Diseases of the Nose and Paranasal Sinuses Practice Questions

Q: What is the most common cause of obstruction in atrophic rhinitis?

Excessive formation of crust. **Explanation:** **Atrophic Rhinitis (Ozena)** is a chronic inflammatory condition characterized by the atrophy of the nasal mucosa and the underlying turbinate bones. **Why Option A is Correct:** The hallmark of atrophic rhinitis is the replacement of normal ciliated columnar epithelium with squamous epithelium (squamous metaplasia). This leads to a loss of goblet cells and mucociliary clearance. Consequently, the nasal secretions become thick, viscid, and dry up rapidly, forming **large, foul-smelling greenish-black crusts**. Despite the nasal cavity being pathologically roomy (due to turbinate atrophy), these extensive crusts physically block the airway, making **excessive crust formation** the most common cause of nasal obstruction in these patients. **Why the Other Options are Incorrect:** * **B. Polyp:** Nasal polyps are associated with chronic rhinosinusitis or aspirin sensitivity, not the atrophic processes of Ozena. * **C. Synechiae:** These are adhesions between the septum and turbinates, usually occurring post-surgically. While they cause obstruction, they are not a primary feature of atrophic rhinitis. * **D. Hypertrophy of turbinate:** This is the physiological opposite of atrophic rhinitis. In this disease, the turbinates undergo **atrophy**, leading to a "roomy" nose. **High-Yield Clinical Pearls for NEET-PG:** * **Paradoxical Nasal Obstruction:** Patients complain of a blocked nose despite a wide nasal cavity because the sensory nerve endings atrophy, leading to a loss of the sensation of airflow. * **Merciful Anosmia:** The patient cannot smell their own foul odor (due to atrophy of the olfactory epithelium), though it is offensive to others. * **Organism:** *Klebsiella ozaenae* (Abel’s bacillus) is frequently isolated. * **Surgery:** **Young’s operation** (or Modified Young’s) involves closing the nostrils to allow the mucosa to heal.

Q: For a deviated nasal septum, surgery is indicated for:

All of the above. **Explanation:** A Deviated Nasal Septum (DNS) is a physical deformity that requires surgical intervention (Septoplasty or SMR) only when it becomes symptomatic or interferes with sinus drainage. **Why "All of the above" is correct:** * **Septal spur with epistaxis:** A sharp bony projection (spur) can stretch the overlying mucosa, making it thin and prone to drying. This leads to crusting and recurrent bleeding (epistaxis) from the vessels of the septum. Surgery is required to remove the spur and stop the bleeding. * **Marked septal deviation:** Severe deviation causes mechanical nasal obstruction, leading to mouth breathing, snoring, and compensatory hypertrophy of the opposite inferior turbinate. * **Persistent rhinorrhea:** DNS can cause chronic irritation of the nasal mucosa or obstruct the natural ostia of the paranasal sinuses. This leads to stasis of secretions, chronic sinusitis, and persistent post-nasal drip or rhinorrhea. **Analysis of Options:** While "Marked deviation" is the most common reason for surgery, the presence of complications like epistaxis and chronic discharge (rhinorrhea) are definitive clinical indications. Therefore, all listed conditions warrant surgical correction. **High-Yield Clinical Pearls for NEET-PG:** * **Choice of Surgery:** **Septoplasty** is the treatment of choice (conservative, preserves flap). **SMR (Submucous Resection)** is generally avoided in patients below 17 years to prevent saddle nose deformity. * **Cottle’s Test:** Used to clinicaly confirm if the nasal obstruction is due to a septal/valve issue (positive if breathing improves when the cheek is pulled laterally). * **Sluder’s Neuralgia:** A DNS hitting the lateral nasal wall can cause referred facial pain/headache due to pressure on the anterior ethmoidal nerve.

Q: Which of the following is NOT true about antrochoanal polyp?

