Head and Neck Surgery Practice Questions

Q: A 3 cm squamous cell carcinoma of the retrornolar trigone is invading the mandible and the medial pterygoid muscle. What is the TNM stage of this tumor?

Stage IV. ### Explanation The TNM staging for Oral Cavity cancers (including the retromolar trigone) is based on the size and depth of invasion (T), nodal involvement (N), and metastasis (M). **1. Why Stage IV is Correct:** According to the AJCC 8th Edition, the T-stage is determined by the extent of local invasion. * **T4a (Moderately Advanced Local Disease):** The tumor invades adjacent structures such as the cortical bone of the mandible or maxilla, deep (extrinsic) muscles of the tongue, maxillary sinus, or skin of the face. * **T4b (Very Advanced Local Disease):** The tumor invades the masticator space (which includes the **medial pterygoid muscle**), pterygoid plates, or skull base, and/or encases the internal carotid artery. In this case, invasion into the **medial pterygoid muscle** automatically classifies the tumor as **T4b**. Any T4 tumor (T4a or T4b) with any N or M status results in a **Stage IV** designation (specifically Stage IVB for T4b). **2. Why Other Options are Incorrect:** * **Stage I:** Requires a T1 tumor (≤2 cm and Depth of Invasion [DOI] ≤5 mm) with no nodal involvement. * **Stage II:** Requires a T2 tumor (>2 cm and ≤4 cm, DOI ≤10 mm) with no nodal involvement. * **Stage III:** Requires a T3 tumor (>4 cm or DOI >10 mm) or a T1/T2/T3 tumor with a single ipsilateral lymph node ≤3 cm (N1). **3. Clinical Pearls for NEET-PG:** * **Retromolar Trigone (RMT):** A unique site where the mucosa is closely attached to the bone; hence, early bone invasion is common. * **Masticator Space:** Involvement of the medial pterygoid often presents clinically as **trismus** (lockjaw), which is a "red flag" for T4b disease. * **Bone Invasion:** Superficial erosion of bone/tooth socket by a gingival primary is not enough to classify as T4; there must be invasion through the cortical bone.

Q: What is the standard treatment for stage T3N1 carcinoma of the maxilla?

Surgery and radiation. **Explanation:** The management of maxillary sinus carcinoma is determined by the clinical stage. **Stage T3N1** represents advanced local disease (T3: invasion of the posterior wall, floor/medial wall of the orbit, or ethmoid sinus) with regional lymph node involvement (N1). 1. **Why Option B is correct:** For advanced-stage (Stage III and IV) squamous cell carcinoma of the maxilla, the standard of care is **multimodal therapy**. Surgery (typically a total or extended maxillectomy) followed by **adjuvant radiotherapy** is the gold standard. Post-operative radiation is mandatory in T3/T4 tumors or when nodal disease (N1) is present to improve local control and address potential microscopic residual disease. 2. **Why other options are incorrect:** * **Option A (Surgery only):** This is reserved for very early, localized T1 or T2 tumors with no nodal involvement. In T3N1, the risk of recurrence is unacceptably high with surgery alone. * **Option B (Radiation only):** Radiation alone has poor cure rates for bone-invasive maxillary tumors and is generally reserved for palliative cases or patients unfit for surgery. * **Option D (Chemoradiation):** While definitive chemoradiation is common in oropharyngeal or laryngeal cancers, in maxillary sinus tumors, surgical resection remains the primary treatment modality whenever the tumor is resectable. **Clinical Pearls for NEET-PG:** * **Ohngren’s Line:** An imaginary line connecting the medial canthus to the angle of the mandible. Tumors **posterosuperior** to this line have a worse prognosis. * **Most common histology:** Squamous cell carcinoma (80%). * **Lymphatic drainage:** Primarily to the submandibular and deep cervical nodes. * **Infrastructure vs. Suprastructure:** Tumors of the infrastructure (below the level of the maxillary sinus floor) have a better prognosis than those of the suprastructure.

Q: Pleomorphic adenoma is most commonly found in which salivary gland?

