Xerostomia — MCQs
All are true about Sjogren syndrome except
"Xerostomia" is seen in all of the following EXCEPT in
Which of the following drugs is least likely to cause sicca syndrome?
In which of the following conditions oral screen should\nnot be used:
A patient with rheumatoid arthritis mentions to her physician that after many years without dental problems, she has recently had seven dental caries filled. This finding suggests that she should be evaluated for which of the following diseases?
A neonate with micrognathia has episodes of cyanosis. Best initial management is:
A 16-year-old patient complains of difficulty in swallowing, difficulty in talking and sometimes difficulty in breathing. On physical examination the presentation is similar to that shown in the picture. What would be the probable diagnosis?
Young's operation is done for:
Saroj, a 32-year-old female from a rural background, has a history of chronic tobacco chewing since 14 years of age. She now presents with difficulty in opening her mouth. On oral examination, no ulcers are seen. What is the most probable diagnosis?
What is the most common site of ectopic salivary gland?
Xerostomia Indian Medical PG Practice Questions and MCQs
Question 1: All are true about Sjogren syndrome except
- A. Xerostomia
- B. Lack of tear
- C. Interstitial nephritis
- D. Subcutaneous fibrosis (Correct Answer)
Explanation: ***Subcutaneous fibrosis*** - **Subcutaneous fibrosis** is typically associated with conditions like **systemic sclerosis** or **eosinophilic fasciitis**, not Sjögren's syndrome [2]. - Sjögren's syndrome primarily affects exocrine glands and other organ systems, but **fibrosis of subcutaneous tissue** is not a characteristic manifestation. *Xerostomia* - **Xerostomia**, or **dry mouth**, is a hallmark symptom of Sjögren's syndrome due to immune-mediated destruction of salivary glands. - This symptom can lead to dental caries, dysphagia, and difficulty speaking. *Lack of tear* - **Keratoconjunctivitis sicca**, or **dry eyes** (lack of tears), is another cardinal feature of Sjögren's syndrome, resulting from inflammation of the lacrimal glands [1]. - Patients often experience grittiness, foreign body sensation, and blurred vision due to insufficient tear production. *Interstitial nephritis* - **Interstitial nephritis** can occur in Sjögren's syndrome, particularly **tubulointerstitial nephritis**, which may lead to **renal tubular acidosis**. - Renal involvement, though less common than sicca symptoms, is a recognized extraglandular manifestation.
Question 2: "Xerostomia" is seen in all of the following EXCEPT in
- A. Anticholinergic drugs
- B. Oral sepsis (Correct Answer)
- C. Sjogren's syndrome
- D. Dehydration
Explanation: ***Oral sepsis*** - **Oral sepsis** typically involves infection and inflammation of the oral cavity and can lead to symptoms like pain, swelling, and pus formation, but it does not directly cause a decrease in saliva production, which is characteristic of xerostomia. - While oral sepsis can occur alongside or exacerbate other oral health issues, it is not a primary cause of **dry mouth** itself. *Anticholinergic drugs* - **Anticholinergic drugs** block the action of acetylcholine, which is a neurotransmitter involved in stimulating salivary glands. - This blockage leads to reduced saliva production, a common and well-known side effect that causes **xerostomia**. *Sjogren's syndrome* - **Sjögren's syndrome** is an autoimmune disease characterized by the immune system attacking moisture-producing glands, primarily the salivary and lacrimal (tear) glands. - This autoimmune destruction directly leads to chronic **xerostomia** (dry mouth) and dry eyes. *Dehydration* - **Dehydration** occurs when the body lacks sufficient fluid, which affects overall fluid balance, including saliva production. - Reduced fluid intake or excessive fluid loss directly decreases the volume of saliva produced, resulting in **dry mouth** or xerostomia.
Question 3: Which of the following drugs is least likely to cause sicca syndrome?
