Diseases of the Nose and Paranasal Sinuses Practice Questions

Q: Mucoperichondrial flap in septoplasty is made on?

Septal cartilage. ***Septal cartilage*** - A mucoperichondrial flap is meticulously raised on the **septal cartilage** during septoplasty to access and correct deviations of the nasal septum. - This flap preserves the **perichondrium** and overlying mucosa, which is crucial for nutrient supply and healing of the septal cartilage. *Alar cartilage* - The alar cartilage forms the **lower lateral aspect** of the nose and is not involved in creating a mucoperichondrial flap for septal correction. - Procedures involving alar cartilage typically address **nasal tip projection** or alar rim deformities. *Maxillary spine* - The maxillary spine is a **bony prominence** at the anterior nasal floor and forms part of the underlying support for the septum. - While it can sometimes be a site of septal deviation, a mucoperichondrial flap is not primarily raised over the maxillary spine itself. *Sphenoid spine* - The sphenoid spine is a **bony projection** found on the sphenoid bone, located deep within the cranial base, posterior to the nasal cavity. - It is anatomically distant from the nasal septum and has no role in septoplasty or mucoperichondrial flap creation for septal surgical access.

Q: What is Little's area, also known as Kiesselbach's plexus?

Anteroinferior nasal septum. ***Anteroinferior nasal septum*** - **Little's area**, or **Kiesselbach's plexus**, is a well-vascularized region located on the **anteroinferior portion of the nasal septum**. - This area is a common site for **anterior epistaxis** (nosebleeds) due to its superficial position and rich anastomotic blood supply from several arteries. *Anteroinferior lateral wall* - While the lateral nasal wall also contributes to the nasal blood supply, the specific region of **Little's area** is on the **septum**, not the lateral wall. - The **lateral wall** contains structures like the turbinates and their associated vascular networks, which are distinct from Kiesselbach's plexus. *Posteroinferior lateral wall* - The **posterior and inferior aspects** of the nasal cavity are not where Kiesselbach's plexus is predominantly located. - Bleeding from this posterior region often indicates **posterior epistaxis**, which can be more severe and difficult to control. *Posteroinferior nasal septum* - The **posterior nasal septum** is supplied by different arteries, such as branches of the **sphenopalatine artery**. - Bleeding from this part of the septum is also considered **posterior epistaxis** and is not typically associated with Kiesselbach's plexus.

Q: Paranasal sinuses are affected by both benign and malignant neoplasms. What are the commonest benign tumors of the paranasal sinuses?

Osteomas. ***Osteomas*** - **Osteomas** are the most common **benign tumors** of the paranasal sinuses, particularly the **frontal sinus** (80% of cases). - They are slow-growing, dense bone tumors and are often asymptomatic, discovered incidentally on imaging. - Other common locations include ethmoid and maxillary sinuses. *Angiofibroma* - **Juvenile nasopharyngeal angiofibroma (JNA)** is a benign but locally aggressive tumor that primarily arises in the **nasopharynx** of adolescent males. - While it can secondarily extend into the paranasal sinuses, it is **not a primary sinus tumor**. - It presents with epistaxis and nasal obstruction, and is highly vascular. *Adenocarcinoma* - **Adenocarcinoma** is a **malignant tumor** originating from glandular epithelial cells, commonly found in the paranasal sinuses. - It is a type of cancer and not a benign tumor, thus not fitting the description of the question. - Associated with wood dust exposure in some cases. *Burkitt's lymphoma* - **Burkitt's lymphoma** is a highly aggressive **B-cell non-Hodgkin lymphoma**, which can affect the head and neck, including the sinuses. - It is a **malignant lymphoid neoplasm**, not a benign tumor of the paranasal sinuses.

Q: Atrophic rhinitis is caused by:

Klebsiella pneumoniae. ***Klebsiella pneumoniae*** - This bacterium, particularly the subspecies **_ozaenae_**, is a classic cause of **primary atrophic rhinitis**. - It leads to progressive atrophy of the nasal mucosa, turbinates, and underlying bone, resulting in a widened nasal cavity and crust formation. *Pneumococcus* - **_Streptococcus pneumoniae_** (Pneumococcus) is primarily associated with respiratory tract infections like **pneumonia**, otitis media, and sinusitis. - It is not a recognized cause of atrophic rhinitis. *Staphylococcus aureus* - **_Staphylococcus aureus_** is a common commensal of the nasal mucosa and can cause various localized infections like **furuncles** and **vestibulitis**. - While it can be found in secondary infections, it is not considered a primary etiologic agent of atrophic rhinitis. *Herpes virus* - **Herpes viruses**, such as **Herpes Simplex Virus (HSV)**, cause vesicular lesions, commonly known as cold sores, or systemic viral infections. - They are not associated with the pathogenesis of atrophic rhinitis.

