FMGE 2019 - Dental PYQs Practice Questions

Q: What is the most common oral cancer?

Squamous cell ca. ***Squamous cell ca*** - **Squamous cell carcinoma (SCC)** accounts for over **90% of all oral cancers**, making it the most prevalent type. - It arises from the **stratified squamous epithelium** lining the oral cavity. *Transition cell ca* - This term is more commonly associated with tumors of the **urinary tract**, such as transitional cell carcinoma of the bladder. - **Transitional cell carcinomas** are not typically found in the oral cavity. *Mucoepidermoid* - **Mucoepidermoid carcinoma** is the most common primary malignant tumor of **salivary glands**, not the oral cavity lining. - While salivary glands are in the oral region, this type of cancer originates specifically from these glands. *Adenocarcinoma* - **Adenocarcinoma** originates from **glandular tissue** and represents a small percentage of oral cancers. - It is much **less common** than squamous cell carcinoma in the oral cavity. [Practice more Dental PYQs on OnCourse]

Q: A patient who recently got a denture fitted is found to have oral thrush that bleeds on scraping. What is the causative agent for this condition?

Candida. ***Candida*** - **Oral thrush** (candidiasis) is a common opportunistic fungal infection, especially in individuals with **dentures**, which create a warm, moist environment conducive to candidal growth. - The characteristic presentation includes **white patches** on the oral mucosa that, when scraped, reveal an **erythematous** (red) or **bleeding** surface. *Diphtheria* - Diphtheria causes a **pseudomembrane** in the throat that is tough, grayish, and hard to remove, but it's not typically associated with denture use or easy bleeding on scraping. - It is caused by the bacterium *Corynebacterium diphtheriae* and is accompanied by **severe systemic toxicity**, unlike the localized oral thrush. *Staph Aureus* - *Staphylococcus aureus* can cause various infections, but it is not typically associated with the characteristic **white, easily scrapable lesions** of oral thrush. - Oral *Staph aureus* infections might present as **impetigo** periorally or **abscesses**, neither of which fits the clinical description. *Strep Mutans* - *Streptococcus mutans* is primarily known for its role in **dental caries** (cavities) due to acid production from sugar fermentation. - It is not the causative agent for **oral thrush** or the described white, bleeding lesions on scraping. [Practice more Dental PYQs on OnCourse]

Question 1

What is the most common oral cancer?

Accepted Answer

Squamous cell ca

Answer

Transition cell ca

Answer

Mucoepidermoid

Answer

Adenocarcinoma

Question 2

A patient who recently got a denture fitted is found to have oral thrush that bleeds on scraping. What is the causative agent for this condition?

Accepted Answer

Candida

Answer

Diphtheria

Answer

Staph Aureus

Answer

Strep Mutans

FMGE 2019 — Dental