Best examined with anterior rhinoscopy. **Explanation:** An **Antrochoanal Polyp (Killian’s Polyp)** originates from the mucosa of the maxillary antrum, passes through the accessory ostium, and extends posteriorly into the choana and nasopharynx. **Why Option A is the Correct Answer (The False Statement):** Antrochoanal polyps grow **backwards** toward the choana and nasopharynx. Because of this posterior direction, they are often missed or poorly visualized on **anterior rhinoscopy**, which primarily shows the anterior nasal cavity. The gold standard for clinical examination is **posterior rhinoscopy** (using a mirror) or **diagnostic nasal endoscopy**, which allows visualization of the polyp hanging in the choana. **Analysis of Other Options:** * **B. Less recurrence rate:** Unlike ethmoidal polyps (which are multiple and allergy-linked), antrochoanal polyps are solitary and inflammatory. If the intramural (antral) part is completely removed (e.g., via FESS), the recurrence rate is significantly lower. * **C. Seen in young individuals:** These polyps are most commonly diagnosed in children and young adults, whereas ethmoidal polyps are more common in adults. * **D. Usually unilateral:** Antrochoanal polyps are characteristically solitary and unilateral. Bilateral presentation is extremely rare. **High-Yield Clinical Pearls for NEET-PG:** * **Radiology:** On X-ray (Water’s view), it shows opacification of the involved maxillary sinus. * **Management:** The treatment of choice is **Functional Endoscopic Sinus Surgery (FESS)**. In recurrent cases or very young children, a Caldwell-Luc operation was historically used but is now largely avoided due to risks to permanent teeth buds. * **Differentiating Feature:** Unlike ethmoidal polyps, antrochoanal polyps are **not** associated with asthma or aspirin sensitivity.

Q: Which of the following is NOT a component of an alkaline nasal douch solution?

Glucose. **Explanation:** Alkaline nasal douching is a therapeutic procedure primarily used to maintain nasal hygiene in conditions characterized by excessive crusting, such as **Atrophic Rhinitis** (Ozaena) or post-sinus surgery. The goal is to dissolve thick, tenacious secretions and crusts while inhibiting the growth of anaerobic organisms. **Why Glucose is the Correct Answer:** Glucose is **not** a component of the standard alkaline douching solution. While glucose (specifically 25% glucose in glycerin) is used topically in Atrophic Rhinitis, it is applied as **nasal drops** to inhibit the growth of proteolytic organisms (like *Klebsiella ozaenae*) and reduce the foul smell (foetor). It is not part of the irrigation/douche powder. **Analysis of Other Options:** The standard alkaline douche powder (often referred to as "Birmingham Nasal Douche" or similar formulations) consists of: * **Sodium chloride (NaCl):** Used to make the solution isotonic or slightly hypertonic, helping to draw out fluid and soften crusts. * **Sodium bicarbonate (NaHCO3):** Helps in dissolving the thick mucus (mucolytic action) by increasing the pH. * **Sodium biborate (Borax):** Acts as a mild antiseptic and helps in maintaining the alkaline medium. **NEET-PG High-Yield Pearls:** * **Mixing Ratio:** The standard ratio for these three salts is **1:1:2** (Sodium chloride : Sodium bicarbonate : Sodium biborate). * **Administration:** One teaspoon of this powder is dissolved in approximately 250–300 ml of lukewarm water. * **Clinical Indication:** Atrophic Rhinitis is the classic indication. Look for the triad of **foul smell (foetor), crusting, and roominess** in the nasal cavity. * **Contraindication:** Patients should be advised not to swallow the solution or perform forceful blowing immediately after douching to prevent Eustachian tube contamination.

Q: Rhinoscleroma occurs due to which of the following?

