Diseases of the Nose and Paranasal Sinuses Practice Questions

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.

Q: Sudden death during maxillary irrigation is most likely due to which of the following complications?

Air embolism. **Explanation:** **Correct Answer: A. Air Embolism** Sudden death during maxillary antral irrigation (Proof puncture) is a rare but catastrophic complication, most commonly attributed to **air embolism**. This occurs when air is accidentally introduced into the venous system. During the procedure, if the trocar tip displaces the sinus mucosa or enters a bony canal, air can be forced into the **pterygoid venous plexus** or the facial veins. From there, it travels to the right heart and then to the pulmonary circulation (causing right heart failure) or through a patent foramen ovale to the cerebral circulation, leading to immediate circulatory collapse and death. **Why other options are incorrect:** * **B. Maxillary artery thrombosis:** While the maxillary artery is in proximity, its injury would typically lead to severe hemorrhage rather than sudden, instantaneous death. Thrombosis is a slower process. * **C. Hemorrhage:** Injury to the sphenopalatine or maxillary artery can cause significant epistaxis, but it is rarely immediately fatal as it does not cause the instantaneous cardiac arrest seen in air embolism. * **D. Meningitis:** This is an inflammatory/infectious complication that develops over days. It cannot cause sudden death during the procedure. **Clinical Pearls for NEET-PG:** * **Prevention:** To prevent air embolism, always ensure the syringe is filled with saline (not air) and **never** use air to "clear" the sinus after irrigation. * **Positioning:** If air embolism is suspected, place the patient in the **Durant’s position** (Left lateral decubitus and Trendelenburg) to trap the air in the apex of the right ventricle. * **Other Complications:** Other risks of antral puncture include orbital injury, cheek hematoma (most common), and vasovagal syncope.

Q: A patient presents with multiple bilateral nasal polyps and radiographic evidence of paranasal sinus opacities. Which of the following treatments would NOT be indicated?

Amphotericin B. ### Explanation **Correct Answer: C. Amphotericin B** **1. Why Amphotericin B is the Correct Answer:** The clinical presentation of multiple bilateral nasal polyps and sinus opacities is characteristic of **Chronic Rhinosinusitis with Nasal Polyposis (CRSwNP)**. This condition is primarily an inflammatory process, often associated with Type 2 helper T-cell (Th2) inflammation. **Amphotericin B** is a potent antifungal medication used for invasive fungal infections (like Mucormycosis) or Allergic Fungal Rhinosinusitis (AFRS) in specific surgical contexts. However, it is **not** a standard or indicated treatment for routine bilateral nasal polyps, as these are non-infectious inflammatory growths. **2. Analysis of Other Options:** * **B. Corticosteroids:** These are the **mainstay of treatment**. They reduce the size of polyps by decreasing mucosal edema and suppressing the inflammatory cascade. Both topical (sprays) and systemic steroids are used. * **D. Antihistamines:** These are indicated if the nasal polyps are associated with underlying allergic rhinitis, helping to control symptoms like sneezing and rhinorrhea. * **A. Epinephrine:** While not a long-term treatment, topical epinephrine (or other sympathomimetics) is used as a **decongestant** to shrink the nasal mucosa during clinical examination or endonasal surgery to improve visualization. **3. High-Yield Clinical Pearls for NEET-PG:** * **Ethmoidal Polyps:** Usually bilateral, multiple, and pearly white. They are common in adults. * **Antrochoanal Polyps:** Usually unilateral, single, and originate from the maxillary sinus. Common in children. * **Samter’s Triad:** Aspirin sensitivity, Asthma, and Nasal Polyposis (High-yield association). * **Kartagener’s Syndrome:** Situs inversus, Bronchiectasis, and Sinusitis/Polyps due to ciliary dyskinesia. * **Investigation of Choice:** Non-contrast CT scan of the Paranasal Sinuses (Coronal view).

Q: Malignant tumors are commonest in which of the following paranasal sinuses?

