Head and Neck Surgery Practice Questions

Q: Which of the following is NOT a complication of oropharyngeal resection?

Xerostomia. **Explanation:** The correct answer is **A. Xerostomia**. **1. Why Xerostomia is the correct answer:** Xerostomia (dry mouth) is primarily a complication of **Radiotherapy (RT)**, not the surgical resection itself. During radiation for oropharyngeal tumors, the parotid and submandibular salivary glands are often within the radiation field, leading to acinar atrophy and fibrosis. While surgical resection involves removing tissue, it does not typically result in the global loss of salivary function unless all major salivary glands are bilaterally excised, which is not standard for oropharyngeal resection. **2. Analysis of Incorrect Options (Surgical Complications):** * **Thoracic duct injury:** This is a known risk during neck dissection (especially on the left side) which often accompanies oropharyngeal resection. It can lead to a chyle leak. * **Soft-tissue edema:** Extensive surgical manipulation, lymphatic disruption, and venous congestion post-resection commonly lead to significant airway and facial edema, often necessitating a temporary tracheostomy. * **Rupture of carotid artery:** This is a dreaded "catastrophic" complication. It usually occurs due to wound infection, salivary fistula (saliva bathing the artery), or necrosis of the skin flaps covering the vessel. **3. NEET-PG High-Yield Pearls:** * **Most common site** of oropharyngeal cancer: Palatine tonsils (followed by the base of the tongue). * **Carotid Blowout:** The risk increases significantly if the patient has had prior radiation or develops a pharyngocutaneous fistula. * **Pilocarpine:** Often used to treat radiation-induced xerostomia as it acts as a sialagogue. * **TNM Staging:** Oropharyngeal cancers are now staged differently based on **p16 (HPV) status**, as HPV-positive tumors have a significantly better prognosis.

Q: Tracheostomy opening is made between which tracheal rings?

Between the 3rd and 4th rings. In a standard elective tracheostomy, the goal is to create an airway below the level of the larynx while avoiding damage to vital structures. **1. Why Option B is Correct:** The ideal site for a tracheostomy is between the **2nd and 3rd** or **3rd and 4th tracheal rings**. This is considered the "safe zone" because it lies below the thyroid isthmus (which usually covers the 2nd to 4th rings and is retracted or divided) and is sufficiently distant from the cricoid cartilage. Placing the opening here ensures the tracheostomy tube does not cause subglottic stenosis. **2. Why the Other Options are Incorrect:** * **Options C & D (5th, 6th, or 7th rings):** Placing the opening too low increases the risk of damaging the **brachiocephalic (innominate) artery**, which crosses the trachea anteriorly at a lower level. It also increases the risk of the tube slipping into the right main bronchus or causing a tracheoinnominate fistula. * **High Tracheostomy (1st ring):** Though not listed as an option, an opening at the 1st ring is avoided as it leads to **perichondritis of the cricoid cartilage**, resulting in permanent subglottic stenosis. **Clinical Pearls for NEET-PG:** * **Emergency Airway:** In an acute "cannot intubate, cannot ventilate" scenario, a **Cricothyroidotomy** (through the cricothyroid membrane) is preferred over a tracheostomy due to its superficial location and speed. * **Thyroid Isthmus:** During surgery, the isthmus is either retracted superiorly or divided to expose the 3rd and 4th rings. * **Bjork Flap:** An inferiorly based flap of the 3rd tracheal ring often sutured to the skin to create a secure stoma.

Q: What is the most common complication of tracheostomy?

Surgical emphysema. **Explanation:** **Surgical emphysema** is the most common complication of tracheostomy. It occurs when air escapes from the trachea into the subcutaneous tissues of the neck. This typically happens due to: 1. **Tight wound closure:** If the skin incision is sutured too tightly around the tracheostomy tube, air cannot escape externally and is forced into the tissue planes. 2. **Excessive dissection:** Extensive dissection of the pretracheal fascia allows air to track easily into the subcutaneous space. 3. **Coughing:** Increased intratracheal pressure during coughing episodes post-procedure pushes air into the surrounding soft tissues. **Analysis of Incorrect Options:** * **Pneumothorax (A):** While a serious complication, it is less common. It occurs more frequently in children (due to higher pleural domes) or if the pleura is accidentally injured during a low tracheostomy. * **Injury to Large Vessels (C):** This is a rare but life-threatening intraoperative complication. The most commonly involved vessel is the **inferior thyroid vein**. Late-stage hemorrhage is usually due to a tracheoinnominate artery fistula. * **Injury to Oesophagus (D):** This is rare and usually occurs due to poor surgical technique or "through-and-through" injury to the posterior tracheal wall, especially in emergency settings or in children with soft tracheas. **High-Yield Clinical Pearls for NEET-PG:** * **Most common immediate complication:** Hemorrhage (usually from anterior jugular veins or thyroid isthmus). * **Most common overall/early complication:** Surgical emphysema. * **Most common late complication:** Tracheal stenosis. * **Most common cause of death post-tracheostomy:** Dislodgement of the tube or tube blockage. * **Apnoeic Pause:** Occurs immediately after opening the trachea in patients with chronic CO2 retention (loss of hypoxic drive).

