Diseases of the Nose and Paranasal Sinuses Practice Questions

Q: Rhinitis sicca involves which part of the nasal cavity?

Septum. **Explanation:** **Rhinitis sicca** is a chronic inflammatory condition characterized by extreme dryness of the nasal mucosa. The correct answer is **Septum** because the disease primarily affects the **anterior part of the nasal septum** (Little’s area). 1. **Why the Septum is Correct:** In Rhinitis sicca, the ciliated columnar epithelium undergoes squamous metaplasia due to environmental factors (dust, hot/dry climates) or occupational exposure. The anterior septum is the most exposed area to inspired air and turbulence. This leads to the formation of thin, dry, adherent crusts. When these crusts are picked or shed, they often cause epistaxis or may eventually lead to a septal perforation. 2. **Why other options are incorrect:** * **Anterior nares:** While the disease occurs near the front of the nose, it specifically targets the mucosal lining of the septum rather than the skin-lined vestibule (anterior nares). * **Posterior wall:** This area is well-protected, humidified, and rarely affected by the localized drying process seen in Rhinitis sicca. * **Lateral wall:** While the turbinates can be involved in generalized Atrophic Rhinitis, Rhinitis sicca is a localized form specifically localized to the septum. **Clinical Pearls for NEET-PG:** * **Key Distinction:** Unlike *Atrophic Rhinitis*, Rhinitis sicca does **not** present with a "merciful anosmia" (foul odor/ozaena) or significant atrophy of the turbinates. * **Predisposing Factors:** Common in bakers, goldsmiths, and those working in hot, dusty environments. * **Management:** Treatment involves alkaline nasal douches and the application of lubricating ointments (e.g., 25% glucose in glycerin) to the septum. * **High-Yield Association:** Recurrent crusting in Rhinitis sicca is a common precursor to **idiopathic septal perforation**.

Q: Complications of paranasal sinusitis include all except?

Nasal furuncles. **Explanation:** The correct answer is **Nasal furuncles**. **1. Why Nasal Furuncles is the correct answer:** A nasal furuncle is an acute localized infection (usually staphylococcal) of a hair follicle in the **nasal vestibule**. The nasal vestibule is lined by skin, not respiratory mucosa. Therefore, a furuncle is a primary infection of the external nose/skin and **not a complication** arising from the paranasal sinuses. In fact, a nasal furuncle can lead to complications like cavernous sinus thrombosis, but it is never caused by sinusitis. **2. Analysis of Incorrect Options (Actual Complications):** * **Orbital Cellulitis:** This is the **most common** complication of acute sinusitis (especially ethmoiditis) due to the thinness of the *lamina papyracea*, which allows infection to spread easily from the sinuses to the orbit. * **Seizure:** This occurs as a result of **intracranial complications** such as meningitis, brain abscess (most common in the frontal lobe from frontal sinusitis), or subdural empyema. These conditions irritate the cerebral cortex, triggering seizures. * **Cavernous Sinus Thrombosis (CST):** This is a life-threatening inflammatory thrombosis of the cavernous sinus, usually resulting from the retrograde spread of infection from the ethmoid or sphenoid sinuses via the ophthalmic veins. **Clinical Pearls for NEET-PG:** * **Most common complication of sinusitis:** Orbital complications (specifically Preseptal/Orbital cellulitis). * **Most common sinus involved in orbital complications:** Ethmoid sinus (in children) and Frontal sinus (in adults). * **Pott’s Puffy Tumor:** A high-yield term referring to osteomyelitis of the frontal bone with overlying soft tissue edema, seen as a complication of frontal sinusitis. * **Chandler’s Classification:** Used to grade the severity of orbital complications of sinusitis.

Q: What is the current treatment of choice for a large antrochoanal polyp in a 30-year-old man?

Functional endoscopic sinus surgery (FESS). ### Explanation **Correct Option: C. Functional Endoscopic Sinus Surgery (FESS)** The current gold standard for treating an antrochoanal polyp (ACP) is **Functional Endoscopic Sinus Surgery (FESS)**. An ACP typically originates from the maxillary sinus mucosa (near the accessory ostium), passes through the natural or accessory ostium into the middle meatus, and extends posteriorly toward the choana. FESS is preferred because it allows for precise visualization and complete removal of the polyp, including its **antral attachment site**, which is crucial to prevent recurrence. It is minimally invasive, preserves the sinus physiology, and avoids the complications associated with more radical procedures. **Why other options are incorrect:** * **A. Intranasal polypectomy:** This involves simple snare removal of the nasal portion. It has a very high recurrence rate because the stalk and the antral component are left behind. * **B. Caldwell-Luc operation:** Historically used to remove the antral portion via the canine fossa. While effective, it is now considered second-line or reserved for recurrent cases because it is more invasive and carries risks like infraorbital nerve injury and dental damage. * **D. Lateral rhinotomy:** This is a radical external approach used for malignant tumors or extensive benign lesions (like Inverted Papilloma). It is unnecessarily morbid for a benign ACP. **High-Yield Clinical Pearls for NEET-PG:** * **Origin:** ACPs most commonly arise from the **posterior/lateral wall** of the maxillary sinus. * **Radiology:** On CT, they show a "dumbbell-shaped" mass widening the maxillary ostium. * **Killian’s Polyp:** Another name for an Antrochoanal polyp. * **Differential:** In a young male with a posterior nasal mass, always rule out **Juvenile Nasopharyngeal Angiofibroma (JNA)** before biopsy (JNA is highly vascular).