- A. Atropine
- B. Nicotine (Correct Answer)
- C. Olanzapine
- D. Clonidine
Explanation: ***Nicotine*** - **Nicotine** is a **nicotinic cholinergic receptor agonist** that acts primarily at autonomic ganglia and the neuromuscular junction. - Unlike antimuscarinic drugs, nicotine **does NOT block parasympathetic glandular secretion** and is **not associated with causing sicca syndrome**. - While nicotine has complex autonomic effects, it does **not significantly reduce salivary or lacrimal gland secretion**, making it the **least likely** among these options to cause sicca syndrome. - The question asks for the drug *least likely* to cause sicca syndrome, and nicotine's mechanism of action does not involve blocking secretory glands. *Atropine* - **Atropine** is a potent **muscarinic acetylcholine receptor antagonist** with strong anticholinergic effects. - It directly **blocks parasympathetic stimulation** of salivary and lacrimal glands, leading to marked reduction in secretions. - **Dry mouth (xerostomia) and dry eyes (xerophthalmia)** are classic and prominent side effects, making atropine one of the **most likely drugs to cause sicca syndrome**. *Olanzapine* - **Olanzapine** is an atypical antipsychotic with **moderate anticholinergic properties** due to muscarinic M1 receptor blockade. - **Dry mouth is a common side effect** occurring in 20-30% of patients taking olanzapine. - While less potent than atropine, olanzapine's anticholinergic effects make it **likely to contribute to sicca symptoms**. *Clonidine* - **Clonidine** is an **alpha-2 adrenergic agonist** that reduces sympathetic outflow centrally. - **Dry mouth (xerostomia)** is one of the **most common side effects** of clonidine, occurring in up to 40% of patients. - The mechanism involves decreased salivary gland secretion, making clonidine **highly likely to cause sicca syndrome symptoms**.
Question 4: In which of the following conditions oral screen should\nnot be used:
- A. Acute infection of tonsils and adenoids (Correct Answer)
- B. Tongue thrusting
- C. Thumb sucking
- D. Nail biting habit
Explanation: ***Acute infection of tonsils and adenoids*** - An oral screen **increases airflow restriction** and can exacerbate symptoms in patients with acute tonsil and adenoid infections. - Using an oral screen in this condition can lead to **discomfort**, **difficulty breathing**, and potentially worsen the inflammatory process. *Tongue thrusting* - Oral screens are often used as an **orthodontic appliance** to help modify or correct **tongue thrusting habits**, a parafunctional habit. - They act as a physical barrier to retrain tongue placement and swallowing patterns. *Thumb sucking* - **Oral screens** are a common appliance used to deter **thumb sucking habits** in children. - By creating a physical barrier, they help break the habit and prevent associated dental malocclusions. *Nail biting habit* - While other dental appliances might address nail biting, an **oral screen is not typically indicated** for this habit. - Nail biting is often managed through behavioral modification or other protective devices on the nails themselves.
Question 5: A patient with rheumatoid arthritis mentions to her physician that after many years without dental problems, she has recently had seven dental caries filled. This finding suggests that she should be evaluated for which of the following diseases?
- A. Sjogren's syndrome (Correct Answer)
- B. Polyarteritis nodosa
- C. Oral squamous cell carcinoma
- D. Systemic lupus erythematosus
Explanation: ***Sjogren's syndrome*** - Patients with **rheumatoid arthritis** have an increased risk of developing **secondary Sjogren's syndrome**, a chronic autoimmune disease. - The hallmark of Sjogren's syndrome is **xerostomia** (dry mouth) due to decreased salivary gland function, leading to a higher incidence of dental caries. *Polyarteritis nodosa* - This is a **necrotizing vasculitis** primarily affecting medium-sized arteries, often associated with **hepatitis B**. - It typically presents with **systemic symptoms**, skin lesions, neuropathy, hypertension, and kidney involvement, not primarily increased dental caries. *Oral squamous cell carcinoma* - It is a **malignant tumor** of the oral cavity, which can be associated with tobacco and alcohol use. - While it can cause oral discomfort and lesions, it does not directly lead to a sudden increase in **dental caries** as its primary manifestation. *Systemic lupus erythematosus* - While **rheumatoid arthritis** and **lupus** are both autoimmune diseases, **systemic lupus erythematosus** itself does not directly cause an increased incidence of dental caries. - Lupus is a multisystem autoimmune disease that can affect virtually any organ system and has a wide range of manifestations, but **dry mouth** leading to caries is more characteristic of Sjogren's syndrome.
