Head and Neck Surgery Practice Questions

Q: A patient with a malignant lesion involving the posterior one -third of the tongue is being evaluated for regional lymph node metastasis. Which lymph nodes are most commonly involved in the lymphatic drainage of this region?

Deep cervical lymphnodes. ***Deep cervical lymph nodes*** - The posterior one-third of the tongue, specifically the **base of the tongue** (posterior to the circumvallate papillae), drains directly into the **deep cervical lymph nodes**, particularly the **jugulodigastric nodes**. - Because the drainage is bilateral and extensive, malignant lesions in this region often metastasize early to these deep nodes. *Submental lymph nodes* - These nodes primarily drain the **tip of the tongue**, the **floor of the mouth**, and the **lower incisors**. - They are not involved in the primary lymphatic drainage pathway of the posterior third of the tongue. *Submandibular lymph nodes* - These nodes receive lymphatic drainage from the **lateral parts of the anterior two-thirds of the tongue**, as well as the submandibular and sublingual glands. - They are considered a sentinel station for tumors of the floor of the mouth and the anterior oral cavity, not the posterior base. *Periauricular lymph nodes* - These nodes are located around the ear and primarily drain the **scalp**, **eyelids**, and the **external auditory canal**. - They are clinically irrelevant to the lymphatic drainage patterns of the tongue musculature and specialized mucosa.

Q: The given image is of right superficial parotidectomy to identify the marked structure?

External jugular vein. ### ***External jugular vein*** - In the context of a superficial parotidectomy, the **external jugular vein** is a critical landmark often identified crossing the **sternocleidomastoid muscle**. - Its position relative to the **parotid gland** and the **greater auricular nerve** helps surgeons orient themselves before dissecting deeper structures. *Facial nerve* - The **facial nerve** lies much deeper than the surface landmarks usually highlighted in initial superficial dissections; it is located within the **parotid parenchyma**. - It emerges from the **stylomastoid foramen** and divides within the substance of the parotid gland, requiring meticulous dissection to preserve. *Parotid gland* - While the procedure is a parotidectomy, the parotid gland is the target organ being resected, not the specific structure marked for identification. - In a superficial parotidectomy, the **superficial lobe** is removed, but the gland itself is the volume of tissue rather than a single distinct landmark structure. *Digastric muscle* - The **posterior belly of the digastric muscle** is a vital deep landmark for locating the **facial nerve** trunk, but it is situated deeper than the superficial plane. - It serves as a superior boundary for the **carotid triangle** and is key for surgical orientation, but is not the superficial vessel commonly identified at this stage.

Q: A lady got a stab wound on thyroid region, which zone and management?

Zone 2, surgical exploration. ***Zone 2, surgical exploration*** - **Zone 2** of the neck extends from the **cricoid cartilage** to the **angle of the mandible**, where the thyroid gland is located. - Penetrating trauma in Zone 2 is historically managed with **mandatory surgical exploration** due to the high density of critical structures, including the **carotid arteries**, **jugular veins**, and the **larynx/trachea**, which are easily damaged. *Zone 1 , surgical exploration* - **Zone 1** represents the area from the **clavicles** to the **cricoid cartilage**, containing the **great vessels** of the thoracic inlet. - While serious, modern management for Zone 1 often favors less invasive diagnostics like **CT angiography** or **endoscopy** rather than immediate mandatory neck exploration compared to the traditional approach. *Zone 1, conservative* - Management for neck injuries is rarely purely

Q: What is the narrowest part of the pediatric respiratory tract?

