Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses Indian Medical PG Practice Questions and MCQs

Question 11: A 10-year-old boy presents with nasal obstruction and intermittent profuse epistaxis. He has a firm pinkish mass in the nasopharynx. Which of the following investigations is NOT indicated in this case?

A. X-ray base of skull
B. Carotid angiography
C. CT scan
D. Biopsy (Correct Answer)

Explanation: **Explanation:** The clinical presentation of a **10-year-old boy** with **nasal obstruction** and **intermittent profuse epistaxis**, coupled with a **firm pinkish mass** in the nasopharynx, is a classic textbook description of **Juvenile Nasopharyngeal Angiofibroma (JNA)**. **Why Biopsy is NOT indicated:** JNA is a benign but locally aggressive, **highly vascular tumor**. Performing a biopsy in an outpatient or uncontrolled setting is **strictly contraindicated** because it can trigger torrential, life-threatening hemorrhage. The diagnosis is primarily clinical and radiological; a biopsy is only considered if the diagnosis is in doubt, and even then, only in an operating room under general anesthesia with preparations for blood transfusion. **Analysis of other options:** * **X-ray base of skull:** Historically used to look for the **"Holman-Miller Sign"** (antral sign), which is the anterior bowing of the posterior wall of the maxillary sinus. * **Carotid angiography:** Essential to identify the feeding vessel (most commonly the **Internal Maxillary Artery**) and is often performed simultaneously with **pre-operative embolization** to reduce intraoperative bleeding. * **CT scan:** The investigation of choice to assess the extent of the tumor and bone involvement (e.g., erosion of the pterygoid plates). **High-Yield Clinical Pearls for NEET-PG:** * **Demographics:** Occurs almost exclusively in **adolescent males** (testosterone-dependent). * **Origin:** Usually the sphenopalatine foramen. * **Pathognomonic Sign:** Holman-Miller Sign on imaging. * **Gold Standard Investigation:** Contrast-enhanced CT (CECT) and MRI. * **Treatment of Choice:** Surgical excision (usually via endoscopic or transpalatal approaches) following embolization.

Question 12: CSF rhinorrhoea is due to the fracture of which of the following?

A. Nasal bones
B. Cribriform plate (Correct Answer)
C. Temporal bone
D. Maxillary bone

Explanation: **Explanation:** **CSF Rhinorrhoea** occurs when there is a breach in the barriers separating the subarachnoid space from the nasal cavity (dura mater, arachnoid mater, and the bony skull base). * **Why the Cribriform Plate is Correct:** The cribriform plate of the ethmoid bone is the thinnest part of the anterior skull base. It is intimately associated with the olfactory bulbs and the overlying dura. Because of its extreme fragility and its position forming the roof of the nasal cavity, fractures in this area frequently result in dural tears, leading to the leakage of Cerebrospinal Fluid (CSF) into the nose. This is the most common site for spontaneous and traumatic CSF leaks. **Analysis of Incorrect Options:** * **Nasal bones:** Fractures here involve the external framework of the nose. While they cause epistaxis and deformity, they do not involve the cranial vault or dural layers. * **Temporal bone:** Fractures of the petrous part of the temporal bone typically lead to **CSF Otorrhoea** (leakage through the ear). While CSF can reach the nose via the Eustachian tube (paradoxical rhinorrhoea), it is not the primary site for direct rhinorrhoea. * **Maxillary bone:** These fractures (e.g., Le Fort types) involve the midface and palate. While they can coexist with skull base injuries, a simple maxillary fracture does not communicate with the subarachnoid space. **Clinical Pearls for NEET-PG:** * **Biochemical Marker:** **Beta-2 Transferrin** is the most specific and gold-standard investigation to confirm the fluid is CSF. * **Target Sign/Halo Sign:** On a paper or linen sheet, CSF forms a clear outer ring around a central spot of blood. * **Management:** Most traumatic leaks settle with conservative management (bed rest, head elevation, avoiding straining). If persistent, endonasal endoscopic repair is the preferred surgical approach.

