Head and Neck Surgery — MCQs

Head and Neck Surgery Indian Medical PG Practice Questions and MCQs

Question 481: What is the classification of a glomus jugulare tumor that invades the vertical part of the carotid canal?

A. Type A
B. Type B
C. Type C (Correct Answer)
D. Type D

Explanation: ***Type C (Fisch Classification)*** - A **Type C glomus jugulare tumor** is defined by its deep invasion into the **carotid canal**, specifically involving the vertical portion (Type C1). - This classification (Fisch Classification) highlights the significant **intracranial extension** and potential for neurological complications due to the invasion of critical vascular and neural structures. - The Fisch Classification is specifically used for **glomus jugulare tumors** to assess surgical approach and prognosis. *Type A* - **Type A glomus tumors** are typically smaller, localized to the **middle ear cavity** and jugular bulb, without bone erosion of the carotid canal. - These tumors are generally confined without extending into the carotid canal or petrous bone. *Type B* - **Type B glomus tumors** show involvement with erosion into the **mastoid** and extensive involvement of the jugular bulb. - While they are more extensive than Type A, they do not involve the **carotid canal**. *Type D* - **Type D glomus tumors** are characterized by extensive intracranial extension beyond the carotid canal, with involvement of the **cavernous sinus** or central skull base. - These tumors represent the most advanced stage with significant intracranial extension.

Question 482: What is the surgical procedure known as the 'Commando operation' primarily used for?

A. Disarticulation of the hip due to gas gangrene
B. Extended radical mastectomy for breast cancer
C. Abdomino-perineal resection for rectal carcinoma
D. Excision of carcinoma of the tongue, the floor of the mouth, part of the jaw and lymph nodes en bloc (Correct Answer)

Explanation: ***Excision of carcinoma of the tongue, the floor of the mouth, part of the jaw and lymph nodes en bloc*** - The "Commando operation" is a radical surgical procedure primarily used for advanced **oral cancers**. - It involves an **en bloc resection** of the primary tumor (often in the tongue or floor of the mouth), a partial mandibulectomy (removal of part of the jaw), and a radical neck dissection for lymph node clearance. *Disarticulation of the hip due to gas gangrene* - This is a procedure to remove the entire leg at the hip joint due to severe infection like **gas gangrene**, but it is not referred to as a "Commando operation." - Gas gangrene requires emergent disarticulation due to rapid progression and high mortality risk, unrelated to the planned oncological resection of the "Commando operation." *Extended radical mastectomy for breast cancer* - This procedure for breast cancer involves removal of the breast, pectoral muscles, and axillary lymph nodes. - While radical, it is distinctly different from the head and neck surgery known as the "Commando operation." *Abdomino-perineal resection for rectal carcinoma* - This is a surgical procedure for **rectal cancer** involving removal of the rectum and anus, often resulting in a permanent colostomy. - It is a specialized colorectal surgery and not associated with the term "Commando operation."

Question 483: What is the treatment of choice for nasopharyngeal carcinoma?

A. Chemotherapy
B. Concurrent chemoradiotherapy (Correct Answer)
C. Radiotherapy
D. Surgical intervention

Explanation: ***Concurrent chemoradiotherapy*** - **Concurrent chemoradiotherapy (CCRT)** is the current standard of care and treatment of choice for nasopharyngeal carcinoma, particularly for locoregionally advanced disease (Stage II-IVB). - The landmark **Intergroup 0099 trial** and subsequent meta-analyses have demonstrated significant improvement in overall survival and progression-free survival with cisplatin-based CCRT compared to radiotherapy alone. - CCRT combines the radiosensitizing effect of chemotherapy with direct tumoricidal effects, leading to better local control and reduced distant metastases. - This is the **evidence-based standard** recommended by major oncology guidelines (NCCN, ESMO) for the majority of NPC patients. *Radiotherapy* - While **radiotherapy alone** was historically the mainstay of treatment and remains highly effective due to NPC's radiosensitivity, it has been superseded by CCRT for most cases. - RT alone may still be appropriate for **very early stage disease (T1N0)** or in patients who cannot tolerate chemotherapy due to comorbidities. - As a single modality, it has lower cure rates compared to CCRT for advanced disease. *Surgical intervention* - **Surgical intervention** is not the primary treatment for nasopharyngeal carcinoma due to the tumor's challenging anatomical location in the nasopharynx, with proximity to critical neurovascular structures and the skull base. - Surgery is reserved for **salvage treatment** of locally recurrent disease after radiotherapy or for neck dissection in cases of persistent nodal disease. *Chemotherapy* - **Chemotherapy alone** is not curative for nasopharyngeal carcinoma. - It is used as part of combination treatment: concurrently with RT (CCRT), as induction therapy before CCRT, or as adjuvant therapy after CCRT in high-risk cases. - Systemic chemotherapy alone is reserved for metastatic or recurrent disease not amenable to locoregional treatment.

Question 484: Which of the following statements about Grisel syndrome is false?

A. It can occur after adenoidectomy.
B. It involves inflammation of cervical spine ligaments.
C. A neurosurgeon is never needed. (Correct Answer)
D. Conservative treatment is the first-line approach in most cases.