Subglottic area. **Explanation:** The pediatric airway is anatomically distinct from the adult airway. In children (especially those under 8–10 years old), the **subglottic area** (at the level of the cricoid cartilage) is the narrowest part of the respiratory tract. **1. Why the Subglottic Area is Correct:** In infants and young children, the larynx is **funnel-shaped**. While the glottis (vocal cords) is the narrowest part in adults (cylindrical larynx), the cricoid cartilage is the only complete cartilaginous ring in the pediatric airway. It does not expand, making the subglottic region the functional bottleneck. This is why even minor mucosal edema (as seen in Croup/Laryngotracheobronchitis) can cause significant airway obstruction in children. **2. Why Other Options are Incorrect:** * **Glottis:** This is the narrowest part of the **adult** airway. In children, the vocal cords are more anterior and superior, but the diameter at this level is wider than the subglottic region. * **Trachea:** While the trachea is narrow in infants, its diameter increases as it descends, and it is wider than the cricoid ring. * **Carina:** The bifurcation of the trachea is a landmark for tube placement but is not the narrowest point of the tract. **Clinical Pearls for NEET-PG:** * **Poiseuille’s Law:** Resistance to airflow is inversely proportional to the fourth power of the radius ($R \propto 1/r^4$). In the subglottis, 1mm of edema reduces the airway cross-section by 75% in an infant, compared to only 44% in an adult. * **Uncuffed ETT:** Historically, uncuffed endotracheal tubes were preferred in children to prevent pressure necrosis at the narrow cricoid level (though modern practice allows for low-pressure cuffed tubes). * **Omega-shaped Epiglottis:** A characteristic finding in the pediatric airway, often associated with Laryngomalacia.

Q: What is the best treatment for fibrous dysplasia involving the maxilla in a 25-year-old patient?

Cosmetic contouring. **Explanation:** **Fibrous dysplasia (FD)** is a benign, non-neoplastic fibro-osseous lesion where normal bone is replaced by cellular fibrous tissue and disorganized bony trabeculae. In the craniofacial region, the maxilla is the most commonly affected bone. **Why Cosmetic Contouring is the Correct Answer:** The primary goal of treatment in FD is functional and aesthetic, rather than complete eradication. Since FD is a self-limiting condition that typically stabilizes after skeletal maturity (which this 25-year-old patient has reached), aggressive surgery is rarely indicated. **Cosmetic contouring (shaving or debulking)** is the treatment of choice to restore facial symmetry and relieve pressure symptoms, as it is less morbid than radical resection. **Why Other Options are Incorrect:** * **A & C (En bloc/Maxillary Resection):** These are overly aggressive for a benign, slow-growing condition. Radical resection is reserved only for rare cases of rapid growth, severe functional impairment, or malignant transformation. * **D (Radiation Therapy):** This is **strictly contraindicated**. Radiation significantly increases the risk of malignant transformation into osteosarcoma or fibrosarcoma (up to 400 times the baseline risk). **NEET-PG High-Yield Pearls:** * **Radiological Hallmark:** "Ground-glass appearance" with ill-defined borders (blending into normal bone). * **McCune-Albright Syndrome:** Triad of Polyostotic FD, Café-au-lait spots (Coast of Maine), and precocious puberty. * **Jaffe-Lichtenstein Syndrome:** Polyostotic FD and Café-au-lait spots without endocrine involvement. * **Monostotic vs. Polyostotic:** Monostotic (70-80%) is more common; the maxilla is the most frequent site in the head and neck.

Q: A patient presents with a diffuse bilateral swelling below the chin. An infected lower molar is noted on the left side. In which area should an incision be made for drainage?

All of the above. ### Explanation The clinical presentation of diffuse bilateral submental/submandibular swelling associated with an infected lower molar is characteristic of **Ludwig’s Angina**. This is a rapidly spreading cellulitis of the submandibular, submental, and sublingual spaces. **Why "All of the above" is correct:** The primary goal of surgical management in Ludwig’s Angina is decompression and drainage to prevent airway compromise. The incision strategy follows these principles: * **Most Prominent Part:** To ensure direct access to the epicenter of the inflammatory collection. * **Most Dependent Part:** To facilitate gravity-assisted drainage, preventing the re-accumulation of pus or inflammatory fluid. * **Aesthetic Consideration:** Incisions (typically a transverse "collar" incision) are placed in natural skin creases (Langer’s lines) to minimize scarring and ensure the best cosmetic outcome post-recovery. **Analysis of Options:** * **Option A & B:** These are standard surgical principles for abscess drainage. In Ludwig’s Angina, where there is often "woody" edema rather than frank pus, a wide decompression at the most prominent and dependent site is vital. * **Option C:** While life-saving decompression is the priority, surgeons aim to place the incision in a submental skin fold to hide the scar, satisfying aesthetic requirements. **Clinical Pearls for NEET-PG:** * **Source of Infection:** Most commonly the **2nd or 3rd lower molar** (roots lie below the myohyoid line). * **Key Feature:** It is a **cellulitis**, not a true abscess; pus is often minimal. * **Primary Risk:** Airway obstruction due to posterior displacement of the tongue. * **Management Priority:** 1. Secure the airway (Fiberoptic intubation/Tracheostomy); 2. IV Antibiotics; 3. Incision and Drainage. * **Microbiology:** Usually polymicrobial (Streptococci, Staphylococci, and anaerobes).

