Diseases of the Nose and Paranasal Sinuses Practice Questions

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

In 5-10% of cases, it is associated with malignancy. ### 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.

Q: Paranasal sinuses are ventilated during which phase of respiration?

Expiration. **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).

Q: Which of the following statements is true regarding rhinosporidiosis?

Surgery is the primary treatment.. **Explanation:** **Rhinosporidiosis** is a chronic granulomatous infection caused by *Rhinosporidium seeberi*. Although historically classified as a fungus, it is now recognized as an aquatic protistan parasite (Mesomycetozoea). **1. Why Option C is correct:** The primary treatment for rhinosporidiosis is **wide surgical excision** (usually via endonasal or external approach) with **electrocautery of the base**. Cauterization is crucial to prevent recurrence, which is common due to the spillage of endospores during surgery. Medical therapy is generally ineffective, though **Dapsone** is sometimes used as an adjunct to inhibit the maturation of sporangia and reduce recurrence rates. **2. Why other options are incorrect:** * **Option A:** While it presents as a granuloma, *R. seeberi* is **not a fungus**. It is a taxonomically unique eukaryotic pathogen. * **Option B:** Clinically, it presents as a **leafy, polypoidal, strawberry-like mass** that is highly vascular and bleeds easily on touch. It is typically **pinkish-red**, not grayish (grayish masses are more characteristic of ethmoidal polyps). * **Option D:** Radiotherapy has no role in the management of this infectious condition; it is reserved for malignancies. **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. * **Histopathology:** Characterized by numerous **sporangia** in various stages of development, containing thousands of **endospores**. These stain well with GMS, PAS, and Mucicarmine. * **Site:** The **nasal septum** and floor of the nose are the most common sites, but it can affect the conjunctiva (Ocular rhinosporidiosis).

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

Mucoperichondrium is removed. ### 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.

Q: A biopsy taken from a granulomatous lesion of the nose revealed Mikulicz's cells and eosinophilic structures in the cytoplasm of the plasma cells. What is the likely diagnosis?

Rhinoscleroma. **Explanation:** The clinical presentation and histopathological findings described are classic for **Rhinoscleroma**, a chronic granulomatous disease caused by the Gram-negative coccobacillus *Klebsiella pneumoniae subsp. rhinoscleromatis* (Frisch bacillus). **Why Rhinoscleroma is correct:** The diagnosis is confirmed by two pathognomonic histological features: 1. **Mikulicz’s Cells:** Large, foamy histiocytes (macrophages) with vacuolated cytoplasm containing the causative organism. 2. **Russell Bodies:** Eosinophilic, hyaline-like inclusions found in the cytoplasm of plasma cells, representing accumulated immunoglobulin. **Why other options are incorrect:** * **Mucormycosis:** A fungal infection characterized by broad, non-septate hyphae with right-angle branching and extensive angioinvasion leading to necrosis. It does not show Mikulicz’s cells. * **Rhinosporidiosis:** Caused by *Rhinosporidium seeberi*, it presents with friable, strawberry-like nasal masses. Histology shows large, thick-walled **sporangia** containing numerous endospores. * **Nasal Leprosy:** Caused by *Mycobacterium leprae*. While it is a granulomatous disease, it is characterized by acid-fast bacilli (AFB) and, in the lepromatous form, "foamy" Lepra cells, but lacks Russell bodies and the specific Frisch bacillus. **High-Yield Pearls for NEET-PG:** * **Stages of Rhinoscleroma:** Atrophic stage (resembles atrophic rhinitis) → Granulomatous/Proliferative stage (painless nodules) → Cicatricial stage (stenosis and scarring). * **Hebra Nose:** The characteristic external deformity caused by expansion of the nasal framework in the proliferative stage. * **Treatment:** Long-term antibiotics (Streptomycin and Tetracycline are traditional; Ciprofloxacin is now preferred). * **Site:** It most commonly involves the nasal septum and floor but can spread to the nasopharynx and larynx.

Q: Which sinus is least involved in children?

Sphenoid. **Explanation:** The development of paranasal sinuses follows a specific chronological order, which is a high-yield topic for NEET-PG. The correct answer is **Sphenoid** because it is the last sinus to pneumatize and become clinically significant. **1. Why Sphenoid is the Correct Answer:** The sphenoid sinus is absent at birth. It starts to pneumatize around the age of 3–5 years but remains very small throughout early childhood. It only reaches its full size and clinical relevance after puberty (around 12–15 years). Therefore, it is the least involved in pediatric sinusitis. **2. Analysis of Incorrect Options:** * **Ethmoid (A):** This is the **most developed** sinus at birth and is the most common site for sinusitis in infants and young children. * **Maxillary (B):** Present at birth (though small) and rapidly expands during the eruption of deciduous teeth. It is frequently involved in childhood respiratory infections. * **Frontal (C):** Not present at birth. It starts developing from the anterior ethmoid cells around age 2 and is radiologically visible by age 6–7. While it develops late, the sphenoid remains less frequently involved in the early pediatric age group. **Clinical Pearls for NEET-PG:** * **Order of Development:** Ethmoid → Maxillary → Sphenoid → Frontal. * **First to develop (Embryologically):** Maxillary (at 10 weeks gestation). * **Present at birth:** Ethmoid and Maxillary. * **Radiologically visible at birth:** Only Ethmoid. * **Most common sinus involved in children:** Ethmoid. * **Most common sinus involved in adults:** Maxillary.

Q: What is Pott's puffy tumor?

