Head and Neck Surgery Practice Questions

Q: Which ganglion needs to be avoided during cervical sympathectomy to prevent Horner syndrome?

T1. **Explanation:** The sympathetic supply to the eye and face follows a three-neuron pathway. The preganglionic sympathetic fibers for the eye originate from the **Ciliospinal Center of Budge (C8–T2)**. These fibers exit the spinal cord primarily via the **T1 nerve root** and ascend through the sympathetic chain to synapse in the Superior Cervical Ganglion. In many individuals, the inferior cervical ganglion fuses with the first thoracic ganglion (T1) to form the **Stellate Ganglion**. Damage to the T1 component or the stellate ganglion interrupts the sympathetic supply to the head and neck, resulting in **Horner Syndrome** (characterized by miosis, partial ptosis, anhidrosis, and enophthalmos). Therefore, during a cervical sympathectomy (often performed for palmar hyperhidrosis), the T1 ganglion must be strictly preserved. **Analysis of Options:** * **A. T1 (Correct):** It contains the essential preganglionic fibers destined for the eye. Its preservation is the "gold standard" rule to avoid postoperative Horner syndrome. * **B, C, and D (T2, T3, T4):** These ganglia provide sympathetic innervation to the upper limbs (axilla and palms). In modern video-assisted thoracoscopic surgery (VATS) for hyperhidrosis, surgeons typically target T2 to T4. Resecting these does not cause Horner syndrome because the ocular sympathetic fibers have already exited or are situated higher in the chain. **High-Yield Clinical Pearls for NEET-PG:** * **Stellate Ganglion:** Formed by the fusion of the Inferior Cervical and T1 ganglia; located at the level of the neck of the 1st rib. * **Surgical Landmark:** To avoid Horner syndrome, dissection should stay **below the level of the second rib**. * **Harlequin Sign:** A rare complication of sympathectomy where one side of the face fails to flush or sweat, often seen alongside Horner syndrome.

Q: Which of the following is not done in the treatment of ankylosis?

High condylar shave. **Explanation:** The primary objective in treating **Temporomandibular Joint (TMJ) ankylosis** is to create a functional gap and prevent re-fusion. The standard surgical protocol is **Gap Arthroplasty** or **Interpositional Arthroplasty**. **Why "High Condylar Shave" is the correct answer:** A high condylar shave (or high condylectomy) involves removing only the superior portion of the condylar head. This procedure is indicated for **Condylar Hyperplasia** or early-stage internal derangement, not ankylosis. In ankylosis, there is a dense bony or fibrous mass obliterating the joint space; a mere "shave" is insufficient to release the fusion and would lead to immediate recurrence. Instead, a radical excision of the ankylotic mass (at least 1–1.5 cm gap) is required. **Analysis of other options:** * **Repositioning of temporal fascia:** This is a form of **Interpositional Arthroplasty**. Placing a barrier (like the temporalis muscle/fascia) between the osteotomy sites is crucial to prevent re-ankylosis. * **Ipsilateral coronoidectomy:** Often, the coronoid process becomes elongated or tethered in chronic ankylosis. Removing it on the affected side is a standard step to achieve an intraoperative mouth opening of >35mm. * **Contralateral coronoidectomy:** If the mouth opening remains inadequate after ipsilateral surgery, the contralateral coronoid process must be removed, as it may be preventing the mandible from dropping due to chronic disuse atrophy and fibrosis. **NEET-PG High-Yield Pearls:** * **Kaban’s Protocol:** The gold standard surgical sequence for TMJ ankylosis. * **Most common cause:** Trauma (especially undiagnosed condylar fractures) is the #1 cause worldwide; infections are the #2 cause. * **Sawhney’s Classification:** Used to grade the severity of TMJ ankylosis (Type I to IV). * **Post-op care:** Aggressive physiotherapy is the most critical factor in preventing relapse.

Q: What is the most common organism that causes the following condition?

