Head and Neck Surgery Practice Questions

Q: Injury to the auriculotemporal nerve during parotid tumour removal can result in which of the following?

Gustatory sweating. ### Explanation **Correct Answer: C. Gustatory sweating (Frey’s Syndrome)** The **auriculotemporal nerve** (a branch of the Mandibular nerve, V3) carries two types of fibers to the parotid region: 1. **Parasympathetic fibers:** Secretomotor to the parotid gland. 2. **Sympathetic fibers:** Sudomotor to the sweat glands and vasomotor to the overlying skin. During parotidectomy, the auriculotemporal nerve is often injured. During the regeneration process, the **parasympathetic fibers** (originally intended for the parotid) misdirect and grow into the distal sheaths of the **sympathetic fibers** supplying the sweat glands. Consequently, a stimulus that normally triggers salivation (the sight or smell of food) instead causes localized sweating and flushing in the pre-auricular area. This phenomenon is known as **Frey’s Syndrome**. **Why other options are incorrect:** * **A. Facial paralysis:** This results from injury to the **Facial nerve (CN VII)**, which passes through the substance of the parotid gland but does not mediate gustatory sweating. * **B. Trigeminal neuralgia:** This is a chronic pain condition characterized by sudden, severe facial pain, usually idiopathic or due to vascular compression of the nerve root, not surgical trauma to terminal branches. * **D. Orolingual paraesthesia:** This would involve injury to the **Lingual nerve**, which provides sensation to the anterior two-thirds of the tongue. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Confirmed by the **Minor’s Starch-Iodine Test** (iodine turns blue/black in the presence of sweat and starch). * **Prevention:** Interposition of barriers like the **SMAS flap** or **Acellular Dermal Matrix** during surgery. * **Treatment:** Topical **Anticholinergics** (Glycopyrrolate) or **Botulinum toxin (Botox)** injections are the most effective modern treatments.

Q: All of the following are approaches to the Temporomandibular joint, except?

Gillie's temporal approach. **Explanation:** The correct answer is **Gillie’s temporal approach** because it is not used to access the Temporomandibular Joint (TMJ) itself; rather, it is a specific surgical technique used for the **reduction of isolated zygomatic arch fractures**. ### Why Gillie’s Approach is the Exception: In Gillie’s approach, an incision is made in the temporal region (within the hairline), and a plane is created deep to the **temporal fascia** but superficial to the **temporalis muscle**. An elevator (e.g., Bristow’s or Rowe’s) is passed down this plane to reach the medial aspect of the zygomatic arch to "pop" the fracture back into place. It does not provide visualization or surgical access to the TMJ capsule or disc. ### Evaluation of Other Options: * **Hind’s Retromandibular Approach:** This provides excellent access to the posterior border of the ramus and the condylar process. It is commonly used for ORIF (Open Reduction Internal Fixation) of subcondylar fractures. * **Alkayat-Bramley Preauricular Incision:** This is a modification of the standard preauricular approach. It uses a question-mark-shaped incision to provide wide exposure of the TMJ and zygomatic arch while protecting the upper branches of the facial nerve. It is considered the "gold standard" for TMJ ankylosis surgery. * **Endaural Approach:** The incision is made within the external auditory meatus. It provides direct access to the joint while hiding the scar within the ear canal, though it carries a risk of meatal stenosis. ### High-Yield Clinical Pearls for NEET-PG: * **Most common approach to TMJ:** Preauricular approach. * **Nerve at risk during TMJ surgery:** Facial nerve (specifically the temporal and zygomatic branches). * **Gillie’s Approach Landmark:** The incision is made 2.5 cm superior and anterior to the helix, staying deep to the deep temporal fascia to avoid the temporal branch of the facial nerve.

Q: What is the most common cause of TMJ ankylosis?

Trauma. **Explanation:** **TMJ (Temporomandibular Joint) ankylosis** refers to the fusion of the mandibular condyle to the glenoid fossa, resulting in restricted jaw opening. **1. Why Trauma is the Correct Answer:** Trauma is the leading cause of TMJ ankylosis worldwide (accounting for over 50-75% of cases). The most common mechanism is a **fall on the chin**, which causes an indirect fracture of the mandibular condyle. This leads to intra-articular hemorrhage (**hemarthrosis**). If the blood clot is not resorbed, it undergoes organization, leading to fibrous adhesion and eventual bony fusion (ossification) between the condyle and the temporal bone. **2. Analysis of Incorrect Options:** * **Osteoarthritis (B):** While it causes joint degeneration and pain, it rarely leads to complete bony ankylosis; it typically results in limited range of motion due to mechanical interference. * **Childhood illness (C):** Historically, middle ear infections (otitis media) or mastoiditis were common causes of TMJ ankylosis in children due to the proximity of the joint. However, with the advent of antibiotics, this incidence has significantly decreased. * **Rheumatoid arthritis (D):** RA is an inflammatory condition that can cause joint destruction and fibrous ankylosis, but it is far less common than trauma as a primary etiology. **3. Clinical Pearls for NEET-PG:** * **Most common cause:** Trauma (specifically condylar fractures). * **Most common age group:** Children (due to the high osteogenic potential of the periosteum and the vascular nature of the condyle). * **Clinical Sign:** "Bird-face" deformity (Micrognathia) occurs if ankylosis happens during the growth phase, as the condyle is the primary growth center of the mandible. * **Treatment of choice:** Gap arthroplasty or Interpositional arthroplasty.

