Head and Neck Surgery Practice Questions

Q: What is the most common lymph node group involved in tuberculous lymphadenitis?

Posterior cervical. **Explanation:** Tuberculous lymphadenitis (Scrofula) is the most common form of extrapulmonary tuberculosis. In the head and neck region, the **Posterior Cervical** lymph nodes (Level V) are the most frequently involved group. This is a high-yield fact for NEET-PG, as it differs from pyogenic infections which typically involve the anterior chain. * **Why Posterior Cervical is correct:** Unlike pyogenic lymphadenitis which usually spreads from the tonsils or pharynx to the jugulodigastric nodes, TB bacilli often reach the cervical nodes via the lymphatic drainage from the adenoids or through hematogenous spread. Statistically, the posterior triangle nodes are the primary site of involvement in over 50% of cases. * **Why other options are incorrect:** * **Axillary:** While TB can involve axillary nodes, it is far less common than cervical involvement (which accounts for ~70-80% of all peripheral TB lymphadenopathy). * **Intraabdominal:** These nodes (mesenteric) are involved in intestinal TB, but peripheral lymphadenopathy is more common overall. * **Jugulodigastric:** This is the most common node involved in **acute pyogenic tonsillitis** and oral infections, not typically the primary site for TB. **Clinical Pearls for NEET-PG:** * **Presentation:** Characteristically presents as "cold abscesses" (lack of inflammation/heat) and may lead to a **"Collar-stud abscess"** when the infection breaches the deep fascia. * **Diagnosis:** Fine Needle Aspiration Cytology (FNAC) is the initial investigation of choice, showing caseating granulomas. * **Treatment:** Standard Antitubercular Therapy (ATT) for 6 months. Surgery is rarely indicated except for biopsy or drainage of large abscesses.

Q: A 45-year-old man presents with progressive cervical lymph node enlargement for the past 3 months. Which is the most diagnostic investigation?

Lymph node biopsy. **Explanation:** In the evaluation of persistent cervical lymphadenopathy (lasting >3 weeks), the primary goal is to differentiate between reactive, infectious (e.g., Tuberculosis), and neoplastic (e.g., Lymphoma or Metastasis) etiologies. **Why Lymph Node Biopsy is the Correct Answer:** Excisional biopsy is considered the **Gold Standard** and the most diagnostic investigation. Unlike cytology, a biopsy preserves the **node architecture**, which is critical for diagnosing lymphomas (distinguishing Hodgkin’s vs. Non-Hodgkin’s) and performing Immunohistochemistry (IHC). It provides a larger tissue sample, ensuring higher sensitivity and specificity for definitive diagnosis. **Analysis of Incorrect Options:** * **Fine Needle Aspiration Cytology (FNAC):** While FNAC is often the *initial* investigation of choice due to its speed and low cost, it is not the most diagnostic. It only provides cellular detail (cytology) and cannot evaluate the tissue architecture. It has a high false-negative rate in lymphomas. * **X-ray of Soft Tissues:** This is a non-specific imaging modality. While it may show calcifications (suggestive of healed TB) or soft tissue shadows, it cannot provide a pathological diagnosis. * **None of the above:** Incorrect, as biopsy is the definitive diagnostic tool. **NEET-PG High-Yield Pearls:** * **Initial Investigation:** FNAC is usually done first. * **Gold Standard/Definitive Investigation:** Excisional Biopsy. * **Biopsy Technique:** Excisional biopsy (removing the whole node) is preferred over incisional biopsy to prevent sampling errors and tumor seeding. * **Most common cause of chronic cervical lymphadenopathy in India:** Tuberculosis. * **Supraclavicular nodes (Virchow’s node):** Always pathological; usually indicates an underlying malignancy (e.g., Gastric Cancer).

Q: An edentulous 72-year-old man with a 50-year history of cigarette smoking presents with a nontender, hard mass in the lateral neck. What is the simplest way to establish an accurate histological diagnosis of a neck mass suspected to be cancerous?

