Head and Neck Surgery Practice Questions

Q: Which surgical landmarks are used for locating the facial nerve?

All of the options. ***All of the options*** - The **tympano-mastoid suture**, the **tragal pointer**, and the **posterior belly of the digastric** muscle are all commonly used surgical landmarks for identifying and preserving the facial nerve during parotidectomy or other procedures in the vicinity. - Using multiple landmarks provides a more reliable and precise localization of the facial nerve, reducing the risk of iatrogenic injury. *Tympano - mastoid suture* - This suture line is an important external landmark that helps guide the dissection towards the **stylomastoid foramen**, where the facial nerve exits the skull. - The facial nerve typically lies deep and anterior to this suture, providing a valuable starting point for identification. *Tragal pointer* - The **tragal pointer** (cartilaginous projection of the tragus) points directly towards the main trunk of the facial nerve as it enters the parotid gland. - It is a highly reliable superficial landmark, particularly useful in locating the superior aspect of the facial nerve trunk. *Posterior belly of digastric* - The **posterior belly of the digastric muscle** serves as a deep landmark, as the facial nerve typically courses immediately superior and lateral to it. - Dissection along the superior border of this muscle can lead directly to the facial nerve trunk, especially when dissecting inferiorly.

Q: A 23-year-old male patient presents with midline swelling in the neck. The swelling moves with deglutition and protrusion of the tongue. What is the likely diagnosis?

Thyroglossal cyst. ***Thyroglossal cyst*** - A **thyroglossal cyst** is a congenital anomaly that arises from the persistent **thyroglossal duct**, a remnant of the thyroid's embryologic descent. - Its classic diagnostic feature is its movement with **deglutition** (due to attachment to the hyoid bone, which moves during swallowing) and **protrusion of the tongue** (as the thyroglossal duct is connected to the base of the tongue). *Brachial cyst* - A **brachial cyst** is a congenital neck mass that typically presents as a lateral neck swelling, often located along the anterior border of the **sternocleidomastoid muscle**. - Unlike a thyroglossal cyst, it does not typically move with **deglutition** or **tongue protrusion**. *Plunging ranula* - A **plunging ranula** is a type of mucocele that arises from the **sublingual gland** and extends below the mylohyoid muscle into the neck. - It presents as a cervical mass but is typically located in the floor of the mouth or submandibular region and does not move with **deglutition** or **tongue protrusion**. *Dermoid cyst* - A **dermoid cyst** is a congenital cyst that can occur anywhere on the body, including the head and neck, often presenting as a painless mass. - It arises from sequestered embryonic ectoderm and mesoderm, containing skin appendages, but it does not move with **deglutition** or **tongue protrusion**.

Q: A middle-aged man presents with a swelling in the neck that has been present since childhood. The swelling has a bag or worm-like appearance and features a central black spot. Based on this description, what is the most likely diagnosis?

Plexiform neurofibroma. ***Plexiform neurofibroma*** - The description of a swelling since childhood with a **bag-of-worms appearance** and a **central black spot** is highly characteristic of a plexiform neurofibroma, a benign tumor of peripheral nerves. - These lesions are often associated with **neurofibromatosis type 1 (NF1)** and can grow quite large, causing cosmetic and functional concerns. - The **central black spot** represents pigmentation often seen in neurofibromas, particularly in NF1. *Cirsoid aneurysm* - A cirsoid aneurysm is a **congenital arteriovenous malformation** characterized by a tortuous mass of dilated blood vessels. - While it can manifest as a swelling, it typically presents with a **palpable thrill and audible bruit**, and its appearance is not usually described as having a central black spot. *Varicocele* - A varicocele is an **abnormal enlargement of the pampiniform plexus veins** in the scrotum, often described as a **bag of worms**, but it occurs exclusively in the scrotum. - It would not be found in the neck and does not feature a central black spot. *Lymphangioma* - A lymphangioma is a **benign malformation of the lymphatic system** that can present as a soft, compressible mass, often in the neck. - While present since childhood, its appearance is typically **cystic or multicystic** and does not usually have the distinct bag-of-worms texture or a central black spot described.

Q: What is Pott’s puffy tumor?

Subperiosteal abscess of frontal bone. ***Subperiosteal abscess of frontal bone*** - **Pott's puffy tumor** is a rare complication resulting from untreated or inadequately treated **frontal sinusitis**, leading to osteomyelitis of the frontal bone. - The infection spreads through the venous system or direct erosion, forming a **subperiosteal abscess** on the outer table of the frontal bone, often presenting as a tender, doughy swelling on the forehead. *Subperiosteal abscess of ethmoid bone* - While abscesses can occur in conjunction with ethmoid sinusitis, this condition does not specifically correspond to the definition of **Pott's puffy tumor**, which is characteristic of frontal bone involvement. - **Ethmoid sinusitis** is more commonly associated with orbital complications rather than a forehead swelling. *Mucocele of frontal bone* - A **mucocele** is an expansile, cystic lesion filled with mucus, typically resulting from obstruction of a sinus ostium. It is not an infectious process involving an abscess. - While it can cause swelling or bone erosion, it does not involve the acute inflammatory and infectious features of a **subperiosteal abscess**. *Mucocele of ethmoid bone* - Similar to a frontal mucocele, an ethmoid mucocele is a **non-infectious cystic lesion** filled with mucus due to obstruction of the ethmoid sinus drainage. - It does not involve a collection of pus or an active infectious process characteristic of **Pott's puffy tumor**.