Q: What is the most common nerve in the neck from which schwannoma arises?

Vagus nerve. **Explanation:** **Schwannomas** (neurilemmomas) are benign, slow-growing tumors arising from the Schwann cells of the nerve sheath. In the head and neck region, they most commonly involve the sensory or motor nerves. **Why the Vagus Nerve is Correct:** The **Vagus nerve (CN X)** is the most common site of origin for extracranial schwannomas in the neck. These tumors typically arise within the carotid space. Clinically, they present as a painless, slow-growing, mobile neck mass. A classic diagnostic sign is that the mass can be moved **laterally** but not vertically (because the nerve is fixed superiorly and inferiorly). On imaging, a Vagus schwannoma typically displaces the internal carotid artery medially and the internal jugular vein laterally. **Analysis of Incorrect Options:** * **Trigeminal (A):** While trigeminal schwannomas occur, they are usually intracranial (involving the Gasserian ganglion) rather than presenting as primary neck masses. * **Accessory (B) & Hypoglossal (C):** Both nerves can develop schwannomas, but they are significantly rarer than those arising from the Vagus nerve or the cervical sympathetic chain. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** Vagus nerve (CN X) is #1; Cervical Sympathetic Chain is #2. * **Imaging (MRI):** Schwannomas show intense enhancement and may exhibit the "target sign" (central low signal, peripheral high signal on T2). * **Histology:** Look for **Antoni A** (hypercellular, Verocay bodies) and **Antoni B** (hypocellular, myxoid) patterns. They are **S-100 positive**. * **Surgical Note:** Unlike neurofibromas, schwannomas are encapsulated and can often be dissected off the nerve fibers, preserving nerve function.

Q: The most common site of the internal opening of a bronchial fistula is at which location?

Tonsillar fossa. **Explanation:** The question refers to the **Second Branchial Arch Fistula**, which is the most common type of branchial fistula (95% of cases). **1. Why the Tonsillar Fossa is correct:** Branchial fistulae are the result of the failure of the second branchial cleft and the cervical sinus of His to obliterate. The tract of a second branchial fistula follows a specific embryological path: it starts at an external opening along the lower third of the sternocleidomastoid muscle, ascends along the carotid sheath, passes **between the internal and external carotid arteries**, and pierces the superior constrictor muscle to open internally. The internal opening is consistently located in the **tonsillar fossa** (specifically on the posterior pillar or the intratonsillar cleft). **2. Analysis of Incorrect Options:** * **Lateral nasopharyngeal wall / Fossa of Rosenmuller:** These are related to the **first branchial pouch** (Eustachian tube development). A first branchial cleft fistula typically opens into the external auditory canal. * **Gingivo-labial sulcus:** This is the site for a **Congenital Orofacial Fistula** or may be associated with dental pathology, but it is not a site for branchial arch derivatives. **3. High-Yield Clinical Pearls for NEET-PG:** * **First Branchial Fistula:** Opens into the External Auditory Canal (EAC). * **Second Branchial Fistula:** Most common; opens in the **Tonsillar Fossa**; passes between the carotids. * **Third Branchial Fistula:** Opens into the **Pyriform Sinus** (above the superior laryngeal nerve). * **Fourth Branchial Fistula:** Opens into the **Apex of the Pyriform Sinus** (below the superior laryngeal nerve); often associated with recurrent left-sided thyroid abscesses. * **Investigation of Choice:** Fistulogram (to delineate the tract).

Q: Removal of only Level VI lymph nodes is called as:

Central neck dissection. ### Explanation **Correct Answer: B. Central neck dissection** **Concept:** The neck is divided into various levels (I to VII) for surgical and oncological classification. **Level VI** is known as the **Central Compartment**. It is bounded superiorly by the hyoid bone, inferiorly by the suprasternal notch, and laterally by the common carotid arteries. Removal of lymph nodes in this specific region (pre-laryngeal, pre-tracheal, and para-tracheal nodes) is termed a **Central Neck Dissection**. This procedure is most commonly performed for thyroid malignancies (especially papillary thyroid carcinoma). **Why other options are incorrect:** * **Type 3 Modified Radical Neck Dissection (MRND):** This involves the removal of lymph node levels I through V while preserving all three non-lymphatic structures (Internal Jugular Vein, Sternocleidomastoid muscle, and Spinal Accessory nerve). It is much more extensive than a Level VI dissection. * **Functional Neck Dissection:** This is a clinical term often used synonymously with MRND. It implies a systematic removal of lymph node levels I-V while preserving non-lymphatic structures to maintain function. * **Supraomohyoid Neck Dissection (SOHND):** This is a type of **Selective Neck Dissection** that involves the removal of levels **I, II, and III** only. It is typically performed for oral cavity cancers. **High-Yield Clinical Pearls for NEET-PG:** * **Level VI Boundaries:** Hyoid (Superior), Suprasternal notch (Inferior), Carotids (Lateral). * **Delphian Node:** A specific node in Level VI (pre-laryngeal) that, if involved, often indicates subglottic or thyroid cancer spread. * **Level VII:** Refers to the superior mediastinal lymph nodes (below the suprasternal notch). * **Radical Neck Dissection (RND):** Removal of levels I-V + IJV + SCM + Spinal Accessory Nerve.

