Rhinology — MCQs

Rhinology Indian Medical PG Practice Questions and MCQs

Question 11: Maggots in the nasal cavity are most commonly treated by?

A. Chloroform diluted with water (Correct Answer)
B. Liquid paraffin
C. Systemic antibiotics
D. Lignocaine spray

Explanation: **Explanation:** Nasal Myiasis (maggots in the nose) is a condition caused by the infestation of the larvae of the *Chrysomyia bezziana* fly. It is commonly seen in patients with poor hygiene, atrophic rhinitis, or those with neglected nasal wounds. **1. Why Chloroform diluted with water is correct:** The primary goal of treatment is to kill and remove the larvae. Chloroform acts as a potent **volatile anesthetic and irritant** to the maggots. When a mixture of **chloroform and water (ratio 1:4)** is instilled into the nasal cavity, the vapors act to: * **Stun/Asphyxiate the maggots:** This causes them to release their grip on the nasal mucosa. * **Induce migration:** The irritation forces the maggots to crawl out toward the nostrils, making manual removal with forceps easier. **2. Why other options are incorrect:** * **Liquid paraffin:** While it can be used to suffocate larvae in some superficial skin infestations, it is not the standard of care for nasal myiasis as it lacks the irritant "flushing" effect of chloroform. * **Systemic antibiotics:** These are used as **adjunctive therapy** to treat secondary bacterial infections caused by tissue destruction, but they do not kill the maggots themselves. * **Lignocaine spray:** This provides local anesthesia for the patient but does not effectively stun or kill the maggots for removal. **Clinical Pearls for NEET-PG:** * **Atrophic Rhinitis:** This is the most common predisposing factor for nasal myiasis due to the characteristic "merciful anosmia" (patient cannot smell the foul odor) and wide nasal chambers. * **Complications:** If untreated, maggots can cause extensive destruction of the nasal septum, palate, and even intracranial extension (meningitis). * **Turpentine Oil:** In some clinical settings, turpentine oil is also used as an alternative to chloroform to irritate and expel the larvae. * **Ivermectin:** Oral or topical Ivermectin is an emerging high-yield pharmacological treatment for severe cases.

Question 12: Mikulicz cells and Russell bodies are characteristic of which condition?

A. Rhinoscleroma (Correct Answer)
B. Rhinosporidiosis
C. Plasma cell disorder
D. Lethal midline granuloma

Explanation: **Explanation:** **Rhinoscleroma** is a chronic granulomatous disease caused by the Gram-negative bacterium *Klebsiella rhinoscleromatis* (Frisch bacillus). The diagnosis is confirmed by the presence of two pathognomonic histological features: 1. **Mikulicz Cells:** Large, foamy histiocytes (macrophages) with a vacuolated cytoplasm containing the causative bacilli. 2. **Russell Bodies:** Eosinophilic, hyaline inclusions found within plasma cells, representing accumulated immunoglobulin. **Analysis of Options:** * **Rhinosporidiosis:** Caused by *Rhinosporidium seeberi*. Histology shows characteristic large **sporangia** containing numerous endospores, not Mikulicz cells. * **Plasma Cell Disorder (e.g., Multiple Myeloma):** While Russell bodies can be seen in various plasma cell reactive states, the combination with Mikulicz cells is specific to Rhinoscleroma. * **Lethal Midline Granuloma:** Now largely classified as NK/T-cell lymphoma, it is characterized by extensive tissue necrosis and polymorphic cellular infiltrates, lacking the specific granulomatous features of Rhinoscleroma. **High-Yield Clinical Pearls for NEET-PG:** * **Stages of Rhinoscleroma:** Atrophic stage → Granulomatous (Proliferative) stage → Cicatricial (Fibrotic) stage. * **Clinical Sign:** "Hebra Nose" (woody hard swelling of the nose). * **Site:** Most commonly affects the nasal septum and floor of the nose; can involve the larynx (subglottis). * **Treatment:** Long-term antibiotics (Streptomycin and Tetracycline are traditional; Ciprofloxacin is now preferred). Surgery is reserved for cicatricial stenosis.

