Diseases of the Nose and Paranasal Sinuses Practice Questions

Q: Which of the following is not a feature of rhinosporidiosis?

Russell bodies are seen. **Explanation:** Rhinosporidiosis is a chronic granulomatous infection caused by *Rhinosporidium seeberi* (now classified as a Mesomycetozoan parasite). It primarily affects the nasal mucosa, presenting as a leafy, friable, strawberry-like vascular mass. **Why "Russell bodies are seen" is the correct (incorrect feature) answer:** Russell bodies are eosinophilic, large immunoglobulin-containing inclusions found in plasma cells, typically associated with chronic inflammation (e.g., Rhinoscleroma). They are **not** a feature of Rhinosporidiosis. The characteristic histopathological hallmark of Rhinosporidiosis is the presence of numerous **sporangia** in various stages of development, containing thousands of **endospores**. **Analysis of other options:** * **Option A (Oral dapsone):** Dapsone is used as an adjunct to surgery. It inhibits the maturation of sporangia and arrests the growth of the organism, thereby reducing the high recurrence rate. * **Option B (Excision with knife):** Wide surgical excision is the primary treatment. However, it must be performed with **cauterization of the base** (using diathermy) to prevent seeding of endospores and recurrence. * **Option C (Bleeding polyp):** Due to its extreme vascularity, the lesion is often referred to as a "bleeding polyp of the nose." Epistaxis is a common presenting symptom. **High-Yield Clinical Pearls for NEET-PG:** * **Epidemiology:** Most common in South India (Tamil Nadu, Kerala) and Sri Lanka; associated with bathing in stagnant pond water. * **Pathology:** Look for "Strawberry appearance" (white dots on a red mass representing mature sporangia). * **Staining:** Sporangia stain well with GMS, PAS, and Mucicarmine. * **Key Distinction:** Rhinoscleroma = Mikulicz cells & Russell bodies; Rhinosporidiosis = Sporangia & Endospores.

Q: What are the potential complications of acute sinusitis?

All of the above. Acute sinusitis can lead to serious complications due to the close anatomical proximity of the paranasal sinuses to the orbit and the cranial cavity. These complications are generally categorized into **Orbital, Intracranial, and Bony** types. ### **Explanation of Options:** * **Orbital Cellulitis (Option A):** This is the most common complication of acute sinusitis (especially ethmoiditis). Infection spreads via the thin lamina papyracea or through retrograde thrombophlebitis of the ophthalmic veins. It is part of the Chandler Classification of orbital infections. * **Pott’s Puffy Tumor (Option B):** This is a classic complication of **acute frontal sinusitis**. It represents osteomyelitis of the frontal bone, presenting as a localized, doughy, fluctuant swelling on the forehead. * **Conjunctival Chemosis (Option C):** This refers to edema of the conjunctiva. It is a clinical sign often seen in orbital complications (like orbital cellulitis) or as an early sign of **Cavernous Sinus Thrombosis**, where venous congestion leads to swelling. Since all three are recognized sequelae of sinus infections, **Option D (All of the above)** is correct. ### **High-Yield Clinical Pearls for NEET-PG:** * **Most common complication of sinusitis:** Orbital complications (specifically Preseptal/Orbital cellulitis). * **Most common sinus involved in orbital complications:** Ethmoid sinus (due to the thin lamina papyracea). * **Most common sinus involved in intracranial complications:** Frontal sinus. * **Chandler’s Classification:** Essential for exams. It stages orbital spread from Preseptal Cellulitis (Stage I) to Cavernous Sinus Thrombosis (Stage V). * **Red Flags:** Proptosis, ophthalmoplegia (restricted eye movement), and decreased visual acuity indicate a progression from preseptal to true orbital involvement, requiring urgent intervention.

Q: Which of the following is NOT a bone of the quadrilateral cartilage?

