a direct pathway to the intracranial compartment. * **Superior Sagittal Sinus:** This is a midline dural venous sinus. Infections reaching here typically originate from the frontal sinus or scalp veins, but it is not the classic route for the rapid, orbital-to-cavernous spread seen in Zygomycosis. **Clinical Pearls for NEET-PG:** * **Hallmark:** Black necrotic eschar on the turbinates or palate. * **Diagnosis:** KOH mount/Biopsy showing **broad, ribbon-like, non-septate hyphae** branching at **90° (right angles)**. * **Treatment:** Surgical debridement + Intravenous **Liposomal Amphotericin B**. * **Risk Factor:** Diabetic Ketoacidosis (the fungus thrives in acidic, glucose-rich environments).
Question 133: Cyanosis in a newborn that disappears on crying is seen in which condition?
- A. Laryngocoele
- B. Unilateral choanal atresia
- C. Bilateral choanal atresia (Correct Answer)
- D. Foreign body in the airway
Explanation: **Explanation:** **Bilateral Choanal Atresia** is the correct answer due to the unique physiology of newborns. Neonates are **obligate nasal breathers** until approximately 4–6 months of age. In bilateral choanal atresia, the posterior nasal airway is completely obstructed (bony or membranous). * **Mechanism of Cyanosis:** When the infant is quiet or feeding, they attempt to breathe through the nose, leading to respiratory distress and cyanosis. * **Relief on Crying:** When the infant cries, they open their mouth, allowing air to bypass the nasal obstruction and reach the lungs via the oropharynx. This leads to the classic clinical sign: **"Cyclic cyanosis"** (cyanosis relieved by crying and worsening during feeding). **Analysis of Incorrect Options:** * **Laryngocoele:** Typically presents with hoarseness or inspiratory stridor. While it can cause airway obstruction, it does not characteristically improve with crying; in fact, crying may exacerbate symptoms due to increased laryngeal pressure. * **Unilateral Choanal Atresia:** This is often asymptomatic at birth and may go undiagnosed until later in life, presenting as persistent unilateral nasal discharge. It does not cause acute neonatal cyanosis because the patent side provides an adequate airway. * **Foreign Body in Airway:** This usually presents with sudden onset choking, wheezing, or stridor. Crying typically worsens the respiratory distress rather than relieving it. **High-Yield Clinical Pearls for NEET-PG:** * **Immediate Management:** Insertion of a **McGovern nipple** (a large nipple with the end cut off) or an oropharyngeal airway to maintain the oral airway. * **Diagnosis:** Failure to pass a 6F or 8F suction catheter through the nose into the nasopharynx. **CT scan** is the gold standard for confirmation. * **Association:** Often part of the **CHARGE syndrome** (Coloboma, Heart defects, Atresia choanae, Retarded growth, Genitourinary anomalies, Ear anomalies). * **Definitive Treatment:** Surgical repair (Transnasal or Transpalatal approach).
Question 134: Killian's incision is used for?
- A. Submucous resection of nasal septum (Correct Answer)
- B. Intranasal antrostomy
- C. Caldwell-Luc operation
- D. Myringoplasty
Explanation: ### Explanation **Correct Answer: A. Submucous resection of nasal septum** **Why it is correct:** Killian’s incision is the classic incision used for **Submucous Resection (SMR)** of the nasal septum. It is a slanted, curvilinear incision made on the nasal septum, approximately **5 mm superior and posterior** to the caudal margin of the septal cartilage. It is specifically designed to bypass the columella and access the subperichondrial plane to remove the deflected bony and cartilaginous parts of the septum while preserving the mucosal flaps. **Analysis of Incorrect Options:** * **B. Intranasal antrostomy:** This procedure involves creating an opening in the inferior meatus to drain the maxillary sinus. It does not involve a septal incision. * **C. Caldwell-Luc operation:** This is a radical antrum operation where the maxillary sinus is accessed via a **sublabial incision** (in the gingivolabial sulcus) above the canine fossa. * **D. Myringoplasty:** This is an otological procedure used to repair a perforation of the tympanic membrane. Common incisions include the Wilde’s post-aural or Endaural (Lempert’s) incision. **High-Yield Clinical Pearls for NEET-PG:** * **Killian’s vs. Freer’s Incision:** While Killian’s is used for SMR, **Freer’s incision** (hemitransfixion incision) is made at the very **caudal border** of the septal cartilage and is the preferred incision for **Septoplasty**, especially when correcting caudal dislocations. * **SMR Contraindication:** SMR is generally avoided in children (usually below 17 years) as it can interfere with midfacial growth, leading to a saddle nose deformity. * **Complication:** The most common complication of SMR is a septal perforation, often occurring at the site of the incision if bilateral mucosal tears occur.