Question 13: Esthesioneuroblastoma arises from which of the following structures?

A. Olfactory epithelium (Correct Answer)
B. Ethmoid sinus
C. Maxillary sinus
D. Sphenoid sinus

Explanation: **Explanation:** **Esthesioneuroblastoma**, also known as **Olfactory Neuroblastoma**, is a rare malignant neuroectodermal tumor. 1. **Why Olfactory Epithelium is correct:** The tumor originates from the specialized **sensory neuroepithelium of the olfactory mucosa**. This epithelium is located in the upper part of the nasal cavity, specifically in the area of the cribriform plate, the superior turbinate, and the upper third of the nasal septum. Because it arises from neural crest cells, it is classified as a neuroendocrine tumor. 2. **Why other options are incorrect:** * **Ethmoid, Maxillary, and Sphenoid Sinuses:** While an esthesioneuroblastoma can secondarily invade these paranasal sinuses as it grows, it does not *arise* from the respiratory epithelium that lines them. These sinuses are more commonly the primary sites for Squamous Cell Carcinoma or Inverted Papilloma. **High-Yield Clinical Pearls for NEET-PG:** * **Bimodal Age Distribution:** It typically shows two peaks of incidence—one in the 2nd decade (teens) and another in the 6th decade (50s). * **Clinical Presentation:** Most common symptoms are unilateral nasal obstruction and epistaxis. Anosmia (loss of smell) is a classic finding due to the involvement of the olfactory region. * **Histopathology:** Look for **Homer-Wright rosettes** (pseudorosettes), which are characteristic of neuroblastoma-type tumors. * **Immunohistochemistry (IHC):** The tumor cells are typically positive for **S-100** (at the periphery of nests), **Neuron-Specific Enolase (NSE)**, Synaptophysin, and Chromogranin. * **Staging:** The **Kadish Staging System** is specifically used to stage this tumor. * **Radiology:** On MRI, it often shows a "dumbbell-shaped" mass crossing the cribriform plate.

Question 14: A 13-year-old boy presented with cheek swelling and recurrent epistaxis. What is the most likely diagnosis?

A. Angiofibroma (Correct Answer)
B. Carcinoma of the nasopharynx
C. Rhabdomyosarcoma
D. None of the above

Explanation: ### Explanation **Correct Answer: A. Angiofibroma (Juvenile Nasopharyngeal Angiofibroma - JNA)** The clinical triad of a **young adolescent male** (13 years old), **recurrent profuse epistaxis**, and a **cheek swelling** is a classic presentation of Juvenile Nasopharyngeal Angiofibroma. * **Pathophysiology:** JNA is a benign but locally aggressive, highly vascular tumor. It typically arises from the superior margin of the sphenopalatine foramen. * **Clinical Reasoning:** The tumor often spreads laterally through the pterygopalatine fossa into the infratemporal fossa. This expansion causes the characteristic "cheek swelling" (frog-face deformity). Because it is highly vascular and lacks a true capsule, it presents with spontaneous, severe epistaxis. **Analysis of Incorrect Options:** * **B. Carcinoma of the nasopharynx:** While it can cause epistaxis and nasal obstruction, it is rare in young children and more commonly presents with cervical lymphadenopathy and serous otitis media (due to Eustachian tube blockage). * **C. Rhabdomyosarcoma:** This is the most common soft tissue sarcoma in children. While it can occur in the head and neck, it usually presents as a rapidly growing, painful mass rather than recurrent profuse epistaxis. **NEET-PG High-Yield Pearls:** * **Demographics:** Exclusively seen in adolescent males (testosterone-dependent). * **Radiology:** **Holman-Miller sign** (Antral sign) is pathognomonic—it is the anterior bowing of the posterior wall of the maxillary sinus seen on CT/MRI. * **Diagnosis:** **Biopsy is contraindicated** in the OPD due to the risk of torrential hemorrhage. Diagnosis is primarily clinical and radiological. * **Treatment of Choice:** Surgical excision (usually preceded by preoperative embolization to reduce blood loss).

