Head and Neck Surgery — MCQs

Head and Neck Surgery Indian Medical PG Practice Questions and MCQs

Question 211: After removal of the parotid gland, a patient experiences sweating on the cheeks while eating. In this complication, the auriculotemporal nerve, which contains parasympathetic secretomotor fibers to the parotid gland, is fused with which nerve?

A. Greater petrosal nerve
B. Facial nerve
C. Great auricular nerve (Correct Answer)
D. Buccal nerve

Explanation: ### Explanation The clinical scenario describes **Frey’s Syndrome** (Auriculotemporal Syndrome), a common complication following parotidectomy. **1. Why the Correct Answer is Right:** During parotid surgery, the **auriculotemporal nerve** (which carries parasympathetic secretomotor fibers to the parotid gland) is severed. During the healing process, these regenerating parasympathetic fibers misdirect and fuse with the distal ends of the severed **great auricular nerve** (specifically its terminal branches). The great auricular nerve normally provides sympathetic sudomotor (sweat) and vasomotor (vessel) innervation to the skin of the cheek. Consequently, a stimulus intended for salivation (eating) results in localized sweating and flushing of the cheek (gustatory sweating). **2. Analysis of Incorrect Options:** * **A. Greater petrosal nerve:** This is a branch of the facial nerve (CN VII) that carries parasympathetic fibers to the lacrimal gland, not the parotid. * **B. Facial nerve:** While the facial nerve is at high risk during parotidectomy, its injury leads to motor paralysis of facial muscles, not gustatory sweating. * **D. Buccal nerve:** This is a branch of the mandibular nerve (V3) providing sensory innervation to the cheek mucosa; it is not involved in the autonomic miswiring of Frey’s syndrome. **3. NEET-PG High-Yield Pearls:** * **Diagnosis:** Confirmed by the **Minor’s Starch-Iodine Test** (iodine is applied to the cheek, followed by starch; sweat turns the area blue-black). * **Treatment:** Topical anticholinergics (glycopyrrolate) or **Botulinum toxin** injections (most effective). * **Prevention:** Interposition of a barrier (e.g., SMAS flap or acellular dermal matrix) during surgery. * **Nerve Pathway:** Preganglionic parasympathetic fibers travel via the **Lesser Petrosal Nerve** to the **Otic Ganglion**, then postganglionic fibers join the **Auriculotemporal Nerve**.

Question 212: What is the most common location for a branchial cyst?

A. Upper one-third of the sternocleidomastoid muscle (Correct Answer)
B. Lower one-third of the sternocleidomastoid muscle
C. Upper two-thirds of the sternocleidomastoid muscle
D. Lower two-thirds of the sternocleidomastoid muscle

Explanation: **Explanation:** Branchial cysts are congenital epithelial cysts that arise from the failure of the **second branchial cleft** to involute during embryonic development. This is the most common branchial apparatus anomaly (accounting for approximately 95% of cases). **Why Option A is Correct:** The second branchial cleft normally disappears as the second arch grows downward to meet the fifth arch, forming the cervical sinus of His. If this sinus fails to obliterate, a cyst forms. Anatomically, these cysts are characteristically located at the **junction of the upper one-third and middle one-third** of the anterior border of the **sternocleidomastoid (SCM) muscle**. This corresponds to the level of the carotid bifurcation. **Why Other Options are Incorrect:** * **Options B, C, and D:** While branchial anomalies can technically occur anywhere along the line of the branchial apparatus, the specific anatomical "sweet spot" for a second branchial cyst is consistently the upper portion of the SCM. Cysts found in the lower third of the neck are much rarer and may represent third or fourth branchial pouch remnants, which typically present as fistulae or are associated with the thyroid gland. **NEET-PG High-Yield Pearls:** * **Pathognomonic Feature:** The cyst is lined by squamous epithelium and contains **"cholesterol crystals"** in its fluid (straw-colored). * **Relation to Vessels:** A second branchial cyst/fistula typically passes **between the internal and external carotid arteries**, superficial to the glossopharyngeal and hypoglossal nerves. * **Clinical Presentation:** Usually presents in late childhood or early adulthood (20s) as a painless, fluctuant swelling that may enlarge during upper respiratory tract infections. * **Treatment:** Complete surgical excision (Sistrunk procedure is for thyroglossal cysts; do not confuse the two). For branchial fistulae, a **stepladder incision** is often required.

