Head and Neck Surgery Practice Questions

Q: Which of the following is FALSE regarding the management of salivary gland tumors?

Chemotherapy is given after surgery.. ### Explanation **1. Why Option B is False (The Correct Answer):** In salivary gland tumors, **surgery** is the primary treatment, often followed by **radiotherapy** for high-grade or recurrent cases. Salivary gland malignancies are generally **radioresistant and chemoresistant**. Chemotherapy is not a routine postoperative protocol; it is reserved only for palliative care in advanced, metastatic, or symptomatic recurrent disease where surgery and radiation are no longer options. **2. Analysis of Other Options:** * **Option A (FNAC):** FNAC is indeed the **investigation of choice** for initial evaluation. It has high sensitivity and specificity (approx. 90%) for distinguishing between benign and malignant lesions, helping in surgical planning without the risk of seeding. * **Option C (Open Incisional Biopsy):** This is strictly **contraindicated**, especially in the parotid gland. Breaking the tumor capsule increases the risk of **tumor seeding** (leading to recurrence) and potential damage to the facial nerve. * **Option D (Neck Dissection):** For high-grade malignancies (e.g., Mucoepidermoid carcinoma or Squamous cell carcinoma), the risk of occult nodal metastasis is high. Therefore, a **prophylactic or therapeutic neck dissection** is mandatory to ensure regional oncological control. ### High-Yield Clinical Pearls for NEET-PG: * **Most common tumor:** Pleomorphic Adenoma (Parotid). * **Most common malignancy:** Mucoepidermoid Carcinoma. * **Adenoid Cystic Carcinoma:** Characterized by **perineural invasion** and a "Swiss-cheese" appearance on histology. * **Warthin’s Tumor:** Often bilateral, associated with smoking, and shows "hot spots" on Technetium-99m pertechnetate scan. * **Frey’s Syndrome:** A post-parotidectomy complication diagnosed by the **Minor’s Starch-Iodine test**.

Q: Painful lockjaw is seen in which of the following conditions EXCEPT?

Tetany. **Explanation:** The question asks for the condition where **painful lockjaw (trismus)** is *not* typically seen. **1. Why Tetany is the Correct Answer:** In **Tetany** (caused by hypocalcemia), the characteristic clinical feature is **painless** carpopedal spasm. While it involves increased neuromuscular excitability and can cause facial muscle twitching (Chvostek's sign), it does not typically present with the inflammatory "lockjaw" seen in the other options. In contrast, **Tetanus** (caused by *Clostridium tetani*) presents with a classic, painful lockjaw (risus sardonicus) due to spastic paralysis. This distinction between Tetany (painless) and Tetanus (painful) is a common point of confusion in exams. **2. Analysis of Incorrect Options:** * **Temporomandibular joint (TMJ) abscess:** Any inflammatory process or infection involving the TMJ leads to severe pain and protective muscle guarding, resulting in trismus. * **Mandibular abscess:** Infections of the mandible or surrounding soft tissues (like submandibular space infections) cause significant pain and mechanical restriction of jaw movement. * **Odontogenic pulp abscess:** Severe dental infections can lead to periapical abscesses or cellulitis. When the infection spreads to the masticatory spaces (e.g., masseteric space), it triggers painful trismus. **3. High-Yield Clinical Pearls for NEET-PG:** * **Trismus (Lockjaw):** Most commonly caused by peritonsillar abscess (Quinsy), impacted third molars, or Tetanus. * **Tetanus vs. Tetany:** Tetanus = Painful spasms, Risus Sardonicus, Opisthotonus. Tetany = Painless spasms, Trousseau’s sign, Chvostek’s sign. * **Strychnine Poisoning:** Often mimics Tetanus but is characterized by rapid onset and complete muscle relaxation between convulsions (unlike Tetanus).

Q: All the following statements are true regarding malignant salivary gland tumors EXCEPT?