Klebsiella rhinoscleromatis infection. **Explanation:** **Rhinoscleroma** is a chronic, progressive granulomatous disease of the upper respiratory tract, primarily affecting the nasal cavity. 1. **Why Option B is correct:** The disease is caused by **Klebsiella rhinoscleromatis** (also known as the Frisch bacillus), a Gram-negative, encapsulated coccobacillus. It is endemic in parts of India, Egypt, and Central America. The infection typically progresses through three clinical stages: Catarrhal (atrophic), Proliferative (granulomatous), and Cicatricial (fibrotic). 2. **Why other options are incorrect:** * **Option A & C:** While the disease involves a chronic inflammatory response, it is fundamentally an **infectious** process, not primarily autoimmune or idiopathic inflammatory. * **Option D:** Mycotic (fungal) infections like Rhinosporidiosis present differently (leafy, friable masses) and are caused by organisms like *Rhinosporidium seeberi*, not bacteria. **High-Yield Clinical Pearls for NEET-PG:** * **Pathognomonic Histology:** Look for **Mikulicz cells** (large foamy macrophages containing the bacilli) and **Russell bodies** (eosinophilic hyaline bodies representing degenerated plasma cells). * **Clinical Sign:** The "Hebra Nose" or "Tapir Nose" appearance occurs due to expansion and deformity of the external nose during the proliferative stage. * **Key Feature:** Unlike many other granulomatous diseases, Rhinoscleroma is **painless** and characteristically **does not cause epistaxis**. * **Treatment:** Long-term antibiotics (Streptomycin and Tetracycline are traditional; Ciprofloxacin is also effective) often combined with surgical debridement.

Q: A female patient presents with a long-standing nasal obstruction and friends have commented on a foul smell emanating from her nose, which she herself cannot perceive. Atrophic rhinitis is diagnosed. What is a possible etiology for secondary atrophic rhinitis in this patient?

Chronic sinusitis. **Explanation:** Atrophic rhinitis is a chronic nasal condition characterized by atrophy of the nasal mucosa and turbinates. It is classified into **Primary** (idiopathic) and **Secondary** forms. **Why Chronic Sinusitis is Correct:** Secondary atrophic rhinitis occurs due to specific underlying diseases or interventions that damage the ciliated epithelium and mucous glands. **Chronic sinusitis** is a leading cause because the persistent purulent discharge leads to chronic inflammation, which eventually destroys the nasal mucosa and the underlying bone, resulting in the characteristic "roomy" nasal cavity filled with foul-smelling crusts. **Analysis of Incorrect Options:** * **Nasal trauma:** While severe trauma or extensive nasal surgery (like total turbinectomy, known as "Empty Nose Syndrome") can cause secondary atrophic rhinitis, chronic infection (sinusitis) is a more classic etiologic association in the context of secondary disease processes. * **Oropharyngeal cancer:** This does not directly affect the nasal physiology or mucosa to cause atrophy. However, *radiation therapy* for nasopharyngeal (not oropharyngeal) tumors is a known cause. * **Strong hereditary factors:** This is a characteristic of **Primary Atrophic Rhinitis**, not the secondary form. Primary disease is also associated with organisms like *Klebsiella ozaenae*. **Clinical Pearls for NEET-PG:** * **Merciful Anosmia:** The patient cannot smell the foul odor (Ozaena) because the olfactory epithelium has atrophied, though others can perceive it. * **Perez’s Sign:** The characteristic foul-smelling discharge/crusts. * **Treatment:** Conservative management includes **nasal douching** (with alkaline solution) and **glucose in glycerin** drops (to inhibit proteolytic organisms). * **Surgical Management:** **Young’s operation** or Modified Young’s operation (closing the nostrils to allow the mucosa to recover).

Q: Optic nerve injury following sinus surgery is most commonly due to injury of which ethmoidal cells?

