Head and Neck Surgery Practice Questions

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).

Q: 'Rubber band' extraction is a method of extraction in patients having which of the following conditions?

Bleeding disorders. **Explanation:** The **'Rubber band' extraction** (also known as elastic band extraction) is a specialized technique used in patients with severe **bleeding disorders**, such as Hemophilia or Von Willebrand disease. **Why it is the correct answer:** In patients with coagulopathies, conventional surgical extraction involving forceps and elevators carries a high risk of uncontrollable post-operative hemorrhage. The rubber band technique is a **non-invasive, slow exfoliation method**. A small orthodontic elastic band is placed around the neck of the tooth. Due to the tapering shape of the root, the elastic band migrates apically along the periodontal ligament space. This causes pressure necrosis of the periodontal fibers and gradual bone resorption, leading to the tooth's eventual exfoliation without significant trauma or bleeding. **Analysis of Incorrect Options:** * **B. Myocardial infarction and angina pectoris:** These patients require stress reduction, local anesthesia with limited epinephrine, or postponement of elective procedures. They do not require slow exfoliation techniques. * **C & D. Supernumerary and Impacted teeth:** These conditions involve teeth that are often malpositioned or completely encased in bone. Rubber band extraction is ineffective here as the band cannot be placed around the neck of the tooth, and surgical removal is the standard of care. **High-Yield Clinical Pearls for NEET-PG:** * **Indication:** Primarily used for Hemophiliacs to avoid the need for expensive factor replacement therapy. * **Duration:** The process typically takes **7 to 10 days** for the tooth to exfoliate. * **Caution:** This technique is contraindicated in patients with poor periodontal health or those at risk of infective endocarditis due to the prolonged presence of a foreign body and potential for local infection.

Q: What is the treatment of choice for fibrous dysplasia of the mandible in a 7-year-old girl?

Wait and watch. **Explanation:** **Fibrous Dysplasia (FD)** is a benign fibro-osseous lesion where normal bone is replaced by weak, fibrous connective tissue. In the pediatric population, particularly when involving the mandible, the management strategy is primarily conservative. **1. Why "Wait and Watch" is correct:** In a 7-year-old child, the facial skeleton is still actively growing. Fibrous dysplasia often follows a self-limiting course, frequently stabilizing or even regressing after puberty when skeletal maturity is reached. Surgical intervention in a growing child is avoided because: * It can interfere with growth centers, leading to secondary facial deformities. * The margins of FD are poorly defined, making complete resection difficult. * Conservative management (observation) is preferred unless there is significant functional impairment (breathing/swallowing) or severe progressive deformity. **2. Why other options are incorrect:** * **Symmetrical resection/Hemi-mandibulectomy:** These are overly aggressive and mutilating procedures for a benign, often self-limiting condition in a child. Radical surgery is reserved only for rare, rapidly expanding lesions that cause functional loss. * **Local irradiation:** This is **strictly contraindicated**. Radiation therapy for fibrous dysplasia carries a high risk of inducing malignant transformation into **Osteosarcoma** or Fibrosarcoma. **Clinical Pearls for NEET-PG:** * **Radiological Hallmark:** "Ground-glass" opacification with ill-defined borders (blending into normal bone). * **McCune-Albright Syndrome:** Triad of Polyostotic FD, Café-au-lait spots (Coast of Maine borders), and Precocious puberty. * **Monostotic vs. Polyostotic:** Monostotic (single bone) is the most common form (70-80%). * **Surgical Rule:** If surgery is required for aesthetics, it is ideally delayed until after puberty ("Surgical contouring").

Q: Which of the following retractors is used for retracting the lingual flap due to the close proximity of the lingual nerve to the mandibular third molar?

Howarth retractor. **Explanation:** The correct answer is **A. Howarth retractor**. **Why it is correct:** The extraction of an impacted mandibular third molar carries a significant risk of injury to the **lingual nerve**, which lies in close proximity to the lingual cortical plate. To protect this nerve, a subperiosteal dissection is performed, and a retractor is placed between the bone and the soft tissue flap. The **Howarth periosteal elevator/retractor** is the instrument of choice for this purpose. Its thin, curved blade allows it to be inserted gently between the lingual plate and the mucoperiosteum, effectively shielding the lingual nerve from the surgical drill or elevators during bone removal and tooth sectioning. **Why other options are incorrect:** * **B. Austin Retractor:** This is a small, right-angled retractor primarily used for retracting the **buccal flap** (cheek) or mucoperiosteal flaps in limited surgical fields. It is not designed for the delicate protection required on the lingual aspect. * **C. L Retractor (Langhenbeck):** These are generally used for retracting skin, fat, or muscle in general surgery or for retracting the cheek in oral surgery. They lack the specific contour and thin profile needed to safely retract the lingual flap without causing trauma. **Clinical Pearls for NEET-PG:** * **Lingual Nerve Anatomy:** It is located in the gingivolingual sulcus, often just 2-3mm below the alveolar crest in the third molar region. * **Howarth’s Dual Use:** It is a versatile instrument used both as a **periosteal elevator** (to reflect the flap) and as a **retractor** (to protect the flap). * **Ward’s Incision:** The standard incision for third molar surgery; the Howarth retractor is essential once the lingual aspect of this incision is reflected.

Question 1

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 2

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 3

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 4

What is the most common pathology seen in the scalp?

Accepted Answer

Sebaceous cyst

Answer

Dermoid

Answer

Hemangioma

Answer

Metastasis

Question 5

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

Accepted Answer

Cisplatin

Answer

Vincristine

Answer

Cyclophosphamide

Answer

Daunorubicin

Question 6

What is the most common spinal tumor?

Accepted Answer

Neurofibroma

Answer

Neuroblastomas

Answer

Ependymoma

Answer

Meningioma

Question 7

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.

Question 8

'Rubber band' extraction is a method of extraction in patients having which of the following conditions?

Accepted Answer

Bleeding disorders

Answer

Myocardial infarction and angina pectoris

Answer

Supernumerary teeth

Answer

Impacted teeth

Question 9

What is the treatment of choice for fibrous dysplasia of the mandible in a 7-year-old girl?

Accepted Answer

Wait and watch

Answer

Symmetrical resection of the mandible

Answer

Hemi mandibulectomy

Answer

Local irradiation

Question 10

Which of the following retractors is used for retracting the lingual flap due to the close proximity of the lingual nerve to the mandibular third molar?

Accepted Answer

Howarth retractor

Answer

Austin retractor

Answer

L retractor

Answer

Any of the above

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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