Question 15: What is true about inverted papilloma?

A. It is also known as Schnedrian papilloma. (Correct Answer)
B. Anatomically, it has an inverted appearance.
C. It may cause basal cell carcinoma.
D. It is commonly seen in young girls.

Explanation: ### Explanation: Inverted Papilloma **1. Why Option A is Correct:** Inverted papilloma (IP) arises from the **Schneiderian membrane**, which is the ectodermally derived pseudostratified ciliated columnar epithelium lining the nasal cavity and paranasal sinuses. Hence, it is also known as a **Schneiderian papilloma**. It is a true neoplasm, not a simple inflammatory polyp. **2. Analysis of Incorrect Options:** * **Option B:** The term "inverted" refers to its **histological** appearance, not its anatomical or gross appearance. Microscopically, the surface epithelium proliferates and invaginates (grows inward) into the underlying stroma, rather than growing outward (exophytic). * **Option C:** While IP is locally aggressive and has a high recurrence rate, its primary malignant association is with **Squamous Cell Carcinoma (SCC)**, not basal cell carcinoma. Malignant transformation occurs in approximately 5–15% of cases. * **Option D:** Inverted papilloma typically affects **males** (M:F ratio of 3:1) in the **40–60 year** age group. It is rare in children and young girls. **3. High-Yield Clinical Pearls for NEET-PG:** * **Site of Origin:** Most commonly the **lateral wall of the nose** (middle meatus/ethmoid sinus). * **Clinical Presentation:** Unilateral nasal obstruction and epistaxis. * **Radiology:** CT scans show a unilateral soft tissue mass; a characteristic finding is **focal hyperostosis** (bony thickening) at the site of origin, which helps the surgeon identify the attachment point. * **Management:** The treatment of choice is **complete surgical excision** (usually via Endoscopic Sinus Surgery or Medial Maxillectomy) because of its high recurrence rate and malignant potential.

Question 16: What are the indications for Functional Endoscopic Sinus Surgery (FESS)?

A. Inverted papilloma
B. Orbital abscess
C. Nasal polyposis
D. All of the above (Correct Answer)

Explanation: **Explanation:** Functional Endoscopic Sinus Surgery (FESS) is the primary surgical modality for managing various pathologies of the nose and paranasal sinuses. The core philosophy of FESS is to restore the natural ventilation and drainage of the sinuses while preserving the normal anatomy and mucosa. **Why "All of the Above" is correct:** 1. **Nasal Polyposis:** This is the most common indication for FESS. When medical management (steroids) fails to control Chronic Rhinosinusitis with Nasal Polyps (CRSwNP), FESS is performed to remove polyps and open the osteomeatal complex. 2. **Orbital Abscess:** This is a Grade III/IV complication of acute sinusitis (Chandler’s classification). FESS is indicated for urgent surgical drainage of the abscess and the underlying infected sinus to prevent permanent vision loss. 3. **Inverted Papilloma:** While traditionally managed via lateral rhinotomy, endoscopic resection (FESS) is now the gold standard for most cases. It allows for precise removal of the tumor from its attachment point with lower morbidity. **High-Yield Clinical Pearls for NEET-PG:** * **The "Gateway" to FESS:** The **Uncinate Process** is the first structure removed during FESS (Uncinectomy) to visualize the hiatus semilunaris. * **Messerklinger Technique:** The most common approach used in FESS, focusing on the osteomeatal unit. * **Other Indications:** CSF rhinorrhea repair, Dacryocystorhinostomy (DCR), optic nerve decompression, and pituitary tumor excision (Transsphenoidal approach). * **Major Complication:** Injury to the **Lamina Papyracea** (leading to orbital hematoma) or the **Cribriform Plate** (leading to CSF leak). Always check for the "Fat Pad Sign" if the lamina is breached.

Question 17: Which of the following is NOT a symptom of sinusitis?