Question 13: Cerebrospinal fluid (CSF) rhinorrhoea is diagnosed by:

A. Beta 2 microglobulin
B. Beta 2 transferrin (Correct Answer)
C. Thyroglobulin
D. Transthyretin

Explanation: **Explanation:** **Beta-2 transferrin** is the gold standard biochemical marker for diagnosing CSF rhinorrhoea. Transferrin is an iron-binding protein found in most body fluids; however, the specific **Beta-2 isoform** (also known as tau protein) is produced by the neuraminidase activity in the brain. It is found **exclusively** in the CSF, perilymph, and aqueous humor, and is absent from blood, nasal secretions, tears, or saliva. Its high sensitivity and specificity make it the investigation of choice to confirm the presence of CSF in nasal discharge. **Analysis of Incorrect Options:** * **Beta-2 microglobulin:** While found in CSF, it is also present in high concentrations in blood and other secretions, making it non-specific for diagnosing a CSF leak. * **Thyroglobulin:** This is a precursor protein for thyroid hormones produced by the thyroid gland. It is used as a tumor marker for thyroid cancer, not for CSF detection. * **Transthyretin (Prealbumin):** Although synthesized by the choroid plexus and found in CSF, it is also synthesized by the liver and found in systemic circulation, lacking the specificity required for a definitive diagnosis. **High-Yield Clinical Pearls for NEET-PG:** * **Beta-trace protein:** Another highly sensitive and specific marker for CSF (often considered faster than Beta-2 transferrin in some settings). * **Target Sign/Halo Sign:** A bedside test where CSF forms a clear outer ring around a central spot of blood on filter paper (suggestive but not confirmatory). * **Reservoir Sign:** Characterized by a gush of fluid when the patient leans forward or performs a Valsalva maneuver. * **Glucose levels:** Traditionally, a glucose level >30 mg/dl was used, but this is now considered **unreliable** due to interference from lacrimal secretions and nasal mucus.

Question 14: What is the diagnostic test for CSF rhinorrhea?

A. Beta-2 microglobulin
B. Beta-2 transferrin (Correct Answer)
C. Thyroglobulin
D. Transthyretin

Explanation: **Explanation:** **Beta-2 transferrin** is the gold standard biochemical investigation for diagnosing CSF rhinorrhea. Transferrin normally exists in the serum as Beta-1 transferrin. However, within the cerebrospinal fluid (CSF), the enzyme neuraminidase modifies it into the **Beta-2 isoform** (also known as tau protein). Since Beta-2 transferrin is found **exclusively** in the CSF, perilymph, and aqueous humor—and is absent from blood, nasal mucus, or tears—its presence in nasal discharge is highly specific and sensitive for a CSF leak. **Analysis of Incorrect Options:** * **A. Beta-2 microglobulin:** While found in CSF, it is also present in high concentrations in blood and various inflammatory conditions, making it non-specific for diagnosing a leak. * **C. Thyroglobulin:** This is a precursor protein for thyroid hormones and serves as a tumor marker for differentiated thyroid cancer; it has no role in CSF analysis. * **D. Transthyretin (Prealbumin):** Although it is synthesized by the choroid plexus and found in CSF, it is also a common serum protein, rendering it unreliable for differentiating CSF from nasal secretions. **High-Yield Clinical Pearls for NEET-PG:** * **Most sensitive/specific test:** Beta-2 transferrin (requires only a small sample). * **Beta-trace protein:** Another highly accurate marker (prostaglandin D2 synthase), often considered faster but less widely available than Beta-2 transferrin. * **Reservoir Sign:** Characterized by a gush of fluid when the patient leans forward (Target/Halo sign on bedsheets is classic but less specific). * **Imaging:** **High-resolution CT (HRCT)** of the paranasal sinuses is the initial imaging of choice to locate the bony defect. **Fluorescein study** (intrathecal injection) is used for intraoperative localization.