Question 213: Cystic hygroma is known to occur in all of the following locations except?

A. Calf (Correct Answer)
B. Neck
C. Axilla
D. Mediastinum

Explanation: **Explanation:** **Cystic hygroma** (also known as macrocystic lymphatic malformation) is a congenital malformation of the lymphatic system. It occurs due to the failure of lymphangiomatous buds to establish a connection with the venous system, leading to the sequestration of lymphatic tissue and subsequent cystic dilatation. **Why Calf is the Correct Answer:** Cystic hygromas predominantly occur in areas where major lymphatic sacs are located during embryonic development. These sacs are found in the neck, axilla, mediastinum, and retroperitoneum. The **calf** is an extremely rare site for a primary cystic hygroma because it lacks these primitive lymphatic centers. While lymphangiomas can occur in the extremities, they are usually of the "cavernous" or "capillary" type rather than the classic "cystic hygroma" seen in the neck. **Analysis of Other Options:** * **Neck (70-80%):** The most common site (specifically the posterior triangle), as it arises from the jugular lymph sacs. * **Axilla (20%):** The second most common site, arising from the subclavian lymph sacs. * **Mediastinum (5%):** Occurs due to the extension of a cervical hygroma or primary development from mediastinal lymph channels. **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Feature:** It is a soft, painless, compressible, and **brilliantly transilluminant** mass. * **Association:** Frequently associated with chromosomal anomalies, most commonly **Turner Syndrome** (45, XO), Down Syndrome, and Noonan Syndrome. * **Complications:** Sudden increase in size usually indicates **hemorrhage** into the cyst or infection. * **Treatment of Choice:** Surgical excision is the gold standard. For unresectable cases, sclerotherapy (e.g., OK-432/Picibanil, Bleomycin) is used.

Question 214: What is the most common spinal tumor?

A. Neuroblastomas
B. Neurofibroma (Correct Answer)
C. Ependymoma
D. Meningioma

Explanation: **Explanation:** Spinal tumors are broadly classified based on their anatomical location relative to the dura and the spinal cord. The most common category is **intradural extramedullary (IDEM)** tumors, which account for approximately 70-80% of all primary spinal neoplasms. **Why Neurofibroma is correct:** Among IDEM tumors, **nerve sheath tumors** (Neurofibromas and Schwannomas) are the most frequent. In many clinical textbooks and surgical series, neurofibromas are cited as the most common primary spinal tumor overall. They typically arise from the dorsal nerve roots and can present with radicular pain or a "dumbbell" appearance as they exit the neural foramina. **Analysis of Incorrect Options:** * **Neuroblastomas:** These are embryonal tumors primarily seen in children, usually arising from the adrenal medulla or sympathetic chain. While they can invade the spinal canal (paraspinal), they are not the most common primary spinal tumor. * **Ependymoma:** This is the most common **intramedullary** (within the cord) tumor in adults. However, intramedullary tumors are much rarer than extramedullary ones. * **Meningioma:** These are the second most common IDEM tumors. They are most frequently found in the thoracic spine of middle-aged women. While common, they generally trail nerve sheath tumors in overall frequency. **High-Yield Clinical Pearls for NEET-PG:** * **Most common spinal tumor overall:** Metastatic tumors (usually extradural). * **Most common primary spinal tumor:** Neurofibroma/Schwannoma (IDEM). * **Most common intramedullary tumor (Adults):** Ependymoma. * **Most common intramedullary tumor (Children):** Astrocytoma. * **Dumbbell-shaped tumor:** Characteristic of Nerve Sheath Tumors (Neurofibroma).

Question 215: A blowout fracture of the orbit refers to which of the following?

