Head and Neck Surgery — MCQs

Head and Neck Surgery Indian Medical PG Practice Questions and MCQs

Question 161: Branchial cyst is typically found in relation to which anatomical structure?

A. Midline of the neck
B. Upper and middle third of the sternocleidomastoid muscle at its anterior border (Correct Answer)
C. Nape of the neck
D. Upper one-third along the anterior border of the trapezius

Explanation: ### Explanation **1. Understanding the Correct Answer (Option B)** Branchial cysts are congenital developmental defects arising from the **second branchial cleft** (95% of cases). During embryonic development, the second branchial arch grows downward to cover the third and fourth arches, creating the **cervical sinus of His**. If this sinus fails to obliterate, it forms a cyst. Anatomically, these cysts are characteristically located at the **junction of the upper and middle thirds of the sternocleidomastoid (SCM) muscle along its anterior border**. This specific location corresponds to the point where the second branchial arch remnants are typically sequestered. **2. Analysis of Incorrect Options** * **Option A (Midline of the neck):** This is the classic location for a **Thyroglossal cyst** or a Dermoid cyst. Branchial cysts are always lateral. * **Option C (Nape of the neck):** This is the posterior aspect of the neck. Common pathologies here include lipomas, carbuncles, or a **Cystic Hygroma** (though these are usually in the posterior triangle). * **Option D (Anterior border of the trapezius):** This defines the posterior boundary of the posterior triangle. Branchial cysts are related to the SCM (anterior triangle), not the trapezius. **3. Clinical Pearls for NEET-PG** * **Demographics:** Most commonly presents in young adults (20–30 years) when the cyst becomes infected or enlarges. * **Clinical Feature:** It is a smooth, fluctuant, non-transilluminant swelling. * **Pathognomonic Sign:** Aspiration reveals a "straw-colored" fluid containing **cholesterol crystals**. * **Relation to Vessels:** The cyst lies superficial to the bifurcation of the common carotid artery (the "fork" of the carotids). * **Lining:** Usually lined by stratified squamous epithelium (90%) or columnar epithelium.

Question 162: Cleft palate repair is ideally done at what age?

A. 3 months
B. 1 year (Correct Answer)
C. 3-5 years
D. 6-8 years

Explanation: The timing of cleft palate repair is a critical balance between speech development and facial growth. **Why 1 year is the correct answer:** The primary goal of cleft palate repair (Palatoplasty) is to provide a functional mechanism for **normal speech**. Speech development typically begins around 12–18 months of age. Repairing the palate at approximately **9–12 months** (often simplified to 1 year in exams) ensures that the soft palate musculature is intact before the child begins to develop phonation and articulation, thereby preventing compensatory speech defects and velopharyngeal insufficiency. **Explanation of incorrect options:** * **3 months (Option A):** This is the ideal age for **Cleft Lip repair** (Rule of 10s). Repairing the palate this early is technically difficult due to small tissue volume and carries a high risk of midface growth retardation. * **3-5 years (Option B):** Waiting until this age is too late. By this time, the child will have already developed abnormal speech patterns and "cleft palate speech," which are difficult to correct even after surgery. * **6-8 years (Option D):** This age is typically reserved for secondary procedures like alveolar bone grafting (usually 7–11 years) or orthodontic interventions, not the primary repair. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of 10s (Millard’s Rule for Cleft Lip):** 10 weeks old, 10 lbs weight, 10 g/dL Hemoglobin. * **Surgical Techniques:** Common palate repairs include the **Veau-Wardill-Kilner (V-Y pushback)** and the **Bardach two-flap** palatoplasty. * **Complication:** The most common complication of palatoplasty is the formation of a **palatal fistula**. * **Sequence of Management:** Lip repair (3-6 months) → Palate repair (9-12 months) → Bone grafting (9-11 years).

Question 163: In the classification of cervical lymph nodes, which level corresponds to the anterior compartment?