Q: What is the primary causative factor for myofascial pain dysfunction syndrome of the temporomandibular joint (TMJ)?

Muscular overextension and overcontraction. **Explanation:** **Myofascial Pain Dysfunction Syndrome (MPDS)** is the most common cause of temporomandibular joint (TMJ) pain. Unlike internal derangements of the joint, MPDS is primarily a **psychophysiological disorder** involving the muscles of mastication rather than the joint structures themselves. **Why Option C is Correct:** The primary causative factor is **muscular overextension and overcontraction**, often triggered by psychological stress. This leads to parafunctional habits such as **bruxism** (teeth grinding) or clenching. These repetitive actions result in muscle fatigue, spasms, and the formation of "trigger points," which manifest as dull, aching pain in the preauricular region and restricted jaw movement. **Why Other Options are Incorrect:** * **Option A (Infratemporal space infection):** While this can cause trismus (lockjaw) and pain, it is an acute bacterial process characterized by fever and swelling, not the chronic functional etiology seen in MPDS. * **Option B (Auriculotemporal neuritis):** The auriculotemporal nerve provides sensory innervation to the TMJ, but primary neuritis is rare and does not account for the muscular spasms central to MPDS. * **Option D (Otitis media):** This is an inflammatory condition of the middle ear. While it can cause referred pain to the TMJ area, it does not involve the masticatory muscle dysfunction characteristic of MPDS. **High-Yield Clinical Pearls for NEET-PG:** * **Laskin’s Diagnostic Criteria:** MPDS is diagnosed by the presence of unilateral pain, muscle tenderness, clicking sounds (sometimes), and limitation of jaw opening. * **Management:** Treatment is conservative, focusing on **stress reduction**, NSAIDs, muscle relaxants, and soft occlusal splints (night guards). * **Demographics:** It is most frequently seen in young females (20–40 years).

Q: What is the commonest treatment for a Branchial cyst?

Excision. **Explanation:** A **Branchial cyst** is a congenital epithelial cyst arising from the remnants of the second branchial cleft (95% of cases). It typically presents as a soft, fluctuant, non-transilluminant mass at the junction of the upper third and middle third of the sternocleidomstoid muscle. **Why Excision is the Correct Answer:** The definitive treatment for a branchial cyst is **complete surgical excision**. This is necessary because the cyst has a high propensity for recurrent infections and can lead to fistula formation if left untreated. During surgery, care must be taken to identify and preserve the carotid vessels, as the cyst is typically located in the carotid triangle, deep to the cervical fascia. **Analysis of Incorrect Options:** * **A. Cystectomy:** While technically similar to excision, "Excision" is the preferred surgical terminology for the complete removal of the cyst along with its lining to prevent recurrence. * **B. Aspiration:** Aspiration is only used as a diagnostic tool (to find cholesterol crystals) or to temporarily relieve pressure in an infected cyst. It is never curative, as the epithelial lining remains, leading to inevitable recurrence. * **D. No treatment:** Conservative management is not recommended due to the high risk of secondary infection (abscess formation) and the rare risk of branchiogenic carcinoma in older adults. **High-Yield Clinical Pearls for NEET-PG:** * **Location:** Most common at the anterior border of the upper 1/3rd of the Sternocleidomstoid muscle. * **Pathognomonic Finding:** Aspiration of the cyst fluid typically reveals **cholesterol crystals**. * **Lining:** Usually lined by stratified squamous epithelium. * **Differential Diagnosis:** Must be differentiated from a cold abscess (TB) or Carotid Body Tumor. * **Age:** Usually presents in late childhood or early adulthood (2nd–3rd decade).

Q: Laryngeal Papillomatosis is caused by which virus?

Human Papillomavirus (HPV). **Explanation:** **Laryngeal Papillomatosis** (also known as Recurrent Respiratory Papillomatosis or RRP) is a benign neoplastic condition characterized by the growth of multiple finger-like projections (papillomas) in the respiratory tract, most commonly on the true vocal cords. 1. **Why HPV is Correct:** The condition is caused by the **Human Papillomavirus (HPV)**. Specifically, **HPV types 6 and 11** are responsible for over 90% of cases. These are "low-risk" types that cause benign epithelial proliferation rather than malignancy. In children (Juvenile-onset RRP), the virus is typically acquired during birth via an infected maternal birth canal. In adults (Adult-onset RRP), it is often associated with orogenital contact. 2. **Why Other Options are Incorrect:** * **EBV (Epstein-Barr Virus):** Primarily associated with Nasopharyngeal Carcinoma, Burkitt’s Lymphoma, and Infectious Mononucleosis. * **CMV (Cytomegalovirus):** Causes retinitis or esophagitis in immunocompromised patients and congenital infections, but not laryngeal growths. * **HSV (Herpes Simplex Virus):** Causes vesicular lesions (cold sores or genital herpes) and encephalitis, not papillomatous growths. **High-Yield Clinical Pearls for NEET-PG:** * **Most common site:** True vocal cords (transition zone between squamous and ciliated epithelium). * **Triad of Symptoms:** Hoarseness of voice, stridor, and respiratory distress. * **Treatment of Choice:** CO2 Laser excision or Microdebridement. * **Adjuvant Therapy:** Cidofovir (antiviral) is often used in recalcitrant cases. * **Malignant Transformation:** Rare, but if it occurs (usually to Squamous Cell Carcinoma), it is often associated with **HPV types 16 and 18**.