A. A fracture involving the orbital floor or medial wall (Correct Answer)
B. A fracture of the maxillary sinus
C. A fracture of the temporal bone
D. An open fracture of a long bone from inside out

Explanation: ### Explanation **Blowout fractures** occur when a blunt object (larger than the orbital rim, such as a tennis ball or a fist) strikes the orbit. The impact increases intraorbital pressure, which is transmitted to the weakest parts of the orbital walls, causing them to "blow out" into the adjacent sinuses while the orbital rim remains intact. **1. Why Option A is Correct:** The **orbital floor** (specifically the maxillary bone over the infraorbital canal) is the most common site of a blowout fracture because it is the thinnest part of the orbit. The **medial wall** (lamina papyracea of the ethmoid bone) is the second most common site. These fractures allow orbital contents (fat and muscles) to herniate into the maxillary or ethmoid sinuses. **2. Why Other Options are Incorrect:** * **Option B:** While the fracture involves the roof of the maxillary sinus, it is primarily defined by the orbital wall involvement. A "maxillary sinus fracture" usually refers to a Le Fort or tripod fracture involving the anterior or lateral walls. * **Option C:** Temporal bone fractures are associated with head trauma and present with hearing loss, facial nerve palsy, or CSF otorrhea, not orbital symptoms. * **Option D:** This describes a "compound fracture" or a specific mechanism of long bone injury, unrelated to the orbit. **3. High-Yield Clinical Pearls for NEET-PG:** * **Clinical Features:** Enophthalmos (sunken eye), diplopia (double vision), and infraorbital nerve anesthesia (numbness of the cheek/upper lip). * **Muscle Entrapment:** The **Inferior Rectus muscle** is most commonly entrapped, leading to restricted upward gaze. * **Radiology:** The **"Teardrop Sign"** on a Water’s view X-ray or CT scan represents herniated orbital fat and muscle in the maxillary sinus. * **Management:** Surgical intervention is required if there is persistent diplopia or significant enophthalmos (>2mm).

Question 216: What is the primary indication for a 'commando operation' in surgical oncology?

A. Colon cancer
B. Carcinoma of the esophagus
C. Parotid gland tumor
D. Carcinoma of the oral cavity (Correct Answer)

Explanation: **Explanation:** The **Commando Operation** (Combined Mandibulectomy and Neck Dissection Operation) is a major surgical procedure primarily indicated for advanced **Carcinoma of the Oral Cavity** (Option D), particularly when the tumor involves the floor of the mouth, the tongue, or the lower alveolus and has invaded or is in close proximity to the mandible. The procedure involves a "composite resection" consisting of three main components: 1. **Resection of the primary intraoral tumor.** 2. **Partial or hemi-mandibulectomy** (removal of a portion of the lower jaw). 3. **Ipsilateral Radical Neck Dissection** (removal of cervical lymph nodes). **Why other options are incorrect:** * **Colon cancer (A):** Managed via colectomy or anterior resection; it does not involve head and neck structures. * **Carcinoma of the esophagus (B):** Managed via esophagectomy (e.g., Ivor-Lewis or McKeown procedure). * **Parotid gland tumor (C):** Managed via superficial or total parotidectomy, usually sparing the mandible unless there is direct massive invasion. **High-Yield Clinical Pearls for NEET-PG:** * **Etymology:** The name is derived from the "Commando" units of WWII, reflecting the aggressive and "tough" nature of the surgery. * **Reconstruction:** Modern commando operations often utilize a **Pectoralis Major Myocutaneous (PMMC) flap** or a free fibula flap for mandibular reconstruction. * **Key Landmark:** The **marginal mandibular nerve** (branch of the Facial nerve) is at high risk during this procedure; injury leads to drooping of the corner of the mouth. * **Indication:** It is typically reserved for **T4 lesions** of the oral cavity where bone invasion is present.