Onodi cells. **Explanation:** The correct answer is **Onodi cells** (also known as sphenoethmoidal cells). **1. Why Onodi cells are correct:** Onodi cells are the most posterior ethmoid air cells that pneumatize laterally and superiorly into the sphenoid sinus. Their clinical significance lies in their intimate anatomical relationship with the **optic nerve** and the **internal carotid artery**. During Functional Endoscopic Sinus Surgery (FESS), if a surgeon mistakes an Onodi cell for the sphenoid sinus, they may inadvertently injure the optic nerve which often runs along the lateral wall of this cell, sometimes with a dehiscent bony covering. This makes it the most common site for iatrogenic optic nerve injury. **2. Why other options are incorrect:** * **Haller cells (Infraorbital ethmoid cells):** These are ethmoid cells that pneumatize into the floor of the orbit/maxillary sinus roof. They are associated with narrowing of the maxillary ostium and sinusitis, but not typically optic nerve injury. * **Agger nasi cells:** These are the most anterior ethmoid cells, located anterior to the attachment of the middle turbinate. They are landmarks for reaching the frontal recess. * **Ethmoidal bullae:** This is the largest and most constant cell of the anterior ethmoid system. It forms the posterior boundary of the hiatus semilunaris but is far removed from the optic nerve. **Clinical Pearls for NEET-PG:** * **Onodi Cell:** Key landmark for the Optic Nerve. * **Haller Cell:** Key landmark for the Maxillary Sinus/Orbital floor. * **Agger Nasi:** Key landmark for the Frontal Sinus. * **Mnemonic:** **O**nodi = **O**ptic Nerve. * Pre-operative CT scans are mandatory in FESS to identify these anatomical variants and prevent "blindness" as a surgical complication.

Question 1

What is the most common cause of obstruction in atrophic rhinitis?

Accepted Answer

Excessive formation of crust

Answer

Polyp

Answer

Synechiae

Answer

Hypertrophy of turbinate

Question 2

For a deviated nasal septum, surgery is indicated for:

Accepted Answer

All of the above

Answer

Septal spur with epistaxis

Answer

Marked septal deviation

Answer

Persistent rhinorrhea

Question 3

Which of the following is NOT true about antrochoanal polyp?

Accepted Answer

Best examined with anterior rhinoscopy

Answer

Less recurrence rate

Answer

Seen in young individuals

Answer

Usually unilateral

Question 4

All are true about epistaxis except:

Accepted Answer

Anterior nasal packing is easy to insert and less traumatic than balloon tamponade.

Answer

Kiesselbach's plexus is the source in 90% of cases.

Answer

If anterior packing is left in the nose for more than 48 hours, antibiotic coverage is given.

Answer

Trotter's method is a first aid method.

Question 5

In case of uncontrolled epistaxis, ligation of the internal maxillary artery is to be performed in which location?

Accepted Answer

Pterygopalatine fossa

Answer

Maxillary antrum

Answer

At the neck

Answer

Medial wall of the orbit

Question 6

Which of the following is NOT a component of an alkaline nasal douch solution?

Accepted Answer

Glucose

Answer

Sodium chloride (NaCl)

Answer

Sodium biborate

Answer

Sodium bicarbonate (NaHCO3)

Question 7

During the extraction of an upper first molar, the mesiobuccal root is missing and suspected to have been pushed into the maxillary sinus. What is the recommended method to determine antral perforation?

Accepted Answer

Attempt to blow air through the nose with the nostrils closed.

Answer

Probe the socket to check for perforation.

Answer

Enlarge the socket to retrieve the root fragment.

Answer

All of the above.

Question 8

Rhinoscleroma occurs due to which of the following?

Accepted Answer

Klebsiella rhinoscleromatis infection

Answer

Autoimmune cause

Answer

Inflammatory cause

Answer

Mycotic infection

Question 9

A female patient presents with a long-standing nasal obstruction and friends have commented on a foul smell emanating from her nose, which she herself cannot perceive. Atrophic rhinitis is diagnosed. What is a possible etiology for secondary atrophic rhinitis in this patient?

Accepted Answer

Chronic sinusitis

Answer

Nasal trauma

Answer

Oropharyngeal cancer

Answer

Strong hereditary factors

Question 10

Optic nerve injury following sinus surgery is most commonly due to injury of which ethmoidal cells?

Accepted Answer

Onodi cells

Answer

Haller cells

Answer

Agger nasi cells

Answer

Ethmoidal bullae cells

Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses — MCQs

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