Parotid gland. **Explanation:** **Pleomorphic Adenoma (Benign Mixed Tumor)** is the most common salivary gland tumor, accounting for approximately 60–70% of all salivary gland neoplasms. 1. **Why Parotid Gland is Correct:** The **Parotid gland** is the most frequent site for both salivary gland tumors in general and Pleomorphic Adenoma specifically. About 80% of all salivary gland tumors occur in the parotid, and 80% of those are Pleomorphic Adenomas. It typically presents as a slow-growing, painless, firm swelling at the angle of the jaw, most commonly involving the superficial lobe. 2. **Why Other Options are Incorrect:** * **Submandibular Gland:** Only about 10% of salivary tumors occur here. While Pleomorphic Adenoma is still the most common benign tumor of this gland, its overall incidence is much lower than in the parotid. * **Sublingual Gland:** Tumors here are rare (approx. 1%). Notably, a tumor in the sublingual gland has an 80% chance of being **malignant** (e.g., Adenoid Cystic Carcinoma). * **Lacrimal Gland:** While Pleomorphic Adenoma can occur in the lacrimal gland (the most common epithelial tumor there), it is far less frequent than in the major salivary glands. **Clinical Pearls for NEET-PG:** * **Rule of 80s:** 80% of salivary tumors are in the Parotid; 80% of Parotid tumors are Pleomorphic Adenoma; 80% occur in the superficial lobe. * **Histology:** Characterized by a "mixed" appearance—epithelial elements (ducts/acini) and mesenchymal-like stroma (myxoid, chondroid, or osteoid). * **Treatment:** Superficial parotidectomy with preservation of the **Facial Nerve**. Simple enucleation is avoided due to the risk of recurrence from "pseudopods" (microscopic projections through the capsule). * **Malignant Transformation:** Long-standing cases can transform into **Carcinoma ex pleomorphic adenoma**.

Q: What is the name of the incision shown below?

Weber-Ferguson incision. ***Weber-Ferguson incision*** - A **lip-split incision** that extends from the **philtrum** through the **alar base** and along the **infraorbital rim**, providing excellent exposure for **maxillectomy** procedures. - Specifically designed for **total maxillectomy** and **rhinectomy**, allowing wide access to the **maxillary sinus** and **nasal cavity** while maintaining good cosmetic outcomes. *Lazy 'S' incision* - A **parotidectomy incision** that follows a curved **S-shaped** path from the **preauricular** area to the **neck**, used specifically for **parotid gland** surgery. - Does not involve **lip-splitting** or **facial extension** like the Weber-Ferguson, making it unsuitable for **maxillary** procedures. *Sistrunk incision* - A **horizontal neck incision** used specifically for **thyroglossal duct cyst** excision, located over the **hyoid bone** level. - Does not provide any **facial** or **maxillary** access, being limited to **central neck** pathology only. *Modified Blair's* - A **parotidectomy incision** that extends from the **preauricular** area around the **ear lobule** into the **neck**, used for **parotid gland** procedures. - Like the Lazy S, it's designed for **parotid surgery** and does not involve **midface** or **maxillary** exposure.

Q: A 58-year-old woman undergoes excision biopsy of a tumor in the left posterior triangle of her neck. Histology suggests that this is a metastatic cancer. What is the most likely site of the primary tumor?

Piriform fossa. **Explanation:** The clinical presentation of a metastatic lymph node in the **posterior triangle** (Level V) of the neck in an adult most commonly points to a primary malignancy within the **Upper Aerodigestive Tract (UADT)**. **1. Why Piriform Fossa is Correct:** The piriform fossa is a part of the hypopharynx. Tumors in this region are notorious for being "clinically silent" in their early stages while having a rich lymphatic network. Consequently, they often present first as a metastatic neck mass. While Level II and III nodes are more common, hypopharyngeal and nasopharyngeal carcinomas are the most frequent primary sources for metastases found in the **posterior triangle (Level V)**. **2. Why Incorrect Options are Wrong:** * **Ovary, Adrenal Gland, and Kidney:** These are infraclavicular (below the diaphragm) organs. While they can metastasize to the neck, they typically involve the **Supraclavicular nodes** (specifically the left supraclavicular node, known as **Virchow’s node** or Troisier’s sign) via the thoracic duct. They do not typically present as isolated posterior triangle masses. **3. NEET-PG High-Yield Pearls:** * **Rule of 80:** In a non-thyroid neck mass in an adult, 80% are neoplastic; of those, 80% are malignant; of those, 80% are metastatic; and of those, 80% arise from primaries above the clavicle. * **Levels of Neck Nodes:** * **Level V (Posterior Triangle):** Think Nasopharynx, Hypopharynx, or Scalp. * **Level II (Upper Jugular):** Think Oral cavity, Oropharynx. * **Silent Areas:** Always check the "blind spots" (Nasopharynx, Tonsil, Base of tongue, and Piriform fossa) in any case of occult primary neck metastasis.

Q: The Berger flap procedure is used for which of the following conditions?

