Rhinology Practice Questions

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

Rhinoscleroma. **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.

Q: Cerebrospinal fluid (CSF) rhinorrhoea is diagnosed by:

Beta 2 transferrin. **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.

Q: What is the diagnostic test for CSF rhinorrhea?

Beta-2 transferrin. **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.

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

Allergic rhinitis. **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.

Q: Rhinoscleroma is caused by which type of microorganism?

Bacteria. **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).

Q: What infection is caused by the 'Frisch bacillus'?

Rhinoscleroma. **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.

Q: 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?

Should be managed by excision with cautery at the base.. **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).

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

It is also called Ringez tumor.. **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 1

Maggots in the nasal cavity are most commonly treated by?

Accepted Answer

Chloroform diluted with water

Answer

Liquid paraffin

Answer

Systemic antibiotics

Answer

Lignocaine spray

Question 2

Mikulicz cells and Russell bodies are characteristic of which condition?

Accepted Answer

Rhinoscleroma

Answer

Rhinosporidiosis

Answer

Plasma cell disorder

Answer

Lethal midline granuloma

Question 3

Cerebrospinal fluid (CSF) rhinorrhoea is diagnosed by:

Accepted Answer

Beta 2 transferrin

Answer

Beta 2 microglobulin

Answer

Thyroglobulin

Answer

Transthyretin

Question 4

What is the diagnostic test for CSF rhinorrhea?

Accepted Answer

Beta-2 transferrin

Answer

Beta-2 microglobulin

Answer

Thyroglobulin

Answer

Transthyretin

Question 5

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

Accepted Answer

Allergic rhinitis

Answer

Acute sinusitis

Answer

Nasal polyp

Answer

Acute tonsillitis

Question 6

Rhinoscleroma is caused by which type of microorganism?

Accepted Answer

Bacteria

Answer

Virus

Answer

Fungus

Answer

Anaerobes

Question 7

What infection is caused by the 'Frisch bacillus'?

Accepted Answer

Rhinoscleroma

Answer

Rhinosporidiosis

Answer

Rhinophyma

Answer

Lupus Vulgaris

Question 8

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?

Accepted Answer

Should be managed by excision with cautery at the base.

Answer

Caused by the fungus Rhinosporidium.

Answer

Biopsy shows Miculicz cells.

Answer

Rifampicin is indicated for treatment.

Question 9

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

Accepted Answer

It is also called Ringez tumor.

Answer

It is always unilateral.

Answer

It is more common in males.

Answer

10-15% of cases may be associated with squamous cell carcinoma.

Question 10

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

Accepted Answer

Deviated nasal septum (DNS)

Answer

Chronic sinusitis

Answer

Nasal deformity

Answer

Strong hereditary factors

Rhinology — MCQs

Rhinology — MCQs

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