Q: A patient with oral cancer has an ipsilateral lymph node measuring 2 cm, single in number with capsular spread. According to TNM staging, what is this classified as?

N3. ### Explanation The correct answer is **N3** (specifically **N3a** or **N3b** depending on the presence of Extranodal Extension). #### 1. Why N3 is Correct According to the **AJCC 8th Edition** for Oral Cavity Cancers, the staging of cervical lymph nodes has been updated to include **Extranodal Extension (ENE)**, also known as capsular spread. * **Clinical N3b:** Defined as a single or multiple nodes with **clinically positive ENE**. * **Pathological N3b:** Defined as a single or multiple nodes with **pathologically proven ENE**. Even though the node is single and only 2 cm (which would traditionally be N1), the presence of **capsular spread (ENE)** automatically upgrades the stage to **N3b**. ENE is a significant prognostic factor indicating a higher risk of regional recurrence and distant metastasis. #### 2. Why Other Options are Wrong * **Nx:** This is used when regional lymph nodes cannot be assessed. In this case, the node has been measured and evaluated. * **N1:** This is a single ipsilateral node $\leq$ 3 cm **without** extranodal extension. * **N2:** This category includes nodes between 3–6 cm, or multiple nodes, but specifically **without** extranodal extension. #### 3. High-Yield Clinical Pearls for NEET-PG * **ENE Definition:** Extension of tumor through the lymph node capsule into the surrounding connective tissue. * **AJCC 7th vs 8th Edition:** The most critical change in the 8th edition for Head and Neck cancers is the incorporation of **ENE** into N-staging and **Depth of Invasion (DOI)** into T-staging. * **N3a:** A node > 6 cm without ENE. * **N3b:** Any node (regardless of size or number) with ENE. * **Management:** The presence of ENE is an absolute indication for **adjuvant chemoradiotherapy** post-surgery.

Question 1

What is the mechanical advantage for a straight elevator?

Accepted Answer

3

Answer

2.5

Answer

4.6

Answer

2

Question 2

Injury to the auriculotemporal nerve during parotid tumour removal can result in which of the following?

Accepted Answer

Gustatory sweating

Answer

Facial paralysis

Answer

Trigeminal neuralgia

Answer

Orolingual paraesthesia

Question 3

All of the following are approaches to the Temporomandibular joint, except?

Accepted Answer

Gillie's temporal approach

Answer

Hind's retromandibular approach

Answer

Alkayat-Bramley preauricular incision

Answer

Endaural approach

Question 4

What is the most common cause of TMJ ankylosis?

Accepted Answer

Trauma

Answer

Osteoarthritis

Answer

Childhood illness

Answer

Rheumatoid arthritis

Question 5

What is the primary causative factor for myofascial pain dysfunction syndrome of the temporomandibular joint (TMJ)?

Accepted Answer

Muscular overextension and overcontraction

Answer

Infratemporal space infection

Answer

Auriculotemporal neuritis

Answer

Otitis media

Question 6

A 65-year-old smoker presents with hoarseness, hemoptysis, and a hard painless lump in the left supraclavicular fossa. What is the most appropriate next diagnostic step?

Accepted Answer

Open biopsy of the neck lump

Answer

Radical neck dissection

Answer

Fine needle aspiration cytology

Answer

Trial of anti-tuberculous therapy

Question 7

What is the most common site of squamous cell carcinoma?

Accepted Answer

Tongue

Answer

Floor of the mouth

Answer

Buccal mucosa

Answer

Lip

Question 8

What is the commonest treatment for a Branchial cyst?

Accepted Answer

Excision

Answer

Cystectomy

Answer

Aspiration

Answer

No treatment

Question 9

Laryngeal Papillomatosis is caused by which virus?

Accepted Answer

Human Papillomavirus (HPV)

Answer

Epstein-Barr Virus (EBV)

Answer

Cytomegalovirus (CMV)

Answer

Herpes Simplex Virus (HSV)

Question 10

A patient with oral cancer has an ipsilateral lymph node measuring 2 cm, single in number with capsular spread. According to TNM staging, what is this classified as?

Accepted Answer

N3

Answer

Nx

Answer

N1

Answer

N2

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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