Question 135: Which of the following statements is NOT true about the frontal sinus?
- A. Osteomas are common.
- B. Sinusitis can lead to morning headaches.
- C. It opens into the middle meatus.
- D. It is present at birth. (Correct Answer)
Explanation: **Explanation:** The correct answer is **D (It is present at birth)** because the frontal sinus is not anatomically present at birth. It is the last paranasal sinus to develop, typically appearing radiologically around the age of 5–7 years and reaching full adult size after puberty (around age 15–20). **Analysis of Options:** * **Option A (Osteomas are common):** This is a true statement. The frontal sinus is the most common site for paranasal sinus osteomas (benign bony tumors). They are often asymptomatic and discovered incidentally on imaging. * **Option B (Morning headaches):** This is a classic clinical feature of frontal sinusitis. It is often referred to as an **"Office Headache"**—the pain typically starts in the morning, peaks by midday as the sinus drains via gravity, and subsides by the evening. * **Option C (Opens into the middle meatus):** This is anatomically correct. The frontal sinus drains into the middle meatus via the frontonasal duct, which opens into the anterior part of the hiatus semilunaris or the ethmoid infundibulum. **NEET-PG High-Yield Pearls:** * **Developmental Sequence:** Ethmoid (present at birth) → Maxillary (present at birth, but rudimentary) → Sphenoid (appears age 3–5) → Frontal (appears age 5–7). * **Radiology:** The frontal sinus is the most common sinus to be **agenetic** (absent) in about 5-10% of the population. * **Complications:** Frontal sinusitis can lead to **Pott’s Puffy Tumor**, which is a subperiosteal abscess of the frontal bone presenting as a doughy swelling on the forehead.
Question 136: Which of the following is a complication of sinus disease?
- A. Retrobulbar neuritis
- B. Orbital cellulitis
- C. Cavernous sinus thrombosis
- D. Superior orbital fissure syndrome (Correct Answer)
Explanation: **Explanation:** **Superior Orbital Fissure Syndrome (SOFS)** is a rare but serious complication of inflammatory or infectious sinus disease, particularly involving the **sphenoid sinus**. The sphenoid sinus is anatomically adjacent to the superior orbital fissure. When infection or inflammation spreads to this fissure, it compresses or affects the structures passing through it, leading to a characteristic clinical triad: 1. **Ophthalmoplegia:** Paralysis of Cranial Nerves III, IV, and VI (leading to a fixed, dilated pupil and loss of eye movement). 2. **Sensory Loss:** Anesthesia in the distribution of the Ophthalmic nerve (V1). 3. **Proptosis:** Due to venous congestion and muscle paralysis. **Why other options are incorrect:** * **Orbital Cellulitis & Cavernous Sinus Thrombosis (CST):** While these are indeed complications of sinusitis (ethmoid and sphenoid respectively), they are categorized as **orbital** and **intracranial** complications. In the context of specific "syndromes" arising from sinus disease extension, SOFS is a distinct clinical entity involving the bony fissure itself. * **Retrobulbar Neuritis:** This is an inflammation of the optic nerve (CN II). While it can rarely occur with sphenoiditis, the optic nerve passes through the **Optic Canal**, not the superior orbital fissure. If the optic nerve is involved along with SOFS, it is termed **Orbital Apex Syndrome**. **High-Yield NEET-PG Pearls:** * **Most common sinus causing orbital complications:** Ethmoid sinus (due to the thin *lamina papyracea*). * **Orbital Apex Syndrome:** SOFS + Optic nerve involvement (Vision loss/Blindness). * **Chandler’s Classification:** Used to grade orbital complications of sinusitis (Stage I: Preseptal cellulitis to Stage V: CST). * **Key differentiator:** In SOFS, vision is preserved; in Orbital Apex Syndrome, vision is lost.