Fine needle aspiration cytology. ### Explanation **1. Why Fine Needle Aspiration Cytology (FNAC) is Correct:** In an elderly patient with a history of smoking, a hard, nontender lateral neck mass is considered a **metastatic lymph node from an upper aerodigestive tract squamous cell carcinoma (SCC)** until proven otherwise. FNAC is the **gold standard initial investigation** for any neck mass. It is simple, minimally invasive, cost-effective, and has high sensitivity and specificity (often >90%) for diagnosing malignancy. Crucially, it provides a tissue-based diagnosis without the risks of an open biopsy (such as tumor seeding or compromising future neck dissection planes). **2. Why the Other Options are Incorrect:** * **Bone marrow biopsy:** This is used for hematological malignancies (like leukemia or certain stages of lymphoma). While lymphoma can cause neck masses, it is not the primary suspicion in a heavy smoker with a hard, fixed mass. * **Nasopharyngoscopy:** While this is a vital part of the "work-up" to find the **primary tumor** (especially in the occult primary setting), it does not provide a histological diagnosis of the *neck mass* itself. * **CT scan of the head and neck:** This is an imaging modality used for staging and assessing the extent of the disease (involvement of vessels/bones). It provides anatomical detail but cannot provide a histological/cytological diagnosis. **3. Clinical Pearls for NEET-PG:** * **Rule of 80:** In non-thyroid neck masses in adults, 80% are neoplastic; of those, 80% are malignant; of those, 80% are metastatic SCC. * **Avoid Incisional Biopsy:** Never perform an incisional or excisional biopsy of a suspected metastatic neck node before a thorough search for the primary and an FNAC. * **Triple Endoscopy (Panendoscopy):** If FNAC confirms SCC but no primary is seen on physical exam, the next step is panendoscopy (laryngoscopy, esophagoscopy, and bronchoscopy) with directed biopsies.

Q: A 4-year-old girl scheduled for tonsillectomy presents with a painless, mobile, cystic midline neck swelling measuring 2 x 1.1 x 1 cm, located just below the hyoid bone. Ultrasound revealed a thick-walled cystic lesion. What is the recommended management for this condition?

Surgical removal. ### Explanation **Diagnosis: Thyroglossal Duct Cyst (TGDC)** The clinical presentation of a **painless, mobile, midline neck swelling** in a child, specifically located near the hyoid bone, is classic for a Thyroglossal Duct Cyst. This occurs due to the failure of the thyroglossal duct to obliterate during the descent of the thyroid gland from the foramen caecum to its adult position. **1. Why Surgical Removal is Correct:** The definitive management for a TGDC is surgical excision, specifically the **Sistrunk Operation**. This procedure involves removing the cyst, the entire tract, and the **central portion of the hyoid bone** to minimize the high risk of recurrence. Surgery is recommended even if asymptomatic to prevent recurrent infections, abscess formation, or the rare risk of papillary thyroid carcinoma (1%). **2. Why Other Options are Incorrect:** * **Antibiotics:** These are only indicated if the cyst becomes acutely infected (thyroglossal duct abscess). They do not treat the underlying anatomical defect. * **Percutaneous Aspiration:** This is contraindicated as a primary treatment because it carries a high risk of infection and does not prevent recurrence. It is only used for diagnostic cytology if malignancy is suspected. * **Chest X-ray:** This has no role in the diagnosis or management of a midline neck swelling. However, an **Ultrasound of the neck** is vital to confirm the presence of a normal thyroid gland in its anatomical position before surgery. **3. NEET-PG High-Yield Pearls:** * **Movement:** TGDC is unique because it **moves upwards on protrusion of the tongue** (due to its attachment to the hyoid/foramen caecum) and on deglutition. * **Most Common Site:** Sub-hyoid (as seen in this case). * **Sistrunk Procedure:** Key step is the removal of the body of the hyoid bone. * **Differential Diagnosis:** Dermoid cyst (does not move with tongue protrusion) and Ectopic Thyroid (must be ruled out via USG).

Q: Radical neck dissection involves the removal of which of the following structures?

