Diseases of the Nose and Paranasal Sinuses Practice Questions

Q: A 32-year-old female patient underwent extraction of an upper first molar on the right side, resulting in a 0.3 mm perforation of the sinus wall. Oroantral communication is predominantly seen during the extraction of which teeth?

Maxillary first molars. **Explanation:** The **maxillary first molar** is the most common tooth associated with the formation of an oroantral communication (OAC). This is primarily due to the anatomical proximity of its roots to the floor of the maxillary sinus (antrum of Highmore). In many adults, only a thin layer of bone—or sometimes just the sinus mucosa—separates the trifurcated roots of the first molar from the sinus cavity. During extraction, the divergent nature of these roots increases the risk of fracturing the thin antral floor. **Analysis of Options:** * **Maxillary First Molar (Correct):** Statistically the most frequent site for OAC because its roots are the longest and most closely related to the lowest point of the sinus floor. * **Maxillary Second Molar:** While also in close proximity to the sinus, it is the second most common site. The roots are often less divergent than the first molar. * **Maxillary Premolars:** The second premolar is frequently near the sinus, but the first premolar is usually further anterior, making OAC less common. * **Maxillary Paramolar:** These are supernumerary teeth. While they can cause complications, they are rare compared to the standard dentition. **Clinical Pearls for NEET-PG:** * **Definition:** An OAC is a physical communication between the oral cavity and maxillary sinus. If it persists and becomes epithelialized, it is termed an **Oroantral Fistula (OAF)**. * **Management Rule of Thumb:** * ** 6 mm:** Requires surgical closure (e.g., **Berger’s Buccal Advancement Flap** or Palatal Rotation Flap). * **Diagnosis:** Positive **nose-blowing test** (escape of air/bubbles through the socket).

Q: All of the following are true of antrochoanal polyp except?

Bleeds on touch. **Explanation:** Antrochoanal polyps (Killian's polyp) are benign, non-neoplastic growths that arise from the mucosa of the maxillary sinus, exit through the accessory ostium, and extend into the choana and nasopharynx. **Why "Bleeds on touch" is the correct answer (False statement):** Antrochoanal polyps are typically **translucent, pearly white, or grayish-pink** in appearance. They are relatively avascular and smooth. Unlike malignant tumors (like inverted papilloma or squamous cell carcinoma) or vascular tumors (like Juvenile Nasopharyngeal Angiofibroma), they **do not bleed on touch**. If a nasal mass bleeds easily, a clinician should suspect malignancy or a vascular lesion rather than a simple polyp. **Analysis of other options:** * **A. Common in young:** True. These polyps are most frequently seen in children and young adults, unlike ethmoidal polyps which are more common in older adults. * **B. Single and unilateral:** True. Antrochoanal polyps are characteristically solitary and affect only one side. Bilateral presentation is extremely rare. * **D. Treatment involves FESS:** True. Functional Endoscopic Sinus Surgery (FESS) is the gold standard. The goal is to remove the polyp and its stalk from the maxillary sinus to prevent recurrence. **High-Yield Clinical Pearls for NEET-PG:** * **Components:** It has three parts—Antral, Nasal, and Choanal. * **Radiology:** On X-ray/CT, it shows opacification of the maxillary sinus with a soft tissue mass extending into the nasopharynx. * **Differential Diagnosis:** Must be differentiated from **Angiofibroma** (which occurs in adolescent males and bleeds profusely). * **Historical Note:** The Caldwell-Luc operation was previously used but has been largely replaced by FESS.

Q: A patient, post-laparoscopic appendicectomy, experienced a fall from bed resulting in nasal swelling and difficulty breathing. What is the next step in management?

Surgical drainage. **Explanation:** The clinical presentation of nasal swelling and airway obstruction following trauma (the fall) is highly suggestive of a **Nasal Septal Hematoma**. This occurs when blood collects between the septal cartilage and its overlying mucoperichondrium. **Why Surgical Drainage is the Correct Answer:** A septal hematoma is a surgical emergency. The septal cartilage relies on the perichondrium for its blood supply through diffusion. The collection of blood separates these layers, leading to **ischemic necrosis** of the cartilage. If not drained immediately via incision and drainage (I&D), it can lead to a septal abscess, septal perforation, or a permanent cosmetic deformity known as **Saddle Nose Deformity**. **Analysis of Incorrect Options:** * **Option A (Antibiotics):** While antibiotics are given post-drainage to prevent secondary infection (abscess), they cannot evacuate the hematoma or restore blood supply to the cartilage. * **Option B (Observation):** Observation is contraindicated as the pressure from the hematoma will continue to compromise the cartilage's viability. * **Option D (Discharge/Delayed Follow-up):** Delaying treatment for 8 weeks would guarantee permanent structural damage and potential intracranial complications if an abscess forms. **NEET-PG High-Yield Pearls:** * **Clinical Sign:** On examination, look for a bilateral, soft, fluctuant, reddish/purplish bulge on the septum that does not shrink with topical vasoconstrictors. * **Management:** Wide horizontal incision (to prevent premature closure) followed by nasal packing to prevent re-accumulation. * **Most Common Complication:** If untreated, the most common late complication is **Saddle Nose Deformity** due to cartilage destruction. * **Pediatric Note:** In children, even minor trauma can cause a hematoma; always check the septum in pediatric nasal injuries.

