Diseases of the Nose and Paranasal Sinuses Practice Questions

Q: Frontal headache is due to inflammation of which sinus?

Frontal. ***Frontal*** - Inflammation of the **frontal sinuses** typically causes pain and pressure over the forehead, known as a **frontal headache**. - The pain is often worse in the morning, when bending over, or with changes in **barometric pressure**. *Sphenoid* - **Sphenoid sinusitis** usually causes a headache behind the eyes, at the **vertex of the head**, or in the occipital region. - It is less common than other forms of sinusitis and often presents with more diffuse, deep-seated pain. *Ethmoidal* - **Ethmoidal sinusitis** typically results in pain and pressure between the eyes or over the **bridge of the nose**. - It can also cause eye pain and is sometimes mistaken for a **tension headache**. *Maxillary* - **Maxillary sinusitis** commonly causes pain and pressure in the cheeks, under the eyes, and in the upper teeth, often exacerbated by **chewing or biting**. - This pain can radiate to the temples or ears, but it typically does not manifest as a **frontal headache**.

Q: Most common malignancy of maxillary antrum:

Squamous cell Carcinoma. ***Squamous cell Carcinoma*** - **Squamous cell carcinoma (SCC)** accounts for approximately **80% of all malignant tumors** of the maxillary antrum. - This prevalence is due to the **squamous metaplasia** of the respiratory epithelium lining the sinus, especially in response to chronic irritation or inflammation. *Mucoepidermoid Carcinoma* - While it can occur in the maxillary sinus, **mucoepidermoid carcinoma** is a rare tumor, typically arising from **minor salivary glands**. - It is far **less common** than squamous cell carcinoma in the maxillary antrum. *Adenoid cystic Carcinoma* - **Adenoid cystic carcinoma** is a relatively rare tumor that more commonly affects the **major and minor salivary glands** and is known for its **perineural invasion** and slow growth, but it is not the most common in the maxillary antrum. - Its presence in the maxillary sinus is usually an **extension from adjacent structures** or a primary tumor of minor salivary glands within the sinus. *Adenocarcinoma* - **Adenocarcinoma** of the maxillary antrum is less common than SCC, often associated with exposure to **wood dust** or **leather processing**. - It typically arises from **seromucinous glands** within the sinus lining, but its incidence is significantly lower than that of squamous cell carcinoma.

Q: A young boy came to OPD with complaints of difficulty in breathing. On examination, bilateral polyps were found. On aspiration, bleeding was seen. What will be the initial management?

Topical corticosteroids. ***Topical corticosteroids*** - **Topical corticosteroids** are the **first-line medical management** for **nasal polyps**, helping to reduce inflammation and shrink polyp size. - They work by reducing local inflammation and edema, improving nasal airway patency and breathing. - **Important note**: The presence of **bleeding on aspiration** suggests a **vascular lesion** (such as juvenile nasopharyngeal angiofibroma in young males), which would require **imaging (CT/MRI) before any intervention** and **no biopsy** due to hemorrhage risk. However, if these are inflammatory polyps, topical steroids remain the initial medical management. *Antihistaminic* - **Antihistamines** are not first-line treatment for nasal polyps, as polyps are primarily an **eosinophilic inflammatory condition** rather than a simple IgE-mediated allergic reaction. - While antihistamines may help with associated allergic rhinitis symptoms, they do **not shrink polyps** or address the underlying inflammatory pathology. *Septoplasty* - **Septoplasty** is a surgical procedure to correct a **deviated nasal septum**, not for treating nasal polyps. - This would not address the bilateral polyps causing difficulty in breathing. *I and D* - **Incision and drainage (I&D)** is performed for abscesses or pus collections, which is not the presentation here. - Nasal polyps are benign inflammatory masses, not infectious collections requiring drainage.

Q: Most prominent and largest air cell of ethmoidal sinus?

Bulla ethmoidalis. ***Bulla ethmoidalis*** - The **bulla ethmoidalis** is universally present and is consistently described as the **largest and most prominent** of the anterior ethmoid air cells. - It forms an anatomical landmark that is consistently superior and posterior to the **hiatus semilunaris**. *Onodi cell* - The **Onodi cell** is a posterior ethmoid air cell that pneumatizes laterally and superiorly into the sphenoid bone, in close proximity to the optic nerve. - While clinically significant due to its relationship with the optic nerve, it is not the largest or most prominent ethmoidal air cell. *Haller cell* - A **Haller cell** is an infraorbital ethmoid cell located along the floor of the orbit, extending into the maxillary sinus. - These cells can contribute to **ostial obstruction** of the maxillary sinus but are typically small compared to the bulla ethmoidalis. *Agger nasi cell* - The **agger nasi cell** is the most anterior ethmoid air cell, located in the lacrimal bone anterior to the frontal recess. - It is often one of the first ethmoid cells to pneumatize but is generally small and not considered the most prominent.

