Rhinology — MCQs
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All of the following arteries contribute to Little's area EXCEPT?
Large nasal cavity with thick crust formation internally and a 'woody' feel of the external nose is characteristic of which condition?
In which stage of syphilis is the nose commonly involved?
Endoscopic surgery is not indicated in which of the following conditions?
Foul-smelling nasal discharge is seen in all except?
Which of the following anatomical structures opens into the middle meatus of the nose?
Which of the following is true regarding ethmoidal polyps?
A young diabetic patient presents with blackish nasal discharge. What is the most likely diagnosis?
Killian's incision is used for:
Which of the following antineoplastic drugs is used to prevent synechiae formation after endoscopic nasal procedures?
Rhinology Indian Medical PG Practice Questions and MCQs
Question 21: All of the following arteries contribute to Little's area EXCEPT?
- A. Anterior Ethmoidal artery
- B. Posterior Ethmoidal artery (Correct Answer)
- C. Sphenopalatine artery
- D. Greater palatine artery
Explanation: **Explanation:** Little’s area (Kiesselbach's plexus) is a highly vascular region located in the anteroinferior part of the nasal septum. It is the most common site for epistaxis (90% of cases). This area is formed by the anastomosis of four major arteries derived from both the Internal Carotid Artery (ICA) and External Carotid Artery (ECA) systems. **Why Posterior Ethmoidal Artery is the Correct Answer:** The **Posterior Ethmoidal artery** does not contribute to Little’s area. It supplies the superior turbinate and the posterior part of the nasal septum. In the context of the nasal septum, only the **Anterior Ethmoidal artery** (a branch of the Ophthalmic artery/ICA) descends to participate in the plexus. **Analysis of Incorrect Options:** * **Anterior Ethmoidal Artery (ICA system):** Descends through the ethmoid bone to supply the anterosuperior part of the septum and joins the plexus. * **Sphenopalatine Artery (ECA system):** Known as the "Artery of Epistaxis," it is a terminal branch of the Maxillary artery and provides the primary blood supply to the posterior septum and Little's area. * **Greater Palatine Artery (ECA system):** Reaches the septum through the incisive canal to supply the inferior portion of the plexus. * *(Note: The **Superior Labial Artery**, a branch of the Facial artery, also contributes but is not listed in the options.)* **Clinical Pearls for NEET-PG:** * **Woodruff’s Plexus:** Located over the posterior end of the middle turbinate; it is the site for **posterior epistaxis**, primarily involving the Sphenopalatine artery. * **Retro-columellar vein:** The most common cause of venous epistaxis in young people, located just behind the columella. * **Management:** Anterior epistaxis is typically managed by pinching the nose (Trotter’s method) or anterior nasal packing, whereas posterior epistaxis may require posterior packing or endoscopic ligation of the sphenopalatine artery.
Question 22: Large nasal cavity with thick crust formation internally and a 'woody' feel of the external nose is characteristic of which condition?
- A. Rhinoscleroma (Correct Answer)
- B. Rhinosporidiosis
- C. Atrophic rhinitis
- D. Vasomotor rhinitis
Explanation: **Explanation:** **Rhinoscleroma** is a chronic granulomatous disease caused by *Klebsiella rhinoscleromatis* (Frisch bacillus). It typically progresses through three stages: Catarrhal (atrophic), Proliferative (granulomatous), and Cicatricial (fibrotic). * **Why it is correct:** In the **atrophic stage**, patients present with a large nasal cavity and foul-smelling crusts (mimicking atrophic rhinitis). However, as it progresses to the **proliferative stage**, painless, non-ulcerating granulomas form. These granulomas eventually undergo fibrosis in the **cicatricial stage**, leading to the characteristic **"woody" or "hard" feel** of the external nose and potential stenosis of the nares. **Why other options are incorrect:** * **Rhinosporidiosis:** Caused by *Rhinosporidium seeberi*, it presents as a leafy, strawberry-like, friable vascular polyp, usually following exposure to stagnant water. It does not cause a "woody" external nose. * **Atrophic Rhinitis:** While it features a large nasal cavity and thick green crusts (roomy nose), it is characterized by atrophy of the mucosa and turbinates, not the "woody" induration seen in Rhinoscleroma. * **Vasomotor Rhinitis:** A non-allergic condition characterized by nasal congestion and watery rhinorrhea triggered by autonomic instability; it lacks crusting or structural changes. **High-Yield Clinical Pearls for NEET-PG:** * **Biopsy findings:** Look for **Mikulicz cells** (foamy macrophages containing the bacilli) and **Russell bodies** (eosinophilic hyaline inclusions in plasma cells). * **Drug of Choice:** Streptomycin and Tetracycline are traditionally used; Ciprofloxacin is also effective. * **Involvement:** It typically starts in the nose but can involve the nasopharynx, larynx (subglottis), and trachea.