Sphenoid. The nasal septum is a composite structure consisting of both bony and cartilaginous components. The **quadrilateral cartilage** (also known as the septal cartilage) forms the anterior-inferior part of the septum. ### Explanation of the Correct Answer The **Sphenoid bone (Option C)** is the correct answer because it does not directly articulate with or form a boundary for the quadrilateral cartilage. While the sphenoid bone is part of the posterior nasal cavity (forming the roof and the sphenoid rostrum), it is separated from the quadrilateral cartilage by the vomer and the perpendicular plate of the ethmoid. ### Analysis of Incorrect Options The quadrilateral cartilage is "quadrilateral" because it has four borders that articulate with the following structures: * **Ethmoid (Option A):** Specifically, the **perpendicular plate of the ethmoid** forms the posterosuperior border of the cartilage. * **Vomer (Option B):** This bone forms the posteroinferior border of the cartilage. * **Maxilla (Option D):** The **nasal crest of the maxilla** and the **anterior nasal spine** form the inferior support for the cartilage. ### NEET-PG High-Yield Clinical Pearls * **Little’s Area (Kiesselbach's Plexus):** Located on the anteroinferior part of the quadrilateral cartilage; it is the most common site for epistaxis. * **Septal Abscess:** Usually occurs due to an infected septal hematoma. Since the quadrilateral cartilage receives its nutrition from the overlying perichondrium, an abscess can lead to **necrosis**, resulting in a **Saddle Nose Deformity**. * **Killian's Incision:** The standard incision used in Submucous Resection (SMR) of the septum, made 5mm proximal to the caudal border of the quadrilateral cartilage.

Q: Which of the following statements is NOT true about angiofibroma?

Arises from the fossa of Rosenmüller. **Explanation:** **1. Why Option A is the Correct Answer (False Statement):** Juvenile Nasopharyngeal Angiofibroma (JNA) does **not** arise from the fossa of Rosenmüller. Its site of origin is the **sphenopalatine foramen**, specifically at the junction where the sphenoid process of the palatine bone meets the pterygoid process of the sphenoid bone. The fossa of Rosenmüller is the most common site of origin for *Nasopharyngeal Carcinoma*, not angiofibroma. **2. Analysis of Other Options:** * **Option B:** JNA is a benign but locally aggressive, **sessile** tumor. Staging systems like **Sessions** and **Fisch** are common, but the **Radkowski** classification (a modification of Sessions) is widely used to assess the extent of spread, especially into the infratemporal fossa. * **Option C:** As the tumor grows, it can expand into the ethmoid sinuses and orbit, causing lateral displacement of the eyes and widening of the nasal bridge. This characteristic clinical appearance is known as **"Frog Face Deformity."** * **Option D:** JNA is a highly vascular tumor composed of thin-walled vessels lacking a muscular coat. **Biopsy is strictly contraindicated** in an office setting due to the risk of profuse, life-threatening hemorrhage. Diagnosis is primarily clinical and radiological. **Clinical Pearls for NEET-PG:** * **Demographics:** Almost exclusively seen in **adolescent males** (testosterone dependent). * **Classic Triad:** Adolescent male + Profuse recurrent epistaxis + Nasal obstruction. * **Radiology:** **Holman-Miller sign** (antral sign) is pathognomonic (anterior bowing of the posterior wall of the maxilla). * **Treatment of Choice:** Surgical excision (usually preceded by preoperative embolization to reduce blood loss).

Q: Which of the following is a true statement about Rhinosporidiosis?

It presents as a nasal polyp.. **Explanation:** **Rhinosporidiosis** is a chronic granulomatous infection caused by *Rhinosporidium seeberi*. While previously thought to be a fungus, it is now classified as an aquatic protist (Mesomycetozoea). 1. **Why Option C is Correct:** The hallmark clinical presentation is a **leafy, polypoid, friable mass** in the nasal cavity. It is typically vascular, bleeding easily on touch (epistaxis), and has a characteristic **"strawberry" appearance** due to the presence of mature sporangia visible as white dots on the surface. 2. **Why Options A, B, and D are Incorrect:** * **Option A:** *Klebsiella rhinoscleromatis* causes **Rhinoscleroma**, not Rhinosporidiosis. Rhinoscleroma is characterized by woody hard swelling and Mikulicz cells. * **Option B:** Rhinosporidiosis is typically seen in **immunocompetent** individuals. It is an endemic infection (common in South India and Sri Lanka) associated with bathing in stagnant water or ponds. * **Option D:** *Rhinosporidium seeberi* **cannot be cultured** in vitro (artificial media). Diagnosis relies on histopathology showing large, thick-walled **sporangia** containing thousands of endospores. **High-Yield NEET-PG Pearls:** * **Site:** Most common site is the **Nasal Septum** (followed by the nasopharynx). * **Histology:** Large sporangia (up to 350 μm) stained with H&E, GMS, or PAS. * **Treatment of Choice:** Wide surgical excision with **cauterization of the base** to prevent recurrence. Medical therapy (Dapsone) is sometimes used as an adjunct but is not definitive.

Q: What does Bernoulli's theorem explain in the context of laryngeal function?