Question 15: Charcot-Leyden crystals are typically seen in which of the following conditions?

A. Allergic rhinitis (Correct Answer)
B. Acute sinusitis
C. Nasal polyp
D. Acute tonsillitis

Explanation: **Explanation:** **1. Why Allergic Rhinitis is Correct:** Charcot-Leyden crystals are microscopic, hexagonal, bipyramidal crystals formed from the breakdown of **eosinophils**. Specifically, they are composed of the enzyme **Galectin-10**. Since Allergic Rhinitis is a Type I hypersensitivity reaction characterized by significant eosinophilic infiltration in the nasal mucosa and secretions, these crystals are a hallmark finding in nasal smears of affected patients. **2. Why the Other Options are Incorrect:** * **Acute Sinusitis:** This is typically a bacterial or viral infection characterized by a **neutrophilic** inflammatory response and purulent discharge, rather than eosinophilic activity. * **Nasal Polyp:** While eosinophils are often present in ethmoidal (allergic) polyps, Charcot-Leyden crystals are more classically associated with the active allergic inflammatory process of the nasal mucosa itself. However, in the context of a single-best-answer question, Allergic Rhinitis is the primary clinical association. * **Acute Tonsillitis:** This is an inflammatory condition of the Waldeyer’s ring, usually caused by *Streptococcus pyogenes* or viruses, involving neutrophils and lymphocytes, not eosinophils. **3. High-Yield Clinical Pearls for NEET-PG:** * **Composition:** Charcot-Leyden crystals = Lysophospholipase / Galectin-10. * **Associated Conditions:** Besides Allergic Rhinitis, they are found in **Bronchial Asthma** (sputum), **Allergic Fungal Rhinosinusitis (AFRS)**, and parasitic infections (stool). * **Curschmann’s Spirals:** Often mentioned alongside these crystals in asthma; these are mucous plugs found in the bronchioles. * **Diagnostic Test:** A nasal smear showing >10% eosinophils is suggestive of Allergic Rhinitis.

Question 16: Rhinoscleroma is caused by which type of microorganism?

A. Virus
B. Bacteria (Correct Answer)
C. Fungus
D. Anaerobes

Explanation: **Explanation:** Rhinoscleroma is a chronic, progressive granulomatous disease of the upper respiratory tract. The correct answer is **Bacteria** because the condition is caused by **Klebsiella rhinoscleromatis** (also known as the Frisch bacillus), which is a Gram-negative, encapsulated, non-motile coccobacillus. * **Why Bacteria is correct:** The disease is an infectious process specifically triggered by the *Klebsiella* species. It typically affects the nasal cavity but can extend to the nasopharynx, larynx, and trachea. * **Why other options are incorrect:** * **Virus:** While viruses cause many upper respiratory infections (like the common cold), they do not produce the chronic, woody, granulomatous lesions characteristic of rhinoscleroma. * **Fungus:** Fungal infections (like Rhinosporidiosis or Mucormycosis) present differently. Rhinosporidiosis, for example, presents with leafy, friable masses, whereas Rhinoscleroma presents with hard, "woody" swelling. * **Anaerobes:** *Klebsiella rhinoscleromatis* is a facultative anaerobe, but it is primarily classified and identified by its bacterial genus rather than being a clinical "anaerobic infection" (like those caused by *Bacteroides*). **High-Yield Clinical Pearls for NEET-PG:** 1. **Stages:** It progresses through three stages: **Catarrhal** (atrophic rhinitis-like), **Proliferative/Granulomatous** (painless nodules), and **Cicatricial** (stenosis and scarring). 2. **Histopathology (Must Know):** Look for **Mikulicz cells** (large foamy macrophages containing the bacilli) and **Russell bodies** (eosinophilic hyaline bodies representing degenerated plasma cells). 3. **Treatment:** Long-term antibiotics are required. **Streptomycin and Tetracycline** are the traditional drugs of choice; Ciprofloxacin is also highly effective. 4. **Clinical Sign:** "Hebra Nose" (woody hard swelling of the external nose).

