Diseases of the Nose and Paranasal Sinuses Practice Questions

Q: What is the most common intracranial complication of chronic sinusitis?

Subdural abscess. **Explanation:** The correct answer is **Subdural abscess**. **Why Subdural Abscess is Correct:** In the context of **chronic sinusitis** (particularly involving the frontal sinus), a subdural abscess is the most frequently encountered intracranial complication. The infection typically spreads via **retrograde thrombophlebitis** through the valveless diploic veins of Breschet. Because the subdural space is a large, potential space with little resistance, pus can spread rapidly over the cerebral hemispheres. Clinically, it is a neurosurgical emergency characterized by rapid neurological deterioration, seizures, and signs of increased intracranial pressure. **Analysis of Incorrect Options:** * **Meningitis:** While meningitis is the most common intracranial complication of **acute** sinusitis (and the most common complication of ear infections), it is less frequent than subdural abscess in chronic sinus disease. * **Brain Abscess:** This is the second most common intracranial complication of chronic sinusitis. It usually occurs in the frontal lobe and develops more slowly than a subdural abscess. * **Cavernous Sinus Thrombosis:** This is a rare but life-threatening complication, most commonly arising from infections of the "danger area of the face" or the sphenoid and ethmoid sinuses. **NEET-PG High-Yield Pearls:** * **Most common overall complication of sinusitis:** Orbital complications (specifically Preseptal/Orbital cellulitis). * **Most common intracranial complication of ACUTE sinusitis:** Meningitis. * **Most common intracranial complication of CHRONIC sinusitis:** Subdural abscess. * **Pott’s Puffy Tumor:** This is osteomyelitis of the frontal bone with a subperiosteal abscess, often seen as a precursor or accompaniment to intracranial spread. * **Imaging Gold Standard:** Contrast-enhanced CT or MRI (MRI is superior for intracranial soft tissue detail).

Q: A child has a retained disc battery in the nose. What is the most important consideration in the management?

The battery substance can leak and cause tissue damage.. **Explanation:** A retained disc battery (button battery) in the nasal cavity is a **surgical emergency**. Unlike inert foreign bodies, disc batteries cause rapid and severe tissue destruction through three primary mechanisms: 1. **Leakage of alkaline contents:** The corrosive substance (usually potassium or sodium hydroxide) causes liquefactive necrosis. 2. **Electrical current:** The moist mucosa completes an electrical circuit, leading to electrolysis and the generation of hydroxide ions at the negative pole. 3. **Pressure necrosis:** Direct physical pressure on the septum. **Analysis of Options:** * **Option A (Correct):** The leakage of caustic alkaline substances leads to rapid **liquefactive necrosis**, which can cause septal perforation within hours. This is the most critical pathological consideration. * **Option B:** While any foreign body carries a theoretical risk, tetanus is not the primary or immediate concern in nasal battery impaction. * **Option C:** While a specialist (ENT surgeon) should ideally remove it, the "most important consideration" in the management logic is understanding the **pathophysiology (tissue damage)** that necessitates urgent intervention. * **Option D:** **Contraindicated.** Instilling nasal drops or irrigation creates a moist environment that enhances the electrical circuit and accelerates the leakage of corrosive chemicals, worsening the injury. **NEET-PG High-Yield Pearls:** * **Emergency Status:** Nasal disc batteries must be removed immediately (within 2–4 hours) to prevent permanent septal perforation and saddle nose deformity. * **Radiology:** On X-ray, look for the **"Double-Contour" or "Step-off" sign** (lateral view) and the **"Halo sign"** (AP view) to differentiate a battery from a coin. * **Management Tip:** Never use oil or saline drops; keep the area dry until the battery is extracted.

Q: Which of the following conditions does not lead to septal perforation?

Rhinosporidiosis. **Explanation:** The correct answer is **Rhinosporidiosis** because it is a chronic granulomatous disease caused by *Rhinosporidium seeberi* that typically presents as a **friable, leafy, strawberry-like polypoid mass** arising from the nasal septum or turbinates. Crucially, Rhinosporidiosis is characterized by tissue proliferation rather than destruction; it does not cause necrosis or perforation of the septal cartilage. **Analysis of other options:** * **Syphilis:** Tertiary syphilis is a classic cause of septal perforation. It typically involves the **bony part** of the septum (unlike tuberculosis, which affects the cartilaginous part). * **Trauma:** This is the most common cause of septal perforation. It includes surgical trauma (post-SMR or Septoplasty), digital trauma (nose picking leading to "ulcer-perforation" cycle), or accidental injury. * **Septal Abscess:** An abscess leads to the collection of pus between the perichondrium and cartilage. This cuts off the blood supply to the avascular septal cartilage, leading to rapid **necrosis** and subsequent perforation. **Clinical Pearls for NEET-PG:** * **Most common site of perforation:** Anterior cartilaginous septum (Little’s area). * **Wegener’s Granulomatosis:** A high-yield systemic cause of "saddle nose" deformity and septal perforation. * **Cocaine Abuse:** Causes chronic vasoconstriction leading to ischemic necrosis of the septal cartilage. * **Occupational exposure:** Chrome workers (chromic acid fumes) are at high risk for painless septal perforations.