A. Submandibular
B. Anterior compartment (Correct Answer)
C. Upper jugular
D. Posterior triangle

Explanation: In the Memorial Sloan Kettering Cancer Center (MSKCC) classification, cervical lymph nodes are divided into six levels. **Level VI** specifically corresponds to the **Anterior Compartment**. ### **Explanation of the Correct Answer** Level VI (Anterior Compartment) contains the pre-laryngeal (Delphian), pre-tracheal, para-tracheal, and perithyroidal nodes. Its boundaries are: * **Superior:** Hyoid bone. * **Inferior:** Suprasternal notch. * **Lateral:** Medial borders of the carotid sheaths (sternocleidomastoid muscles). This level is clinically significant as it is the primary site of metastasis for cancers of the thyroid, larynx, and cervical esophagus. ### **Analysis of Incorrect Options** * **A. Submandibular (Level II):** This is incorrect. Level I consists of Submental (IA) and Submandibular (IB) nodes, located above the hyoid bone and below the body of the mandible. * **C. Upper jugular (Level II):** This refers to nodes located around the upper third of the internal jugular vein, extending from the skull base to the hyoid bone. * **D. Posterior triangle (Level V):** This level is bounded by the posterior border of the SCM anteriorly, the anterior border of the trapezius posteriorly, and the clavicle inferiorly. ### **High-Yield Clinical Pearls for NEET-PG** * **Level VII:** Refers to the superior mediastinal nodes (below the suprasternal notch). * **Delphian Node:** A pre-laryngeal node in Level VI; its enlargement often indicates laryngeal or thyroid malignancy. * **Sentinel Node in Oral Cancer:** Usually found in Level I or II. * **Radical Neck Dissection (RND):** Involves removal of Levels I-V along with the SCM, Internal Jugular Vein, and Spinal Accessory Nerve.

Question 164: A lazy S incision is used during which surgical procedure?

A. Seabrook's operation
B. Parotidectomy (Correct Answer)
C. Submandibular calculi removal
D. All of the above

Explanation: The **Lazy S incision**, also known as the **Blair’s incision** (or the modified Blair’s incision), is the standard surgical approach for a **Parotidectomy**. ### 1. Why Parotidectomy is Correct The incision begins pre-auricularly, curves around the earlobe, and extends down into the neck (forming a "Lazy S" shape). This specific design is used for two primary reasons: * **Exposure:** It provides excellent visualization of the parotid gland and the trunk of the **Facial Nerve** (CN VII) as it exits the stylomastoid foramen. * **Cosmesis:** By following the natural skin creases (Langer’s lines) and the contour of the ear, it results in a less conspicuous scar. ### 2. Why Other Options are Incorrect * **Seabrook’s Operation:** This is a historical/less common term sometimes associated with specific drainage procedures, but it does not utilize the Lazy S incision. * **Submandibular Calculi Removal:** Small calculi are usually removed **intra-orally** via an incision in the floor of the mouth. If the entire gland is removed (Submandibular Sialadenectomy), a horizontal incision in the neck (2 cm below the mandible) is used to avoid the marginal mandibular nerve. ### 3. High-Yield Clinical Pearls for NEET-PG * **Modified Blair’s Incision:** The most common variant used today; it is more aesthetically pleasing than the original Blair’s. * **Facial Nerve Landmarks:** During parotidectomy, the nerve is identified using the **Tragal pointer** (nerve is ~1 cm deep and anterior), the **Tympanomastoid suture**, or the **Posterior belly of the digastric muscle**. * **Frey’s Syndrome:** A common post-parotidectomy complication (gustatory sweating) diagnosed by the **Minor’s Starch-Iodine test**.

Question 165: Acinic cell tumor is a tumor of which gland?