Beta-hemolytic streptococci. ***Beta-hemolytic streptococci*** - **Group A Streptococcus (S. pyogenes)** is the most common causative organism for **peritonsillar abscess**, accounting for the majority of cases. - These organisms have high **virulence** and produce enzymes like **streptokinase** and **hyaluronidase** that facilitate tissue invasion and abscess formation. *Polymicrobial* - While some peritonsillar abscesses can be **polymicrobial**, the majority are caused by a **single predominant organism**. - **Mixed infections** are more common in chronic or recurrent cases, not in typical acute presentations. *Clostridium perfringens* - This is an **anaerobic gram-positive rod** that primarily causes **gas gangrene** and **necrotizing fasciitis**. - It is **not associated** with peritonsillar abscess formation and typically affects deeper soft tissues. *Clostridium tetani* - This organism causes **tetanus** through **tetanospasmin toxin** production, leading to **muscle spasms** and **lockjaw**. - It does **not cause abscesses** but rather a systemic toxin-mediated disease following wound contamination.

Q: Sistrunk operation is the preferred treatment for which of the following conditions?

Thyroglossal cyst. **Explanation:** The **Sistrunk operation** is the gold-standard surgical procedure for a **Thyroglossal cyst**. The underlying medical concept is based on the embryological descent of the thyroid gland. The thyroglossal duct extends from the *foramen caecum* at the base of the tongue to the thyroid's final position. Crucially, this duct is intimately associated with the **hyoid bone**, often passing through or just behind it. To prevent the high rate of recurrence (approx. 50% with simple excision), the Sistrunk procedure involves: 1. Excision of the cyst. 2. Removal of the **central portion of the hyoid bone**. 3. Excision of a core of muscle/tissue up to the foramen caecum. **Analysis of Incorrect Options:** * **A & B (Retrosternal and Endemic Goiter):** These are thyroid parenchymal diseases. Treatment usually involves medical management or various forms of thyroidectomy (e.g., Total or Subtotal Thyroidectomy), not Sistrunk’s. * **D (Adrenal Incidentaloma):** This is an asymptomatic adrenal mass found on imaging. Management depends on size and functional status, typically involving observation or laparoscopic adrenalectomy. **Clinical Pearls for NEET-PG:** * **Most common site:** Subhyoid (infrahyoid). * **Clinical sign:** The cyst moves upward on **protrusion of the tongue** (due to attachment to the foramen caecum) and on deglutition. * **Complication:** The most common malignancy arising in a thyroglossal cyst is **Papillary Thyroid Carcinoma**. * **Pre-op must-do:** Always perform an ultrasound to ensure a normal thyroid gland is present in the neck; the cyst may contain the only functioning thyroid tissue (ectopic thyroid).

Q: What is the standard treatment for verrucous carcinoma of the lip?

Surgical excision. **Explanation:** Verrucous carcinoma (Ackerman’s tumor) is a distinct, well-differentiated variant of squamous cell carcinoma characterized by a slow-growing, "wart-like" exophytic appearance. **Why Surgical Excision is the Correct Answer:** The gold standard treatment is **wide local surgical excision**. Verrucous carcinoma is locally aggressive but rarely metastasizes to regional lymph nodes. Therefore, complete surgical removal with clear margins is usually curative. Unlike typical squamous cell carcinoma, routine neck dissection is not indicated unless there is clinical evidence of lymphadenopathy or a hybrid tumor component. **Analysis of Incorrect Options:** * **A. Surgery and Radiotherapy:** Radiotherapy is generally **contraindicated** as a primary or adjuvant treatment. Exposure to radiation can trigger "anaplastic transformation," turning a low-grade verrucous lesion into a highly aggressive, rapidly metastasizing spindle cell carcinoma. * **C. Laser Therapy:** While used for some superficial premalignant lesions, laser therapy is inadequate for verrucous carcinoma because it does not allow for precise margin assessment and may lead to incomplete removal of the deep "pushing" borders. * **D. Interferon:** Medical therapies like interferon or chemotherapy are not primary treatment modalities for localized verrucous carcinoma, which is primarily a surgical disease. **Clinical Pearls for NEET-PG:** * **Histology:** Characterized by a "pushing" rather than an "infiltrating" margin and minimal cellular atypia. * **Common Sites:** Most common in the oral cavity (buccal mucosa) and associated with smokeless tobacco (Snuff dipper’s cancer). * **Key Contraindication:** Avoid Radiotherapy due to the risk of **anaplastic transformation**. * **Prognosis:** Excellent if completely excised, as distant metastasis is extremely rare.