Explanation: ***A neurosurgeon is never needed.*** - This statement is false because severe cases of **Grisel syndrome** may require surgical intervention, necessitating consultation with a **neurosurgeon**. - Surgical management, such as **cervical fusion**, may be indicated in cases of irreducible subluxation or neurological compromise. *It can occur after adenoidectomy.* - This statement is true; **Grisel syndrome** is a rare complication that may occur following **adenoidectomy** or other head and neck surgeries. - The postulated mechanism involves inflammation spreading from the pharynx to the alar and transverse ligaments, leading to **atlantoaxial subluxation**. *It involves inflammation of cervical spine ligaments.* - This statement is true; **Grisel syndrome** is characterized by non-traumatic **atlantoaxial subluxation** resulting from inflammatory laxity of the cervical ligaments. - Specifically, the **transverse and alar ligaments** become inflamed and weakened, leading to instability between the atlas (C1) and axis (C2). *Conservative treatment is the first-line approach in most cases.* - This statement is true; initial management of **Grisel syndrome** typically involves conservative measures such as **neck immobilization**, pain control, and muscle relaxants. - Early diagnosis and conservative treatment are crucial to prevent progression and potential neurological complications.

Question 485: What conditions are treated by Sistrunk's operation?

A. Parotid tumor
B. Thyroglossal fistula
C. Thyroglossal duct cyst (Correct Answer)
D. None of the options

Explanation: ***Thyroglossal duct cyst*** - The **Sistrunk procedure** is the surgical excision of a **thyroglossal duct cyst**, including the central portion of the hyoid bone and a core of tissue extending to the foramen cecum. - This extensive removal is necessary to prevent recurrence by eradicating any remnants of the **thyroglossal tract**, which is the developmental pathway of the thyroid gland. *Parotid tumor* - **Parotid tumors** are usually treated by different surgical procedures, such as **parotidectomy** (superficial or total), depending on the tumor's size and nature. - The surgical approach for parotid tumors involves careful dissection to preserve the **facial nerve**, which is anatomically distinct from the thyroid region. *Thyroglossal fistula* - While a **thyroglossal fistula** can result from an infected or ruptured **thyroglossal duct cyst**, the primary condition treated by Sistrunk's operation is the cyst itself, aiming to prevent both recurrence and fistula formation. - The Sistrunk procedure addresses the entire anatomical remnant, which is crucial for preventing not just fistula but also future cyst formation. *None of the options* - This option is incorrect because **Sistrunk's operation** is specifically designed for the definitive treatment of a **thyroglossal duct cyst**. - The procedure's detailed technique directly corresponds to the embryonic origins and potential recurrence pathways of this specific midline neck mass.

Question 486: What imaging study is typically required before endoscopic sinus surgery?

A. MRI of paranasal sinus
B. CT of PNS (Correct Answer)
C. Acoustic tests
D. Mucociliary clearing testing

Explanation: ***CT of PNS*** - A **CT scan of the paranasal sinuses** is crucial prior to endoscopic sinus surgery for detailed anatomical mapping. - It helps identify **key anatomical landmarks**, variations, and the extent of disease, minimizing surgical risks. *MRI of paranasal sinus* - **MRI** is generally reserved for evaluating **soft tissue abnormalities**, such as tumors, fungal infections, or intracranial extension. - It provides less detail regarding **bony anatomy** and is not the primary imaging modality for surgical planning in routine cases. *Mucociliary clearing testing* - **Mucociliary clearing tests** assess the function of the **mucociliary escalator** in the nasal cavity and sinuses. - These tests are primarily diagnostic for conditions like **primary ciliary dyskinesia** and do not provide anatomical detail for surgical guidance. *Acoustic tests* - **Acoustic tests** are typically used to assess **hearing function** in the ear. - They have **no relevance** to the anatomical evaluation of the paranasal sinuses or planning for endoscopic sinus surgery.

Question 487: Which of the following conditions is least likely to cause bilateral recurrent laryngeal nerve palsy?

A. Thyroid carcinoma
B. Lymphadenopathy
C. Thyroid surgery
D. Aortic aneurysm (Correct Answer)

Explanation: ***Aortic aneurysm*** - An aortic aneurysm, especially of the ascending aorta, is **less likely to cause bilateral recurrent laryngeal nerve palsy** because the left recurrent laryngeal nerve typically hooks under the aortic arch, while the right nerve hooks under the subclavian artery. - For **bilateral involvement**, two separate and simultaneous lesions affecting both nerves would be required at different anatomical locations with this etiology, making it a rare cause. *Thyroid carcinoma* - An aggressive **thyroid carcinoma** can directly invade or compress the recurrent laryngeal nerves (RLNs) due to their proximity to the thyroid gland. - If the carcinoma is extensive or multifocal, it can lead to **bilateral involvement** by affecting both nerves. *Lymphadenopathy* - Significant **cervical or mediastinal lymphadenopathy** (e.g., due to metastatic disease or lymphoma) can compress or encase both recurrent laryngeal nerves. - This proximity allows for potential **bilateral compression or damage** to the nerves as they ascend in the tracheoesophageal grooves. *Thyroid surgery* - **Thyroidectomy** is a common cause of recurrent laryngeal nerve injury due to the nerves' close anatomical relationship with the thyroid gland. - **Bilateral recurrent laryngeal nerve palsy** can occur if both nerves are damaged during dissection, often due to surgical misidentification, thermal injury, or traction.