Question 17: What infection is caused by the 'Frisch bacillus'?

A. Rhinoscleroma (Correct Answer)
B. Rhinosporidiosis
C. Rhinophyma
D. Lupus Vulgaris

Explanation: **Explanation:** **1. Why Rhinoscleroma is Correct:** Rhinoscleroma is a chronic, granulomatous infection of the nose and upper respiratory tract caused by **Klebsiella pneumoniae subsp. rhinoscleromatis**, historically known as the **Frisch bacillus**. It is a Gram-negative, encapsulated coccobacillus. The disease typically progresses through three stages: Catarrhal (atrophic), Proliferative (granulomatous), and Cicatricial (fibrotic). A hallmark of this condition is the presence of **Mikulicz cells** (large vacuolated macrophages containing the bacilli) and **Russell bodies** (eosinophilic hyaline bodies) on histopathology. **2. Why Other Options are Incorrect:** * **Rhinosporidiosis:** Caused by *Rhinosporidium seeberi* (a water-borne mesomycetozoan). It presents as leafy, strawberry-like vascular polypoid masses, characterized by sporangia on biopsy. * **Rhinophyma:** A benign skin deformity of the nose resulting from long-standing untreated **Acne Rosacea**. It involves hypertrophy of sebaceous glands and is not an infectious process caused by a bacillus. * **Lupus Vulgaris:** A chronic form of **cutaneous tuberculosis** caused by *Mycobacterium tuberculosis*. It presents with "apple-jelly" nodules on diascopy. **3. High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice:** Streptomycin and Tetracycline are traditionally used; Ciprofloxacin is also highly effective. * **Hebra Nose:** The characteristic "woody" or "tapir-like" deformity of the nose seen in the proliferative stage. * **Biopsy Findings:** Look for "Mikulicz cells" (foamy macrophages) and "Russell bodies" (transformed plasma cells). * **Culture:** The organism can be grown on MacConkey agar, appearing as large, mucoid colonies.

Question 18: A 30-year-old male presents with right-sided nasal obstruction and recurrent epistaxis. On examination, a mulberry mass with white dots is seen in the right nostril. What is true about this disease?

A. Should be managed by excision with cautery at the base. (Correct Answer)
B. Caused by the fungus Rhinosporidium.
C. Biopsy shows Miculicz cells.
D. Rifampicin is indicated for treatment.

Explanation: **Explanation:** The clinical presentation of a **mulberry-like mass with white dots** (sporangia) in a patient with nasal obstruction and epistaxis is classic for **Rhinosporidiosis**. **1. Why Option A is Correct:** Rhinosporidiosis is highly vascular and has a high rate of recurrence. The gold standard treatment is **wide surgical excision** (usually via endonasal approach) followed by **electrocautery of the base**. Cauterization is crucial because it destroys the remaining endospores and minimizes intraoperative bleeding, significantly reducing the risk of recurrence. **2. Why the Other Options are Incorrect:** * **Option B:** While the name suggests a fungal origin, *Rhinosporidium seeberi* is actually an **aquatic parasite** (Mesomycetozoea), not a fungus. * **Option C:** **Mikulicz cells** (foamy macrophages) and Russell bodies are histological hallmarks of **Rhinoscleroma** (caused by *Klebsiella rhinoscleromatis*), not Rhinosporidiosis. Rhinosporidiosis histology shows sporangia containing thousands of endospores. * **Option D:** **Rifampicin** is used in the treatment of Rhinoscleroma or Leprosy. For Rhinosporidiosis, the only medical adjunct sometimes used to prevent recurrence is **Dapsone**, though surgery remains primary. **Clinical Pearls for NEET-PG:** * **Etiology:** Associated with bathing in stagnant pond water. * **Common Site:** Nasal septum and floor of the nose. * **Pathognomonic Sign:** "Strawberry" or "Mulberry" appearance with white dots (representing mature sporangia). * **Diagnosis:** Confirmed by biopsy showing large, thick-walled sporangia containing endospores (Gomori Methenamine Silver or H&E stain).