Q: A patient presented with a history of diplopia and restricted eye movements. What is the most likely diagnosis based on the clinical and CT images?

Blowout fracture. ***Blowout fracture*** - The CT image shows a **fracture of the orbital floor**, with associated **herniation of orbital contents** (fat and inferior rectus muscle) into the maxillary sinus. - This type of fracture commonly causes **diplopia** (due to muscle entrapment) and **restricted eye movements**. *Le Fort fracture* - Le Fort fractures involve the **midface and maxilla** as a whole, typically causing widespread facial instability. - They are classified into three types (I, II, III), none of which are exclusively characterized by an isolated orbital floor fracture with muscle entrapment. *Maxillary fracture* - While an orbital floor fracture involves the maxilla, a "maxillary fracture" is a broad term and does not specifically describe the characteristic features of **orbital content prolapse** and their resulting symptoms. - Isolated maxillary fractures might not cause diplopia or restricted eye movements unless they directly involve the orbit. *Zygomatic fracture* - A zygomatic fracture (either isolated or as part of a zygomaticomaxillary complex fracture) primarily affects the **cheekbone**. - While it can involve the orbital rim, it typically presents with **facial asymmetry**, **numbness** in the infraorbital nerve distribution, and sometimes **trismus**, rather than isolated muscle entrapment causing diplopia, as seen in the image.

Q: In which condition is surgical intervention involving partial or full closure of the nasal cavity typically performed?

Atrophic rhinitis. ***Atrophic rhinitis*** - Surgical intervention, specifically **Young's operation** (partial or full closure of the nostril), is performed to create a moist environment and promote mucosal healing in severe cases. - This condition involves **progressive atrophy of nasal mucosa** and turbinates, leading to dryness, crusting, and a foul odor, which surgery aims to alleviate. *Allergic rhinitis* - This is an inflammatory condition triggered by **allergens**, typically managed with antihistamines, nasal corticosteroids, and allergen avoidance. - Surgical intervention is generally not indicated, as it does not address the underlying allergic immune response. *Vasomotor rhinitis* - Characterized by **non-allergic, non-infectious rhinitis** due to autonomic nervous system dysfunction, often triggered by irritants or temperature changes. - Management focuses on symptom relief with nasal sprays (anticholinergics or corticosteroids) and trigger avoidance, not surgical closure. *Occupational rhinitis* - This type is caused by **exposure to irritants or sensitizers** in the workplace, leading to nasal inflammation. - Treatment involves identifying and avoiding the offending agent, alongside symptomatic relief, with no role for surgical closure of the nasal cavity.

Q: What is the most common cause of a parotid mass that presents with mixed consistency?

Pleomorphic adenoma. ***Pleomorphic adenoma*** - The presence of a **mixed consistency** parotid mass, often noted as a **firm yet compressible** lump, is characteristic of pleomorphic adenoma. - This tumor's **benign nature** allows for gradual growth and is the most common parotid gland tumor, often being mobile and well-defined on examination [1]. *All* - The term "all" is too vague and does not specify a particular pathology or characteristics relevant to a **mixed consistency** mass. - It does not represent any known entity, making it an unsuitable answer in the context of **specific diagnosis**. *Sebaceous cyst* - Sebaceous cysts are typically **smooth, soft, and fluctuant**, lacking the mixed consistency seen in pleomorphic adenomas. - They are also usually associated with **skin** and hair follicles, not commonly arising in the parotid gland region. *Dermoid cyst* - Dermoid cysts usually present as **soft, cystic lesions** filled with **keratin**, which does not align with the mixed consistency nature of pleomorphic adenomas. - They can occur in various locations but are not the typical presentation for a parotid mass. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. Head and Neck, pp. 751-753.

Q: Where will be the placement location for Auditory Brainstem Implant?

Recess of 4th ventricle. ***Recess of 4th ventricle*** - An **Auditory Brainstem Implant (ABI)** is placed on the **cochlear nucleus** in the brainstem, which is anatomically located near the **lateral recess of the fourth ventricle**. - The implant stimulates these nuclei directly, bypassing the damaged auditory nerve in patients who cannot benefit from cochlear implants. *Scala tympani* - The **scala tympani** is the location for electrode placement in a **cochlear implant**, not an auditory brainstem implant. - Cochlear implants stimulate the intact auditory nerve within the cochlea. *IAC* - The **internal auditory canal (IAC)** houses the auditory and facial nerves, but it is not the target site for an ABI. - The ABI is designed for patients whose auditory nerve (which passes through the IAC) is non-functional. *Back of ear* - The "back of the ear" is the general area where the **external processor of a cochlear implant** or a **bone-anchored hearing aid** is typically worn, not the surgical placement site for an ABI. - The ABI's internal component is surgically placed within the cranium.