Maxillary. **Explanation:** The correct answer is **A. Maxillary**. **1. Why Maxillary Sinus is Correct:** The maxillary sinus is the largest of the paranasal sinuses and is the most common site for both benign and malignant neoplasms. Statistically, approximately **80% of all paranasal sinus malignancies** occur in the maxillary sinus. The most common histological type found here is **Squamous Cell Carcinoma (SCC)**. These tumors often present late because the sinus is a large, hollow space, allowing the tumor to grow significantly before causing symptoms like cheek swelling, nasal obstruction, or epistaxis. **2. Why Other Options are Incorrect:** * **Ethmoidal Sinus:** This is the second most common site (approx. 10-15%). Adenocarcinoma is notably associated with the ethmoid sinuses, particularly in workers exposed to wood dust. * **Frontal Sinus:** Malignancies here are rare (approx. 1-2%). This sinus is more commonly associated with benign osteomas. * **Sphenoidal Sinus:** This is the rarest site for primary paranasal malignancies (<1%). Due to its deep location, tumors here often present with cranial nerve palsies or headache. **3. NEET-PG High-Yield Pearls:** * **Ohngren’s Line:** A theoretical line connecting the medial canthus of the eye to the angle of the mandible. Tumors **posterosuperior** to this line have a worse prognosis due to early involvement of the skull base and orbit. * **Most common histology:** Squamous Cell Carcinoma (overall). * **Woodworkers/Furniture industry:** Strongly associated with **Adenocarcinoma** of the Ethmoid sinus. * **Nickel/Leather workers:** Increased risk of Sinonasal Squamous Cell Carcinoma. * **Inverting Papilloma:** A benign but locally aggressive tumor (lateral wall of nose) with a high risk of malignant transformation into SCC.

Question 1

Which type of polyp is most commonly associated with recurrence?

Accepted Answer

Ethmoidal polyp

Answer

Antrochoanal polyp

Answer

Nasal polyp

Answer

Hypertrophic turbinate

Question 2

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 3

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

Question 4

What is true about septal hematoma?

Accepted Answer

Occurs due to trauma, can lead to saddle-nose deformity, and requires conservative treatment.

Answer

Occurs due to trauma, can lead to saddle-nose deformity, and may lead to abscess formation.

Answer

Occurs due to trauma, requires conservative treatment, and may lead to abscess formation.

Answer

Occurs due to trauma and can lead to saddle-nose deformity.

Question 5

A patient presents with an antrochoanal polyp arising from the medial wall of the maxilla. Which of the following is the best management for the patient?

Accepted Answer

FESS with polypectomy

Answer

Medial maxillectomy

Answer

Caldwell-Luc procedure

Answer

Intranasal polypectomy

Question 6

Sudden death during maxillary irrigation is most likely due to which of the following complications?

Accepted Answer

Air embolism

Answer

Maxillary artery thrombosis

Answer

Hemorrhage

Answer

Meningitis

Question 7

Orbital cellulitis is a complication of?

Accepted Answer

Endoscopic sinus surgery

Answer

Parasinusitis

Answer

Faciomaxillary trauma

Answer

All of these

Question 8

A patient presents with multiple bilateral nasal polyps and radiographic evidence of paranasal sinus opacities. Which of the following treatments would NOT be indicated?

Accepted Answer

Amphotericin B

Answer

Epinephrine

Answer

Corticosteroids

Answer

Antihistamines

Question 9

Malignant tumors are commonest in which of the following paranasal sinuses?

Accepted Answer

Maxillary

Answer

Frontal

Answer

Ethmoidal

Answer

Sphenoidal

Question 10

Ohngren's classification of maxillary sinus carcinoma is based on which anatomical landmark or plane?

Accepted Answer

An imaginary plane between the medial canthus of the eye and the angle of the mandible

Answer

An imaginary plane between the lateral canthus of the eye and the angle of the mandible

Answer

Two horizontal lines, one passing through the floor of the orbit and the other through the floor of the antrum

Answer

None of the above

Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses — MCQs

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