Q: What is the most common malignancy found in the maxillary sinus?

Squamous cell carcinoma. **Explanation:** **1. Why Squamous Cell Carcinoma (SCC) is correct:** Squamous cell carcinoma is the most common malignancy of the paranasal sinuses, accounting for approximately **80% of all cases**. Within the paranasal sinuses, the **maxillary sinus** is the most frequently involved site (about 70%). The Schneiderian membrane (pseudostratified ciliated columnar epithelium) lining the sinus undergoes squamous metaplasia due to chronic irritation or environmental triggers, eventually progressing to SCC. **2. Why other options are incorrect:** * **Adenoid Cystic Carcinoma:** This is the second most common malignancy of the maxillary sinus. It is known for its **perineural invasion** and "skip lesions," but it is significantly less frequent than SCC. * **Adenocarcinoma:** This is more commonly associated with the **ethmoid sinuses**, particularly in individuals with occupational exposure to **wood dust**. * **Mucoepidermoid Carcinoma:** While it is the most common malignant tumor of the salivary glands, it is a rare primary finding in the paranasal sinuses. **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 due to early involvement of the skull base and orbit. * **Clinical Presentation:** Most patients present with "cheek swelling" or "unilateral nasal obstruction." A high-yield sign is **loosening of upper molar teeth** or ill-fitting dentures, indicating erosion of the floor of the sinus (alveolar process). * **Staging:** The T-staging of maxillary sinus tumors is unique as it relies heavily on the involvement of specific bony walls (e.g., Infrastructure vs. Suprastructure).

Q: Nasal septum perforation occurs in all of the following except?

Rhinosporidiosis. **Explanation:** Nasal septal perforation occurs when there is a full-thickness defect in the cartilaginous or bony septum, leading to communication between the two nasal cavities. **Why Rhinosporidiosis is the correct answer:** Rhinosporidiosis, caused by *Rhinosporidium seeberi*, typically presents as a **friable, leafy, strawberry-like polypoid mass** that is highly vascular and bleeds on touch. It primarily affects the mucous membrane of the septum or lateral wall but is characterized by **exophytic growth** rather than tissue destruction or necrosis. Therefore, it does **not** cause septal perforation. **Analysis of other options:** * **Tuberculosis:** Chronic granulomatous infections like TB cause "cold" necrosis of the tissue. It typically involves the **cartilaginous part** of the septum, leading to perforation. * **Nasal Surgery:** This is the **most common cause** of septal perforation (iatrogenic). It occurs during procedures like SMR (Submucous Resection) or Septoplasty if bilateral mucosal flaps are torn at corresponding points. * **Syphilis:** Tertiary syphilis (gumma) is a classic cause of septal perforation. Unlike TB, it characteristically involves the **bony septum** (vomer). **High-Yield Clinical Pearls for NEET-PG:** * **Most common site of perforation:** Anterior cartilaginous septum (Kiesselbach’s area). * **Syphilis vs. TB:** Syphilis affects the **bone**; Tuberculosis affects the **cartilage**. * **Wegener’s Granulomatosis:** Another high-yield cause of septal perforation and "saddle nose" deformity. * **Occupational causes:** Chronic exposure to chromium salts, arsenic, and cocaine snorting. * **Symptoms:** Small perforations often cause **whistling sounds** during breathing, while large ones cause crusting and epistaxis.

Q: The Killian term is used for which of the following polyps?

Antrochoanal polyp. **Explanation:** The correct answer is **Antrochoanal polyp**. **Why it is correct:** An Antrochoanal polyp (ACP) is also known as **Killian’s polyp**. It originates from the mucosa of the maxillary antrum (near the accessory ostium), passes through the natural or accessory ostium into the middle meatus, and extends posteriorly into the choana and nasopharynx. It is typically unilateral and seen more commonly in children and young adults. The term "Killian" is associated with this polyp because it traverses the ostium described by Gustav Killian. **Why the other options are wrong:** * **Ethmoidal polyp:** These are usually bilateral, multiple, and associated with allergies or chronic rhinosinusitis. They arise from the ethmoidal air cells and are not referred to as Killian polyps. * **Tonsillar cyst/Tonsillolith:** These are conditions of the oropharynx. A tonsillar cyst is a retention cyst of the tonsillar mucosa, and a tonsillolith is a calcareous concretion (stone) within a tonsillar crypt. Neither is related to nasal polyposis or the term Killian. **High-Yield Clinical Pearls for NEET-PG:** * **Components of ACP:** It has three parts—Antral (cystic), Nasal (soft), and Choanal (bulbous). * **Radiology:** On a CT scan, it shows an opaque maxillary sinus with a soft tissue mass extending into the choana. * **Management:** The treatment of choice is **FESS (Functional Endoscopic Sinus Surgery)** to remove the polyp and its antral attachment to prevent recurrence. * **Differential Diagnosis:** In a young male with a nasopharyngeal mass, always rule out Juvenile Nasopharyngeal Angiofibroma (JNA). * **Killian’s Dehiscence:** Do not confuse Killian’s polyp with Killian’s dehiscence, which is a weak area in the Pharyngeal Constrictor muscle (between thyropharyngeus and cricopharyngeus) where Zenker’s diverticulum occurs.