Q: Which of the following stages of lip carcinoma does not have nodal involvement?

T3N0. ***T3N0*** - The **'N' classification** in the TNM staging system refers to **nodal involvement**. A stage with **'N0' indicates no regional lymph node metastasis**. - A **T3 lesion** signifies a large primary tumor, but if it's accompanied by **N0**, it means there's no evidence of spread to the lymph nodes. *T2N1* - The **'N1' classification** indicates the presence of **regional lymph node metastasis**, specifically in a **single ipsilateral lymph node** that is 3 cm or less in its greatest dimension. - This stage therefore **does have nodal involvement**, contradicting the premise of the question. *T2N2* - The **'N2' classification** signifies more advanced regional lymph node metastasis, such as a **single ipsilateral lymph node** greater than 3 cm but not more than 6 cm. - It could also refer to **multiple ipsilateral lymph nodes**, none greater than 6 cm, or bilateral/contralateral lymph nodes, none greater than 6 cm. In all these cases, **nodal involvement is present**. *T1N1* - Similar to T2N1, the **'N1' component** in T1N1 indicates the presence of **regional lymph node metastasis** in a single ipsilateral lymph node of 3 cm or less. - Therefore, this stage **does involve nodal spread**, despite having a smaller primary tumor (T1).

Q: Which of the following statements about Branchial cysts is true:

Most common site is lateral neck. ***Most common site is lateral neck*** - **Branchial cleft cysts** typically present as a mass in the **lateral neck**, anterior to the sternocleidomastoid muscle. - They are congenital anomalies resulting from incomplete obliteration of the branchial clefts during embryonic development. *50-70% are seen in lungs* - This statement is incorrect; branchial cysts are **cervical anomalous masses** arising from the branchial apparatus, not primarily found in the lungs. - Lung lesions are more commonly associated with congenital pulmonary airway malformations or bronchogenic cysts, which differ in origin. *They are premalignant lesions* - Branchial cysts are generally **benign lesions** and do not typically transform into malignancy. - While rare cases of carcinoma arising within a branchial cleft cyst have been reported, they are not considered routinely premalignant. *Infection is uncommon in branchial cysts* - Conversely, infection is a **common complication** of branchial cysts, often leading to sudden enlargement, pain, and erythema. - The presence of internal fluid and epithelial lining makes them susceptible to bacterial colonization and subsequent abscess formation.

Question 1

Which surgical landmarks are used for locating the facial nerve?

Accepted Answer

All of the options

Answer

Tympano - mastoid suture

Answer

Tragal pointer

Answer

Posterior belly of digastric

Question 2

A 23-year-old male patient presents with midline swelling in the neck. The swelling moves with deglutition and protrusion of the tongue. What is the likely diagnosis?

Accepted Answer

Thyroglossal cyst

Answer

Brachial cyst

Answer

Plunging ranula

Answer

Dermoid cyst

Question 3

A middle-aged man presents with a swelling in the neck that has been present since childhood. The swelling has a bag or worm-like appearance and features a central black spot. Based on this description, what is the most likely diagnosis?

Accepted Answer

Plexiform neurofibroma

Answer

Cirsoid aneurysm

Answer

Varicocele

Answer

Lymphangioma

Question 4

What is Pott’s puffy tumor?

Accepted Answer

Subperiosteal abscess of frontal bone

Answer

Subperiosteal abscess of ethmoid bone

Answer

Mucocele of frontal bone

Answer

Mucocele of ethmoid bone

Question 5

A patient presented with a history of diplopia and restricted eye movements. What is the most likely diagnosis based on the clinical and CT images?

Accepted Answer

Blowout fracture

Answer

Le Fort fracture

Answer

Maxillary fracture

Answer

Zygomatic fracture

Question 6

In which condition is surgical intervention involving partial or full closure of the nasal cavity typically performed?

Accepted Answer

Atrophic rhinitis

Answer

Allergic rhinitis

Answer

Vasomotor rhinitis

Answer

Occupational rhinitis

Question 7

What is the most common cause of a parotid mass that presents with mixed consistency?

Accepted Answer

Pleomorphic adenoma

Answer

Sebaceous cyst

Answer

Dermoid cyst

Answer

Warthin tumor

Question 8

Where will be the placement location for Auditory Brainstem Implant?

Accepted Answer

Recess of 4th ventricle

Answer

Scala tympani

Answer

IAC

Answer

Back of ear

Question 9

Which of the following stages of lip carcinoma does not have nodal involvement?

Accepted Answer

T3N0

Answer

T2N1

Answer

T2N2

Answer

T1N1

Question 10

Which of the following statements about Branchial cysts is true:

Accepted Answer

Most common site is lateral neck

Answer

50-70% are seen in lungs

Answer

They are premalignant lesions

Answer

Infection is uncommon in branchial cysts

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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