Head and Neck Surgery Practice Questions

Q: What is the most appropriate treatment for facial nerve injury in a lateral facial wound?

Primary repair. In facial trauma, the management of facial nerve injury depends on the timing and nature of the wound. **Why Primary Repair is Correct:** The facial nerve is a purely motor nerve (distal to the stylomastoid foramen), and its regeneration potential is excellent. **Primary repair (neurorrhaphy)**, performed within **72 hours** of injury, is the gold standard for clean-cut lateral facial wounds. At this stage, the distal ends of the nerve can still be identified using a nerve stimulator (Wallerian degeneration is not yet complete), and there is minimal scarring or retraction, allowing for a tension-free, end-to-end anastomosis. **Explanation of Incorrect Options:** * **Secondary Repair (A & C):** This is reserved for cases with significant tissue loss, heavy contamination, or when the patient is hemodynamically unstable. Delaying repair leads to proximal stump neuroma and distal stump fibrosis, making identification difficult and outcomes poorer. * **Secondary Repair with Grafting (C):** This is only indicated if a primary tension-free repair is impossible due to a large nerve gap (usually >1-2 cm). * **Healing with Secondary Intention (D):** This is never appropriate for a transected nerve, as it leads to permanent facial paralysis and muscle atrophy. **NEET-PG High-Yield Pearls:** * **The 72-Hour Rule:** Nerve stimulation of the distal stump is possible for up to 3 days post-injury. * **The Vertical Line Rule:** Injuries **medial** to a vertical line dropped from the lateral canthus of the eye often do not require surgical repair, as there is significant plexiform branching and spontaneous recovery is common. * **Suture Material:** Micro-neurosurgical repair is typically done using 9-0 or 10-0 monofilament (Nylon) sutures. * **Best Prognosis:** Primary end-to-end repair always yields better functional results than nerve grafting.

Q: Adamantinoma arises from which of the following?

Odontogenic tissue. **Explanation:** **Adamantinoma** (classically known as **Ameloblastoma**) is a slow-growing, locally invasive, but usually benign epithelial odontogenic tumor. **1. Why the correct answer is right:** Ameloblastomas arise from **odontogenic tissue**, specifically the remnants of the **dental lamina** (rests of Serres) or the **enamel organ** (rests of Malassez). These are the tissues responsible for tooth formation. Because it originates from these specialized cells, it is most commonly found in the mandible (80%), particularly in the molar-ramus region. **2. Analysis of incorrect options:** * **Dental lamina (Option A):** While the dental lamina is the specific precursor, "Odontogenic tissue" is the broader, more standard classification used in pathology for this tumor. In many exams, if both are present, the general tissue category (Odontogenic) is the preferred answer. * **Endothelium (Option B):** Endothelium gives rise to vascular tumors like hemangiomas or angiosarcomas, not epithelial tumors of the jaw. * **Basal oral mucosa (Option C):** While some theories suggest a peripheral origin from the oral epithelium, the primary and classic origin is the deeper odontogenic apparatus. **3. Clinical Pearls for NEET-PG:** * **Radiological Appearance:** Characteristically shows a **"Soap-bubble"** or **"Honey-comb"** appearance due to multilocular radiolucency. * **Clinical Feature:** It causes expansion of the jaw bone, leading to **"Egg-shell crackling"** on palpation. * **Management:** It is radioresistant. The treatment of choice is **wide local excision** with at least 1 cm of healthy bone margin to prevent high recurrence rates. * **Note on Extragnathic Adamantinoma:** A histologically similar but distinct tumor called "Adamantinoma of long bones" occurs most commonly in the **Tibia**, but this is not odontogenic in origin.

Q: A man presented with a slow-growing, asymptomatic, firm, non-tender, pulsatile mass in the region of the carotid bifurcation. Diagnosis was made as carotid body tumor by angiogram. Where does a carotid body tumor arise from?