Simple enucleation is treatment of choice. **Explanation:** The management of salivary gland tumors depends heavily on their biological behavior. Malignant tumors are characterized by local invasion, rapid growth, and potential for metastasis. **Why Option D is the Correct Answer (The Exception):** Simple enucleation is **never** the treatment of choice for malignant salivary gland tumors. Enucleation (shelling out the tumor) carries a high risk of tumor spillage and incomplete resection, leading to inevitable local recurrence. The standard of care for malignancy is **wide local excision** (e.g., superficial or total parotidectomy) with clear margins, often combined with neck dissection if nodes are involved. Even for benign tumors like Pleomorphic Adenoma, enucleation is avoided to prevent recurrence. **Why the other options are characteristic of Malignancy:** * **Option A (Pain):** While most salivary tumors are painless, the presence of pain often indicates perineural invasion or rapid expansion, which are hallmarks of malignancy (especially Adenoid Cystic Carcinoma). * **Option B (Skin Ulceration):** Malignant tumors are invasive. Ulceration of the overlying skin or fixity to deeper structures indicates advanced local infiltration (T4 disease). * **Option C (Cervical Lymphadenopathy):** Unlike benign tumors, malignant salivary tumors (particularly Mucoepidermoid and Squamous Cell Carcinomas) frequently metastasize to regional cervical lymph nodes. **High-Yield Clinical Pearls for NEET-PG:** * **Most common malignant tumor (Parotid/Minor Salivary):** Mucoepidermoid Carcinoma. * **Tumor with highest propensity for perineural invasion:** Adenoid Cystic Carcinoma (presents with "skip lesions"). * **Rule of 80s (Parotid):** 80% are in the parotid, 80% are benign, 80% are Pleomorphic Adenoma. * **Clinical Suspicion:** Any salivary gland mass associated with **Facial Nerve Palsy** is considered malignant until proven otherwise.

Q: A cystic, painless swelling along the upper border of the sternocleidomastoid muscle is most likely to be:

Branchial cyst. **Explanation:** The correct answer is **Branchial cyst**. This diagnosis is based on the classic anatomical location and clinical presentation. **1. Why Branchial Cyst is Correct:** A branchial cyst (specifically from the **second branchial cleft**, which accounts for 95% of cases) typically presents in young adults as a smooth, painless, fluctuant swelling. Its hallmark location is at the **junction of the upper one-third and middle one-third of the sternocleidomastoid (SCM) muscle**, along its anterior border. It is often lined by squamous epithelium and contains "glairy" fluid rich in **cholesterol crystals**. **2. Why Other Options are Incorrect:** * **Thyroglossal cyst:** These are typically **midline** swellings (near the hyoid bone) that characteristically **move upward on protrusion of the tongue** and deglutition. * **Cystic hygroma:** This is a congenital lymphatic malformation usually seen in infants. It most commonly occurs in the **posterior triangle** of the neck, is brilliantly **transilluminant**, and has poorly defined margins (unlike the well-defined branchial cyst). * **Branchial fistula:** While related to branchial apparatus defects, a fistula is a tract with an external opening (usually at the lower third of the SCM) that discharges mucus; it is not a discrete cystic swelling. **Clinical Pearls for NEET-PG:** * **Most common site:** Second branchial cleft (95%). * **Pathognomonic finding:** Presence of cholesterol crystals in the aspirated fluid. * **Differential Diagnosis:** Always rule out a "Cold Abscess" (tuberculous lymphadenitis) or metastatic squamous cell carcinoma in older patients presenting with a similar mass. * **Treatment:** Complete surgical excision (Sistrunk procedure is for thyroglossal cysts, not branchial cysts).

Q: In the mandibular symphysis region, which additional forces are present that are not usually seen in the body, ramus, or condylar regions?

Torsion. **Explanation:** The mandibular symphysis is the midline junction of the two halves of the mandible. Unlike the body or ramus, which primarily experience linear bending forces, the symphysis is subjected to unique biomechanical stresses due to the "U-shaped" geometry of the mandible. **Why Torsion is Correct:** When the mouth opens or during unilateral loading (chewing on one side), the lateral pterygoid muscles pull the condyles medially. This causes the lower borders of the mandibular rami to flare outward while the superior borders move inward. This twisting motion around the long axis of the mandibular body meets at the midline, resulting in **torsional (twisting) forces** at the symphysis. This is why symphyseal fractures often require two points of fixation (e.g., two miniplates) to counteract these rotational forces. **Analysis of Incorrect Options:** * **A. Tension:** Tension occurs at the superior border (alveolar margin) of the mandible during function. It is common to all regions of the mandible. * **B. Compression:** Compression occurs at the inferior border of the mandible during loading. Like tension, it is a standard force found throughout the mandibular body. * **C. Shearing:** While shearing forces can occur during trauma, they are not the characteristic functional biomechanical force unique to the symphysis compared to other regions. **High-Yield NEET-PG Pearls:** * **Champy’s Lines of Osteosynthesis:** These are the ideal lines for plate placement to counteract tension. In the symphysis, two plates are needed to neutralize **torsion**. * **Tension vs. Compression:** In the mandible, the superior border is the tension zone, and the inferior border is the compression zone. * **Stress Distribution:** The symphysis is the thickest part of the mandible (mentum), yet it is a common site for fractures due to its prominent position and the concentration of torsional stress.

Q: All of the following features about ranula are true EXCEPT?