Q: Excessive blood loss during mandibulectomy can be prevented by all of the following except?

Adrenaline infiltration. **Explanation:** The correct answer is **C. Adrenaline infiltration**. In major head and neck surgeries like mandibulectomy, the primary source of bleeding is from large-caliber vessels, specifically the **Inferior Alveolar Artery** (a branch of the maxillary artery) and the **Facial Artery**. **Why Adrenaline Infiltration is the "Except" option:** While adrenaline (epinephrine) causes vasoconstriction of small capillaries and is excellent for controlling "ooze" in skin incisions or mucosal flaps, it is **ineffective** for controlling bleeding from major arteries encountered during a mandibulectomy. Furthermore, excessive adrenaline infiltration in the head and neck region can lead to systemic cardiovascular side effects (tachycardia, hypertension) without providing the definitive hemostasis required for large-vessel ligation. **Analysis of other options:** * **Pressure and Packing (A):** This is a standard initial maneuver to control venous plexus bleeding or diffuse capillary hemorrhage during bone resection. * **Electrocautery (B):** Monopolar and bipolar cautery are essential for coagulating smaller vessels and soft tissue attachments to the mandible. * **Artery application (D):** The definitive management for bleeding during mandibulectomy is the identification and **ligation (clamping/tying)** of major vessels like the inferior alveolar artery before or immediately after the bone cut. **NEET-PG High-Yield Pearls:** * The **Inferior Alveolar Artery** is the most common source of significant intra-osseous bleeding during a mandibulectomy. * Pre-operative **selective embolization** may be considered for highly vascular tumors (e.g., Ameloblastoma or Central Giant Cell Granuloma) to reduce blood loss. * **Hypotensive anesthesia** is another systemic technique used to minimize blood loss in major maxillofacial procedures.

Q: The propensity of recurrence after surgical intervention is the least in which of the following conditions?

Odontoma. **Explanation:** The propensity for recurrence in odontogenic lesions depends on their biological behavior, growth pattern, and invasiveness. **Why Odontoma is the correct answer:** An **Odontoma** is classified as a **hamartoma** (a benign, disorganized growth of mature dental tissues) rather than a true neoplasm. It is characterized by slow growth and a well-defined capsule. Once surgically excised (enucleation), it has the **lowest recurrence rate** among the options provided because it lacks infiltrative properties and the biological drive for continuous cellular proliferation. **Analysis of Incorrect Options:** * **Ameloblastoma:** This is a locally aggressive, "benign but locally invasive" neoplasm. It has a high propensity for recurrence (up to 50-90% with simple curettage) because it tends to infiltrate the surrounding trabecular bone beyond its apparent clinical margins. * **Odontogenic Myxoma:** This is a locally invasive mesenchymal tumor with a gelatinous consistency and no capsule. Its "soap-bubble" or "honeycomb" appearance reflects its ability to infiltrate bone marrow spaces, leading to a high recurrence rate if not treated with wide surgical resection. * **Fibrosarcoma:** This is a malignant mesenchymal tumor. By definition, malignancies have a high risk of local recurrence and distant metastasis due to rapid cell division and aggressive local destruction. **Clinical Pearls for NEET-PG:** * **Odontoma:** Most common odontogenic "tumor." Two types: *Compound* (resembles small teeth, usually in anterior maxilla) and *Complex* (conglomerate mass, usually in posterior mandible). * **Ameloblastoma:** Most common site is the molar-ramus area of the mandible. Radiographically shows a "soap-bubble" appearance. * **Treatment Strategy:** While Odontomas require simple enucleation, aggressive lesions like Ameloblastoma and Myxoma often require radical resection with 1–1.5 cm margins to prevent recurrence.

Q: A 30-year-old male presents with pain in the lower right tooth region with no significant medical history. Extra-oral examination reveals a hard swelling corresponding to the ramus of the mandible. Intra-oral examination shows that tooth 48 is absent. Aspiration yields a thick, yellow, cheesy material. What is the most probable diagnosis?