A. Parotid gland (Correct Answer)
B. Breast
C. Parathyroid
D. Thyroid

Explanation: **Explanation:** **Acinic Cell Carcinoma (ACC)** is a low-grade malignant salivary gland tumor. It is unique because its cells demonstrate serous acinar differentiation, characterized by cytoplasmic zymogen-type granules. 1. **Why Parotid Gland is correct:** The **Parotid gland** is the most common site for Acinic cell tumors, accounting for approximately **80% of cases**. It is the second most common malignant salivary gland tumor in children (after Mucoepidermoid carcinoma) and the third most common overall in adults. It often presents as a slow-growing, painless swelling, frequently mimicking a benign pleomorphic adenoma. 2. **Why other options are incorrect:** * **Breast:** While the breast contains glandular tissue, primary acinic cell tumors are extremely rare here; the most common malignancies are Ductal or Lobular carcinomas. * **Parathyroid:** Tumors here are typically Adenomas or Hyperplasia, involving chief cells or oxyphil cells, not acinar cells. * **Thyroid:** Thyroid malignancies arise from follicular cells (Papillary/Follicular CA) or parafollicular C-cells (Medullary CA), which do not have acinar morphology. **High-Yield Clinical Pearls for NEET-PG:** * **Bilateralism:** Acinic cell tumor is the **most common malignant** salivary tumor to present **bilaterally** (though Warthin’s tumor is the most common benign bilateral tumor). * **Histology:** Look for "clear cells" or "blue dots" (zymogen granules) on PAS stain. * **Prognosis:** It generally has a favorable prognosis compared to other salivary malignancies, but it can recur or metastasize years after initial treatment. * **Treatment:** Wide local excision is the mainstay of management.

Question 166: Which of the following is a method used for cleft lip repair?

A. Le mesurier's method
B. Tennison's method
C. Millard's method
D. Wardill's method (Correct Answer)

Explanation: **Explanation:** The question asks for a method used for **cleft lip repair**. However, there is a critical distinction in surgical techniques between cleft lip and cleft palate. **Correct Answer Analysis:** * **Wardill’s method (Wardill-Kilner-Veau technique):** This is primarily a **V-Y pushback procedure** used for **Cleft Palate repair**, not cleft lip. In the context of standard surgical classification, if the question intends to identify a "cleft" surgery, Wardill's is a classic eponymous procedure for the palate. *(Note: In many competitive exams, if the options mix lip and palate repairs, it is crucial to distinguish the two. If the question specifically asks for lip repair and lists Wardill as the answer, it may be a technical error in the question source, as Wardill is the gold standard for palate).* **Analysis of Other Options (Cleft Lip Repairs):** * **A. Le Mesurier’s method:** A historical technique for cleft lip repair using a **rectangular flap** to provide length to the lip. * **B. Tennison’s method:** A **triangular flap** technique (Z-plasty principle) used for unilateral cleft lip repair. It is excellent for preserving the Cupid’s bow but can result in a scar that crosses the philtrum. * **C. Millard’s method:** The **Rotation-Advancement flap**. This is currently the **most commonly used** technique for unilateral cleft lip repair worldwide. It preserves the philtral dimple and places the scar along the natural philtral column. **High-Yield Clinical Pearls for NEET-PG:** * **Rule of 10s (for Cleft Lip surgery):** Surgery is usually performed at 10 weeks of age, 10 lbs weight, and 10 g/dL Hemoglobin. * **Cleft Palate Surgery:** Ideally performed between **6 to 12 months** (before the child starts speaking) to prevent speech defects. * **Common Palate Repairs:** Wardill-Kilner (V-Y pushback), von Langenbeck (bipedicled mucoperiosteal flaps), and Furlow’s (double-opposing Z-plasty).

Question 167: What is the most common carcinoma of minor salivary glands?