Mucous extravasation cyst of a minor salivary gland. ### Explanation **1. Why Option A is the Correct Answer (The "Except" Statement):** A **Ranula** is a mucous extravasation cyst that specifically arises from the **sublingual gland** (a major salivary gland), not a minor salivary gland. While minor salivary glands can cause *mucoceles* (commonly on the lower lip), a ranula is clinically defined by its location in the floor of the mouth, typically resulting from trauma or obstruction of the **Ducts of Rivinus** or the **Bartholin duct** of the sublingual gland. **2. Analysis of Other Options:** * **Option B (May resolve spontaneously):** Small, superficial ranulas can occasionally rupture and resolve on their own, although recurrence is common. * **Option C (Surgical excision is preferred):** The definitive treatment for a ranula is the **surgical excision of the sublingual gland** along with the cyst. Simple cystectomy alone has a high failure rate because the source of the mucus (the gland) remains. * **Option D (I&D results in recurrence):** Simple incision and drainage (I&D) or aspiration provides only temporary relief. The secretory pressure of the sublingual gland almost always causes the cyst to refill, leading to a near 100% recurrence rate. **3. Clinical Pearls for NEET-PG:** * **Plunging Ranula:** A clinical variant where the mucus extravasates through or around the **mylohyoid muscle** into the submandibular space, presenting as a neck swelling. * **Appearance:** Classically described as a "blue, translucent, frog-belly-like" swelling in the floor of the mouth. * **Treatment of Choice:** Excision of the sublingual gland (via intraoral approach for simple ranula; may require a combined approach for plunging ranula). **Marsupialization** is an alternative but has a higher recurrence rate than gland excision.

Q: What is a potential complication of using an airotor at 30,000 rpm for an impacted molar?

Emphysema. **Explanation:** The correct answer is **Emphysema (D)**. **Why it is correct:** An airotor is a high-speed, air-driven drill. When used for surgical procedures like extracting an impacted molar, the high-pressure air used to drive the turbine can escape into the surrounding soft tissue planes. If the air enters the fascial spaces (such as the submandibular, parapharyngeal, or retropharyngeal spaces), it results in **Surgical Emphysema**. Clinically, this presents as sudden swelling and characteristic **crepitus** (a crackling sensation) on palpation. In severe cases, this air can track down into the mediastinum, leading to life-threatening pneumomediastinum. **Why the other options are incorrect:** * **A & C (Necrosis of bone/tissue):** While high-speed drilling generates significant heat that *could* cause thermal necrosis, modern airotors use water-cooling systems to prevent this. Necrosis is a chronic or delayed complication, whereas emphysema is a specific, acute risk associated with the air-pressure mechanism of the drill. * **B (Tissue laceration):** While a slip of the bur can cause a laceration, this is a mechanical error rather than a specific complication of the 30,000 rpm air-driven mechanism itself. **NEET-PG High-Yield Pearls:** * **Prevention:** To avoid emphysema, surgeons prefer using **physiodispensers** (electric motors) rather than air-driven motors for bone guttering. * **Diagnosis:** The hallmark sign of surgical emphysema is **crepitus**. * **Management:** Most cases are mild and managed conservatively with antibiotics (to prevent secondary infection from oral flora) and observation. However, always monitor for respiratory distress. * **Radiology:** On X-ray, it appears as radiolucent streaks of air within soft tissue shadows.

Q: A 20-year-old female presents with a cystic swelling in the neck. The swelling moves superiorly when the tongue is protruded. What is the most likely diagnosis?

Thyroglossal duct cyst. **Explanation:** The clinical hallmark of a **Thyroglossal Duct Cyst (TGDC)** is a midline neck swelling that moves upward both on **deglutition (swallowing)** and on **protrusion of the tongue**. This occurs because the cyst is a remnant of the thyroglossal duct, which is embryologically connected to the foramen caecum at the base of the tongue. The duct usually passes through or is closely related to the hyoid bone; when the tongue is protruded, the genioglossus muscle pulls the hyoid bone and the attached duct upward, causing the cyst to rise. **Analysis of Incorrect Options:** * **Thyroid Swelling:** While thyroid swellings move with **deglutition** (due to their attachment to the pretracheal fascia), they **do not move with tongue protrusion** as they lack a direct anatomical connection to the base of the tongue. * **Sublingual Gland Swelling:** These are typically located in the floor of the mouth (sublingual space) and do not demonstrate movement related to the hyoid bone or tongue protrusion in the neck. * **Plunging Ranula:** This is a mucous extravasation cyst from the sublingual gland that herniates through the mylohyoid muscle into the submandibular space. It presents as a soft, fluctuant lateral neck swelling and does not move with tongue protrusion. **High-Yield Clinical Pearls for NEET-PG:** * **Sistrunk Operation:** The definitive surgical treatment for TGDC. It involves excision of the cyst, the entire tract, and the **central part of the hyoid bone** to prevent recurrence. * **Location:** Most common site is **infrahyoid** (80%), followed by the level of the hyoid bone. * **Ectopic Thyroid:** Always perform an ultrasound to confirm the presence of a normal thyroid gland before surgery, as the TGDC may contain the patient's only functioning thyroid tissue. * **Carcinoma:** The most common malignancy arising in a TGDC is **Papillary Thyroid Carcinoma**.