Oro-antral communication. **Explanation:** The **Berger flap** (also known as the buccal fat pad flap or the sliding buccal flap) is a classic surgical technique used for the closure of an **Oro-antral communication (OAC)** or fistula. 1. **Why it is correct:** An OAC is an abnormal opening between the maxillary sinus and the oral cavity, commonly occurring after the extraction of maxillary molars. The Berger flap involves a trapezoidal, full-thickness mucoperiosteal flap raised from the buccal vestibule and advanced over the defect. Because the buccal mucosa is elastic, it can be "slid" and sutured to the palatal mucosa to create a tension-free primary closure. 2. **Why other options are incorrect:** * **TMJ Ankylosis:** This condition requires arthroplasty (gap or interpositional) using materials like temporal fascia or costochondral grafts, not a buccal mucosal flap. * **TMJ Dislocation:** Acute cases are managed by manual reduction (Hippocratic maneuver); chronic cases may require eminectomy or capsular plication. * **Pericoronitis:** This is an inflammation of the tissue surrounding a partially erupted tooth (usually the third molar) and is managed with irrigation, antibiotics, or operculectomy. **High-Yield Clinical Pearls for NEET-PG:** * **Rehrmann’s Flap:** Another name for the buccal advancement flap used for OAC closure. * **Gold Standard:** For defects larger than 5mm or those persisting for more than 48 hours, surgical closure (like the Berger flap) is mandatory. * **Buccal Fat Pad (BFP):** Often used in conjunction with the Berger flap (double-layered closure) because the BFP is highly vascular and promotes rapid healing. * **Post-op instruction:** Patients must avoid sneezing with a closed mouth or using a straw to prevent pressure changes that could dehisce the flap.

Q: A patient presents with a 1.5 cm fibroma on the floor of the mouth. What type of biopsy is recommended?

Incisional biopsy. **Explanation:** The management of oral lesions depends primarily on the size and clinical suspicion of the lesion. For a **1.5 cm fibroma on the floor of the mouth**, an **incisional biopsy** is the recommended approach. The floor of the mouth is a high-risk area for malignancy and contains vital structures (submandibular ducts, lingual nerves). According to surgical principles, any oral lesion larger than **1 cm** or those with suspicious features should undergo an incisional biopsy first. This allows for a definitive histological diagnosis without performing an extensive primary surgery that might compromise margins if the lesion proves to be malignant. **Analysis of Options:** * **Excisional Biopsy (Incorrect):** This is reserved for small, clinically benign lesions (usually **<1 cm**). Attempting excision on a 1.5 cm lesion in the floor of the mouth without a diagnosis may lead to inadequate margins or unnecessary morbidity. * **Punch Biopsy (Incorrect):** While useful for skin or certain fixed oral sites (like the hard palate), it is less ideal for the mobile, soft tissue of the floor of the mouth where depth control and representative sampling are better achieved via a scalpel incisional biopsy. * **Brush Biopsy (Incorrect):** This is a cytological screening tool, not a diagnostic biopsy. It cannot differentiate between invasive carcinoma and carcinoma in situ. **High-Yield Clinical Pearls for NEET-PG:** * **Size Rule:** Lesion 1 cm → Incisional. * **Location:** The floor of the mouth and the ventrolateral tongue are the most common sites for oral squamous cell carcinoma (SCC). * **Technique:** When performing an incisional biopsy, always include a sample of the **junction between the lesion and normal-appearing tissue** to help the pathologist assess invasion.

Q: A 70-year-old male presented with an asymptomatic white patch on the oral cavity following the application of a denture. What is the treatment of choice?

Ascertaining the denture is fitting completely. **Explanation:** The clinical presentation describes a classic case of **Frictional Keratosis**, a reactive white patch caused by chronic mechanical irritation—in this case, an ill-fitting denture. **1. Why Option C is Correct:** The primary management of any white patch in the oral cavity is to identify and eliminate the inciting factor. Frictional keratosis is a benign hyperkeratotic response to trauma. By **ascertaining the denture fit** and adjusting it, the source of irritation is removed. If the lesion is indeed frictional, it should resolve or significantly improve within 2–3 weeks after the adjustment. **2. Why Other Options are Incorrect:** * **Option A (Radiotherapy):** Radiotherapy is never used for benign reactive lesions or undiagnosed white patches. It is reserved for confirmed malignancies. * **Option B (Biopsy of all tissues):** While biopsy is the gold standard for diagnosing Leukoplakia (a premalignant condition), the first step for a lesion with a clear mechanical cause (denture) is to remove the cause. A biopsy is only indicated if the lesion persists after the irritant is removed. * **Option D (Antibiotics):** White patches (keratosis) represent epithelial thickening, not an acute bacterial infection. Antibiotics have no role in management. **Clinical Pearls for NEET-PG:** * **Rule of Thumb:** Any oral white patch that does not rub off is "Leukoplakia" by clinical definition, but if a cause (like a sharp tooth or denture) is present, it is "Frictional Keratosis." * **The 2-Week Rule:** If a lesion persists 14 days after removing the suspected irritant, a **biopsy** (usually incisional) is mandatory to rule out dysplasia or squamous cell carcinoma. * **Homogeneous vs. Non-homogeneous:** Homogeneous leukoplakia has a lower malignant transformation rate compared to speckled (erythroleukoplakia) or nodular variants.

