Head and Neck Surgery Practice Questions

Q: Lymph node metastasis in neck is almost never seen with:

Carcinoma vocal cords. ***Carcinoma vocal cords*** - The **vocal cords** are relatively poor in lymphatic drainage, which significantly reduces the likelihood of regional lymph node metastasis. - Due to this sparse lymphatic network, spread to cervical lymph nodes is rare, especially in early-stage disease. *Supraglottic carcinoma* - **Supraglottic** regions have a rich lymphatic network, leading to a high incidence of cervical lymph node metastasis, even in early stages. - Bilateral lymphatic drainage further increases the risk of nodal involvement. *Carcinoma of tonsil* - The **tonsils** are richly supplied with lymphatic vessels, making them prone to early and frequent metastasis to cervical lymph nodes. - Metastasis is often seen in levels II, III, and IV of the neck. *Papillary carcinoma thyroid* - **Papillary thyroid carcinoma** commonly metastasizes to regional lymph nodes, with documented rates as high as 30-80%. - Nodal metastasis can occur in the central compartment (level VI) and lateral neck (levels II-V).

Q: Most mucostatic impression material among the following is:

ZOE paste. ***ZOE paste*** - **Zinc Oxide-Eugenol (ZOE) paste** is a **mucostatic impression material**, meaning it records the soft tissues in their resting, undisplaced state. - Its low viscosity and slow setting time allow the material to flow gently over the tissues without compressing them, making it ideal for **edentulous ridges** to capture detailed anatomy without distortion. *Alginate* - **Alginate** is a **mucocompressive** impression material, meaning it displaces soft tissues due to its higher viscosity during insertion and setting. - It is commonly used for diagnostic casts and study models where some tissue displacement is acceptable, but not for definitive impressions requiring a mucostatic record. *Impression compound* - **Impression compound** is a **thermoplastic** material that is highly **mucocompressive** as it is manipulated in a plastic state and can deform soft tissues during impression taking. - It is often used for border molding or preliminary impressions where some tissue displacement can help define the periphery of a denture. *Elastomer* - **Elastomers** (e.g., silicone, polyether) can be both **mucostatic** or **mucocompressive** depending on their viscosity and the technique used for impression taking. - While some low-viscosity elastomers can be used mucostatically, many common elastomeric techniques involve moderate pressure, leading to some tissue displacement.

Q: A glomus tumor extending to involve the carotid canal is classified as:

Type CI. ***Type CI*** - The **Fisch classification system** for **glomus jugulare tumors** defines Type C1 as tumors involving the **vertical portion of the carotid canal**. - Type C tumors extend into the infralabyrinthine compartment of the temporal bone and involve the petrous apex. - C1 specifically indicates involvement of the carotid canal, representing a higher extent of disease and often requiring more complex surgical approaches due to the involvement of critical neurovascular structures. *Type C2* - In the Fisch classification, Type C2 refers to **glomus tumors** involving both the **vertical and horizontal portions of the carotid canal**. - This represents more extensive involvement than C1 but does not primarily denote carotid canal involvement as the defining characteristic asked in the question. *Type B* - This classification in the Fisch system describes **glomus tympanicum tumors** limited to the **tympanomastoid area** without involvement of the infralabyrinthine compartment. - It does not apply to tumors extending into the carotid canal. *Type C3* - In the Fisch classification, Type C3 refers to **glomus tumors** that invade the **horizontal (intrapetrous) portion of the carotid canal**. - While it also involves the carotid canal, C1 is the most appropriate answer as it specifically denotes initial carotid canal involvement.

Q: The walls of the orbit which are removed in the two wall decompression for proptosis of thyroid ophthalmopathy include:

Orbital floor and medial wall. ***Orbital floor and medial wall*** - The **orbital floor** and **medial wall** are the most commonly removed walls in a two-wall decompression for **thyroid ophthalmopathy** because they provide significant space for orbital tissue expansion. - This combination allows for reduction of **proptosis** and decompression of the optic nerve while minimizing the risk of adverse visual outcomes. *Medial and lateral walls* - While both the medial and lateral walls can be removed, removing only these two would provide less effective decompression compared to including the orbital floor, especially for severe proptosis. - Removing the lateral wall involves working closer to the **lacrimal gland** and may have different surgical risks compared to the floor. *Orbital floor and lateral wall* - Removing the orbital floor and lateral wall typically leads to less effective decompression for **proptosis** compared to including the medial wall, which is often severely affected by muscle swelling in thyroid eye disease. - Accessing the lateral wall and floor together can be more complex without the simultaneous removal of the medial wall. *Orbital roof and medial wall* - The **orbital roof** is generally not a primary target for two-wall decompression in thyroid ophthalmopathy as it carries a higher risk of complications related to the **cranial cavity** and provides less space for orbital contents compared to the floor and medial wall. - Decompressing the roof is usually reserved for very specific, severe cases where other approaches have failed, or for superior compartment pathology.