Question 488: Which levels of cervical lymph nodes are included in a modified radical neck dissection?

A. I-IV
B. I-V (Correct Answer)
C. I-III
D. II-VI

Explanation: ***I-V*** - A modified radical neck dissection typically removes lymph nodes from levels **I through V**, along with preservation of one or more non-lymphatic structures (sternocleidomastoid muscle, internal jugular vein, or spinal accessory nerve). - This extensive dissection addresses potential metastasis to these node groups from head and neck cancers, crucial for adequate oncologic clearance while aiming for functional preservation. *I-III* - This limited dissection would likely be insufficient for many head and neck cancers, as spread often extends beyond level III. - It would miss potential metastases in the lower jugular and posterior triangle nodes, increasing the risk of recurrence. *I-IV* - This dissection omits **level V**, which includes the posterior triangle nodes, a common site for metastatic spread, especially for cancers of the oropharynx, hypopharynx, and thyroid. - Excluding level V would be considered an incomplete radical or modified radical neck dissection in many clinical scenarios. *II-VI* - This option incorrectly excludes lymph nodes at **level I** (submental and submandibular nodes), which are critical draining sites for many oral cavity cancers. - Including level VI (anterior compartment nodes) is typically part of a central compartment neck dissection, often performed for thyroid cancer, but is usually not part of a standard modified radical neck dissection for other head and neck primaries unless specifically indicated.

Question 489: What surgical procedure is commonly associated with the Weber-Ferguson approach?

A. Surgical removal of the mastoid process
B. Surgical removal of the maxilla (Correct Answer)
C. Repair of the eardrum
D. Surgical removal of the mandible

Explanation: ***Surgical removal of the maxilla*** - The **Weber-Ferguson approach** is a classic surgical incision used to access the midface, particularly for **maxillectomy**. - This approach provides excellent exposure for resecting tumors of the **maxilla**, nasal cavity, and paranasal sinuses. *Surgical removal of the mastoid process* - Removal of the mastoid process, known as **mastoidectomy**, is typically performed via a **postauricular incision** or an endaural approach. - This procedure is used for conditions like chronic otitis media or mastoiditis, and is unrelated to the Weber-Ferguson approach. *Repair of the eardrum* - **Tympanoplasty** is the surgical repair of the eardrum and is usually performed through an **endaural** or **postauricular incision**. - This procedure targets the middle ear and does not require the extensive midfacial access provided by the Weber-Ferguson approach. *Surgical removal of the mandible* - **Mandibulectomy** involves the surgical removal of part or all of the mandible and can be approached externally through incisions such as the **Risdon incision** or intraorally. - The Weber-Ferguson approach specifically targets the **upper jaw** and midface, not the lower jaw or mandible.

Question 490: Which of the following statements about thyroglossal cyst is NOT true?

A. Sistrunk's operation is the treatment of choice
B. Most common site is subhyoid region
C. Moves with protrusion of tongue
D. Does not move with deglutition (Correct Answer)

Explanation: ***Does not move with deglutition*** - A **thyroglossal cyst** is connected to the **foramen cecum** at the base of the tongue via a remnant of the thyroglossal duct, which **moves superiorly with both tongue protrusion and deglutition** due to its attachment to the hyoid bone. - The statement that it does not move with deglutition is therefore **incorrect**. *Moves with protrusion of tongue* - This statement is **true** because the **thyroglossal duct** is embryologically continuous with the tongue's base at the foramen cecum. - When the tongue is protruded, this connection pulls the cyst **upwards**. *Sistrunk's operation is the treatment of choice* - This statement is **true** because **Sistrunk's operation** involves removing the cyst along with the central portion of the **hyoid bone** and a core of tissue from the path to the foramen cecum. - This extensive removal is crucial to prevent recurrence, as simple excision often leaves remnants of the duct. *Most common site is subhyoid region* - This statement is **true** as approximately 60-65% of **thyroglossal cysts** are located in the **subhyoid region**, just below the hyoid bone. - Other common locations include suprahyoid and at the level of the thyrohyoid membrane.

Practice by Chapter

Salivary Gland Diseases

Practice Questions

Thyroid Gland Disorders

Practice Questions

Parathyroid Gland Disorders

Practice Questions

Neck Masses Evaluation

Practice Questions

Oral Cavity Lesions

Practice Questions

Laryngeal Disorders

Practice Questions

Head and Neck Cancer

Practice Questions

Reconstructive Techniques in Head and Neck Surgery

Practice Questions

Surgical Management of Sleep Apnea

Practice Questions

Airway Management in Head and Neck Surgery

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Surgical Approaches to the Neck

Practice Questions

Neck Dissection Techniques

Practice Questions

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