Head and Neck Surgery Practice Questions

Q: Acinic cell tumor is a tumor of which gland?

Parotid gland. **Explanation:** **Acinic Cell Carcinoma (ACC)** is a low-grade malignant salivary gland tumor. It is unique because its cells demonstrate serous acinar differentiation, characterized by cytoplasmic zymogen-type granules. 1. **Why Parotid Gland is correct:** The **Parotid gland** is the most common site for Acinic cell tumors, accounting for approximately **80% of cases**. It is the second most common malignant salivary gland tumor in children (after Mucoepidermoid carcinoma) and the third most common overall in adults. It often presents as a slow-growing, painless swelling, frequently mimicking a benign pleomorphic adenoma. 2. **Why other options are incorrect:** * **Breast:** While the breast contains glandular tissue, primary acinic cell tumors are extremely rare here; the most common malignancies are Ductal or Lobular carcinomas. * **Parathyroid:** Tumors here are typically Adenomas or Hyperplasia, involving chief cells or oxyphil cells, not acinar cells. * **Thyroid:** Thyroid malignancies arise from follicular cells (Papillary/Follicular CA) or parafollicular C-cells (Medullary CA), which do not have acinar morphology. **High-Yield Clinical Pearls for NEET-PG:** * **Bilateralism:** Acinic cell tumor is the **most common malignant** salivary tumor to present **bilaterally** (though Warthin’s tumor is the most common benign bilateral tumor). * **Histology:** Look for "clear cells" or "blue dots" (zymogen granules) on PAS stain. * **Prognosis:** It generally has a favorable prognosis compared to other salivary malignancies, but it can recur or metastasize years after initial treatment. * **Treatment:** Wide local excision is the mainstay of management.

Q: Carnoy's solution is used in the treatment of which of the following conditions?

Odontogenic keratocyst. **Explanation:** **Carnoy’s solution** is a potent chemical cauterizing agent used as an adjuvant therapy in the surgical management of **Odontogenic Keratocysts (OKC)**. OKCs are known for their aggressive behavior and high recurrence rates (up to 30-60% with simple enucleation) due to the presence of "daughter cysts" or "satellite cysts" in the bony wall. 1. **Why Option A is Correct:** After the surgical enucleation of an OKC, Carnoy’s solution is applied to the bony cavity for 3–5 minutes. It penetrates the bone to a depth of approximately 1.5 mm, effectively killing any remaining epithelial remnants or satellite cysts, thereby significantly reducing the risk of recurrence. 2. **Why Other Options are Incorrect:** * **Ameloblastoma (Option B):** While aggressive, the standard of care is wide surgical resection (segmental or marginal) with 1–1.5 cm margins. Carnoy’s is occasionally used for the unicystic variant, but it is classically associated with OKC in exams. * **Dentigerous Cyst (Option C):** These are developmental cysts associated with the crown of an unerupted tooth. They have low recurrence rates and are successfully treated by simple enucleation without the need for chemical cautery. * **Mucocele (Option D):** These are minor salivary gland lesions (mucus extravasation) treated by simple excision of the gland; chemical cautery is not indicated. **High-Yield Clinical Pearls for NEET-PG:** * **Composition of Carnoy’s Solution:** Absolute alcohol (6ml), Chloroform (3ml), Glacial acetic acid (1ml), and Ferric chloride (1g). * **Modified Carnoy’s:** Due to the carcinogenic potential of Chloroform, it is often omitted in modern practice. * **Complication:** Care must be taken to avoid contact with the **inferior alveolar nerve**, as it can cause permanent paresthesia. * **OKC Association:** Frequently associated with **Gorlin-Goltz Syndrome** (Nevoid Basal Cell Carcinoma Syndrome).

Q: What is the most common site for a thyroglossal cyst?

Subhyoid region. ### Explanation **1. Why Subhyoid is Correct:** The thyroglossal duct cyst (TGDC) is the most common congenital neck swelling. It develops from a persistent remnant of the thyroglossal duct, which marks the descent of the thyroid gland from the foramen caecum to its final pre-tracheal position. While a cyst can form anywhere along this tract, the **subhyoid region** (just below the hyoid bone) is the most common site, accounting for approximately **65-85%** of cases. This is primarily because the duct often forms a loop (the duct of Bochdalek) behind or through the hyoid bone, creating a site of anatomical stasis. **2. Analysis of Incorrect Options:** * **Suprahyoid region (A):** This is the second most common site (approx. 20-25%) but occurs less frequently than the subhyoid location. * **Foramen caecum (C):** This is the site of origin of the duct at the base of the tongue. Cysts here are rare (lingual thyroglossal cysts) and can cause airway obstruction or dysphagia. * **Anterior border of sternomastoid (D):** This is the classic location for a **Branchial Cyst** (specifically the second branchial cleft cyst), not a thyroglossal cyst. TGDCs are characteristically midline structures. **3. Clinical Pearls for NEET-PG:** * **Pathognomonic Sign:** The cyst moves upward on **protrusion of the tongue** (due to its attachment to the hyoid bone via the tract) and on deglutition (swallowing). * **Surgical Management:** The treatment of choice is the **Sistrunk Operation**. This involves excision of the cyst, the entire tract, and the **central part of the hyoid bone** to minimize the high risk of recurrence. * **Ectopic Thyroid:** Always perform an ultrasound before surgery to ensure the cyst is not the patient’s only functioning thyroid tissue. * **Malignancy:** Though rare (<1%), the most common cancer arising in a TGDC is **Papillary Thyroid Carcinoma**.