Keratocystic odontogenic tumor. ### Explanation **Correct Option: B. Keratocystic Odontogenic Tumor (KCOT/OKC)** The diagnosis is based on the classic triad of clinical and aspirate findings. KCOT (formerly Odontogenic Keratocyst) typically occurs in the **posterior mandible (ramus/angle)**. The pathognomonic feature in this case is the aspiration of **thick, yellow, cheesy material**, which represents **desquamated keratin** (parakeratin). KCOTs are known for their aggressive local behavior, high recurrence rate, and association with Gorlin-Goltz syndrome. **Why Incorrect Options are Wrong:** * **A. Hyperplastic follicle:** This is a physiological enlargement of the dental follicle (usually <3mm). It does not present as a large hard swelling or contain cheesy keratinous material. * **C. Adenomatoid odontogenic tumor (AOT):** Known as the "two-thirds tumor," it occurs 2/3rd of the time in the **maxilla**, 2/3rd in young females, and 2/3rd associated with an impacted canine. It is usually a solid or cystic lesion but does not contain thick keratin. * **D. Dentigerous cyst:** While it is associated with an unerupted tooth (like the absent 48 here), the aspirate of a dentigerous cyst is typically a **clear, straw-colored fluid** with low protein content, not thick cheesy material. **NEET-PG High-Yield Pearls:** * **Aspirate Comparison:** KCOT = Cheesy/Creamy (Keratin); Dentigerous/Radicular Cyst = Straw-colored (Cholesterol crystals); Ameloblastoma = Brownish/Mucoid. * **Radiology:** KCOT often shows a multilocular "soap bubble" appearance (though less common than ameloblastoma) and tends to grow in an **anteroposterior direction** within the medullary bone without causing significant cortical expansion initially. * **Histology:** Characterized by a uniform 6–8 cell layer thick lining of parakeratinized stratified squamous epithelium with a **palisaded basal layer** (tombstone appearance).

Question 1

Which ganglion needs to be avoided during cervical sympathectomy to prevent Horner syndrome?

Accepted Answer

T1

Answer

T2

Answer

T3

Answer

T4

Question 2

Which of the following is not done in the treatment of ankylosis?

Accepted Answer

High condylar shave

Answer

Repositioning of temporal fascia

Answer

Ipsilateral coronoidectomy

Answer

Contralateral coronoidectomy

Question 3

The tooth most commonly involved in chronic focal sclerosing osteomyelitis is?

Accepted Answer

Mandibular first molar

Answer

Maxillary second molar

Answer

Maxillary third molar

Answer

Maxillary first molar

Question 4

What is the most common organism that causes the following condition?

Accepted Answer

Beta-hemolytic streptococci

Answer

Polymicrobial

Answer

Clostridium perfringens

Answer

Clostridium tetani

Question 5

Sistrunk operation is the preferred treatment for which of the following conditions?

Accepted Answer

Thyroglossal cyst

Answer

Retrosternal goiter

Answer

Endemic goiter

Answer

Adrenal incidentaloma

Question 6

What is the standard treatment for verrucous carcinoma of the lip?

Accepted Answer

Surgical excision

Answer

Surgery and radiotherapy

Answer

Laser therapy

Answer

Interferon

Question 7

Excessive blood loss during mandibulectomy can be prevented by all of the following except?

Accepted Answer

Adrenaline infiltration

Answer

Use of pressure and packing

Answer

Use of electrocautery

Answer

Artery application to the open vessels

Question 8

What is a major indication for orthognathic surgery before puberty?

Accepted Answer

Ankylosis of the mandible

Answer

Transverse deficiency of the maxilla

Answer

Prognathic mandible

Answer

Hyperdivergent facial pattern with anterior open bite

Question 9

The propensity of recurrence after surgical intervention is the least in which of the following conditions?

Accepted Answer

Odontoma

Answer

Ameloblastoma

Answer

Odontogenic myxoma

Answer

Fibrocarcoma

Question 10

A 30-year-old male presents with pain in the lower right tooth region with no significant medical history. Extra-oral examination reveals a hard swelling corresponding to the ramus of the mandible. Intra-oral examination shows that tooth 48 is absent. Aspiration yields a thick, yellow, cheesy material. What is the most probable diagnosis?

Accepted Answer

Keratocystic odontogenic tumor

Answer

Hyperplastic follicle

Answer

Adenomatoid odontogenic tumor

Answer

Dentigerous cyst

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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