Question 6: A neonate with micrognathia has episodes of cyanosis. Best initial management is:
- A. Prone positioning (Correct Answer)
- B. Tracheostomy
- C. Tongue-lip adhesion
- D. CPAP
Explanation: ***Prone positioning*** - Placing the neonate in the **prone position** allows the tongue to fall forward by gravity, thereby relieving airway obstruction caused by **micrognathia**. - This is a simple, non-invasive, and often effective initial management strategy for improving breathing during feeding in infants with **Pierre Robin sequence**. *Tracheostomy* - **Tracheostomy** is an invasive surgical procedure reserved for severe, persistent airway obstruction unresponsive to less invasive measures. - It carries significant risks and complications and is not the initial best management given the efficacy of prone positioning for many cases of **micrognathia**. *Tongue-lip adhesion* - **Tongue-lip adhesion** is a surgical procedure where the tongue is sutured to the lower lip to pull it forward, preventing obstruction. - While it can be effective for severe cases, it is a surgical intervention and generally considered after less invasive measures like prone positioning have failed or if obstruction is severe. *CPAP* - **Continuous Positive Airway Pressure (CPAP)** can help maintain an open airway by delivering positive pressure, but it can be challenging to administer effectively in neonates with **micrognathia** during feeding. - It might be used for respiratory support during sleep or sustained obstruction, but **prone positioning** is usually the first line for feeding-related cyanosis due to mild-to-moderate airway obstruction.
Question 7: A 16-year-old patient complains of difficulty in swallowing, difficulty in talking and sometimes difficulty in breathing. On physical examination the presentation is similar to that shown in the picture. What would be the probable diagnosis?
- A. Ranula
- B. Lingual thyroid (Correct Answer)
- C. Enlarged adenoids
- D. Vallecular cyst
Explanation: ***Lingual thyroid*** - The image shows a **mass at the base of the tongue**, which is typical of a lingual thyroid, an ectopic thyroid tissue. - Symptoms like **difficulty swallowing (dysphagia)**, **difficulty talking (dysphonia)**, and **difficulty breathing (dyspnea)** are common with a lingual thyroid due to its obstructive nature. - Lingual thyroid results from **failure of thyroid descent** during embryological development and is the most common ectopic thyroid location. *Ranula* - A ranula is a **mucus extravasation cyst** found on the **floor of the mouth**, usually unilateral and bluish. - While it can cause speech or swallowing difficulties, its location is distinct from the mass seen at the tongue base. *Vallecular cyst* - A vallecular cyst is a **mucus retention cyst** located in the **vallecula** (between the base of tongue and epiglottis). - Can present with dysphagia and respiratory symptoms, but typically appears more **cystic and translucent** rather than solid tissue mass. - Less common in adolescents compared to lingual thyroid. *Enlarged adenoids* - Enlarged adenoids are located in the **nasopharynx** and typically cause nasal obstruction, mouth breathing, and recurrent ear infections. - They would not present as a visible mass at the base of the tongue nor cause dysphagia or dysphonia to this extent.
Question 8: Young's operation is done for:
- A. Allergic rhinitis
- B. Vasomotor rhinitis
- C. Atrophic rhinitis (Correct Answer)
- D. Antrochoanal polyp
Explanation: ***Atrophic rhinitis*** - **Young's operation** is a surgical procedure specifically designed to treat **atrophic rhinitis**. - The goal of the surgery is to narrow the nasal passages by creating a **synechia** (adhesion) to reduce airflow and improve the humidification and temperature of inspired air. *Allergic rhinitis* - Allergic rhinitis is primarily managed with **medical therapy**, including antihistamines, nasal corticosteroids, and allergen avoidance. - Surgical intervention, if considered, typically involves procedures like turbinate reduction, not Young's operation, and is less common for this condition. *Vasomotor rhinitis* - Vasomotor rhinitis is a **non-allergic, non-infectious condition** characterized by fluctuating nasal congestion and rhinorrhea, often triggered by irritants or temperature changes. - Treatment usually involves **medical management** with anticholinergics or nasal corticosteroids, and sometimes turbinate reduction, but not Young's operation. *Antrochoanal polyp* - An antrochoanal polyp is a benign growth originating in the **maxillary sinus** and extending into the choana. - The primary treatment is **surgical removal**, typically via endoscopic sinus surgery, which is distinct from Young's operation.