A. Pleomorphic adenoma
B. Mucoepidermoid carcinoma
C. Adenoid cystic carcinoma (Correct Answer)
D. Warthin's tumor

Explanation: **Explanation:** The distribution of salivary gland tumors follows a specific rule: as the size of the gland decreases, the likelihood of a tumor being malignant increases. While the Parotid gland is the most common site for salivary tumors overall, the **minor salivary glands** (found in the palate, lips, and buccal mucosa) have a high malignancy rate (approx. 50-80%). **Why Adenoid Cystic Carcinoma (ACC) is correct:** Among the malignancies arising from minor salivary glands, **Adenoid Cystic Carcinoma** is the most common. It is characterized by a slow-growing but relentless clinical course, a high propensity for **perineural invasion** (leading to pain and cranial nerve palsies), and a tendency for late distant metastasis (most commonly to the lungs). Histologically, it often shows a classic "Swiss-cheese" (cribriform) pattern. **Analysis of Incorrect Options:** * **Pleomorphic Adenoma (Option A):** This is the most common **benign** tumor of both major and minor salivary glands. The question specifically asks for the most common *carcinoma* (malignancy). * **Mucoepidermoid Carcinoma (Option B):** This is the most common malignant tumor of the **Parotid gland** and the most common salivary malignancy in children. While it occurs in minor glands, ACC is more frequent in that specific location. * **Warthin’s Tumor (Option D):** Also known as Adenolymphoma, this is a benign tumor almost exclusively found in the **Parotid gland** (especially the tail). It is strongly associated with smoking and is often bilateral. **High-Yield Clinical Pearls for NEET-PG:** * **Most common salivary tumor overall:** Pleomorphic Adenoma (Parotid). * **Most common site for minor salivary gland tumors:** Hard Palate. * **Hot Spot:** Adenoid Cystic Carcinoma is notorious for **skip lesions** along nerves; therefore, wide surgical excision with nerve sacrifice or postoperative radiotherapy is often required. * **Rule of 80s (Parotid):** 80% are in the parotid, 80% are benign, 80% are Pleomorphic Adenoma.

Question 168: What is true about Cystic Hygroma?

A. Most common in adults
B. Does not transilluminate
C. Lined by stratified squamous epithelium
D. Develops from jugular lymphatic sequestration (Correct Answer)

Explanation: **Explanation:** **Cystic Hygroma** (also known as macrocystic lymphatic malformation) is a congenital malformation of the lymphatic system. **1. Why Option D is Correct:** The embryological basis of cystic hygroma lies in the failure of the **jugular lymphatic sacs** to communicate with the internal jugular vein. This results in the sequestration of lymphatic tissue, which then undergoes cystic dilatation due to the accumulation of lymph. These sequestrations typically occur in areas where primitive lymph sacs develop, most commonly the posterior triangle of the neck (75-80%). **2. Why the Other Options are Incorrect:** * **Option A:** It is primarily a pediatric condition. About 50-60% are present at birth, and nearly 90% manifest by the age of two. It is rare in adults. * **Option B:** Cystic hygromas are filled with clear, straw-colored fluid and have very thin walls. Therefore, they **brilliantly transilluminate**, which is a key clinical diagnostic feature. * **Option C:** As a lymphatic malformation, it is lined by a **single layer of endothelium** (flattened cells), not stratified squamous epithelium (which would be characteristic of a dermoid cyst). **3. High-Yield Clinical Pearls for NEET-PG:** * **Clinical Presentation:** A soft, painless, compressible, and fluctuant mass, typically in the posterior triangle of the neck. It increases in size when the child coughs or cries (due to increased intrathoracic pressure). * **Associations:** Frequently associated with chromosomal abnormalities, most notably **Turner Syndrome** (45, XO), Down Syndrome (Trisomy 21), and Noonan Syndrome. * **Complications:** Sudden enlargement may occur due to hemorrhage or infection. Large lesions can cause airway obstruction. * **Treatment:** Surgical excision is the traditional gold standard. However, **Sclerotherapy** (using agents like OK-432/Picibanil or Bleomycin) is now a preferred primary treatment for macrocystic lesions.

Question 169: A patient with T3N2AM0 lower alveolar carcinoma requires which of the following management options?