Q: A female presented with swelling over the angle of the mouth. Investigation shows pleomorphic adenoma of the superficial lobe. What is the treatment of choice?

Superficial parotidectomy. **Explanation:** The patient presents with a **Pleomorphic Adenoma (Benign Mixed Tumor)**, which is the most common benign tumor of the parotid gland. It most frequently involves the **superficial lobe**. **1. Why Superficial Parotidectomy is the Correct Choice:** The standard of care for a pleomorphic adenoma involving the superficial lobe is **Superficial Parotidectomy** (also known as Supra-facial Parotidectomy). This procedure involves removing the entire superficial lobe while identifying and preserving the facial nerve. This ensures an adequate margin of healthy tissue around the tumor, which is crucial because pleomorphic adenomas often have "pseudopod" extensions through their capsule. **2. Why Other Options are Incorrect:** * **Enucleation:** This is strictly contraindicated. Simple "shelling out" of the tumor leads to a very high recurrence rate (up to 45%) because the pseudopods are left behind. It also risks seeding the surgical field. * **Radical Parotidectomy:** This involves the sacrifice of the facial nerve. It is reserved for high-grade malignancies with clinical evidence of nerve involvement, not for benign tumors like pleomorphic adenoma. * **Radiotherapy:** Pleomorphic adenomas are generally radioresistant. Surgery is the primary modality; radiotherapy is only considered in rare cases of multiple recurrences or inoperable tumors. **Clinical Pearls for NEET-PG:** * **Most common site:** Parotid gland (specifically the lower pole of the superficial lobe). * **Facial Nerve:** The facial nerve divides the parotid into superficial and deep lobes (Patey’s Plane). * **Frey’s Syndrome:** The most common late complication of superficial parotidectomy, diagnosed by the **Minor’s Starch-Iodine test**. * **Malignant Transformation:** If left untreated, it can transform into **Carcinoma ex-pleomorphic adenoma** (suggested by sudden rapid growth in a long-standing swelling).

Q: Structures preserved in modified radical neck dissection are all except:

Submandibular gland. ### Explanation The core concept behind neck dissections lies in the transition from the **Radical Neck Dissection (RND)** to the **Modified Radical Neck Dissection (MRND)**. In a **Radical Neck Dissection (Crile’s procedure)**, all lymph nodes from levels I to V are removed along with three non-lymphatic structures: the Spinal Accessory Nerve (SAN), the Sternocleidomastoid (SCM) muscle, and the Internal Jugular Vein (IJV). **Modified Radical Neck Dissection (MRND)** was developed to reduce morbidity by preserving one or more of these non-lymphatic structures. * **Why Option C is correct:** The **Submandibular gland** is part of the Level Ib nodal compartment. In both RND and MRND, the submandibular gland is **routinely removed** to ensure complete clearance of the Level I lymph nodes. It is not considered a "preserved structure" in the definition of MRND. * **Why Options A, B, and D are incorrect:** These are the three specific structures that define the "Modified" types: * **MRND Type I:** Preserves the Spinal Accessory Nerve. * **MRND Type II:** Preserves the Spinal Accessory Nerve and the Internal Jugular Vein. * **MRND Type III (Functional Neck Dissection):** Preserves all three—SAN, IJV, and SCM. ### High-Yield Clinical Pearls for NEET-PG: 1. **Selective Neck Dissection (SND):** Unlike MRND (which removes levels I-V), SND preserves one or more lymph node levels (e.g., Supraomohyoid dissection removes only levels I-III). 2. **Most commonly preserved structure:** The Spinal Accessory Nerve (to prevent "Shoulder Syndrome" or shoulder drop). 3. **Boundary of Level II and III:** The bifurcation of the carotid artery or the hyoid bone. 4. **Level VI:** Refers to the anterior compartment (pre-tracheal, para-tracheal nodes), often cleared in thyroid malignancies.