Q: Neurosurgical treatment of epilepsy usually involves removal of the epileptic focus from which lobe?

Temporal lobe. The **temporal lobe** is the most common site for medically refractory focal epilepsy in adults. The most frequent underlying pathology is **Mesial Temporal Sclerosis (MTS)**, which involves scarring and neuronal loss in the hippocampus [1]. Because temporal lobe epilepsy (TLE) often responds poorly to anti-epileptic drugs (AEDs) but shows high success rates with surgical intervention, it is the most frequent indication for neurosurgical procedures like **Anterior Temporal Lobectomy (ATL)** or Selective Amygdalohippocampectomy [1]. **Analysis of Options:** * **Frontal Lobe (Option A):** This is the second most common site for focal epilepsy. Frontal lobe seizures are characterized by motor manifestations and "hypermotor" activity, but they are less frequently amenable to surgery compared to TLE due to the proximity of the primary motor cortex. * **Occipital and Parietal Lobes (Options C & D):** These represent "posterior cortex epilepsies." They are significantly rarer than temporal or frontal lobe epilepsy and are often associated with structural lesions like tumors or cortical dysplasias. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard Surgery:** Anterior Temporal Lobectomy is the most successful surgical procedure for epilepsy, with ~70-80% of patients becoming seizure-free [1]. * **Classic Presentation:** TLE often presents with **epigastric rising sensations** (aura), automatisms (lip-smacking), and post-ictal confusion [2]. * **Investigation of Choice:** **MRI Brain (Epilepsy Protocol)** is the most sensitive imaging modality to detect hippocampal atrophy/sclerosis [1]. * **Indication:** Surgery is considered "refractory" when a patient fails at least **two** appropriately chosen and tolerated AEDs [1].

Question 1

Acinic cell tumor is a tumor of which gland?

Accepted Answer

Parotid gland

Answer

Breast

Answer

Parathyroid

Answer

Thyroid

Question 2

A 80-year-old patient presents with a midline tumor of the lower jaw, involving the alveolar margin. The patient is edentulous. What is the recommended treatment?

Accepted Answer

Segmental mandibulectomy

Answer

Hemimandibulectomy

Answer

Commando operation

Answer

Marginal mandibulectomy

Question 3

What is the most common carcinoma of minor salivary glands?

Accepted Answer

Adenoid cystic carcinoma

Answer

Pleomorphic adenoma

Answer

Mucoepidermoid carcinoma

Answer

Warthin's tumor

Question 4

Intraoral vertical ramus osteotomy is done for which of the following conditions?

Accepted Answer

Mandibular setback

Answer

Anterior open bite

Answer

Mandibular advancement

Answer

Maxillary deformity

Question 5

A patient with T3N2AM0 lower alveolar carcinoma requires which of the following management options?

Accepted Answer

Surgery

Answer

Surgery + Radiotherapy

Answer

Radiotherapy

Answer

Chemotherapy

Question 6

A 5cm suspicious-looking lesion of the oral mucosa should be:

Accepted Answer

Incised and sent for biopsy

Answer

Excised and sent for biopsy

Answer

Irradiated

Answer

Offered palliative treatment

Question 7

Arthroscopy of the temporomandibular joint (TMJ) is useful in which of the following conditions?

Accepted Answer

Internal derangement

Answer

Fracture of condyle

Answer

Ankylosis

Answer

Hyperplasia

Question 8

Carnoy's solution is used in the treatment of which of the following conditions?

Accepted Answer

Odontogenic keratocyst

Answer

Ameloblastoma

Answer

Dentigerous cyst

Answer

Mucocele

Question 9

What is the most common site for a thyroglossal cyst?

Accepted Answer

Subhyoid region

Answer

Suprahyoid region

Answer

Foramen caecum

Answer

Anterior border of sternomastoid muscle

Question 10

Neurosurgical treatment of epilepsy usually involves removal of the epileptic focus from which lobe?

Accepted Answer

Temporal lobe

Answer

Frontal lobe

Answer

Occipital lobe

Answer

Parietal lobe

Head and Neck Surgery — MCQs

Head and Neck Surgery — MCQs

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