Spinal accessory nerve. **Explanation:** The **Radical Neck Dissection (RND)**, originally described by Crile, is the gold standard against which all other neck dissections are compared. It involves the removal of lymph node levels I through V along with three specific non-lymphatic structures. **1. Why Option A is correct:** In a classic Radical Neck Dissection, the **Spinal Accessory Nerve (CN XI)** is routinely sacrificed along with the **Internal Jugular Vein (IJV)** and the **Sternocleidomastoid (SCM) muscle**. The removal of CN XI leads to "Shoulder Syndrome," characterized by shoulder pain and limited abduction due to trapezius muscle atrophy. **2. Analysis of Incorrect Options:** * **Option B (External Jugular Vein):** While the EJV is typically removed during the procedure, it is not one of the "three hallmark structures" (SCM, IJV, CN XI) that define the transition from a Radical to a Modified Radical Neck Dissection (MRND). * **Option C (Tail of the parotid gland):** The tail of the parotid is often included in Level II clearance to ensure adequate lymphadenectomy, but it is considered an incidental removal rather than a defining component of the RND. * **Option D (All of the above):** This is incorrect because the question tests the specific anatomical landmarks that define the radicality of the procedure. **High-Yield Clinical Pearls for NEET-PG:** * **Modified Radical Neck Dissection (MRND):** Removal of lymph nodes (I-V) with preservation of one or more non-lymphatic structures. * **Type I:** CN XI preserved. * **Type II:** CN XI and IJV preserved. * **Type III (Functional Neck Dissection):** CN XI, IJV, and SCM all preserved. * **Selective Neck Dissection:** Only specific lymph node levels are removed (e.g., Supraomohyoid dissection for oral cavity cancers). * **Boundary:** The posterior limit of a radical neck dissection is the anterior border of the **trapezius muscle**.

Q: What is the most common pathology seen in the scalp?

Sebaceous cyst. **Explanation:** The scalp is the most common site in the body for **sebaceous cysts** (also known as pilar or trichilemmal cysts). This is due to the high density of hair follicles and associated sebaceous glands in the scalp. These cysts arise from the outer root sheath of the hair follicle. Clinically, they are characterized by being firm, non-tender, and attached to the skin (often showing a characteristic **punctum**), but they remain mobile over the underlying aponeurosis. **Analysis of Options:** * **A. Dermoid:** While dermoid cysts (specifically external angular dermoids) are common in the head and neck region, they occur along lines of embryonic fusion. They are deep to the skin and often fixed to the periosteum, making them less common than sebaceous cysts. * **C. Hemangioma:** These are common benign vascular tumors of infancy, but they are not the most frequent pathology of the scalp across the general population. * **D. Metastasis:** The scalp can be a site for cutaneous metastasis (e.g., from follicular thyroid carcinoma or renal cell carcinoma), but this is a rare occurrence compared to benign cystic lesions. **NEET-PG High-Yield Pearls:** * **Cock’s Peculiar Tumor:** A sebaceous cyst on the scalp that suppurates and ulcerates, mimicking a Squamous Cell Carcinoma (fungating appearance). * **Turban Tumor:** Refers to a **cylindroma**, a benign adnexal tumor that can cover the entire scalp. * **Layers of Scalp:** Remember the mnemonic **SCALP** (Skin, Connective tissue, Aponeurosis, Loose areolar tissue, Periosteum). Sebaceous cysts reside in the **Skin** layer. * **Emissary Veins:** Located in the "Dangerous area of the scalp" (Loose areolar tissue), they can transmit infection from the scalp to the intracranial dural venous sinuses.

Q: What is the preferred single-agent chemotherapy drug for carcinoma of the cheek?