Question 23: In which stage of syphilis is the nose commonly involved?
- A. Primary
- B. Secondary
- C. Tertiary (Correct Answer)
- D. Equally involved in all stages
Explanation: **Explanation:** The nose is most commonly and severely involved in the **Tertiary stage** of syphilis. While syphilis is a systemic infection caused by *Treponema pallidum*, its nasal manifestations vary significantly by stage. **Why Tertiary Syphilis is the Correct Answer:** In the tertiary stage, the characteristic lesion is the **Gumma**. This is a chronic granulomatous lesion that predilects the bony portion of the nasal septum. As the gumma undergoes necrosis, it leads to extensive destruction of the septal bone and cartilage, resulting in a **perforation** and the classic **"Saddle Nose" deformity** (depression of the nasal bridge). **Analysis of Incorrect Options:** * **Primary Syphilis:** Nasal involvement is **extremely rare**. The primary lesion (chancre) typically occurs on the external genitalia. If it occurs in the nose, it usually involves the vestibule or the alae. * **Secondary Syphilis:** Nasal involvement is uncommon but presents as **persistent rhinitis** (snuffles) or mucous patches. It is less frequent and less destructive than the tertiary stage. * **Equally involved:** This is incorrect because the pathological hallmark of syphilis in the head and neck is the gumma, which is exclusive to the tertiary stage. **High-Yield Clinical Pearls for NEET-PG:** * **Congenital Syphilis:** Presents with **"Snuffles"** (purulent/bloody nasal discharge) in the early stage and **Hutchinson’s triad** (interstitial keratitis, sensorineural hearing loss, and notched incisors) in the late stage. * **Site of Perforation:** Syphilis typically destroys the **bony septum**, whereas Tuberculosis (Lupus Vulgaris) and Leprosy primarily affect the **cartilaginous septum**. * **Treatment of Choice:** Parenteral **Penicillin G** remains the gold standard for all stages of syphilis.
Question 24: Endoscopic surgery is not indicated in which of the following conditions?
- A. Optic nerve compression
- B. CSF rhinorrhea
- C. Dacryocystic carcinoma (Correct Answer)
- D. Ethmoidal polyps
Explanation: **Explanation:** The correct answer is **Dacryocystic carcinoma**. In surgical oncology, the primary goal for malignant tumors is achieving "clear margins." Endoscopic surgery for malignancies of the lacrimal apparatus (like dacryocystic carcinoma) is generally contraindicated because it carries a high risk of incomplete resection, tumor seeding, and inability to manage orbital or cutaneous extension effectively. These cases typically require an **external approach** (lateral rhinotomy or medial maxillectomy) to ensure oncological safety. **Analysis of Incorrect Options:** * **Optic Nerve Compression:** Endoscopic Optic Nerve Decompression is a standard indication, especially in cases of traumatic optic neuropathy or compression by tumors/mucocele, as it provides excellent visualization of the medial orbital wall and apex. * **CSF Rhinorrhea:** Endoscopic endonasal repair is currently the **gold standard** for most CSF leaks (cribriform plate, sphenoid sinus), boasting a success rate of over 90% with lower morbidity compared to intracranial approaches. * **Ethmoidal Polyps:** Functional Endoscopic Sinus Surgery (FESS) is the definitive surgical treatment for ethmoidal polyps (Chronic Rhinosinusitis with Nasal Polyps) when medical management fails. **High-Yield Clinical Pearls for NEET-PG:** * **Absolute Contraindications for Endoscopic Sinus Surgery:** Malignant tumors with extensive involvement of the soft tissues of the face, orbit, or brain, and osteomyelitis of the frontal bone (Pott’s Puffy Tumor) requiring radical debridement. * **Dacryocystitis vs. Carcinoma:** While Dacryocystorhinostomy (DCR) is frequently done endoscopically for benign obstructions, any suspicion of malignancy (firm, non-reducible mass) mandates an open approach. * **Chandler’s Classification:** Remember that orbital complications of sinusitis (Stage III-V) often require urgent endoscopic drainage.