Q: X-ray showing an air column between a soft tissue mass and the posterior wall of the nasopharynx is suggestive of which condition?

Antrochoanal polyp. **Explanation:** The correct answer is **Antrochoanal polyp (B)**. An Antrochoanal polyp (ACP) originates from the maxillary sinus mucosa, exits through the accessory ostium, and extends posteriorly through the choana into the nasopharynx. On a lateral view X-ray of the soft tissue neck/nasopharynx, the polyp appears as a well-defined, smooth, globular soft tissue mass. The characteristic radiological sign is a **distinct air column** visible between the posterior border of the polyp and the posterior pharyngeal wall. This occurs because the polyp hangs freely in the nasopharyngeal space and does not invade or arise from the pharyngeal wall itself. **Analysis of Incorrect Options:** * **Ethmoidal polyp (A):** These are usually multiple, bilateral, and grape-like clusters that rarely grow large enough to present as a single massive nasopharyngeal lesion with a clear posterior air column. * **Nasal myiasis (C):** This is a parasitic infestation by maggots (usually *Chrysomya bezziana*). It presents with foul-smelling discharge, crusting, and tissue destruction, rather than a discrete soft tissue mass on X-ray. **High-Yield Clinical Pearls for NEET-PG:** * **Origin:** ACP most commonly arises from the **maxillary sinus** (specifically the lateral wall or floor). * **Clinical Presentation:** Typically seen in children and young adults; presents with **unilateral** nasal obstruction. * **Radiology:** On CT scan, it shows the "dumbbell" shape or opacification of the maxillary sinus with extension into the choana. * **Treatment of Choice:** Functional Endoscopic Sinus Surgery (FESS) to remove the polyp and its antral attachment to prevent recurrence. (Historical treatment: Caldwell-Luc surgery).

Q: Pain in the vertex is typically seen in which condition?

Sphenoid sinusitis. **Explanation:** The correct answer is **Sphenoid Sinusitis**. **1. Why Sphenoid Sinusitis is correct:** The sphenoid sinus is located deep within the skull, close to the center of the cranial base. Pain originating from the sphenoid sinus is typically referred to the **vertex** (the top of the head), the occiput, or behind the eyes (retro-orbital). This referred pain pattern occurs because the sinus is innervated by the ophthalmic division of the trigeminal nerve (CN V1) and the sphenopalatine ganglion. Sphenoid sinusitis is often called the "forgotten sinus" because its symptoms are vague and do not present with typical facial pressure. **2. Why the other options are incorrect:** * **Ethmoid Sinusitis:** Pain is typically localized to the **bridge of the nose**, the medial canthus of the eye, or the retro-orbital area. * **Frontal Sinusitis:** Characterized by pain in the **forehead** (supraorbital region). It often follows a "periodic" or "office headache" pattern, where pain starts in the morning and subsides by late afternoon as the sinus drains. * **Maxillary Sinusitis:** Pain is felt over the **cheek** (infraorbital region) and may be referred to the upper teeth (dental pain), as the superior alveolar nerves supply both the sinus and the teeth. **3. Clinical Pearls for NEET-PG:** * **Office Headache:** Classic sign of Frontal Sinusitis. * **Mnemonic for Pain Sites:** * Frontal → Forehead * Maxillary → Cheek/Teeth * Ethmoid → Bridge of nose * Sphenoid → Vertex/Occiput * **Complications:** Sphenoid sinusitis is high-risk due to its proximity to the optic nerve, cavernous sinus, and internal carotid artery. Always rule it out in cases of isolated vertex headache.

Q: A 12-year-old child presents with bilateral nasal pink masses. What is the most important investigation prior to undertaking surgery?

Contrast CT Scan. **Explanation:** The clinical presentation of a child with bilateral nasal masses (likely **Antrochoanal polyps** or **Encephaloceles**) necessitates a cautious approach. The most important investigation prior to surgery is a **Contrast-Enhanced CT (CECT) Scan**. **Why Contrast CT is the Correct Choice:** 1. **Rule out Intracranial Extension:** In children, a midline or nasal mass may be a **Meningoencephalocele** (herniation of brain matter/meninges through a skull base defect). A CT scan is vital to assess the integrity of the cribriform plate and skull base. 2. **Vascularity:** If the mass is an **Angiofibroma** (though usually unilateral and in older adolescent males), contrast helps assess the vascularity and extent of the lesion. 3. **Surgical Mapping:** It defines the bony anatomy of the paranasal sinuses, identifying the origin of the polyp and any associated bone erosion or expansion. **Why Other Options are Incorrect:** * **Biopsy/FNAC:** These are **contraindicated** as initial steps. If the mass is an Encephalocele, a biopsy can lead to a **CSF leak and Meningitis**. If the mass is an Angiofibroma, it can cause **torrential, life-threatening hemorrhage**. * **Ultrasound:** It has limited utility in the nasal cavity due to the surrounding bony structures, which prevent adequate visualization of deep-seated masses or skull base defects. **Clinical Pearls for NEET-PG:** * **Golden Rule:** Never biopsy a nasal mass in a child/adolescent without imaging to rule out Encephalocele or Angiofibroma. * **Investigation of Choice (IOC):** For Sinonasal Polyposis, the IOC is **CT Scan of Paranasal Sinuses (PNS)**. * **Meningoencephalocele:** Classically presents with a positive **Furstenberg’s Test** (pulsation/expansion of the mass upon compression of the internal jugular vein).