A. Blood-stained rhinorrhea
B. Facial edema
C. Nasal blockage
D. Diplopia (Correct Answer)

Explanation: **Explanation:** Sinusitis is the inflammation of the mucosal lining of the paranasal sinuses. The diagnosis is primarily clinical, based on major and minor criteria. **Why Diplopia is the Correct Answer:** Diplopia (double vision) is **not** a standard symptom of uncomplicated sinusitis. While the sinuses are anatomically adjacent to the orbit, diplopia only occurs if the infection breaches the bony walls (causing orbital cellulitis or abscess) or involves the cavernous sinus. In NEET-PG, diplopia is considered a **"red flag" sign** indicating a serious complication or an alternative diagnosis like a sino-nasal malignancy or fungal invasion (Mucormycosis), rather than a symptom of the sinusitis itself. **Analysis of Other Options:** * **Nasal Blockage:** A cardinal symptom of sinusitis caused by mucosal edema and accumulated purulent secretions obstructing the nasal airway. * **Facial Edema:** Common in acute sinusitis, especially over the maxillary or frontal areas, due to localized inflammation and venous stasis in the overlying soft tissues. * **Blood-stained Rhinorrhea:** While typically purulent (yellow/green), the inflamed and fragile nasal mucosa can frequently bleed, leading to blood-tinged discharge. **Clinical Pearls for NEET-PG:** * **Major Criteria for Sinusitis:** Facial pain/pressure, nasal obstruction, purulent post-nasal drip, and hyposmia/anosmia. * **Most Common Sinus Involved:** Maxillary sinus (in adults); Ethmoid sinus (in children). * **Red Flags:** Diplopia, proptosis, reduced visual acuity, and forehead swelling (Pott’s Puffy Tumor) indicate intracranial or intraorbital complications.

Question 18: What is the most common location for an osteoma?

A. Frontal sinus
B. Ethmoid sinus
C. Maxillary sinus
D. Aryepiglottic folds (Correct Answer)

Explanation: ### Explanation **Correct Answer: D. Aryepiglottic folds** **Understanding the Concept:** An **osteoma** is the most common benign tumor of the paranasal sinuses. However, when analyzing the frequency of occurrence across the entire upper aerodigestive tract and sinuses, the **frontal sinus** is traditionally cited as the most common site among the *paranasal sinuses*. *Note on the provided key:* In many standard ENT textbooks (like Dhingra), the **frontal sinus** is listed as the most common site (approx. 80%). However, if the question specifically targets the most common site for a "soft tissue" or "extranasal" presentation in specific clinical vignettes, or if there is a discrepancy in the provided key, it is vital to remember that **Frontal Sinus (Option A)** is the standard academic answer for paranasal osteomas. If "Aryepiglottic folds" is marked correct in your specific source, it likely refers to a specific rare variant or a localized high-yield question pattern, though it is anatomically atypical for a bone-forming tumor. **Analysis of Options:** * **A. Frontal Sinus:** Statistically the most common site for paranasal sinus osteomas. They are usually asymptomatic and discovered incidentally on imaging. * **B. Ethmoid Sinus:** The second most common site. Osteomas here can cause early symptoms due to the narrow space, leading to orbital displacement or proptosis. * **C. Maxillary Sinus:** A less common site compared to the frontal and ethmoid sinuses. * **D. Aryepiglottic folds:** This is an extremely rare site for an osteoma (which is a bone tumor). If this is the designated correct answer, it may be a "distractor-turned-key" in specific exam banks, but it defies standard anatomical frequency. **Clinical Pearls for NEET-PG:** 1. **Gardner’s Syndrome:** Always suspect this if a patient presents with multiple osteomas. It consists of **Colonic Polyposis, Osteomas, and Soft tissue tumors** (Sebaceous cysts/Dermoids). 2. **Management:** Asymptomatic osteomas are managed by observation ("Wait and Watch"). Surgery is indicated only if they cause obstruction, pain, or cosmetic deformity. 3. **Imaging:** On CT scan, they appear as highly radiopaque, ivory-like dense masses.

Question 19: What is the cause of sudden death in a patient who recently underwent maxillary sinus irrigation?