Question 25: Foul-smelling nasal discharge is seen in all except?
- A. Nasal myiasis
- B. Choanal atresia (Correct Answer)
- C. Foreign body in nose
- D. Rhinolith
Explanation: **Explanation:** The hallmark of **foul-smelling (cacosmia), unilateral nasal discharge** in clinical practice is usually the presence of necrotic tissue, decaying organic matter, or specific bacterial putrefaction. **Why Choanal Atresia is the correct answer:** Choanal atresia is a congenital narrowing or occlusion of the posterior nasal aperture. It presents with a **thick, gelatinous, and odorless** discharge (due to accumulated goblet cell secretions that cannot drain into the nasopharynx). It does not involve tissue necrosis or foreign material decay, thus it lacks the characteristic foul smell. **Analysis of Incorrect Options:** * **Nasal Myiasis:** Caused by infestation with maggots (usually *Chrysomyia bezziana*). The larvae cause extensive tissue destruction and necrosis, leading to a classic, repulsive putrid odor. * **Foreign Body in Nose:** A long-standing foreign body (especially organic) triggers a local inflammatory response, secondary bacterial infection, and suppuration, resulting in unilateral, foul-smelling, purulent discharge. * **Rhinolith:** These are "nasal stones" formed by the deposition of mineral salts around a neglected foreign body nidus. They cause pressure necrosis of the mucosa and trap secretions, leading to a characteristic malodor. **High-Yield Clinical Pearls for NEET-PG:** * **Unilateral foul-smelling discharge in a child:** Always rule out a **Foreign Body** first. * **Unilateral foul-smelling discharge in an elderly patient:** Always rule out **Malignancy**. * **Bilateral Choanal Atresia:** A neonatal emergency because newborns are obligatory nasal breathers. It presents with cyclic cyanosis (relieved by crying). * **Other causes of foul discharge:** Atrophic rhinitis (Merciful anosmia), Chronic Sinusitis (especially fungal or dental origin), and Midline Lethal Granuloma.
Question 26: Which of the following anatomical structures opens into the middle meatus of the nose?
- A. Nasolacrimal duct
- B. Eustachian tube
- C. Sphenoidal sinus
- D. Maxillary sinus (Correct Answer)
Explanation: The middle meatus is a clinically significant space located between the middle and inferior turbinates. It serves as the primary drainage pathway for the **anterior group of paranasal sinuses**. ### 1. Why the Maxillary Sinus is Correct The maxillary sinus drains into the middle meatus via the **hiatus semilunaris**. This area, known as the **Osteomeatal Complex (OMC)**, is the functional unit of the anterior sinuses. Obstruction here is the most common cause of chronic rhinosinusitis. Other structures opening into the middle meatus include the **frontal sinus** (via the infundibulum) and the **anterior ethmoidal air cells**. ### 2. Analysis of Incorrect Options * **A. Nasolacrimal duct:** This opens into the **inferior meatus**. It is guarded by a mucosal fold known as **Hasner’s valve**. * **B. Eustachian tube:** This opens into the **nasopharynx**, specifically on the lateral wall, posterior to the inferior turbinate. * **C. Sphenoidal sinus:** This opens into the **sphenoethmoidal recess**, which is located above and behind the superior turbinate. ### 3. High-Yield Clinical Pearls for NEET-PG * **Superior Meatus:** Only the **posterior ethmoidal sinuses** drain here. * **Bulla Ethmoidalis:** This is the largest anterior ethmoidal cell and forms the upper boundary of the hiatus semilunaris in the middle meatus. * **Agger Nasi:** The most anterior ethmoidal cell, often used as a landmark in FESS (Functional Endoscopic Sinus Surgery). * **Little’s Area (Kiesselbach's Plexus):** Located on the anterior-inferior part of the nasal septum; it is the most common site for epistaxis, not related to the meatuses.