Q: Maxillary sinusitis due to viral etiology is:

Self limiting.. **Explanation:** **1. Why "Self-limiting" is correct:** Most cases of acute rhinosinusitis are viral in origin (commonly caused by Rhinoviruses, Influenza, or Parainfluenza). Viral maxillary sinusitis is a **self-limiting** condition, meaning it typically resolves on its own within 7 to 10 days without the need for antibiotic intervention. Management is primarily supportive, focusing on symptomatic relief through hydration, analgesics, and topical decongestants. **2. Why other options are incorrect:** * **Option A:** Bacterial sinusitis is suspected only if symptoms persist beyond 10 days, are severe (high fever >39°C), or show "double worsening" (getting better then suddenly worse). Treating viral cases as bacterial leads to unnecessary antibiotic resistance. * **Option C:** Viral sinusitis is generally **milder** than bacterial sinusitis. Bacterial infections (often *S. pneumoniae* or *H. influenzae*) are associated with more intense localized pain, purulent nasal discharge, and higher systemic toxicity. * **Option D:** Since A and C are incorrect, "All of the above" is invalid. **High-Yield Clinical Pearls for NEET-PG:** * **Most common sinus involved:** Maxillary sinus (in adults); Ethmoid sinus (in children). * **First-line treatment for Acute Bacterial Sinusitis:** Amoxicillin-Clavulanate (Augmentin). * **Radiology of choice:** CT Scan of Paranasal Sinuses (PNS) is the gold standard, though often not required for simple viral cases. * **Waters' View (X-ray):** Best for visualizing the maxillary sinus; look for an air-fluid level or opacification. * **Pott’s Puffy Tumor:** A rare but high-yield complication involving frontal bone osteomyelitis and forehead swelling.

Question 1

A 35-year-old male presented with nasal discharge, facial pain, and fever, which subsided with a course of antibiotics and antihistamines but recurred again after 2 months. On examination, there was mucopurulent discharge from the middle meatus and inflamed sinus openings. What is the investigation of choice?

Accepted Answer

NCCT PNS

Answer

X-ray PNS

Answer

MRI of the face

Answer

Inferior meatal puncture

Question 2

What is the most common intracranial complication of chronic sinusitis?

Accepted Answer

Subdural abscess

Answer

Brain abscess

Answer

Meningitis

Answer

Cavernous sinus thrombosis

Question 3

Which of the following are complications of acute sinusitis?

Accepted Answer

Subdural abscess

Answer

Orbital cellulitis

Answer

Pott's puffy tumour

Answer

Conjunctival chemosis

Question 4

A child has a retained disc battery in the nose. What is the most important consideration in the management?

Accepted Answer

The battery substance can leak and cause tissue damage.

Answer

It can lead to tetanus.

Answer

Refer the child to a specialist for removal of the battery.

Answer

Instill nasal drops.

Question 5

Which of the following conditions does not lead to septal perforation?

Accepted Answer

Rhinosporidiosis

Answer

Syphilis

Answer

Trauma

Answer

Septal Abscess

Question 6

What is the most common malignancy found in the maxillary sinus?

Accepted Answer

Squamous cell carcinoma

Answer

Mucoepidermoid carcinoma

Answer

Adenoid cystic carcinoma

Answer

Adenocarcinoma

Question 7

Nasal septum perforation occurs in all of the following except?

Accepted Answer

Rhinosporidiosis

Answer

Tuberculosis

Answer

Nasal surgery

Answer

Syphilis

Question 8

What is the most common cause of epistaxis in children?

Accepted Answer

Habitual nose picking

Answer

Common cold

Answer

Nasal allergy

Answer

Polyp

Question 9

The Killian term is used for which of the following polyps?

Accepted Answer

Antrochoanal polyp

Answer

Ethmoidal polyp

Answer

Tonsillar cyst

Answer

Tonsillolith

Question 10

Maxillary sinusitis due to viral etiology is:

Accepted Answer

Self limiting.

Answer

Treated as bacterial sinusitis only.

Answer

More severe than bacterial sinusitis.

Answer

All of the above.

Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses — MCQs

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