Q: A two-year-old child with a history of purulent nasal discharge and fever presents with conjunctival congestion and edema. His temperature is 102-103°F and WBC count is 12,000. The culture of eye discharge was negative, and X-rays show opacification of the ethmoid sinus. What is the next step in evaluating this patient?

CT Scan. **Explanation:** The clinical presentation of a child with fever, purulent nasal discharge, ethmoid opacification, and ocular symptoms (conjunctival congestion and edema) is highly suggestive of **Orbital Complications of Acute Sinusitis**. In children, the ethmoid sinus is the most common source of orbital infection due to the thinness of the *lamina papyracea*. **Why CT Scan is the correct answer:** The primary goal in this scenario is to differentiate between **Preseptal Cellulitis** (managed medically) and **Orbital Cellulitis/Abscess** (which may require surgical intervention). A **Contrast-Enhanced CT (CECT) of the Orbits and Paranasal Sinuses** is the gold standard for evaluating the extent of the disease, identifying subperiosteal abscesses, and planning surgical drainage. It is the immediate next step when ocular signs (edema/congestion) appear in the context of sinusitis. **Why other options are incorrect:** * **Blood Culture:** While useful for systemic management, it does not help in staging the orbital complication or determining the need for surgery. * **Urine Culture:** Irrelevant to the diagnosis of sinusitis or its orbital complications. * **Repeat Eye Discharge Culture:** Often negative (as seen here) because the infection is deep within the orbital tissues or sinuses, not a primary superficial conjunctivitis. **Clinical Pearls for NEET-PG:** * **Chandler’s Classification:** Used to stage orbital complications (I: Preseptal, II: Orbital cellulitis, III: Subperiosteal abscess, IV: Orbital abscess, V: Cavernous sinus thrombosis). * **Most common sinus involved:** Ethmoid (in children); Frontal (in adults). * **Red Flags:** Proptosis, ophthalmoplegia (restricted eye movement), and decreased visual acuity indicate a transition from preseptal to orbital involvement, necessitating urgent imaging.

Q: Which cyst is located at the junction of the median nasal process, lateral nasal process, and maxillary process?

Nasoalveolar cyst. ### Explanation **Correct Option: D. Nasoalveolar cyst (also known as Nasolabial cyst)** The **Nasoalveolar cyst** is a non-odontogenic, soft-tissue cyst. It originates from the entrapment of epithelial remnants at the site of fusion between three processes: the **median nasal process**, the **lateral nasal process**, and the **maxillary process**. * **Clinical Presentation:** It typically presents as a slowly enlarging, painless swelling in the nasolabial fold, often causing ala flare or bulging into the nasal vestibule and labio-gingival sulcus. Unlike other cysts in this region, it is primarily a **soft-tissue cyst** and does not usually show radiolucency on X-rays unless it causes pressure erosion of the underlying bone. **Why other options are incorrect:** * **A. Globulomaxillary cyst:** Historically described as occurring at the junction of the globular and maxillary processes (between the lateral incisor and canine). It is an intraosseous cyst, appearing as an inverted "pear-shaped" radiolucency. * **B. Median palatine cyst:** Located in the midline of the hard palate, posterior to the incisive canal. It results from epithelial entrapment during the fusion of the lateral palatine shelves. * **C. Nasopalatine cyst (Incisive canal cyst):** The most common non-odontogenic cyst of the maxilla. It is located in the midline of the anterior palate within the incisive canal and presents as a "heart-shaped" radiolucency. **High-Yield Clinical Pearls for NEET-PG:** * **Klestsadt’s Cyst:** Another name for the Nasoalveolar cyst. * **Bimanual Palpation:** This cyst can be felt with one finger in the nasal vestibule and another in the gingivolabial sulcus (fluctuant swelling). * **Treatment:** Surgical excision via a sublabial (Caldwell-Luc) approach is the treatment of choice. * **Key Differentiator:** Nasoalveolar cyst is **extra-osseous** (soft tissue), whereas the others listed are **intra-osseous** (bony).

Q: What is the most common site for an ivory osteoma?