Q: Which of the following is most stable in closed reduction?

Arch bar. In the management of maxillofacial fractures, **Closed Reduction and Internal Fixation (CRIF)** aims to restore the patient's pre-injury dental occlusion without surgical exposure of the fracture site. ### **Why Arch Bar is the Correct Answer** The **Erich Arch Bar** is the gold standard for closed reduction in mandibular and maxillary fractures. It consists of a semi-rigid metal strip with hooks that is contoured to the dental arch and secured to the teeth using circumdental wires. * **Stability:** It provides multi-point fixation across the entire dental arch, distributing occlusal forces evenly. * **Function:** Once applied to both upper and lower arches, they are connected via elastic bands or wires (**Intermaxillary Fixation - IMF**), which provides superior stability for bone healing compared to other closed methods. ### **Why Other Options are Incorrect** * **Screws (A):** In the context of closed reduction, "IMF screws" can be used, but they provide only point-fixation. They are prone to loosening in soft bone and do not offer the same tension-band stability across the fracture line as arch bars. * **Direct Wiring (C):** Also known as "Eyelet wiring" or "Ivy loops." While useful for temporary stabilization, they involve fewer teeth and are less stable than arch bars, often slipping or causing more periodontal stress. ### **High-Yield Clinical Pearls for NEET-PG** * **Indications for Arch Bars:** Minimally displaced fractures, favorable mandibular fractures, and as a supplement to Open Reduction Internal Fixation (ORIF). * **Contraindications:** Patients with severe epilepsy (risk of aspiration during seizures) or poor periodontal health. * **Key Advantage:** It acts as a **tension band** on the alveolar segment of the mandible. * **Removal:** Usually removed after 4–6 weeks once clinical union is achieved.

Question 1

A patient with a malignant lesion involving the posterior one -third of the tongue is being evaluated for regional lymph node metastasis. Which lymph nodes are most commonly involved in the lymphatic drainage of this region?

Accepted Answer

Deep cervical lymphnodes

Answer

Submental lymphnodes

Answer

Submandibular lymphnodes

Answer

Periauricular lymphnodes

Question 2

The given image is of right superficial parotidectomy to identify the marked structure?

Accepted Answer

External jugular vein

Answer

Facial nerve

Answer

Parotid gland

Answer

Digastric muscle

Question 3

A lady got a stab wound on thyroid region, which zone and management?

Accepted Answer

Zone 2, surgical exploration

Answer

Zone 1 , surgical exploration

Answer

Zone 1, conservative

Answer

Zone 2, conservative

Question 4

What is the narrowest part of the pediatric respiratory tract?

Accepted Answer

Subglottic area

Answer

Glottis

Answer

Trachea

Answer

Carina

Question 5

What is the best treatment for fibrous dysplasia involving the maxilla in a 25-year-old patient?

Accepted Answer

Cosmetic contouring

Answer

En bloc resection

Answer

Maxillary resection

Answer

Radiation therapy

Question 6

A patient presents with a diffuse bilateral swelling below the chin. An infected lower molar is noted on the left side. In which area should an incision be made for drainage?

Accepted Answer

All of the above

Answer

The most prominent part of the swelling

Answer

The most dependent part of the swelling

Answer

An area where aesthetics will not be compromised

Question 7

A 80-year-old patient presents with a midline tumor of the lower jaw, involving the alveolar margin. The patient is edentulous. What is the treatment of choice?

Accepted Answer

Segmental mandibulectomy

Answer

Hemimandibulectomy

Answer

Commando operation

Answer

Marginal mandibulectomy

Question 8

A female presented with swelling over the angle of the mouth. Investigation shows pleomorphic adenoma of the superficial lobe. What is the treatment of choice?

Accepted Answer

Superficial parotidectomy

Answer

Radical parotidectomy

Answer

Enucleation

Answer

Radiotherapy

Question 9

Structures preserved in modified radical neck dissection are all except:

Accepted Answer

Submandibular gland

Answer

Accessory nerve

Answer

Sternocleidomastoid muscle

Answer

Internal jugular vein

Question 10

Which of the following is most stable in closed reduction?

Accepted Answer

Arch bar

Answer

Screws

Answer

Direct wiring

Answer

None of the above

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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