Q: Failure of rupture of buccopharyngeal membrane leads to?

Choanal atresia. ***Choanal atresia*** - The **buccopharyngeal membrane** (also called the oronasal or choanal membrane) normally ruptures to establish communication between the nasal cavity and the pharynx. - Failure of this rupture results in a bony or membranous obstruction of the posterior nasal opening (choana). - This presents as **bilateral nasal obstruction in neonates**, which is life-threatening as neonates are obligate nasal breathers. *Epistaxis* - This refers to a **nosebleed**, which is typically caused by trauma, dryness, or underlying blood dyscrasias. - It is not related to the developmental failure of the buccopharyngeal membrane. *Rhinophyma* - This is a feature of advanced **rosacea**, characterized by an enlarged, red, and bulbous nose due to sebaceous gland hypertrophy. - It is a dermatological condition unrelated to embryonic development. *Crooked nose* - A crooked nose usually results from **trauma** or developmental abnormalities of the nasal cartilages and bones. - It is a structural deformity of the external nose and not the internal nasal passages.

Q: CSF rhinorrhea is diagnosed by: MP 07

Beta-2 transferrin. ***Beta-2 transferrin*** - **Beta-2 transferrin** is the **gold standard** for diagnosing CSF rhinorrhea with **high specificity and sensitivity** - It is present **only in CSF, perilymph, and aqueous humor**, making it highly specific for CSF leak diagnosis - While it requires specialized laboratory analysis and may not be immediately available, it remains the **most reliable confirmatory test** - Modern alternatives include **Beta-trace protein**, which also has high specificity *Glucose estimation* - Historically used as a rapid screening test based on the presence of glucose in CSF - **Major limitation**: **Poor specificity** as nasal mucus, tears, and other secretions also contain glucose, leading to frequent false positives - A positive glucose test is suggestive but **not diagnostic** and requires confirmation with more specific tests - No longer considered the primary diagnostic method due to high false-positive rates *Halo sign* - The **halo sign** (or double ring sign) appears when nasal discharge mixed with blood is placed on filter paper, creating a central blood spot with a clear surrounding ring - **Not specific for CSF** - other watery fluids (tears, saline) mixed with blood can produce similar appearance - Useful as a **bedside screening test** but requires confirmation with biochemical analysis *All of the options* - While multiple tests can be used in the diagnostic workup, they have **different specificities and diagnostic values** - **Beta-2 transferrin** is the definitive diagnostic test, while others serve as screening or supportive tests - Therefore, "All of the options" is incorrect as the question asks for the diagnostic test, which specifically refers to the gold standard

Q: All are true about nasolabial cysts except

Derived from odontogenic epithelium. ***Derived from odontogenic epithelium*** - This statement is **false**, making it the correct answer, as nasolabial cysts are theorized to originate from the **nasolacrimal duct epithelium** or embryonic facial fissures, not odontogenic epithelium. - Cysts derived from **odontogenic epithelium** are typically found within the jawbones or associated with teeth. *They are usually unilateral* - Nasolabial cysts are indeed **unilateral** in the vast majority of cases, presenting as a soft tissue swelling in the nasolabial fold area. - While rare, **bilateral cases** have been reported but are not the typical presentation. *More common in females* - There is a recognized higher prevalence of nasolabial cysts in **females**, often with a female-to-male ratio of 3:1 or 4:1. - The exact reason for this gender predilection is not fully understood. *Present in adults* - Nasolabial cysts typically present in **adults**, most commonly in the fourth to fifth decades of life. - They are rarely seen in **children** or adolescents.