Question 19: Which of the following statements is NOT true about inverted papilloma?

A. It is always unilateral.
B. It is more common in males.
C. 10-15% of cases may be associated with squamous cell carcinoma.
D. It is also called Ringez tumor. (Correct Answer)

Explanation: **Explanation:** Inverted papilloma (Schneiderian papilloma) is a benign but locally aggressive sinonasal tumor. The correct answer is **D** because the statement is factually incorrect; the tumor is actually known as **Ringertz tumor** (named after Nils Ringertz), not "Ringez tumor." **Analysis of Options:** * **Option A (It is always unilateral):** This is a classic characteristic of inverted papilloma. It typically arises from the lateral wall of the nose (near the middle meatus) and presents as a unilateral nasal mass. Bilateral involvement is extremely rare. * **Option B (More common in males):** Epidemiologically, inverted papilloma shows a strong male predilection, typically with a ratio of 3:1 or 4:1, usually occurring in the 5th to 7th decades of life. * **Option C (10-15% associated with SCC):** This is a critical clinical feature. Inverted papilloma is known for its potential for malignant transformation into Squamous Cell Carcinoma (SCC) in approximately 10-15% of cases. **Clinical Pearls for NEET-PG:** * **Site of Origin:** Most commonly the lateral nasal wall (middle meatus/ethmoid sinus). * **Histopathology:** Characterized by the endophytic growth of surface epithelium into the underlying stroma (hence "inverted"). * **Radiology:** On CT, it may show a "bony spur" at the site of origin, which helps in surgical planning. * **Treatment:** Gold standard is **Endoscopic Medial Maxillectomy**. Simple polypectomy leads to high recurrence rates. * **Association:** Often linked with Human Papillomavirus (HPV) types 6 and 11.

Question 20: Which of the following is NOT implicated in the etiology of atrophic rhinitis?

A. Chronic sinusitis
B. Nasal deformity
C. Deviated nasal septum (DNS) (Correct Answer)
D. Strong hereditary factors

Explanation: **Explanation:** Atrophic rhinitis is a chronic nasal condition characterized by progressive atrophy of the nasal mucosa and turbinate bones, leading to a paradoxically wide nasal cavity filled with foul-smelling crusts. **Why DNS is the Correct Answer:** A **Deviated Nasal Septum (DNS)** is generally considered a structural variation rather than a primary etiological factor for atrophic rhinitis. While DNS can cause unilateral compensatory hypertrophy of the turbinates on the wider side, it does not inherently trigger the diffuse mucosal atrophy and endarteritis characteristic of the disease. In fact, atrophic rhinitis typically presents with a wide, patent airway, which is the opposite of the mechanical obstruction caused by a DNS. **Analysis of Incorrect Options:** * **Chronic Sinusitis (A):** Chronic purulent discharge from the sinuses can lead to secondary atrophic rhinitis. The constant presence of infected material causes mucosal destruction and ciliary loss over time. * **Nasal Deformity (B):** Extensive surgical procedures (like radical turbinate resection) or trauma that significantly alters nasal architecture can lead to "Secondary Atrophic Rhinitis" due to excessive airflow and loss of humidifying surface area. * **Strong Hereditary Factors (D):** There is a recognized familial predisposition. It often affects multiple members of a family, suggesting a genetic susceptibility, possibly linked to HLA patterns. **High-Yield Clinical Pearls for NEET-PG:** * **Organism:** *Klebsiella ozaenae* (Perez bacillus) is the most common organism isolated. * **Merciful Anosmia:** The patient cannot smell the foul odor (ozaena) emanating from their own nose due to destruction of olfactory epithelium. * **Young’s Operation:** A surgical treatment involving the complete closure of nostrils to allow the mucosa to recover. * **Mnemonic for Etiology (HERNIA):** **H**ereditary, **E**ndocrine (puberty/females), **R**acial, **N**utritional (Vitamin A, D, or Iron deficiency), **I**nfective, **A**utoimmune.

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Rhinology — MCQs

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