Osteomyelitis of the frontal bone. **Explanation:** **Pott’s Puffy Tumor** is a clinical entity characterized by **subperiosteal abscess** associated with **osteomyelitis of the frontal bone**. It typically occurs as a complication of acute or chronic frontal sinusitis or, less commonly, due to direct head trauma. 1. **Why Option C is correct:** The infection from the frontal sinus spreads to the marrow of the frontal bone (osteomyelitis), leading to bone necrosis. This results in a collection of pus between the bone and the periosteum, manifesting clinically as a soft, fluctuant, "puffy" swelling on the forehead. 2. **Why other options are incorrect:** * **Option A:** Osteosarcoma is a primary malignant bone tumor, not an infectious process. * **Option B:** Adamantinoma (Ameloblastoma) is a benign but locally aggressive odontogenic tumor typically involving the mandible, unrelated to the frontal bone or sinusitis. * **Option D:** While aspergillosis can affect the sinuses, Pott’s Puffy Tumor is specifically defined by bacterial osteomyelitis (often polymicrobial, including anaerobes and Streptococci). **High-Yield Clinical Pearls for NEET-PG:** * **Eponym:** Named after Sir Percivall Pott (1760). * **Clinical Presentation:** Forehead swelling, fever, and headache. * **Complications:** It is a surgical emergency because it can lead to intracranial complications like **epidural abscess**, subdural empyema, or meningitis. * **Diagnosis:** Contrast-enhanced CT (CECT) is the gold standard to visualize bone destruction and intracranial extension. * **Management:** Requires intravenous antibiotics and surgical drainage (often via endoscopic sinus surgery or trephination).

Q: Merciful anosmia is seen in which of the following conditions?

Atrophic rhinitis. **Explanation:** **Atrophic Rhinitis (Ozena)** is the correct answer. The term **"Merciful Anosmia"** refers to a clinical paradox where a patient suffers from a foul-smelling nasal discharge (putrefaction of crusts) that is highly offensive to others, yet the patient themselves cannot smell it. This occurs because the chronic atrophic process destroys the olfactory neuroepithelium and nerve endings, rendering the patient anosmic. It is "merciful" because it spares the patient from their own repulsive odor. **Analysis of Options:** * **Allergic Rhinitis:** Characterized by sneezing, itching, and watery rhinorrhea. While it may cause temporary hyposmia due to mucosal edema, it does not involve the destruction of olfactory nerves or foul-smelling crusts. * **Ethmoidal Polyposis:** These are non-neoplastic masses that cause **conductive anosmia** by physically blocking odors from reaching the olfactory cleft. However, there is no "merciful" component as there is typically no foul odor unless secondary infection occurs. * **Wegener’s Granulomatosis (GPA):** While it causes nasal crusting and septal perforation, it is a systemic vasculitis. While it can lead to anosmia, the specific clinical term "merciful anosmia" is classically reserved for Atrophic Rhinitis. **Clinical Pearls for NEET-PG:** * **Atrophic Rhinitis Triad:** Roomy nasal cavity, foul-smelling crusts (Ozena), and Merciful Anosmia. * **Organism:** *Klebsiella ozaenae* (Abel’s bacillus). * **Surgical Management:** **Young’s operation** or Modified Young’s (closing the nostrils to allow the mucosa to heal). * **Bernoulli’s Phenomenon:** Explains why the nose feels blocked despite being "roomy" (lack of air resistance due to excessive patency).

Question 1

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

Accepted Answer

Inferior meatus

Answer

Superior meatus

Answer

Middle meatus

Answer

Floor of the nose

Question 2

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

Accepted Answer

In 5-10% of cases, it is associated with malignancy

Answer

Arises from the lateral wall of the nose

Answer

Usually unilateral

Answer

Endoscopic endonasal excision is the treatment of choice

Question 3

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?

Accepted Answer

No treatment required

Answer

Caldwell-Luc operation

Answer

Suture

Answer

Antibiotic dressing and secondary healing

Question 4

Paranasal sinuses are ventilated during which phase of respiration?

Accepted Answer

Expiration

Answer

Inspiration

Answer

Mid inspiration

Answer

Deep inspiration

Question 5

Which of the following statements is true regarding rhinosporidiosis?

Accepted Answer

Surgery is the primary treatment.

Answer

It presents as a fungal granuloma.

Answer

It appears as a grayish mass.

Answer

Radiotherapy is the recommended treatment.

Question 6

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

Accepted Answer

Mucoperichondrium is removed

Answer

Indicated in septal deviation

Answer

Preferably done after 16 years of age

Answer

Done in some cases of epistaxis

Question 7

A biopsy taken from a granulomatous lesion of the nose revealed Mikulicz's cells and eosinophilic structures in the cytoplasm of the plasma cells. What is the likely diagnosis?

Accepted Answer

Rhinoscleroma

Answer

Mucormycosis

Answer

Rhinosporidiosis

Answer

Nasal leprosy

Question 8

Which sinus is least involved in children?

Accepted Answer

Sphenoid

Answer

Ethmoid

Answer

Maxillary

Answer

Frontal

Question 9

What is Pott's puffy tumor?

Accepted Answer

Osteomyelitis of the frontal bone

Answer

Osteosarcoma of the frontal bone

Answer

Adamantinoma of the mandible

Answer

Proliferative aspergillosis of the maxillary sinus

Question 10

Merciful anosmia is seen in which of the following conditions?

Accepted Answer

Atrophic rhinitis

Answer

Allergic rhinitis

Answer

Ethmoidal polyposis

Answer

Wegener's granulomatosis

Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses — MCQs

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