Question 217: Ameloblastoma is best managed by:

A. Chemotherapy
B. Radiotherapy
C. Gene therapy
D. Surgical excision (Correct Answer)

Explanation: **Explanation:** **Ameloblastoma** is a benign but locally aggressive odontogenic tumor, most commonly occurring in the mandible (80%). It is characterized by its ability to cause significant local destruction and its high rate of recurrence if not treated definitively. **1. Why Surgical Excision is the Correct Answer:** The gold standard for managing Ameloblastoma is **surgical excision with wide margins** (typically 1–1.5 cm of healthy bone). Because the tumor cells infiltrate the surrounding trabecular bone beyond the visible radiological margins, simple "enucleation" or "curettage" leads to high recurrence rates (up to 50–90%). Radical resection ensures the complete removal of these microscopic extensions. **2. Why Other Options are Incorrect:** * **Chemotherapy (A):** Ameloblastoma is not a systemic disease and does not respond to cytotoxic drugs. * **Radiotherapy (B):** Ameloblastomas are notoriously **radioresistant**. Furthermore, radiation in the jaw carries a risk of inducing secondary osteosarcomas or osteoradionecrosis. It is only considered as a last resort for inoperable cases. * **Gene Therapy (C):** While research into BRAF V600E mutations is ongoing, it is currently experimental and not a standard clinical treatment. **Clinical Pearls for NEET-PG:** * **Radiological Appearance:** Classically described as a **"Soap-bubble"** or **"Honey-comb"** appearance (multilocular lucency). * **Most Common Site:** Posterior mandible (molar-ramus area). * **Histopathology:** Features "Stellate reticulum" and "Palisading" of peripheral cells (Vickers-Gorlin criteria). * **Recurrence:** Solid/Multicystic types have the highest recurrence; Unicystic types have a better prognosis.

Question 218: Mid tracheostomy is performed at which level of the tracheal rings?

A. 1st and 2nd tracheal rings
B. 3rd and 4th tracheal rings (Correct Answer)
C. 5th and 6th tracheal rings
D. 7th and 8th tracheal rings

Explanation: **Explanation:** Tracheostomy is a life-saving surgical procedure where an opening is made in the anterior wall of the trachea. The classification of tracheostomy (High, Mid, or Low) is determined by its relationship to the **isthmus of the thyroid gland**, which typically overlies the 2nd, 3rd, and 4th tracheal rings. * **Correct Answer (B):** A **Mid Tracheostomy** is performed at the level of the **2nd, 3rd, or 4th tracheal rings**. This is the most preferred site for elective tracheostomy. During the procedure, the thyroid isthmus is either retracted upwards/downwards or divided to gain access to these rings. This level provides a stable airway while minimizing complications associated with the larynx or the mediastinum. **Analysis of Incorrect Options:** * **Option A (1st and 2nd rings):** This constitutes a **High Tracheostomy**. It is generally avoided because proximity to the cricoid cartilage can lead to perichondritis and subsequent **subglottic stenosis**, a difficult-to-treat complication. * **Option C & D (5th ring and below):** These constitute a **Low Tracheostomy**. These are technically difficult due to the increasing depth of the trachea as it descends. There is also a significant risk of injury to the **innominate artery** (brachiocephalic trunk) and the pleura, potentially leading to fatal tracheo-innominate fistulas or pneumothorax. **Clinical Pearls for NEET-PG:** * **Emergency Airway:** The procedure of choice in an acute "cannot intubate, cannot ventilate" scenario is **Cricothyroidotomy**, not tracheostomy. * **Standard Incision:** A horizontal (transverse) skin incision is preferred for better cosmesis, though a vertical incision may be used in emergencies for speed. * **Bjork Flap:** An inferiorly based tracheal flap (usually at the 3rd ring) sometimes used to facilitate tube re-insertion.

Question 219: A 25-year-old male patient presents with a bony expansile swelling of the right body of the mandible and mild paresthesia of the right inferior dental nerve. An OPG shows a multilocular radiolucency without root resorption. What would be your choice of next investigation?