Cisplatin. **Explanation:** **Cisplatin** is the gold-standard single-agent chemotherapy drug for Squamous Cell Carcinoma (SCC) of the head and neck, including carcinoma of the cheek (buccal mucosa). Its mechanism involves forming intra-strand cross-links in DNA, which inhibits replication and triggers apoptosis. In clinical practice, Cisplatin is preferred because it acts as a potent **radiosensitizer**, making it the drug of choice for concurrent chemoradiotherapy (CRT) to improve local control and survival rates. **Analysis of Incorrect Options:** * **Vincristine (Option A):** A vinca alkaloid that inhibits microtubule formation. While used in pediatric solid tumors and lymphomas, it has minimal efficacy in head and neck epithelial cancers. * **Cyclophosphamide (Option B):** An alkylating agent primarily used in breast cancer, lymphomas, and leukemias. It is not a primary agent for oral cavity SCC. * **Daunorubicin (Option D):** An anthracycline used almost exclusively in hematological malignancies like Acute Myeloid Leukemia (AML). It has no role in the management of cheek carcinoma. **Clinical Pearls for NEET-PG:** * **Drug of Choice:** Cisplatin is the most effective single agent for head and neck SCC. * **Side Effects:** The dose-limiting toxicity of Cisplatin is **Nephrotoxicity** (prevented by aggressive pre- and post-treatment hydration/amifostine). It is also highly emetogenic and can cause ototoxicity. * **Alternative:** If a patient has renal impairment, **Carboplatin** is the preferred substitute. * **Targeted Therapy:** **Cetuximab** (an EGFR inhibitor) is another high-yield drug used in advanced head and neck cancers.

Q: What is the most common spinal tumor?

Neurofibroma. **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 1

What is the most common lymph node group involved in tuberculous lymphadenitis?

Accepted Answer

Posterior cervical

Answer

Axillary

Answer

Intraabdominal

Answer

Jugulodigastric

Question 2

A 45-year-old man presents with progressive cervical lymph node enlargement for the past 3 months. Which is the most diagnostic investigation?

Accepted Answer

Lymph node biopsy

Answer

X-ray of soft tissues

Answer

Fine Needle Aspiration Cytology (FNAC)

Answer

None of the above

Question 3

An edentulous 72-year-old man with a 50-year history of cigarette smoking presents with a nontender, hard mass in the lateral neck. What is the simplest way to establish an accurate histological diagnosis of a neck mass suspected to be cancerous?

Accepted Answer

Fine needle aspiration cytology

Answer

Bone marrow biopsy

Answer

Nasopharyngoscopy

Answer

CT scan of the head and neck

Question 4

A 4-year-old girl scheduled for tonsillectomy presents with a painless, mobile, cystic midline neck swelling measuring 2 x 1.1 x 1 cm, located just below the hyoid bone. Ultrasound revealed a thick-walled cystic lesion. What is the recommended management for this condition?

Accepted Answer

Surgical removal

Answer

Antibiotics

Answer

Percutaneous aspiration

Answer

Chest X-ray

Question 5

In patients with facial disproportion producing malocclusion, which of the following statements is true?

Accepted Answer

A sagittal split osteotomy commonly produces inferior dental nerve paraesthesia.

Answer

An osteotomy alone in the mandibular ramus can be used to close an anterior open bite.

Answer

An intraoral vertical subsigmoid osteotomy is appropriate for treating mandibular retrognathia.

Answer

Following a downfracture of the maxilla at Le Fort I level, the blood supply to the alveolus relies only on the integrity of the greater palatine artery.

Question 6

Radical neck dissection involves the removal of which of the following structures?

Accepted Answer

Spinal accessory nerve

Answer

External jugular vein

Answer

Tail of the parotid gland

Answer

All of the above

Question 7

What is the most common pathology seen in the scalp?

Accepted Answer

Sebaceous cyst

Answer

Dermoid

Answer

Hemangioma

Answer

Metastasis

Question 8

What is the preferred single-agent chemotherapy drug for carcinoma of the cheek?

Accepted Answer

Cisplatin

Answer

Vincristine

Answer

Cyclophosphamide

Answer

Daunorubicin

Question 9

What is the most common spinal tumor?

Accepted Answer

Neurofibroma

Answer

Neuroblastomas

Answer

Ependymoma

Answer

Meningioma

Question 10

What is the primary goal of a visor osteotomy?

Accepted Answer

To increase the height of the mandibular ridge for denture support.

Answer

To reduce bony undercuts on both sides if present bilaterally.

Answer

To reduce bony spicules present on the ridge that hinder denture placement.

Answer

All of the above.

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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