Q: Which X-ray view is primarily used for assessing a nasal fracture?

Lateral view. **Explanation:** **1. Why the Lateral View is Correct:** The **Lateral view of the nasal bones** is the most sensitive and specific radiographic projection for diagnosing nasal fractures. Since the nasal bones are thin, midline structures, a lateral projection allows for the visualization of cortical disruptions, depressions, or displacements of the nasal bridge without the overlap of denser facial bones (like the maxilla or zygoma). It is particularly useful for identifying transverse fractures and assessing the degree of posterior displacement. **2. Why the Other Options are Incorrect:** * **Waters View (Occipitomental):** This is the gold standard for visualizing the **maxillary sinuses**. While it can show the orbital rim and zygomatic arch, the nasal bones are foreshortened and poorly visualized. * **Caldwell’s View (Occipitofrontal):** This is primarily used for the **frontal and ethmoid sinuses**. The nasal bones are obscured by the shadow of the frontal bone and the base of the skull. * **Occlusal Anterior View:** This is a dental radiograph used to visualize the floor of the mouth or the palate. It is not used for assessing the nasal dorsum. **3. Clinical Pearls for NEET-PG:** * **Clinical Diagnosis:** Remember that a nasal fracture is primarily a **clinical diagnosis** (based on epistaxis, deformity, and crepitus). X-rays are often unnecessary for management but are frequently done for medico-legal purposes. * **Best Imaging:** If a complex midfacial fracture is suspected (e.g., Le Fort fractures), a **Non-Contrast CT (NCCT) of the Paranasal Sinuses** is the investigation of choice. * **Waters View Tip:** It is the best view for the **Maxillary sinus** and to see the **orbital floor** (Blow-out fractures).

Question 1

A 32-year-old female patient underwent extraction of an upper first molar on the right side, resulting in a 0.3 mm perforation of the sinus wall. Oroantral communication is predominantly seen during the extraction of which teeth?

Accepted Answer

Maxillary first molars

Answer

Maxillary premolars

Answer

Maxillary second molar

Answer

Maxillary paramolar

Question 2

Regarding nasal syphilis, which of the following statements is true, except?

Accepted Answer

Secondary syphilis is the common association.

Answer

Perforation can occur in the nasal septum.

Answer

Saddle nose deformity may develop.

Answer

In newborns, the condition presents as snuffles.

Question 3

All of the following are true of antrochoanal polyp except?

Accepted Answer

Bleeds on touch

Answer

Common in young

Answer

Single and unilateral

Answer

Treatment involves FESS

Question 4

A patient, post-laparoscopic appendicectomy, experienced a fall from bed resulting in nasal swelling and difficulty breathing. What is the next step in management?

Accepted Answer

Surgical drainage

Answer

Administer antibiotics for 7-10 days

Answer

Observation in hospital

Answer

Discharge after 2 days with follow-up in 8 weeks

Question 5

Which developmental cyst does not involve bone and may not be visible on radiographs, but causes swelling in the mucobuccal fold and the floor of the nose near the attachment of the ala over the maxilla?

Accepted Answer

Nasoalveolar cyst

Answer

Nasopalatine cyst

Answer

Gingival cyst of neonate

Answer

Primordial cyst

Question 6

X-ray showing an air column between a soft tissue mass and the posterior wall of the nasopharynx is suggestive of which condition?

Accepted Answer

Antrochoanal polyp

Answer

Ethmoidal polyp

Answer

Nasal myiasis

Answer

None of the above

Question 7

Pneumatocele is seen in fracture of which sinus?

Accepted Answer

Frontal sinus

Answer

Maxillary sinus

Answer

Ethmoid sinus

Answer

Sphenoid sinus

Question 8

Pain in the vertex is typically seen in which condition?

Accepted Answer

Sphenoid sinusitis

Answer

Ethmoid sinusitis

Answer

Frontal sinusitis

Answer

Maxillary sinusitis

Question 9

A 12-year-old child presents with bilateral nasal pink masses. What is the most important investigation prior to undertaking surgery?

Accepted Answer

Contrast CT Scan

Answer

Ultrasound

Answer

FNAC (Fine Needle Aspiration Cytology)

Answer

Biopsy

Question 10

Which X-ray view is primarily used for assessing a nasal fracture?

Accepted Answer

Lateral view

Answer

Waters view

Answer

Caldwell's view

Answer

Occlusal anterior view

Diseases of the Nose and Paranasal Sinuses — MCQs

Diseases of the Nose and Paranasal Sinuses — MCQs

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