Q: Which of the following statements about juvenile angiofibroma is incorrect?

Biopsy for diagnosis. ***Biopsy for diagnosis*** - **Biopsy** is generally **contraindicated** in juvenile angiofibroma due to its highly vascular nature, which can lead to severe hemorrhage. - Diagnosis is typically made based on clinical presentation, imaging (CT/MRI), and often confirmed by **angiography**. *Benign tumor* - Juvenile angiofibroma is a **benign, non-encapsulated tumor** that does not metastasize. - Despite being benign, it is locally aggressive and can cause significant morbidity due to its invasive growth and tendency for recurrence. *Surgical excision* - **Surgical excision** is the primary treatment modality for juvenile angiofibroma. - Pre-operative **embolization** is often performed to reduce intraoperative bleeding and facilitate complete tumor removal. *Second decade* - Juvenile angiofibroma primarily affects **adolescent males**, typically presenting in their **second decade of life**. - This demographic specificity is a key diagnostic clue for the condition.

Q: Ohngren's classification is used for:

Maxillary sinus carcinoma. ***Maxillary sinus carcinoma*** - Ohngren's classification is a staging system specifically used for **maxillary sinus carcinomas**. - It divides the maxillary sinus into **anteroinferior** and **posterosuperior** parts, using a plane passing through the medial canthus and angle of the mandible. *Nasopharyngeal carcinoma* - This type of cancer is staged using the **AJCC (American Joint Committee on Cancer) TNM classification system**, not Ohngren's. - Nasopharyngeal carcinoma has distinct risk factors and presentation, often involving the **Epstein-Barr virus**. *Oropharyngeal carcinoma* - Staging for oropharyngeal carcinoma also utilizes the **AJCC TNM classification**, which has specific considerations for **HPV status**. - It typically affects areas like the **tonsils, base of tongue, and soft palate**. *Tongue carcinoma* - Squamous cell carcinoma of the tongue is staged using the **AJCC TNM system**, focusing on tumor size, nodal involvement, and distant metastasis. - Prognosis depends heavily on the **depth of invasion** and lymph node status.

Q: A boy has developed epistaxis. What is the treatment of choice?

Digital pressure. ***Digital pressure*** - This is the **initial and most common first-line treatment** for acute epistaxis, especially in children, as most nosebleeds originate from Kiesselbach's plexus in the anterior septum. - Applying firm, continuous pressure to the soft part of the nose for 10-15 minutes can effectively compress the bleeding vessels and promote clot formation. *Cauterization of vessels* - This method is used when **digital pressure fails** to control the bleeding and the bleeding site can be identified, often in the anterior septum. - It involves using chemical (e.g., silver nitrate) or electrical methods to seal the bleeding vessel. *Surgical ligation* - **Surgical ligation** is reserved for severe, posterior epistaxis that is refractory to other methods like nasal packing or embolization. - It involves surgically tying off the major arteries supplying the nose (e.g., internal maxillary, external carotid) and carries greater risks. *Nasal packing* - **Nasal packing** is typically used when direct pressure has failed, and the bleeding site is not easily amenable to cauterization, or in cases of posterior epistaxis. - It involves inserting material into the nasal cavity to apply direct pressure to the bleeding vessel, but it is more invasive and uncomfortable than digital pressure.

Q: Osteomas are common in which of the following sinuses?

Frontal. ***Frontal*** - **Osteomas** are the most common benign tumors of the paranasal sinuses, with the **frontal sinus** being the most frequently affected site. - They are slow-growing, dense bone tumors and can cause symptoms like headache, facial pain, or visual disturbances if they grow large enough to obstruct sinus drainage or compress vital structures. *Ethmoid* - While osteomas can occur in the ethmoid sinuses, they are **less common** compared to the frontal sinuses. - Ethmoid osteomas may present with symptoms related to orbital involvement due to proximity. *Maxillary* - The maxillary sinuses are **infrequently affected** by osteomas. - When present, maxillary osteomas can cause facial pain, swelling, or obstruct sinus drainage leading to sinusitis. *Sphenoid* - Osteomas in the sphenoid sinus are **rare**. - Due to the critical structures surrounding the sphenoid sinus, even small osteomas in this location can potentially cause significant symptoms, such as visual changes or cranial nerve palsies.