Q: What is the most appropriate treatment after resection of lateral border of tongue carcinoma with high-risk features (positive margins, perineural invasion)?

Adjuvant radiotherapy. ***Adjuvant radiotherapy*** - **Adjuvant radiotherapy** is the **standard of care** after surgical resection of **oral tongue squamous cell carcinoma** with **high-risk features** such as: - **Positive or close margins** ( 4 mm depth) - **Advanced T stage** (T3-T4) - These features significantly **increase the risk of local recurrence**, and adjuvant radiotherapy improves **locoregional control** and **overall survival**. - The **tongue** has rich lymphatic drainage making it prone to both local recurrence and regional metastasis, necessitating adjuvant therapy. *Systemic chemotherapy* - **Systemic chemotherapy alone** is not used as adjuvant treatment after resection of oral tongue carcinoma. - It may be combined with radiotherapy (**concurrent chemoradiotherapy**) in cases with **extranodal extension** or multiple positive nodes, but standalone chemotherapy is reserved for **palliative treatment** of distant metastatic disease. *Surgical neck dissection* - **Neck dissection** is typically performed **at the same time** as primary tumor resection (concurrent procedure), not as a separate "after treatment." - It addresses **regional lymph node metastasis** rather than controlling the primary tumor site. - If not done initially and nodes become clinically positive later, it would be therapeutic neck dissection, but this is not routine adjuvant therapy. *Postoperative observation* - **Observation alone** is appropriate only for **very early-stage disease** (T1N0) with **clear margins** (>5 mm), **no depth invasion** (<4 mm), and **absence of adverse features** like PNI or LVI. - Given the presence of **high-risk features** in this scenario, observation would result in unacceptably high rates of **local recurrence**.

Q: Which of the following is NOT a surgical landmark for parotid surgery?

Inferior belly of omohyoid. ***Inferior belly of omohyoid*** - The **inferior belly of the omohyoid** muscle is located in the anterior triangle of the neck and is not anatomically relevant to parotid gland surgery. - Its position is too medial and inferior to serve as a reliable landmark for the facial nerve or the parotid gland itself. *Tragal pointer* - The **tragal pointer** is a crucial and easily palpable landmark for locating the main trunk of the facial nerve during parotidectomy. - The facial nerve typically emerges approximately 1 cm deep and inferior to the tragal pointer. *Digastric posterior belly* - The **posterior belly of the digastric muscle** courses anteriorly and inferiorly to the entry point of the facial nerve into the parotid gland. - Following this muscle provides a reliable anatomical guide to identify the facial nerve, as the nerve often crosses superficial to it. *Stylomastoid foramen* - The **stylomastoid foramen** is the exit point of the facial nerve from the skull, located between the styloid and mastoid processes. - Identifying this foramen allows for direct localization of the facial nerve trunk as it emerges to enter the parotid gland.

Q: A patient presents with a gradually progressive, painless mass persisting for 10 years. The mass is firm to nodular and shows variable consistency within different areas of the swelling. What is the most probable diagnosis?

Pleomorphic adenoma. ***Pleomorphic adenoma*** - A **gradually progressive**, **painless mass** that has been present for 10 years, with a **firm to nodular** consistency and variability at different sites, is highly characteristic of a pleomorphic adenoma. - This benign tumor of salivary glands is known for its **slow growth** and **variable histological composition**, leading to its characteristic consistency. *Dermoid cyst* - Dermoid cysts are typically **present from birth** or early childhood and tend to be **soft and doughy** in consistency, rather than firm or nodular with variable consistency. - While painless, their growth pattern and texture differ from the described mass. *Malignancy* - A mass that has been present for **10 years** and is still described as **gradually progressive** but painless is less likely to be a malignancy, as most malignant tumors tend to grow more rapidly and often present with pain or other symptoms over such a long period. - Malignancies usually demonstrate a more infiltrative and aggressive growth pattern. *Sebaceous cyst* - A sebaceous cyst (epidermoid cyst) typically presents as a **smooth, movable, dome-shaped lump** and contains a cheesy, malodorous material, which is not consistent with a firm to nodular mass with varying consistency. - While they can be long-standing and painless, their characteristic feel and contents are different.