A. Air embolism (Correct Answer)
B. Maxillary artery thrombosis
C. Septicemia
D. Meningitis

Explanation: **Explanation:** **1. Why Air Embolism is the Correct Answer:** Air embolism is the most dreaded and lethal complication of maxillary sinus irrigation (Antral wash-out). It occurs when air is accidentally introduced into the venous system. During the procedure, if the **trocar** (specifically the Tilley’s antral trocar) injures the vascular mucosa or enters a bony canal, and air is insufflated to check the patency of the ostium, air can enter the **pterygoid venous plexus** or the facial veins. This air travels to the right heart and then to the pulmonary circulation (causing right heart failure) or through a patent foramen ovale to the brain, leading to immediate circulatory collapse and **sudden death**. **2. Why the Other Options are Incorrect:** * **B. Maxillary artery thrombosis:** While the maxillary artery is in proximity, its injury typically leads to severe epistaxis rather than sudden death. Thrombosis is a slow process and does not cause instantaneous mortality. * **C. Septicemia:** This is a systemic infection that takes hours or days to manifest. It would not cause "sudden" death immediately following a procedure. * **D. Meningitis:** This is a potential complication of chronic sinusitis or intracranial spread of infection, but it presents with fever and neck rigidity over a period of days, not sudden intra-procedural death. **3. NEET-PG High-Yield Pearls:** * **Prevention:** To avoid air embolism, **never insufflate air** into the sinus to check patency; always use saline first. * **Clinical Sign:** A "mill-wheel murmur" (splashing sound) may be heard on cardiac auscultation during an air embolism. * **Management:** If air embolism is suspected, place the patient in the **Durant’s position** (Left lateral decubitus and Trendelenburg) to trap air in the apex of the right ventricle. * **Common Site of Entry:** The trocar is usually passed through the **inferior meatus**, which is the thinnest part of the lateral wall of the nose.

Question 20: What is the term for an oblique and horizontal fracture of the nasal septum?

A. Jarjavay and chevallete fracture (Correct Answer)
B. Arnold fracture
C. Citteli fracture
D. Thudicum fracture

Explanation: **Explanation:** The correct answer is **Jarjavay and chevallete fracture**. Nasal septal fractures are classified based on the direction of the force applied and the resulting fracture lines: 1. **Jarjavay fracture:** This is a **horizontal** fracture line. It typically occurs due to a blow from the front, running through the vomer and the septal cartilage. 2. **Chevallet fracture:** This is a **vertical/oblique** fracture line. It usually results from a blow from below, involving the cartilaginous part of the septum. When combined, these terms describe the complex patterns of septal displacement often seen in nasal trauma. **Analysis of Incorrect Options:** * **Arnold fracture:** There is no recognized "Arnold fracture" in ENT. This is likely a distractor. (Note: Arnold-Chiari malformation is a neurological condition). * **Citteli fracture:** Citteli’s angle is a landmark in mastoid surgery (the sinodural angle), but it is not associated with a specific nasal fracture pattern. * **Thudicum fracture:** Thudicum is the name of a commonly used **nasal speculum** for anterior rhinoscopy, not a type of fracture. **High-Yield Clinical Pearls for NEET-PG:** * **Management:** Most septal fractures are managed by closed reduction under local or general anesthesia. * **Septal Hematoma:** Always rule this out in nasal trauma. If present, it requires **immediate incision and drainage** to prevent septal abscess and subsequent "saddle nose" deformity due to cartilage necrosis. * **Cottle’s Test:** Used to evaluate nasal valve patency; if pulling the cheek laterally improves the airway, the test is positive, indicating valve obstruction.

Practice by Chapter

Rhinitis

Practice Questions

Acute Rhinosinusitis

Practice Questions

Chronic Rhinosinusitis

Practice Questions

Nasal Polyposis

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Allergic Fungal Sinusitis

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Deviated Nasal Septum

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Epistaxis

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Nasal Trauma

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Choanal Atresia

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CSF Rhinorrhea

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Tumors of the Nose and Paranasal Sinuses

Practice Questions

Complications of Sinusitis

Practice Questions

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