A. Excision biopsy
B. Aspiration cytology (Correct Answer)
C. CT scan
D. PET bone scan

Explanation: ### Explanation The clinical presentation of a bony expansile swelling in the mandible of a young adult, accompanied by **paresthesia** and a **multilocular radiolucency** on OPG, should immediately raise suspicion for a **Central Giant Cell Granuloma (CGCG)** or, more critically, a **Central Hemangioma of the bone**. **Why Aspiration Cytology is the Correct Choice:** In the mandible, multilocular radiolucencies can represent benign tumors (like Ameloblastoma), cysts (OKC), or vascular malformations. **Aspiration cytology (or Fine Needle Aspiration)** is the mandatory next step to rule out a vascular lesion. If the lesion is a central hemangioma, an unplanned incisional or excision biopsy could lead to **uncontrollable, life-threatening hemorrhage**. A "bloody tap" on aspiration confirms a vascular origin and dictates a completely different surgical approach (e.g., embolization). **Analysis of Incorrect Options:** * **Excision Biopsy:** This is contraindicated as an initial step. If the lesion is vascular, it can lead to fatal bleeding. If it is an Ameloblastoma, simple excision is inadequate (resection is needed). * **CT Scan:** While useful for assessing cortical expansion and surgical planning, it does not provide a tissue diagnosis or rule out the vascular nature as effectively as aspiration in the initial workup. * **PET Bone Scan:** This is used for detecting metabolic activity in malignancies or metastases; it has no role in the primary evaluation of a benign-appearing mandibular swelling. **Clinical Pearls for NEET-PG:** * **Rule of Thumb:** Always aspirate any central bony lesion of the jaws before biopsy to rule out "the great imitator"—Central Hemangioma. * **Root Resorption:** Ameloblastomas typically cause root resorption, whereas CGCG and OKC often do not. * **Paresthesia:** In benign-looking mandibular lesions, paresthesia is a "red flag" that may suggest an aggressive CGCG or a malignancy.

Question 220: Which of the following head and neck tumors has the worst prognosis?

A. Adenoid cystic carcinoma (Correct Answer)
B. Acinic cell carcinoma
C. Cystadenolymphoma
D. Mucoepidermoid carcinoma

Explanation: **Explanation:** The prognosis of salivary gland tumors depends on their histological grade, growth pattern, and tendency for recurrence or metastasis. **Adenoid Cystic Carcinoma (ACC)** is considered the most aggressive among the options provided. While it is often slow-growing, it is notorious for **perineural invasion** (creeping along nerves), which makes complete surgical resection difficult. It has a high rate of local recurrence and, most characteristically, **late distant metastasis** (most commonly to the lungs), even decades after initial treatment. This "relentless" clinical course results in a poor long-term (10–20 year) survival rate. **Analysis of Incorrect Options:** * **Acinic Cell Carcinoma:** Generally considered a low-grade malignancy with a relatively favorable prognosis and low potential for metastasis. * **Cystadenolymphoma (Warthin’s Tumor):** This is a **benign** tumor (the second most common benign salivary tumor). It has no malignant potential and an excellent prognosis. * **Mucoepidermoid Carcinoma:** The prognosis varies by grade. While high-grade versions are aggressive, the majority are low-grade with a much better overall survival rate than Adenoid Cystic Carcinoma. **NEET-PG High-Yield Pearls:** * **Most common salivary gland tumor:** Pleomorphic Adenoma (Benign). * **Most common malignant salivary gland tumor:** Mucoepidermoid Carcinoma. * **Swiss Cheese Appearance:** Classic histological feature of Adenoid Cystic Carcinoma. * **Warthin’s Tumor:** Strongly associated with smoking; often bilateral/multifocal; shows "hot spots" on Technetium-99m pertechnetate scan. * **Nerve Involvement:** If a parotid mass presents with facial nerve palsy, suspect malignancy (most likely ACC or high-grade Mucoepidermoid).

Practice by Chapter

Salivary Gland Diseases

Practice Questions

Thyroid Gland Disorders

Practice Questions

Parathyroid Gland Disorders

Practice Questions

Neck Masses Evaluation

Practice Questions

Oral Cavity Lesions

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Laryngeal Disorders

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Head and Neck Cancer

Practice Questions

Reconstructive Techniques in Head and Neck Surgery

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Surgical Management of Sleep Apnea

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Airway Management in Head and Neck Surgery

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Surgical Approaches to the Neck

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Neck Dissection Techniques

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