Q: Oral melanomas are much more aggressive than cutaneous melanomas. At what stage is the diagnosis typically made?

Stage 3. **Explanation:** **1. Why Stage 3 is Correct:** Oral mucosal melanoma is a rare but highly aggressive neoplasm. Unlike cutaneous melanoma, which uses the TNM staging system starting from Stage 0/I, the **AJCC (American Joint Committee on Cancer) staging for mucosal melanoma of the head and neck begins at Stage III.** Because mucosal melanomas are inherently aggressive and associated with a poor prognosis regardless of tumor thickness, there are no Stage I or II classifications. Even a localized tumor with no nodal involvement (T3 N0 M0) is automatically classified as **Stage III**. This reflects the biological "head start" these tumors have compared to their cutaneous counterparts. **2. Why Other Options are Incorrect:** * **Stage 2 (Option A):** This stage does not exist in the AJCC staging system for mucosal melanomas. All localized diseases are "upstaged" to Stage III. * **Stage 4 (Option B):** Stage IV is reserved for advanced disease involving regional lymph node metastasis (Stage IVA/B) or distant metastasis (Stage IVC). While many patients are diagnosed late, Stage III is the earliest possible clinical stage at diagnosis. * **Stage 5 (Option D):** There is no Stage 5 in the AJCC TNM staging system for any melanoma. **3. Clinical Pearls for NEET-PG:** * **Most Common Site:** The hard palate and maxillary gingiva are the most frequent sites for oral melanoma. * **ABCDE Rule:** Often does not apply well to oral lesions; look for the "BANS" area (Back, Arm, Neck, Scalp) in cutaneous cases, but in the mouth, look for **pigmented patches with irregular borders.** * **Prognosis:** Much worse than cutaneous melanoma (5-year survival is only 10–25%). * **Staging Rule:** Remember: **Mucosal Melanoma = No Stage I or II.** It starts at III.

Question 1

Which of the following is FALSE regarding the management of salivary gland tumors?

Accepted Answer

Chemotherapy is given after surgery.

Answer

Fine Needle Aspiration Cytology (FNAC) is the investigation of choice.

Answer

Open incisional biopsy is a contraindication.

Answer

Neck dissection is mandatory for high-grade malignancies.

Question 2

Painful lockjaw is seen in which of the following conditions EXCEPT?

Accepted Answer

Tetany

Answer

Temporomandibular joint abscess

Answer

Mandibular abscess

Answer

Odontogenic pulp abscess

Question 3

All the following statements are true regarding malignant salivary gland tumors EXCEPT?

Accepted Answer

Simple enucleation is treatment of choice

Answer

Painful

Answer

Present with skin ulceration

Answer

Cervical lymphadenopathy present

Question 4

A cystic, painless swelling along the upper border of the sternocleidomastoid muscle is most likely to be:

Accepted Answer

Branchial cyst

Answer

Thyroglossal cyst

Answer

Cystic hygroma

Answer

Branchial fistula

Question 5

In the mandibular symphysis region, which additional forces are present that are not usually seen in the body, ramus, or condylar regions?

Accepted Answer

Torsion

Answer

Tension

Answer

Compression

Answer

Shearing

Question 6

All of the following features about ranula are true EXCEPT?

Accepted Answer

Mucous extravasation cyst of a minor salivary gland

Answer

May resolve spontaneously

Answer

Surgical excision of the cyst is the preferred treatment

Answer

Incision and drainage usually results in recurrence

Question 7

What is the treatment of choice for a patient with a maxillary complete denture experiencing severe bilateral tuberosity undercuts?

Accepted Answer

Remove the tissue on only one side if possible

Answer

Remove both tuberosity undercuts

Answer

Maintain the undercuts as they help in retention

Answer

Use a mucostatic impression material

Question 8

What is a potential complication of using an airotor at 30,000 rpm for an impacted molar?

Accepted Answer

Emphysema

Answer

Necrosis of bone

Answer

Tissue laceration

Answer

Tissue necrosis

Question 9

A 20-year-old female presents with a cystic swelling in the neck. The swelling moves superiorly when the tongue is protruded. What is the most likely diagnosis?

Accepted Answer

Thyroglossal duct cyst

Answer

Thyroid swelling

Answer

Sublingual gland swelling

Answer

Plunging ranula

Question 10

Oral melanomas are much more aggressive than cutaneous melanomas. At what stage is the diagnosis typically made?

Accepted Answer

Stage 3

Answer

Stage 2

Answer

Stage 4

Answer

Stage 5

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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