Parasympathetic paraganglioma. **Explanation:** **Carotid Body Tumor (CBT)**, also known as a **chemodectoma**, is the most common head and neck paraganglioma. It arises from the **parasympathetic paraganglia** located at the bifurcation of the common carotid artery. These cells are derived from the **neural crest** and function as chemoreceptors sensitive to changes in arterial oxygen, carbon dioxide, and pH. * **Why Option C is correct:** Paragangliomas are classified based on their anatomical location and autonomic association. Head and neck paragangliomas (like carotid body, glomus jugulare, and glomus tympanicum) are almost exclusively **parasympathetic** in origin. Unlike sympathetic paraganglia, they are usually non-secretory (do not produce catecholamines). * **Why Option D is incorrect:** Sympathetic paragangliomas typically arise in the abdomen or thorax (e.g., Organ of Zuckerkandl) and are frequently associated with catecholamine secretion (hypertension, palpitations). * **Why Options A & B are incorrect:** While the tumor is located at the carotid bifurcation near the **carotid sinus** (a baroreceptor), it does not arise from the sinus tissue itself or the vessel wall of the **carotid artery**. It is a neuroendocrine tumor arising from the specialized cells *between* the vessels. **High-Yield Clinical Pearls for NEET-PG:** * **Fontaine’s Sign:** The mass is mobile horizontally but fixed vertically (due to its attachment to the carotid bifurcation). * **Lyre Sign:** On angiography, the tumor causes characteristic widening/splaying of the internal and external carotid arteries. * **Shamblin Classification:** Used to grade the tumor based on its degree of encirclement of the carotid vessels. * **Rule of 10s:** Approximately 10% are bilateral, 10% are malignant, and 10% are familial (associated with SDH gene mutations).

Q: Seabrooks operation is done for which condition?

Parotid gland pathologies. **Explanation:** **Seabrook’s operation** is a surgical technique used for the management of **parotid gland pathologies**, specifically for the treatment of a **parotid fistula**. A parotid fistula occurs when saliva leaks from the parotid gland or its duct (Stensen’s duct) onto the skin surface, usually following trauma or surgery. Seabrook’s procedure involves the **re-routing of the proximal end of the parotid duct into the oral cavity**, thereby converting an external fistula into an internal one. **Analysis of Incorrect Options:** * **Thyroglossal Cyst & Fistula (Options B & C):** The gold standard treatment for these conditions is the **Sistrunk operation**, which involves the excision of the cyst/fistula track along with the central portion of the hyoid bone to prevent recurrence. * **Branchial Fistula (Option D):** This is typically managed by a **stepladder incision** (two transverse incisions) to completely dissect the long tract extending from the skin to the oropharynx (usually the second branchial arch remnant). **High-Yield Clinical Pearls for NEET-PG:** * **Frey’s Syndrome:** A common complication after parotid surgery (injury to the auriculotemporal nerve) characterized by gustatory sweating. It is diagnosed by the **Minor’s Starch-Iodine test**. * **Modified Blair’s Incision:** The standard surgical approach used for a superficial or total parotidectomy. * **Stensen’s Duct:** Opens into the oral cavity opposite the crown of the **upper second molar tooth**. * **Sistrunk Operation:** High-yield for its association with the **hyoid bone** removal.

Q: According to Sawhney's classification of TMJ ankylosis, which type is characterized by complete destruction of joint architecture by osseous union with no identifiable sigmoid notch?