Q: Which of the following structures is preserved in a functional radical dissection of the neck, except?

Lymph nodes. In neck dissection terminology, the goal of the surgery determines which structures are removed. The primary objective of any neck dissection for malignancy is the systematic removal of **lymph nodes**. ### 1. Why "Lymph Nodes" is the Correct Answer A **Functional Radical Neck Dissection (FRND)**, also known as a Modified Radical Neck Dissection (MRND) Type I, II, or III, is defined by the preservation of one or more non-lymphatic structures that are routinely removed in a Classical Radical Neck Dissection (RND). Since the very purpose of the surgery is to treat or prevent nodal metastasis, the **lymph nodes are never preserved**; they are the target tissue. ### 2. Explanation of Incorrect Options (Structures Preserved) In a **Modified/Functional Radical Neck Dissection**, the following three key non-lymphatic structures are intentionally preserved to reduce morbidity: * **Accessory Nerve (CN XI):** Preserved to prevent "Shoulder Syndrome" (shoulder drop and pain due to trapezius paralysis). * **Internal Jugular Vein (IJV):** Preserved to maintain venous drainage and prevent intracranial pressure spikes (especially critical in bilateral cases). * **Sternocleidomastoid Muscle (SCM):** Preserved to maintain neck contour and protect the carotid sheath. ### 3. Clinical Pearls for NEET-PG * **Radical Neck Dissection (RND):** Removes Level I-V lymph nodes + SCM + IJV + Spinal Accessory Nerve. * **MRND Type I:** Preserves Accessory Nerve. * **MRND Type II:** Preserves Accessory Nerve + IJV. * **MRND Type III (Functional):** Preserves all three (Accessory Nerve + IJV + SCM). * **High-Yield Fact:** The most common nerve injured during neck dissection (excluding the accessory nerve) is the **Marginal Mandibular Nerve**, leading to drooping of the corner of the mouth.

Question 1

A 3 cm squamous cell carcinoma of the retrornolar trigone is invading the mandible and the medial pterygoid muscle. What is the TNM stage of this tumor?

Accepted Answer

Stage IV

Answer

Stage I

Answer

Stage II

Answer

Stage III

Question 2

What is the standard treatment for stage T3N1 carcinoma of the maxilla?

Accepted Answer

Surgery and radiation

Answer

Surgery only

Answer

Radiation therapy only

Answer

Chemotherapy and radiation

Question 3

Pleomorphic adenoma is most commonly found in which salivary gland?

Accepted Answer

Parotid gland

Answer

Sublingual gland

Answer

Submandibular gland

Answer

Lacrimal gland

Question 4

Facial nerve injury occurs during parotid surgery. What is the best management?

Accepted Answer

Immediate repair

Answer

Repair at a later date

Answer

Physiotherapy

Answer

No intervention

Question 5

What is the name of the incision shown below?

Accepted Answer

Weber-Ferguson incision

Answer

Lazy 'S' incision

Answer

Sistrunk incision

Answer

Modified Blair's

Question 6

A 58-year-old woman undergoes excision biopsy of a tumor in the left posterior triangle of her neck. Histology suggests that this is a metastatic cancer. What is the most likely site of the primary tumor?

Accepted Answer

Piriform fossa

Answer

Ovary

Answer

Adrenal gland

Answer

Kidney

Question 7

The Berger flap procedure is used for which of the following conditions?

Accepted Answer

Oro-antral communication

Answer

Temporomandibular joint (TMJ) ankylosis

Answer

Temporomandibular joint (TMJ) dislocation

Answer

Pericoronitis

Question 8

A patient presents with a 1.5 cm fibroma on the floor of the mouth. What type of biopsy is recommended?

Accepted Answer

Incisional biopsy

Answer

Excisional biopsy

Answer

Punch biopsy

Answer

Brush biopsy

Question 9

A 70-year-old male presented with an asymptomatic white patch on the oral cavity following the application of a denture. What is the treatment of choice?

Accepted Answer

Ascertaining the denture is fitting completely

Answer

Low dose radiotherapy

Answer

Biopsy of all the tissues

Answer

Antibiotics

Question 10

Which of the following structures is preserved in a functional radical dissection of the neck, except?

Accepted Answer

Lymph nodes

Answer

Internal jugular vein

Answer

Sternomastoid muscle

Answer

Accessory nerve

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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