Question 137: What does the arterial ligation of the pterygoid plexus constitute?
- A. Anastomosis between a branch of the maxillary artery and a branch of the facial artery (Correct Answer)
- B. Anastomoses between two branches of the facial artery
- C. Anastomoses between two branches of the maxillary artery
- D. None of the above
Explanation: ### Explanation **Concept Overview** The question refers to the vascular communications within the infratemporal fossa, specifically involving the **pterygoid plexus of veins** and its surrounding arterial relations. In the context of ENT and maxillofacial surgery, the "arterial ligation" or communication associated with this region involves the **Maxillary artery** (a terminal branch of the External Carotid) and the **Facial artery**. **Why Option A is Correct** The pterygoid plexus serves as a critical venous hub that communicates with both deep and superficial structures. Arterially, the **Sphenopalatine artery** (a branch of the Maxillary artery) and the **Greater Palatine artery** frequently anastomose with the **Superior Labial** and **Lateral Nasal** branches of the **Facial artery** (notably at Little’s area/Kiesselbach’s plexus). Furthermore, the deep facial vein connects the facial vein to the pterygoid plexus, bridging the superficial facial system with the deep maxillary system. **Why Other Options are Incorrect** * **Options B and C:** These options describe isolated anastomoses within the same arterial system. While these occur (e.g., branches of the maxillary artery anastomosing with each other), they do not define the specific clinical significance of the pterygoid region's role as a bridge between the **deep (Maxillary)** and **superficial (Facial)** vascular territories. **Clinical Pearls for NEET-PG** * **Little’s Area (Kiesselbach’s Plexus):** The most common site for epistaxis. It involves the anastomosis of five arteries: Sphenopalatine, Greater Palatine, Superior Labial, Anterior Ethmoidal, and Posterior Ethmoidal. * **Woodruff’s Plexus:** Located posteriorly on the lateral wall of the nasal cavity; the primary source of posterior epistaxis (mainly the Sphenopalatine artery). * **Danger Area of the Face:** The pterygoid plexus communicates with the **Cavernous Sinus** via emissary veins. Infections from the face can lead to Cavernous Sinus Thrombosis through this route. * **Maxillary Artery:** It is divided into three parts by the Lateral Pterygoid muscle—a high-yield anatomical landmark.
Question 138: What is the most common complication of sinusitis?
- A. Orbital cellulitis (Correct Answer)
- B. Meningitis
- C. Brain abscess
- D. Septicemia
Explanation: **Explanation:** The paranasal sinuses are separated from the orbit by extremely thin bony barriers, most notably the **lamina papyracea** of the ethmoid bone. Due to this anatomical proximity and a shared venous drainage system (valveless ophthalmic veins), infections can easily spread from the sinuses to the orbit. **1. Why Orbital Cellulitis is Correct:** Orbital complications are the **most common** complications of acute sinusitis, occurring in approximately 80% of cases that extend beyond the sinus walls. Among these, the ethmoid sinus is the most frequent source in children, while the frontal sinus is more common in adults. The progression typically follows Chandler’s Classification, starting from preseptal cellulitis to orbital cellulitis and potentially orbital abscess. **2. Analysis of Incorrect Options:** * **B & C (Meningitis and Brain Abscess):** These are **intracranial complications**. While life-threatening, they are significantly less common than orbital complications. Meningitis is the most common intracranial complication, whereas a brain abscess (often in the frontal lobe) is the most common "space-occupying" intracranial complication. * **D (Septicemia):** This is a systemic spread of infection. While it can occur in severe, untreated cases or in immunocompromised patients, it is a rare primary complication compared to localized spread to the orbit. **Clinical Pearls for NEET-PG:** * **Most common sinus involved in orbital complications:** Ethmoid sinus. * **Most common intracranial complication:** Meningitis. * **Pott’s Puffy Tumor:** A high-yield term referring to osteomyelitis of the frontal bone with overlying soft tissue edema, usually secondary to frontal sinusitis. * **Cavernous Sinus Thrombosis:** A dreaded vascular complication characterized by bilateral symptoms, chemosis, and CN III, IV, and VI palsies.