Question 27: Which of the following is true regarding ethmoidal polyps?
- A. Epistaxis
- B. Unilateral presentation
- C. Common in patients under 10 years of age
- D. Associated with bronchial asthma (Correct Answer)
Explanation: **Explanation:** Ethmoidal polyps are non-neoplastic, edematous hypertrophies of the ethmoidal sinus mucosa. They are typically associated with chronic inflammation and allergies. **Why Option D is Correct:** Ethmoidal polyps are frequently associated with **bronchial asthma** and aspirin sensitivity. This clinical triad (Asthma, Aspirin sensitivity, and Nasal Polyposis) is known as **Samter’s Triad** (or Widal’s Triad). The underlying pathophysiology involves a shift in the arachidonic acid metabolism toward the leukotriene pathway, leading to chronic mucosal inflammation in both the upper and lower airways. **Why Other Options are Incorrect:** * **A. Epistaxis:** Ethmoidal polyps are typically painless and do not bleed. If a "polyp" presents with epistaxis, one must rule out malignancy (like Squamous Cell Carcinoma) or an Inverted Papilloma. * **B. Unilateral presentation:** Ethmoidal polyps are almost always **bilateral** and multiple (resembling a "bunch of grapes"). A unilateral polyp in an adult should be viewed with suspicion for malignancy; in a child, it may be an Antrochoanal polyp or an Encephalocele. * **C. Common in patients under 10 years:** These polyps are most common in adults. If nasal polyps are found in a child under 10, it is a high-yield clinical indicator to screen for **Cystic Fibrosis**. **High-Yield Clinical Pearls for NEET-PG:** * **Appearance:** Pale, translucent, mobile, and insensitive to touch (unlike the turbinates). * **Kartagener’s Syndrome:** Often associated with nasal polyposis, bronchiectasis, and situs inversus. * **Treatment of Choice:** Functional Endoscopic Sinus Surgery (FESS) is the surgical mainstay, but medical management with topical/systemic steroids is essential to prevent the high recurrence rate.
Question 28: A young diabetic patient presents with blackish nasal discharge. What is the most likely diagnosis?
- A. Aspergillosis
- B. Mucormycosis (Correct Answer)
- C. Rhinosporidiosis
- D. Moniliasis
Explanation: **Explanation:** The clinical presentation of a **diabetic patient** with **blackish nasal discharge** is a classic "spotter" for **Mucormycosis** (specifically Rhinocerebral Mucormycosis). **Why Mucormycosis is correct:** Mucormycosis is an opportunistic angioinvasive fungal infection caused by fungi of the order Mucorales. It thrives in acidic environments (Diabetic Ketoacidosis) and high glucose levels. The hallmark of this disease is **angioinvasion**, where the fungi invade blood vessels, leading to thrombosis and subsequent **tissue necrosis**. This necrosis manifests clinically as a characteristic **black eschar** on the turbinates or palate and blackish nasal discharge. **Why other options are incorrect:** * **Aspergillosis:** While it can cause fungal balls (Maxillary sinus) or invasive disease in immunocompromised patients, it typically presents with greenish-brown "peanut butter" discharge rather than acute black necrosis. * **Rhinosporidiosis:** Caused by *Rhinosporidium seeberi*, it presents as a friable, leafy, strawberry-like vascular polyp in the nose, usually following bathing in stagnant water. It does not cause black necrosis. * **Moniliasis (Candidiasis):** Typically presents as white, curd-like patches (thrush) on mucosal surfaces; it is not associated with black necrotic discharge. **High-Yield Clinical Pearls for NEET-PG:** * **Risk Factors:** Uncontrolled Diabetes (DKA), Neutropenia, and Iron overload (Deferoxamine use). * **Diagnosis:** KOH mount shows **broad, ribbon-like, aseptate hyphae** branching at **right angles (90°)**. * **Management:** Surgical debridement + Intravenous **Liposomal Amphotericin B** (Drug of choice). * **Imaging:** "Black Turbinate Sign" on MRI (indicates necrosis).
