Head and Neck Surgery Practice Questions

Q: Which of the following is NOT used for the diagnosis of a parotid tumor?

Open surgical biopsy. **Explanation:** The diagnosis of a parotid tumor relies on a combination of clinical examination, imaging, and cytology. **Open surgical biopsy (incisional biopsy) is strictly contraindicated** in the evaluation of parotid masses for two primary reasons: 1. **Tumor Seeding:** Most parotid tumors are Pleomorphic Adenomas. Breaking the tumor capsule during an open biopsy can lead to the spillage of mucoid material and tumor cells, resulting in a high rate of local recurrence (which is difficult to manage). 2. **Facial Nerve Injury:** An uncontrolled incision risks damaging the branches of the facial nerve, which traverses the gland. **Analysis of Other Options:** * **FNAC (Fine Needle Aspiration Cytology):** This is the gold standard initial investigation. It has high sensitivity and specificity for distinguishing benign from malignant lesions without the risk of seeding or nerve damage. * **MRI:** This is the preferred imaging modality for parotid tumors. It provides superior soft-tissue contrast, helping to delineate the tumor's relationship with the facial nerve, deep lobe involvement, and perineural spread. * **CT Scan:** Useful for evaluating bony involvement or in patients who cannot undergo MRI. It helps assess the extent of the tumor and regional lymphadenopathy. **High-Yield Clinical Pearls for NEET-PG:** * **Treatment of Choice:** For most parotid tumors, the definitive "biopsy" is actually a **Superficial Parotidectomy** (excision of the tumor with a cuff of normal tissue while preserving the facial nerve). * **Most Common Tumor:** Pleomorphic Adenoma (Benign Mixed Tumor). * **Warthin’s Tumor:** Often bilateral, associated with smoking, and shows "hot spots" on Technetium-99m pertechnetate scans. * **Malignancy Sign:** Facial nerve palsy in the presence of a parotid mass is a strong indicator of malignancy (most commonly Adenoid Cystic Carcinoma).

Q: A Bristow elevator is used for which of the following procedures?

Elevating a fractured zygomatic bone.. The **Bristow elevator** is a specialized surgical instrument primarily used in maxillofacial surgery for the **reduction of zygomatic bone fractures** (specifically zygomatic arch or malar complex fractures). ### Why Option B is Correct: The zygomatic bone is often displaced medially and inferiorly during trauma. The Bristow elevator is designed with a sturdy, slightly curved blade that allows the surgeon to apply significant leverage. In the **Gilles’ temporal approach**, a small incision is made in the temporal hairline; the elevator is then passed deep to the temporal fascia and superficial to the temporalis muscle to reach the medial surface of the zygomatic bone, "elevating" it back into its anatomical position. ### Why Other Options are Incorrect: * **Option A (Luxating teeth):** While elevators are used in dentistry (e.g., Coupland’s or Cryer’s elevators), the Bristow elevator is too large and lacks the specific tip geometry required for dental luxation. * **Option C (Reduction of nasal complex fracture):** Nasal fractures are typically reduced using instruments like the **Walsham’s forceps** (for the septum) or **Asch’s forceps** (for the nasal bones), which are designed to grasp and manipulate the thin nasal architecture. ### NEET-PG High-Yield Pearls: * **Gilles’ Approach:** The classic surgical approach for using a Bristow elevator to reduce a zygomatic arch fracture. * **Rowe’s Zygomatic Elevator:** Another common instrument used for the same purpose; it is often heavier and more robust than the Bristow. * **Key Landmark:** When using the Bristow elevator, the instrument must stay **deep to the deep temporal fascia** to avoid damaging the frontal branch of the facial nerve.

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).

Question 1

Which of the following is NOT used for the diagnosis of a parotid tumor?

Accepted Answer

Open surgical biopsy

Answer

MRI

Answer

CT

Answer

FNAC

Question 2

A Bristow elevator is used for which of the following procedures?

Accepted Answer

Elevating a fractured zygomatic bone.

Answer

Luxating teeth.

Answer

Reduction of a nasal complex fracture.

Answer

All of the above.

Question 3

What is the recommended treatment for a pleomorphic adenoma limited to the superficial lobe without facial nerve infiltration?

Accepted Answer

Superficial parotidectomy

Answer

Total parotidectomy

Answer

Parotidectomy followed by radiotherapy

Answer

Observation

Question 4

What is the mechanical advantage for a straight elevator?

Accepted Answer

3

Answer

2.5

Answer

4.6

Answer

2

Question 5

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 6

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 7

What is the most common cause of TMJ ankylosis?

Accepted Answer

Trauma

Answer

Osteoarthritis

Answer

Childhood illness

Answer

Rheumatoid arthritis

Question 8

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 9

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 10

What is the most common site of squamous cell carcinoma?

Accepted Answer

Tongue

Answer

Floor of the mouth

Answer

Buccal mucosa

Answer

Lip

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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