Question 139: Caldwell-Luc operation is indicated for which condition?
- A. Frontal sinusitis
- B. Maxillary sinusitis (Correct Answer)
- C. Ethmoid sinusitis
- D. Sphenoid sinusitis
Explanation: The **Caldwell-Luc operation** is a classic surgical procedure designed to provide direct access to the **maxillary sinus**. It involves creating an opening in the canine fossa (above the premolar teeth) to enter the sinus, followed by the creation of an intranasal antrostomy for drainage. ### Why Maxillary Sinusitis is Correct: The procedure is specifically indicated for chronic maxillary sinusitis that is unresponsive to conservative management or endoscopic approaches. It allows for the complete removal of irreversible diseased mucosa, polyps, or foreign bodies (like a displaced tooth root) from the maxillary antrum. It is also the approach used for biopsy of maxillary tumors and for the **Denker’s operation** (an extension for reaching the nasopharynx). ### Why Other Options are Incorrect: * **Frontal Sinusitis:** Managed via procedures like the Lynch-Howarth operation, Trephination, or more commonly, Functional Endoscopic Sinus Surgery (FESS). * **Ethmoid Sinusitis:** Addressed via internal or external ethmoidectomy (e.g., Patterson’s or Jansen-Horgan approach). * **Sphenoid Sinusitis:** Accessed via transnasal or transethmoidal routes, often using endoscopic techniques. ### High-Yield Clinical Pearls for NEET-PG: * **Key Indications:** Chronic maxillary sinusitis with irreversible changes, Oro-antral fistula closure, and removal of **Antrochoanal polyps** (to prevent recurrence by removing the base). * **Common Complication:** Numbness of the cheek or upper teeth due to injury to the **infraorbital nerve**. * **Current Status:** Largely replaced by **FESS** (Functional Endoscopic Sinus Surgery), which is more physiological and less invasive. * **Landmark:** The incision is made in the gingivolabial sulcus, lateral to the frenulum.
Question 140: Which of the following is NOT a characteristic of Rhinoscleroma?
- A. Presence of Mikulicz cells
- B. Caused by a fungus (Correct Answer)
- C. More common in northern areas
- D. Characterized by a 'woody nose'
Explanation: **Explanation:** Rhinoscleroma is a chronic, progressive granulomatous disease of the upper respiratory tract. The correct answer is **B** because Rhinoscleroma is caused by a **bacterium**, specifically ***Klebsiella pneumoniae subsp. rhinoscleromatis*** (Frisch Bacillus), not a fungus. **Analysis of Options:** * **Option A (Mikulicz cells):** This is a hallmark histopathological feature. These are large, foamy histocytes (macrophages) with a vacuolated cytoplasm containing the causative bacilli. * **Option B (Correct):** As stated, the etiology is bacterial (Gram-negative, encapsulated coccobacillus). * **Option C (Geographic distribution):** In India, the disease is endemic and significantly more common in **northern areas** (e.g., Rajasthan, Punjab, Haryana) compared to the south. * **Option D (Woody nose):** During the **proliferative/hypertrophic stage**, there is extensive formation of hard, non-tender granulomatous tissue. This leads to a characteristic "woody" or "stony" hardness of the nose and may cause widening of the nasal bridge (Hebra nose). **High-Yield Clinical Pearls for NEET-PG:** * **Stages:** It progresses through three stages: 1. Atrophic (mimics atrophic rhinitis), 2. Granulomatous/Proliferative (nodule formation), and 3. Cicatricial (scarring and stenosis). * **Pathology:** Look for **Mikulicz cells** and **Russell bodies** (eosinophilic inclusion bodies representing degenerated plasma cells). * **Treatment:** Long-term antibiotics are required. **Streptomycin and Tetracycline** are the traditional drugs of choice; Ciprofloxacin is also effective. * **Biopsy:** It is the definitive diagnostic tool.
Practice by Chapter
Rhinitis
Practice Questions
Acute Rhinosinusitis
Practice Questions
Chronic Rhinosinusitis
Practice Questions
Nasal Polyposis
Practice Questions
Allergic Fungal Sinusitis
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Deviated Nasal Septum
Practice Questions
Epistaxis
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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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