Frontal-ethmoidal region. **Explanation:** **Osteoma** is a benign, slow-growing, osteogenic lesion composed of mature compact (ivory) or cancellous bone. It is the most common benign tumor of the paranasal sinuses. 1. **Why Frontal-ethmoidal region is correct:** The majority of osteomas occur in the **paranasal sinuses**, with the **frontal sinus** being the most common site (approx. 80%), followed by the **ethmoid sinus**. These tumors are often asymptomatic and discovered incidentally on imaging. When they occur in the skull or facial bones, they are typically of the "ivory" variety—extremely dense, radiopaque bone resembling elephant tusks. 2. **Why other options are incorrect:** * **Mandible & Maxilla:** While osteomas can occur in the jaw (often associated with Gardner’s Syndrome), they are significantly less common here than in the frontal-ethmoidal complex. * **Sphenoid:** The sphenoid and maxillary sinuses are much rarer sites for osteoma compared to the frontal and ethmoid regions. **NEET-PG High-Yield Pearls:** * **Gardner’s Syndrome:** If a patient presents with multiple osteomas (especially of the mandible), look for **colonic polyposis**, soft tissue tumors (desmoids), and supernumerary teeth. * **Radiology:** On X-ray/CT, an ivory osteoma appears as a very dense, homogeneous, "bone-hard" radiopaque mass with smooth margins. * **Management:** Asymptomatic lesions are usually managed with observation. Surgery is indicated only if the tumor causes obstruction of the sinus ostium (leading to sinusitis or mucocele) or orbital/cranial complications.

Q: A child presents with an expansile swelling on the medial side of the nose. What is the likely diagnosis?

Meningocele. **Explanation:** The clinical presentation of an **expansile swelling on the medial side of the nose** in a child is a classic description of a **Meningocele** (or Encephalocele). These are congenital herniations of cranial contents through a defect in the skull base, most commonly occurring at the **foramen caecum**. **Why Meningocele is correct:** Nasal encephaloceles/meningoceles are typically located at the bridge of the nose, often appearing as a bluish, pulsatile, and compressible mass on the medial aspect of the orbit or the nasal dorsum. A key diagnostic feature is the **Furstenberg test**, where compression of the internal jugular vein leads to an increase in the size and tension of the swelling due to increased intracranial pressure. **Why the other options are incorrect:** * **Dermoid Cyst:** While also a common midline nasal mass, it is typically **non-pulsatile** and does not expand with crying or jugular compression (negative Furstenberg test). It often presents with a skin pit or hair follicle. * **Teratoma:** These are rare, complex germ cell tumors. While they can occur in the head and neck (Epignathus), they are usually much larger, more heterogeneous, and present with significant airway obstruction rather than a simple medial nasal swelling. * **Lipoma:** These are soft, fatty tumors that are rare in the pediatric nasal region and do not show the "expansile" characteristics associated with intracranial communication. **High-Yield Clinical Pearls for NEET-PG:** 1. **Never biopsy** a midline nasal mass in a child until an intracranial communication is ruled out via CT/MRI to avoid a CSF leak or meningitis. 2. **Glioma:** A "sequestered" encephalocele that has lost its intracranial connection. It is firm, non-compressible, and does not transilluminate. 3. **Radiology:** MRI is the gold standard to visualize the soft tissue connection to the brain; CT is best for evaluating the bony defect at the skull base.

Q: Simultaneous thrombosis of both cavernous sinuses usually occurs in which condition?

Diseases of the sphenoid sinuses. **Explanation:** **1. Why Option A is Correct:** The cavernous sinuses are paired dural venous sinuses located on either side of the sella turcica. The **sphenoid sinus** lies directly inferior and medial to these sinuses, separated only by a thin bony wall. Because the sphenoid sinus is a midline structure, an infection (sphenoid sinusitis) can easily erode through the thin bone or spread via small valveless veins to involve **both** cavernous sinuses simultaneously. This direct anatomical proximity makes sphenoid sinus disease the most common cause of bilateral involvement. **2. Why Other Options are Incorrect:** * **B. Septic wounds of the face:** Infections in the "danger area" of the face (e.g., furuncles) typically spread via the angular and ophthalmic veins. This usually results in **unilateral** cavernous sinus thrombosis (CST) initially, though it may spread to the other side later via the intercavernous sinuses. * **C. Pyogenic meningitis:** While meningitis can be a complication of CST, it is rarely the primary cause of simultaneous bilateral thrombosis. * **D. Cerebral abscess:** This is typically a localized collection of pus within the brain parenchyma. While it can lead to elevated intracranial pressure or focal deficits, it does not typically cause primary cavernous sinus thrombosis. **High-Yield Clinical Pearls for NEET-PG:** * **Danger Area of the Face:** Area bounded by the upper lip, columella, and lateral aspects of the nose; drains into the cavernous sinus via the **ophthalmic veins**. * **Clinical Presentation:** Chemosis, proptosis, and ophthalmoplegia (CN III, IV, VI involvement). **CN VI (Abducens)** is usually the first nerve affected because it runs centrally through the sinus. * **Diagnosis:** Contrast-enhanced MRI (MRV) is the gold standard. * **Treatment:** High-dose intravenous antibiotics and anticoagulation to prevent thrombus propagation.