Q: A 12-year-old patient presents with midline neck swelling, which moves upwards during protrusion of tongue. What is the most common site for this condition?

Subhyoid. ***Subhyoid*** - This presentation describes a **thyroglossal duct cyst**, characterized by a **midline neck swelling** that moves with **tongue protrusion**. - The most common location for these cysts, representing approximately 65% of cases, is **subhyoid** or just below the hyoid bone. *Suprahyoid* - While thyroglossal duct cysts can occur suprahyoid (above the hyoid bone), this is less common than the subhyoid location. - Suprahyoid cysts account for about 20% of cases. *Beneath the foramen cecum* - The **foramen cecum** is the origin of the thyroglossal duct at the base of the tongue, and cysts forming here are very rare. - Cysts in this location would typically manifest as a mass at the base of the tongue, rather than a prominent neck swelling. *Floor of mouth* - Cysts in the **floor of the mouth** are usually **ranulas** or **dermoid cysts**, and do not typically move with tongue protrusion in the same manner as a thyroglossal duct cyst. - While some rare thyroglossal duct cysts can have an intraoral component, their primary presentation is not usually exclusively in the floor of the mouth.

Q: Which of the following is characteristic of emergency tracheostomy?

Vertical incision. ***Vertical incision*** - An emergency tracheostomy typically uses a **vertical skin incision** to expedite airway access, as precision and cosmetic outcomes are secondary to speed in a life-threatening situation. - This approach minimizes time spent dissecting through tissue layers, crucial when rapid airway establishment is needed. *Horizontal skin incision* - A **horizontal skin incision** is usually preferred for **elective tracheostomies** due to its cosmetic benefits, as it can be hidden within skin creases. - This incision allows for a more meticulous dissection of the soft tissues and strap muscles, which is not feasible in an emergency. *Is well planned and prepared* - **Emergency tracheostomy** is by definition an unplanned procedure, performed when other airway management techniques have failed or are not possible. - It is typically carried out under urgent circumstances with limited preparation, often at the bedside or in an emergency setting. *Cosmetically better* - A vertical incision, while quicker in an emergency, generally results in a **less cosmetically appealing scar** compared to a horizontal incision. - Cosmetic considerations are secondary to establishing an airway in an emergency, meaning **scar formation** is not prioritized.

Question 1

Which of the following is NOT a complication of oropharyngeal resection?

Accepted Answer

Xerostomia

Answer

Thoracic duct injury

Answer

Soft-tissue edema

Answer

Rupture of carotid artery

Question 2

Tracheostomy opening is made between which tracheal rings?

Accepted Answer

Between the 3rd and 4th rings

Answer

Between the 2nd and 3rd rings

Answer

Between the 6th and 7th rings

Answer

Between the 5th and 6th rings

Question 3

What is the most common complication of tracheostomy?

Accepted Answer

Surgical emphysema

Answer

Pneumothorax

Answer

Injury to the large vessels

Answer

Injury to oesophagus

Question 4

What is the most common nerve in the neck from which schwannoma arises?

Accepted Answer

Vagus nerve

Answer

Trigeminal

Answer

Accessory

Answer

Hypoglossal

Question 5

The most common site of the internal opening of a bronchial fistula is at which location?

Accepted Answer

Tonsillar fossa

Answer

Lateral nasopharyngeal wall

Answer

Fossa of Rosenmuller

Answer

Gingivo-labial sulcus

Question 6

Supraomohyoid neck dissection includes removal of which lymph node levels?

Accepted Answer

Level I - III Lymph nodes

Answer

Level I - IV Lymph nodes

Answer

Level II - V Lymph nodes

Answer

Level II - IV Lymph nodes

Question 7

In performing a tracheostomy, what is the generally accepted practice?

Accepted Answer

The trachea should be entered at the second or third cartilaginous ring.

Answer

The strap muscles should be divided.

Answer

The thyroid isthmus should be preserved.

Answer

Only horizontal incisions should be used.

Question 8

Removal of only Level VI lymph nodes is called as:

Accepted Answer

Central neck dissection

Answer

Type 3 Modified radical neck dissection

Answer

Functional neck dissection

Answer

Supraomohyoid neck dissection

Question 9

A 12-year-old patient presents with midline neck swelling, which moves upwards during protrusion of tongue. What is the most common site for this condition?

Accepted Answer

Subhyoid

Answer

Suprahyoid

Answer

Beneath the foramen cecum

Answer

Floor of mouth

Question 10

Which of the following is characteristic of emergency tracheostomy?

Accepted Answer

Vertical incision

Answer

Horizontal skin incision

Answer

Is well planned and prepared

Answer

Cosmetically better

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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