Nasal polyp. **Explanation:** **Bernoulli’s Theorem** states that in a flowing fluid (or air), an increase in velocity occurs simultaneously with a decrease in pressure. In the context of ENT, this principle is the primary physical explanation for the formation and growth of **Nasal Polyps**. 1. **Why Nasal Polyp is correct:** According to the Bernoulli principle, as air passes through the narrow nasal passages, its velocity increases, creating a negative pressure (suction effect) on the mucosa. In the presence of chronic inflammation or edema, this negative pressure pulls the loosened mucosal lining outward, leading to the formation and progressive enlargement of a polypoid mass. 2. **Why other options are incorrect:** * **Thyroglossal Cyst:** This is a congenital developmental abnormality resulting from the failure of the thyroglossal duct to obliterate. * **Zenker’s Diverticulum:** This is a pulsion diverticulum caused by high intrapharyngeal pressure and incoordination of the cricopharyngeus muscle (Killian’s dehiscence). * **Laryngomalacia:** This is caused by congenital flaccidity of the supraglottic structures (aryepiglottic folds), leading to inspiratory stridor. While airflow dynamics are involved, the primary pathology is structural weakness, not Bernoulli’s principle. **High-Yield Clinical Pearls for NEET-PG:** * **Bernoulli’s Principle in Larynx:** It also explains the **vocal fold vibration** (Myoelastic-Aerodynamic Theory). As air rushes through the glottis, the drop in pressure sucks the vocal cords together. * **Nasal Polyps:** Most commonly arise from the **Ethmoidal sinuses** (middle meatus). * **Samter’s Triad:** Aspirin sensitivity, Asthma, and Nasal Polyposis. * **Vocal Nodules:** Also influenced by Bernoulli's effect, as the constant suction and high-velocity airflow contribute to mucosal trauma at the junction of the anterior 1/3 and posterior 2/3 of the vocal cords.

Question 1

Which of the following is not a feature of rhinosporidiosis?

Accepted Answer

Russell bodies are seen

Answer

Oral dapsone is useful in treatment

Answer

Excision with the knife is the treatment

Answer

Bleeding polyp

Question 2

A 40-year-old male patient presents with a painless swelling causing fullness of the upper lip and elevation of the nostril on the left side. The only positive radiographic finding is unilateral elevation of the floor of the nasal cavity. What is the probable diagnosis?

Accepted Answer

Nasolabial cyst

Answer

Globulomaxillary cyst

Answer

Polyp in the nasal cavity

Answer

Radicular cyst

Question 3

A 39-year-old woman presents with a 6-month history of headache, facial pressure, nasal obstruction with discharge, and diminished taste sensation. Physical examination reveals discomfort on palpation over her left maxillary sinus. Rhinoscopy shows nasal erythema, marked edema, and purulent discharge. Which of the following complications is most likely to occur in this patient?

Accepted Answer

Osteomyelitis

Answer

Mucocele

Answer

Nasopharyngeal carcinoma

Answer

Sinonasal papilloma

Question 4

What are the potential complications of acute sinusitis?

Accepted Answer

All of the above

Answer

Orbital cellulitis

Answer

Pott's puffy tumor

Answer

Conjunctival chemosis

Question 5

Which of the following is NOT a bone of the quadrilateral cartilage?

Accepted Answer

Sphenoid

Answer

Ethmoid

Answer

Vomer

Answer

Maxilla

Question 6

Which of the following statements is NOT true about angiofibroma?

Accepted Answer

Arises from the fossa of Rosenmüller

Answer

Sessile and Radowski classification is used

Answer

Causes frog face deformity

Answer

Biopsy is contraindicated

Question 7

Which of the following is a true statement about Rhinosporidiosis?

Accepted Answer

It presents as a nasal polyp.

Answer

The most common organism causing it is Klebsiella rhinoscleromatis.

Answer

It is seen only in immunocompromised patients.

Answer

It can be diagnosed by isolation of the organism.

Question 8

Which type of polyp is most commonly associated with recurrence?

Accepted Answer

Ethmoidal polyp

Answer

Antrochoanal polyp

Answer

Nasal polyp

Answer

Hypertrophic turbinate

Question 9

Paroxysmal sneezing on getting up early in the morning from bed is associated with which of the following conditions?

Accepted Answer

Vasomotor rhinitis

Answer

Perineal rhinitis

Answer

Seasonal rhinitis

Answer

Allergic rhinitis

Question 10

What does Bernoulli's theorem explain in the context of laryngeal function?

Accepted Answer

Nasal polyp

Answer

Thyroglossal cyst

Answer

Zenker's diverticulum

Answer

Laryngomalacia

Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses — MCQs

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