Type 4. ### Explanation **Sawhney’s Classification** is the most widely used system to categorize the severity of Temporomandibular Joint (TMJ) ankylosis based on radiological and clinical findings. **Correct Option: D (Type 4)** In **Type 4 ankylosis**, there is complete destruction of the joint architecture. The condyle, notch, and coronoid process are replaced by a massive, solid block of bone (synostosis) extending from the ramus to the zygomatic arch. The **sigmoid notch is completely obliterated**, making this the most severe form. **Analysis of Incorrect Options:** * **Type 1 (Option A):** Characterized by minimal bone formation. There is a flattening or deformity of the condyle with fibrous adhesions, but the joint space is still visible. * **Type 2 (Option B):** Features more extensive bony fusion, typically involving the outer surface of the joint. However, the **medial part of the joint remains relatively unaffected**, and the anatomy of the condyle is still somewhat recognizable. * **Type 3 (Option C):** There is a bony bridge (ankylotic mass) connecting the ramus to the zygomatic arch. Crucially, the **sigmoid notch is still identifiable**, and a small portion of the original condylar head may be seen medially. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause:** Trauma (specifically undiagnosed/untreated condylar fractures) is the leading cause of TMJ ankylosis, followed by infections (Otitis media). * **Clinical Presentation:** Progressive limitation of mouth opening (trismus), facial asymmetry (if unilateral), and "bird-face" deformity (micrognathia) if bilateral and occurring during growth. * **Treatment Gold Standard:** Gap arthroplasty or Interpositional arthroplasty (using temporalis fascia or cartilage) to prevent re-ankylosis. * **Radiology:** The "Panorex" (OPG) and CT scans are the imaging modalities of choice to differentiate between Sawhney types.

Question 1

What is the most appropriate treatment for facial nerve injury in a lateral facial wound?

Accepted Answer

Primary repair

Answer

Secondary repair

Answer

Secondary repair with grafting

Answer

Healing with secondary intention

Question 2

A 40-year-old female presented with a progressively increasing lump in the parotid region. On oral examination, the tonsil was pushed medially. Biopsy showed it to be pleomorphic adenoma. What is the appropriate treatment?

Accepted Answer

Conservative total parotidectomy

Answer

Superficial parotidectomy

Answer

Lumpectomy

Answer

Enucleation

Question 3

Adamantinoma arises from which of the following?

Accepted Answer

Odontogenic tissue

Answer

Dental lamina

Answer

Endothelium

Answer

Basal oral mucosa

Question 4

A man presented with a slow-growing, asymptomatic, firm, non-tender, pulsatile mass in the region of the carotid bifurcation. Diagnosis was made as carotid body tumor by angiogram. Where does a carotid body tumor arise from?

Accepted Answer

Parasympathetic paraganglioma

Answer

Carotid sinus

Answer

Carotid artery

Answer

Sympathetic paraganglioma

Question 5

A 32-year-old female, with a history of chronic tobacco chewing since 14 years of age, presents with difficulty in opening her mouth. On oral examination, no ulcers are seen. What is the most probable diagnosis?

Accepted Answer

Submucous oral fibrosis

Answer

Carcinoma of the tongue

Answer

Trigeminal nerve paralysis

Answer

Carcinoma of the buccal mucosa

Question 6

Seabrooks operation is done for which condition?

Accepted Answer

Parotid gland pathologies

Answer

Thyroglossal fistula

Answer

Thyroglossal cyst

Answer

Branchial fistula

Question 7

According to Sawhney's classification of TMJ ankylosis, which type is characterized by complete destruction of joint architecture by osseous union with no identifiable sigmoid notch?

Accepted Answer

Type 4

Answer

Type 1

Answer

Type 2

Answer

Type 3

Question 8

A 43-year-old teacher underwent left parotidectomy. Upon awakening from surgery, paralysis of the left lower lip was observed. This complication was most likely due to injury to which of the following?

Accepted Answer

Facial nerve cervical branch

Answer

Parotid duct

Answer

Facial nerve temporal branch

Answer

Facial nerve main trunk

Question 9

Which of the following is FALSE about a thyroglossal fistula?

Accepted Answer

It is a congenital remnant of the thyroglossal tract, typically presenting in the midline of the neck.

Answer

It often presents as a discharging sinus that is prone to recurrent infections.

Answer

Treatment involves the excision of the fistula and the entire thyroglossal tract up to the base of the tongue.

Answer

Surgical excision typically requires the removal of the middle third of the hyoid bone.

Question 10

A 65-year-old tobacco chewer presents with sublingual cancer involving the mandible. Commando surgery has been planned. Which of the following structures is NOT removed during a commando operation?

Accepted Answer

Accessory nerve

Answer

Involved mandible

Answer

Oral cancer

Answer

Neck lymph nodes

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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