Q: High tracheostomy is NOT done in:-

Laryngeal carcinoma. ***Laryngeal carcinoma*** - High tracheostomy is **contraindicated** in laryngeal carcinoma due to risk of **stomal recurrence** and tumor seeding at the tracheostomy site. - It can contaminate the **surgical field** and compromise oncological principles, making future surgical resection more complex. *Laryngomalacia* - High tracheostomy **is indicated** in severe laryngomalacia when there is significant **respiratory distress** or failure to thrive. - It bypasses the **collapsing supraglottic structures** and provides a secure airway above the level of obstruction. *Vocal cord palsy* - High tracheostomy **may be performed** in bilateral vocal cord palsy causing severe **airway obstruction** and stridor. - It provides immediate airway relief while preserving options for future **vocal cord procedures** or reinnervation surgeries. *Subglottic stenosis* - High tracheostomy **is appropriate** in subglottic stenosis as it places the stoma **above the level of stenosis**. - It allows for **staged surgical repair** of the stenotic segment while maintaining airway patency during reconstruction procedures.

Q: All of the following statements are true about Frey's Syndrome except

Sympathetic nerve involvement is the primary cause. ***Sympathetic nerve involvement is the primary cause*** - **This is FALSE (Correct answer for EXCEPT question)** - Frey's syndrome is **NOT** caused by sympathetic nerve involvement - The primary cause is **aberrant regeneration of severed PARASYMPATHETIC fibers** of the auriculotemporal nerve - These parasympathetic fibers mistakenly re-innervate sweat glands (which are sympathetically innervated) instead of the parotid gland - This misdirection causes gustatory sweating during meals *Less chances with enucleation than parotidectomy* - **TRUE** - Enucleation is a less extensive procedure compared to complete parotidectomy - Less tissue removal means less nerve disruption and lower risk of auriculotemporal nerve damage - The risk of Frey's syndrome is directly proportional to the extent of parotid tissue removal *Gustatory sweating* - **TRUE** - This is the hallmark symptom of Frey's syndrome - Characterized by sweating on the skin over the parotid region in response to salivary stimuli (smelling, seeing, or eating food) - Results from misdirected parasympathetic fibers stimulating sweat glands instead of salivary tissue *Aberrant misdirection of parasympathetic fibers of auriculotemporal nerve* - **TRUE** - This is the correct pathophysiological mechanism underlying Frey's syndrome - Following injury to the auriculotemporal nerve during parotid surgery, regenerating parasympathetic secretomotor fibers become misdirected - These fibers intended for the parotid gland instead innervate sweat glands in the overlying skin

Question 1

Lymph node metastasis in neck is almost never seen with:

Accepted Answer

Carcinoma vocal cords

Answer

Supraglottic carcinoma

Answer

Carcinoma of tonsil

Answer

Papillary carcinoma thyroid

Question 2

Most mucostatic impression material among the following is:

Accepted Answer

ZOE paste

Answer

Alginate

Answer

Impression compound

Answer

Elastomer

Question 3

A glomus tumor extending to involve the carotid canal is classified as:

Accepted Answer

Type CI

Answer

Type C2

Answer

Type B

Answer

Type C3

Question 4

The walls of the orbit which are removed in the two wall decompression for proptosis of thyroid ophthalmopathy include:

Accepted Answer

Orbital floor and medial wall

Answer

Medial and lateral walls

Answer

Orbital floor and lateral wall

Answer

Orbital roof and medial wall

Question 5

What is the most appropriate treatment after resection of lateral border of tongue carcinoma with high-risk features (positive margins, perineural invasion)?

Accepted Answer

Adjuvant radiotherapy

Answer

Systemic chemotherapy

Answer

Surgical neck dissection

Answer

Postoperative observation

Question 6

Which of the following is NOT a surgical landmark for parotid surgery?

Accepted Answer

Inferior belly of omohyoid

Answer

Tragal pointer

Answer

Digastric posterior belly

Answer

Stylomastoid foramen

Question 7

Le Forte II is fracture of?

Accepted Answer

Fracture involving zygomatic process of the maxilla, floor of orbit, root of nose

Answer

Fracture involving midline of the palate and zygomatico-maxillary suture

Answer

Fracture involving alveolar ridge

Answer

Fracture involving lateral side of hard palate

Question 8

A patient presents with a gradually progressive, painless mass persisting for 10 years. The mass is firm to nodular and shows variable consistency within different areas of the swelling. What is the most probable diagnosis?

Accepted Answer

Pleomorphic adenoma

Answer

Dermoid cyst

Answer

Malignancy

Answer

Sebaceous cyst

Question 9

High tracheostomy is NOT done in:-

Accepted Answer

Laryngeal carcinoma

Answer

Vocal cord palsy

Answer

Subglottic stenosis

Answer

Laryngomalacia

Question 10

All of the following statements are true about Frey's Syndrome except

Accepted Answer

Sympathetic nerve involvement is the primary cause

Answer

Less chances with enucleation than parotidectomy

Answer

Gustatory sweating

Answer

Aberrant misdirection of parasympathetic fibers of auriculotemporal nerve

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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