Question 9: Saroj, a 32-year-old female from a rural background, has a history of chronic tobacco chewing since 14 years of age. She now presents with difficulty in opening her mouth. On oral examination, no ulcers are seen. What is the most probable diagnosis?
- A. Submucous oral fibrosis (Correct Answer)
- B. Carcinoma of buccal mucosa
- C. TM joint arthritis
- D. Trigeminal nerve paralysis
Explanation: **Explanation:** The clinical presentation of a young patient with a long-standing history of tobacco/areca nut chewing presenting with progressive difficulty in opening the mouth (trismus) is a classic description of **Oral Submucous Fibrosis (OSMF)**. **1. Why the correct answer is right:** OSMF is a chronic, insidious, premalignant condition characterized by juxta-epithelial inflammatory reaction followed by **progressive fibrosis of the lamina propria and deeper connective tissues**. The alkaloids in areca nut (e.g., arecoline) stimulate fibroblasts to produce excessive collagen, while flavonoids inhibit collagenase. This leads to the formation of palpable vertical fibrous bands, particularly in the buccal mucosa, resulting in restricted mouth opening (trismus) and a "burning sensation" when eating spicy food. The absence of ulcers in this case further supports a fibrotic rather than an ulcerative/malignant process. **2. Why the incorrect options are wrong:** * **Carcinoma of buccal mucosa:** While tobacco is a risk factor, malignancy typically presents with a non-healing ulcer, proliferative growth, or induration, rather than isolated trismus without a visible lesion. * **TM joint arthritis:** This would present with joint pain, clicking sounds, and tenderness over the pre-auricular area, usually unrelated to tobacco chewing. * **Trigeminal nerve paralysis:** This would result in sensory loss or weakness of the muscles of mastication (motor V3), but not mechanical restriction due to fibrosis. **High-Yield Clinical Pearls for NEET-PG:** * **Etiology:** Areca nut (betel nut) is the primary causative agent. * **Clinical Sign:** "Hockey-stick" appearance of the uvula and restricted tongue protrusion due to fibrosis. * **Pre-malignant potential:** OSMF has a high malignant transformation rate (approx. 7–13%). * **Management:** Cessation of habit, intralesional steroids (to reduce inflammation), and hyaluronidase (to break down collagen). Surgical release is reserved for severe cases.
Question 10: What is the most common site of ectopic salivary gland?
- A. Cheek
- B. Palate
- C. Angle of mandible (Correct Answer)
- D. Tongue
Explanation: **Explanation:** The correct answer is **Angle of mandible (Option C)**. This refers to a specific clinical entity known as a **Stafne’s Bone Cavity** (or Static Bone Cyst). **Why it is correct:** Ectopic salivary gland tissue (also called salivary gland choristoma) refers to normal salivary tissue found in an abnormal anatomical location. The most frequent site is the **mandible**, specifically near the angle, below the inferior alveolar canal. This occurs when a portion of the submandibular gland becomes entrapped during the ossification of the mandible. On a radiograph, this appears as a well-defined, asymptomatic radiolucency near the angle of the jaw. **Analysis of incorrect options:** * **A. Cheek:** While ectopic tissue can occur in the buccal mucosa, it is significantly less common than the mandibular site. * **B. Palate:** The palate is the most common site for **minor salivary gland tumors** (specifically Pleomorphic Adenoma), but it is not the most common site for *ectopic* (choristomatous) tissue. * **D. Tongue:** Ectopic salivary tissue can be found at the base of the tongue (near the lingual tonsils), but this is a rare occurrence compared to the mandibular angle. **High-Yield Clinical Pearls for NEET-PG:** * **Stafne’s Cyst:** It is not a true cyst (no epithelial lining); it is a developmental depression containing ectopic submandibular gland tissue. * **Most common site for Minor Salivary Glands:** Palate. * **Most common site for Sialolithiasis (Stones):** Submandibular gland (Wharton’s duct) due to alkaline pH and high calcium/mucin content. * **Most common Salivary Gland Tumor:** Pleomorphic Adenoma (most common site: Parotid).
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