Q: The etiology of anterior ethmoidal neuralgia is:

Middle turbinate contact with lateral nasal wall. ***Middle turbinate contact with lateral nasal wall*** - This represents a **mucosal contact point** that leads to chronic irritation of the **anterior ethmoidal nerve** branches. - The middle turbinate may contact the lateral nasal wall due to anatomical variations such as **concha bullosa** (pneumatized middle turbinate), **paradoxical middle turbinate curvature**, or **septal deviation**. - The persistent pressure and inflammation in this region cause anterior ethmoidal neuralgia (Charlin's syndrome), manifesting as pain in the **forehead**, **nasal bridge**, and **medial canthal/orbital region**. *Superior turbinate causing nasal pain* - The superior turbinate is less frequently implicated in neuralgia due to its location and nerve supply, which is primarily from the **posterior ethmoidal nerve**. - While it can cause nasal symptoms, **pain syndromes** specifically linked to superior turbinate contact are rare and would not cause anterior ethmoidal neuralgia. *Obstruction of sphenoid sinus opening* - Obstruction of the sphenoid sinus opening typically causes **sphenoid sinusitis**, leading to pain in the **vertex of the head** or deep behind the eyes. - This is distinct from anterior ethmoidal neuralgia, which predominantly affects the **anterior part of the face**, medial canthus, and orbit. *Inferior turbinate causing nasal pain* - The inferior turbinate is innervated by branches from the **maxillary division of the trigeminal nerve (V2)**, specifically the **nasopalatine nerve** and **greater palatine nerve**. - While inflammation or enlargement can cause nasal obstruction and pressure, it is not directly associated with anterior ethmoidal neuralgia, which is specifically linked to the **anterior ethmoidal nerve** (branch of nasociliary nerve from V1).

Q: Atrophic dry nasal mucosa, extensive encrustations, and a woody hard external nose are suggestive of:

Rhinoscleroma. ***Rhinoscleroma*** - This chronic granulomatous disease, caused by **Klebsiella rhinoscleromatis**, characteristically leads to **atrophic dry nasal mucosa**, extensive **encrustations**, and a classic **"woody hard" external nose** (Hephaestic nose) due to fibrosis. - The disease progresses through catarrhal, atrophic, and tumorous stages, with the atrophic stage being relevant to the described mucosal changes. *Paget's disease* - Characterized by abnormal bone remodeling, leading to bone pain, deformities, and fractures, primarily affecting the **skull, spine, pelvis, and long bones**. - It does not present with primary nasal mucosal dryness or encrustations. *Cherubism* - A rare genetic disorder causing painless, bilateral swelling of the jaws and cheeks, giving a **"cherubic" facial appearance**. - It involves fibrous tissue replacement of bone in the mandible and maxilla and does not affect the nasal mucosa in the way described. *Localized osteomyelitis* - Refers to a **bacterial infection of the bone**, which can affect the nasal bones, but it typically presents with pain, swelling, erythema, and purulent discharge. - While it could lead to bone destruction, it does not typically cause the triad of atrophic dry nasal mucosa, extensive encrustations, and a woody hard external nose.

Question 1

Mucoperichondrial flap in septoplasty is made on?

Accepted Answer

Septal cartilage

Answer

Alar cartilage

Answer

Maxillary spine

Answer

Sphenoid spine

Question 2

What is Little's area, also known as Kiesselbach's plexus?

Accepted Answer

Anteroinferior nasal septum

Answer

Anteroinferior lateral wall

Answer

Posteroinferior lateral wall

Answer

Posteroinferior nasal septum

Question 3

Paranasal sinuses are affected by both benign and malignant neoplasms. What are the commonest benign tumors of the paranasal sinuses?

Accepted Answer

Osteomas

Answer

Angiofibroma

Answer

Adenocarcinoma

Answer

Burkitt's lymphoma

Question 4

Atrophic rhinitis is caused by:

Accepted Answer

Klebsiella pneumoniae

Answer

Herpes virus

Answer

Pneumococcus

Answer

Staphylococcus aureus

Question 5

Which of the following statements about juvenile angiofibroma is incorrect?

Accepted Answer

Biopsy for diagnosis

Answer

Surgical excision

Answer

Second decade

Answer

Benign tumor

Question 6

Ohngren's classification is used for:

Accepted Answer

Maxillary sinus carcinoma

Answer

Nasopharyngeal carcinoma

Answer

Oropharyngeal carcinoma

Answer

Tongue carcinoma

Question 7

A boy has developed epistaxis. What is the treatment of choice?

Accepted Answer

Digital pressure

Answer

Cauterization of vessels

Answer

Surgical ligation

Answer

Nasal packing

Question 8

Osteomas are common in which of the following sinuses?

Accepted Answer

Frontal

Answer

Ethmoid

Answer

Maxillary

Answer

Sphenoid

Question 9

The etiology of anterior ethmoidal neuralgia is:

Accepted Answer

Middle turbinate contact with lateral nasal wall

Answer

Superior turbinate causing nasal pain

Answer

Obstruction of sphenoid sinus opening

Answer

Inferior turbinate causing nasal pain

Question 10

Atrophic dry nasal mucosa, extensive encrustations, and a woody hard external nose are suggestive of:

Accepted Answer

Rhinoscleroma

Answer

Paget's disease

Answer

Cherubism

Answer

Localized osteomyelitis

Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses — MCQs

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