Q: Which of the following is true about rhinosporidiosis?

Presents as a nasal polyp. **Explanation:** Rhinosporidiosis is a chronic granulomatous infection caused by **Rhinosporidium seeberi**. Although previously classified as a fungus, it is now identified as an aquatic parasite (Mesomycetozoea). **Why Option C is Correct:** The hallmark clinical presentation of rhinosporidiosis is a **leafy, polypoid, friable mass** in the nasal cavity. These masses are typically vascular, pedunculated, and have a characteristic **"strawberry-like" appearance** due to the presence of mature sporangia visible as white dots on the surface. **Analysis of Incorrect Options:** * **Option A:** *Klebsiella rhinoscleromatis* is the causative agent of **Rhinoscleroma**, not rhinosporidiosis. Rhinoscleroma is characterized by "woody hard" granulomas and Mikulicz cells. * **Option B:** Rhinosporidiosis is **not** an opportunistic infection. It is typically seen in immunocompetent individuals, particularly those with a history of bathing in stagnant water (ponds/tanks) where the organism resides. * **Option C:** *Rhinosporidium seeberi* has **never been successfully cultured** in vitro. Diagnosis relies on clinical appearance and histopathology showing large, thick-walled **sporangia** containing thousands of endospores. **High-Yield Clinical Pearls for NEET-PG:** * **Epidemiology:** Most common in South India (Tamil Nadu, Kerala) and Sri Lanka. * **Site:** The nasal septum and floor of the nose are the most common sites. * **Histology:** H&E stain shows sporangia; GMS and PAS stains are also used. * **Treatment:** Wide surgical excision using **diathermy** (to prevent bleeding and seeding) followed by a course of **Dapsone** to prevent recurrence.

Question 1

Rhinitis sicca involves which part of the nasal cavity?

Accepted Answer

Septum

Answer

Anterior nares

Answer

Posterior wall

Answer

Lateral wall

Question 2

Complications of paranasal sinusitis include all except?

Accepted Answer

Nasal furuncles

Answer

Orbital cellulitis

Answer

Seizure

Answer

Cavernous sinus thrombosis

Question 3

DNS may be associated with all the following except?

Accepted Answer

Recurrent sphenoiditis

Answer

Acute otitis media

Answer

Hypertrophy of the inferior turbinate

Answer

Recurrent maxillary sinusitis

Question 4

What is the current treatment of choice for a large antrochoanal polyp in a 30-year-old man?

Accepted Answer

Functional endoscopic sinus surgery (FESS)

Answer

Intranasal polypectomy

Answer

Caldwell-Luc operation

Answer

Lateral rhinotomy and excision

Question 5

A two-year-old child with a history of purulent nasal discharge and fever presents with conjunctival congestion and edema. His temperature is 102-103°F and WBC count is 12,000. The culture of eye discharge was negative, and X-rays show opacification of the ethmoid sinus. What is the next step in evaluating this patient?

Accepted Answer

CT Scan

Answer

Urine Culture

Answer

Blood culture

Answer

Repeat culture of eye discharge

Question 6

Which cyst is located at the junction of the median nasal process, lateral nasal process, and maxillary process?

Accepted Answer

Nasoalveolar cyst

Answer

Globulomaxillary cyst

Answer

Median palatine cyst

Answer

Nasopalatine cyst

Question 7

What is the most common site for an ivory osteoma?

Accepted Answer

Frontal-ethmoidal region

Answer

Mandible

Answer

Maxilla

Answer

Sphenoid

Question 8

A child presents with an expansile swelling on the medial side of the nose. What is the likely diagnosis?

Accepted Answer

Meningocele

Answer

Teratoma

Answer

Dermoid cyst

Answer

Lipoma

Question 9

Simultaneous thrombosis of both cavernous sinuses usually occurs in which condition?

Accepted Answer

Diseases of the sphenoid sinuses

Answer

Septic wounds of the face

Answer

Pyogenic meningitis

Answer

Patients with cerebral abscess

Question 10

Which of the following is true about rhinosporidiosis?

Accepted Answer

Presents as a nasal polyp

Answer

The most common organism is Klebsiella rhinoscleromatis

Answer

Seen only in immunocompromised patients

Answer

Can be diagnosed by isolation of the organism

Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses — MCQs

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