Q: The incidence of malignant transformation in inverted papillomas of the upper respiratory tract is:

5%. ***5%*** - The **incidence of malignant transformation** to squamous cell carcinoma in inverted papillomas ranges from **5% to 15%**, with **5%** representing the lower end of this accepted range. - This transformation risk necessitates complete surgical excision and long-term follow-up for patients with inverted papillomas. - Some references cite the average closer to 10%, but 5% is a commonly reported figure in standard textbooks. *4%* - While 4% is close to the lower bound, it is generally considered slightly below the widely accepted minimum of the **5-15% range** for malignant transformation in inverted papillomas. - The typical range quoted in literature starts at 5%, emphasizing the importance of monitoring for this complication. *2%* - A 2% incidence is too low and does not accurately reflect the known risk of **malignant transformation** in inverted papillomas. - Relying on such a low figure might lead to underestimation of the severity and potential complications of this condition. *0.10%* - An incidence of 0.10% is significantly lower than the established **5-15% range** for malignant transformation of inverted papillomas. - This percentage would be representative of a rare event, whereas transformation to squamous cell carcinoma is a well-recognized and clinically significant risk.

Q: The incidence of the mucocele is lowest in

Sphenoid sinus. ***Sphenoid sinus*** - The **sphenoid sinus** has the **lowest incidence** of mucoceles among all paranasal sinuses, accounting for only **1-2%** of all cases. - Its deeper anatomical location, smaller size, and relatively protected position make obstruction less common. - The wide ostium and direct drainage into the sphenoethmoidal recess contribute to lower rates of obstruction. *Maxillary sinus* - The **maxillary sinus** accounts for approximately **5-10%** of mucoceles, making it the third most common site. - Despite being the largest paranasal sinus, mucoceles are relatively uncommon here due to the wide natural ostium and gravity-assisted drainage. *Ethmoid sinus* - The **ethmoid sinus** is the **second most common** site, accounting for **20-30%** of mucoceles. - Its complex anatomy with multiple small cells and narrow drainage pathways predisposes to obstruction. - Chronic inflammation and anatomical variations frequently lead to ostial blockage and mucus accumulation. *Frontal sinus* - The **frontal sinus** is the **most common** site for mucoceles, representing **60-65%** of all cases. - The long, narrow **frontonasal duct** is particularly prone to obstruction from inflammation, trauma, or previous surgery. - Its anatomical configuration makes it highly susceptible to drainage pathway blockage.

Question 1

Frontal headache is due to inflammation of which sinus?

Accepted Answer

Frontal

Answer

Sphenoid

Answer

Ethmoidal

Answer

Maxillary

Question 2

Most common malignancy of maxillary antrum:

Accepted Answer

Squamous cell Carcinoma

Answer

Muco-epidermoid Carcinoma

Answer

Adenoid cystic Carcinoma

Answer

Adenocarcinoma

Question 3

A young boy came to OPD with complaints of difficulty in breathing. On examination, bilateral polyps were found. On aspiration, bleeding was seen. What will be the initial management?

Accepted Answer

Topical corticosteroids

Answer

Septoplasty

Answer

I and D

Answer

Antihistaminic

Question 4

Most prominent and largest air cell of ethmoidal sinus?

Accepted Answer

Bulla ethmoidalis

Answer

Onodi cell

Answer

Haller cell

Answer

Agger nasi cell

Question 5

Rhinoscleroma, true statement is:

Accepted Answer

Begins at the junction between the stratified squamous epithelium of the vestibule and the respiratory epithelium of the nose

Answer

Common in urban areas with high socioeconomic strata

Answer

Caused by Klebsiella ozonae

Answer

Histopathological picture with Mikulicz cell and the Russell body is not pathognomonic.

Question 6

Failure of rupture of buccopharyngeal membrane leads to?

Accepted Answer

Choanal atresia

Answer

Epistaxis

Answer

Rhinophyma

Answer

Crooked nose

Question 7

CSF rhinorrhea is diagnosed by: MP 07

Accepted Answer

Beta-2 transferrin

Answer

Halo sign

Answer

Glucose estimation

Answer

All of the options

Question 8

All are true about nasolabial cysts except

Accepted Answer

Derived from odontogenic epithelium

Answer

They are usually unilateral

Answer

More common in females

Answer

Present in adults

Question 9

The incidence of malignant transformation in inverted papillomas of the upper respiratory tract is:

Accepted Answer

5%

Answer

4%

Answer

2%

Answer

0.10%

Question 10

The incidence of the mucocele is lowest in

Accepted Answer

Sphenoid sinus

Answer

Ethmoid sinus

Answer

Frontal sinus

Answer

Maxillary sinus

Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses — MCQs

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