A. Surgery (Correct Answer)
B. Surgery + Radiotherapy
C. Radiotherapy
D. Chemotherapy

Explanation: **Explanation:** The management of oral cavity cancers, specifically lower alveolar carcinoma, is primarily driven by the anatomical site and the stage of the disease. **1. Why Surgery is the Correct Answer:** For squamous cell carcinoma of the oral cavity (including the lower alveolus), **surgery is the primary and definitive treatment modality**. In a T3N2AM0 case, the "T3" status (tumor >4cm) and "N2" status (clinically positive nodes) necessitate a composite resection. This typically involves a **Commandos operation** (Commando procedure): Wide local excision of the primary tumor + Mandibulectomy (due to proximity/invasion of the bone) + Neck Dissection (to address N2 nodal disease) + Reconstruction (e.g., PMMC or free fibula flap). While adjuvant therapy is often needed later, the *initial* and most crucial management step is surgical resection. **2. Why Other Options are Incorrect:** * **Surgery + Radiotherapy:** While this patient will almost certainly require postoperative radiotherapy (due to T3 stage and N2 nodes), the question asks for the "management option." In surgical oncology, the primary modality is listed first. If the question asks for the *complete* plan, this might be considered, but in NEET-PG, surgery remains the "gold standard" primary intervention for resectable oral cancers. * **Radiotherapy/Chemotherapy:** These are generally reserved as palliative options or for unresectable cases. Oral cavity cancers are relatively radioresistant compared to oropharyngeal cancers, and bone involvement (common in alveolar CA) is a relative contraindication for primary RT due to the risk of osteoradionecrosis. **Clinical Pearls for NEET-PG:** * **T3 Stage:** Tumor > 4 cm or depth of invasion (DOI) > 10 mm. * **Mandibular involvement:** If the tumor is fixed to the bone, a partial or segmental mandibulectomy is mandatory. * **N2 Stage:** Indicates nodal metastasis (N2a: single ipsilateral >3cm but <6cm; N2b: multiple ipsilateral <6cm; N2c: bilateral/contralateral <6cm). * **High-Yield:** For oral cavity, **Surgery > RT**. For oropharynx/nasopharynx, **RT/Chemo-RT** is often preferred.

Question 170: A 5cm suspicious-looking lesion of the oral mucosa should be:

A. Incised and sent for biopsy (Correct Answer)
B. Excised and sent for biopsy
C. Irradiated
D. Offered palliative treatment

Explanation: **Explanation:** The primary objective in managing a large (5cm) suspicious oral lesion is to establish a definitive histological diagnosis before planning definitive treatment. **1. Why Option A is Correct:** For lesions larger than 1–2 cm or those where malignancy is suspected, an **Incisional Biopsy** is the gold standard. A 5cm lesion is too large for primary excision without knowing the pathology, as the surgical margins required for a malignancy (usually 1–2 cm) would result in significant, potentially unnecessary morbidity or deformity. An incisional biopsy allows the surgeon to sample the most representative area (usually the edge of the lesion including some healthy tissue) to determine the tumor type and grade. **2. Why the other options are incorrect:** * **Option B (Excised):** Excisional biopsy is reserved for small lesions (typically <1 cm) where the entire lesion can be removed with a margin of healthy tissue in one sitting. Excising a 5cm lesion without a diagnosis is poor surgical practice. * **Option C (Irradiated):** Radiotherapy is a treatment modality, not a diagnostic one. It is never initiated without a tissue-proven diagnosis of malignancy. * **Option D (Palliative treatment):** Palliation is only considered for end-stage, metastatic, or unresectable disease. A 5cm lesion may still be curable depending on the histology and nodal status. **Clinical Pearls for NEET-PG:** * **Punch Biopsy:** Often used for oral mucosal lesions due to ease and accuracy. * **Avoid Necrosis:** When performing an incisional biopsy, avoid sampling only the necrotic center; the **proliferating margin** provides the most accurate diagnostic architecture. * **Toluidine Blue:** Can be used pre-operatively to highlight areas of DNA activity to guide the biopsy site. * **Rule of Thumb:** Any oral ulcer persisting for more than **2 weeks** despite removing local irritants must be biopsied to rule out Squamous Cell Carcinoma (SCC).

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

Practice Questions

Laryngeal Disorders

Practice Questions

Head and Neck Cancer

Practice Questions

Reconstructive Techniques in Head and Neck Surgery

Practice Questions

Surgical Management of Sleep Apnea

Practice Questions

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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