Question 29: Killian's incision is used for:
- A. Submucous resection of nasal septum (Correct Answer)
- B. Intranasal antrostomy
- C. Caldwell-Luc operation
- D. Myringoplasty
Explanation: **Explanation:** **Killian’s Incision** is the classic incision used for **Submucous Resection (SMR)** of the nasal septum. It is a curvilinear or oblique incision made on the nasal septum, approximately 5 mm proximal to the caudal margin of the septal cartilage. It is specifically designed to allow the surgeon to elevate the mucoperichondrial and mucoperiosteal flaps to access the bony and cartilaginous septum while preserving the caudal support. **Analysis of Options:** * **Submucous Resection (SMR):** Correct. Killian’s incision is the standard approach for SMR. Note that for Septoplasty, a **Freer’s incision** (hemitransfixion incision) at the caudal border of the cartilage is more commonly used. * **Intranasal Antrostomy:** This procedure involves creating an opening in the inferior meatus to drain the maxillary sinus. It does not involve a septal incision. * **Caldwell-Luc Operation:** This uses a **sublabial incision** (gingivobuccal sulcus) to access the maxillary sinus through the canine fossa. * **Myringoplasty:** This is an ear surgery (repair of the tympanic membrane) using incisions like the **Wilder’s post-aural** or **Rosen’s endomeatal** incision. **High-Yield Clinical Pearls for NEET-PG:** * **Killian’s vs. Freer’s:** Killian’s is made *posterior* to the caudal border (used in SMR); Freer’s is made *at* the caudal border (used in Septoplasty). * **SMR Contraindication:** It is generally avoided in children (below 17 years) as it can interfere with mid-facial growth. * **Complication:** The most common complication of SMR following a Killian's incision is a **septal hematoma**, which if untreated, leads to a septal abscess and "saddle nose" deformity.
Question 30: Which of the following antineoplastic drugs is used to prevent synechiae formation after endoscopic nasal procedures?
- A. Actinomycin
- B. Mitomycin (Correct Answer)
- C. Epirubicin
- D. Pentostatin
Explanation: **Explanation:** **Mitomycin C (MMC)** is the correct answer. It is a potent alkylating agent derived from *Streptomyces caespitosus* that inhibits fibroblast proliferation and collagen synthesis by cross-linking DNA. In rhinology, it is used topically (typically 0.4 mg/ml) to prevent **synechiae (adhesions)** and stenosis after endoscopic sinus surgery (ESS) or dacryocystorhinostomy (DCR). By inhibiting the scarring process, it maintains the patency of the newly created sinus ostia or nasal passages. **Analysis of Incorrect Options:** * **Actinomycin (D):** An antitumor antibiotic primarily used in pediatric oncology (e.g., Wilms tumor, Ewing sarcoma). It does not have a clinical role in preventing surgical adhesions. * **Epirubicin:** An anthracycline used mainly for breast and gastric cancers. It is not used topically in ENT procedures. * **Pentostatin:** A purine analog used specifically for Hairy Cell Leukemia; it has no application in wound healing or rhinology. **High-Yield Clinical Pearls for NEET-PG:** * **Mechanism:** MMC acts as an anti-proliferative agent by inhibiting **fibroblasts**. * **Other ENT uses of Mitomycin C:** 1. Prevention of subglottic stenosis (post-laryngotracheal reconstruction). 2. Maintaining patency in choanal atresia repair. 3. Applied topically during DCR to prevent closure of the osteotomy site. * **Ophthalmology Link:** It is also widely used in glaucoma filtration surgery (trabeculectomy) to prevent bleb scarring.
Practice by Chapter
Functional Endoscopic Sinus Surgery
Practice Questions
Balloon Sinuplasty
Practice Questions
Extended Endoscopic Approaches
Practice Questions
Frontal Sinus Surgery
Practice Questions
Sphenoid Sinus Surgery
Practice Questions
CSF Rhinorrhea Repair
Practice Questions
Revision Sinus Surgery
Practice Questions
Nasal Polyposis Management
Practice Questions
Invasive Fungal Sinusitis
Practice Questions
Orbital Complications of Sinusitis
Practice Questions
Intracranial Complications of Sinusitis
Practice Questions
Olfactory Disorders
Practice Questions
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