All Free Oral Pathology and Medicine MCQs with Answers

• A. Geographic tongue
• B. Median rhomboid glossitis
• C. Oral thrush
• D. Denture stomatitis

Explanation: Geographic tongue is an inflammatory, migratory depapillating condition and is not primarily a Candida infection.

• A. Botryomycosis
• B. Mucormycosis
• C. phytomycosis
• D. Coccidiomycosis

Explanation: Phycomycosis is an older, broad term for fungal infections caused by zygomycetes, especially mucormycosis.

• A. apthous ulcer
• B. herpetic stomatitis
• C. candidiasis
• D. syphilis

Explanation: An ID reaction is a distant hypersensitivity response to a fungal infection and may occur with candidiasis, producing lesions away from…

• A. Histoplasmosis
• B. Phycomycosis
• C. Actinomycosis
• D. Bleomycosis

Explanation: Darling disease is histoplasmosis, named after Samuel Darling, who identified its causative fungus.

• A. Coccidiomycosis
• B. Mucormycosis
• C. Aspergillosis
• D. Histoplasmosis

Explanation: Mucormycosis is strongly angioinvasive: its broad hyphae invade vessel walls, causing thrombosis, ischemia, and tissue necrosis.

• A. Cryptococcus neoformans
• B. Aspergillosis
• C. Mucor
• D. Coccidioides immitis

Explanation: Mucor shows broad, non-septate hyphae with irregular or near-right-angle branching, unlike Aspergillus, which has narrow septate hyphae…

• A. All of the above
• B. Subsidiary infections
• C. Subclinical infections
• D. Secondary infections

Explanation: Oral candidiasis is commonly classified as primary when confined to the mouth and secondary when it occurs as part of a systemic or…

• A. Cryptococcus
• B. Histoplasmosis
• C. Blastomycosis
• D. Paracoccidiomycosis

Explanation: Cryptococcus neoformans has a prominent gelatinous polysaccharide capsule that stains positively with mucicarmine.

• A. Acute pseudomembranous candidiasis
• B. Chronic hyperplastic candidiasis
• C. Chronic atrophic candidiasis
• D. Acute atrohpic candidiasis

Explanation: Chronic hyperplastic candidiasis produces persistent white plaques that may resemble leukoplakia and cannot be readily wiped away.

• A. Acute Pseudo Membranous
• B. Acute Atrophic
• C. Chronic Hyperplastic
• D. Chonic atrophic

Explanation: Denture-associated candidiasis is usually chronic atrophic candidiasis, also called denture stomatitis, presenting as erythema beneath the…

• A. median rhomboidal glossitis
• B. migrating geographic tongue
• C. Prolonged tetracycline therapy
• D. All of the above

Explanation: Candida is classically associated with median rhomboid glossitis, a depapillated erythematous area on the midline dorsum of the tongue.

• A. Clobetasol
• B. Miconazole
• C. Co-trimoxozle
• D. Penicillin

Explanation: Miconazole is an antifungal that inhibits fungal ergosterol synthesis and is commonly used for oral candidiasis.

• A. Mucor
• B. Treponema
• C. Candida
• D. Aspergillus

Explanation: A chronic fissure or ulcer at the mouth corner is angular cheilitis, in which Candida is a common cultured organism, often with local…

• A. Characteristic odour
• B. Response to injection of vitamin B12
• C. Demonstration of mycelia and spores in scrapping
• D. Demonstration of ray fungus in granules

Explanation: Candidiasis is supported by scraping the lesion and demonstrating Candida pseudohyphae or mycelia with spores, usually using a potassium…

• A. Erythroplakia
• B. Pemphigus vulagaris
• C. Leukoplakia
• D. Oral thrush

Explanation: Pseudomembranous candidiasis produces white plaques that can be wiped or peeled away, leaving a painful red or bleeding surface.

• A. Acute pseudomembranous candidiasis
• B. Acute atrophic candidiasis
• C. chronic atrophic candidiasis
• D. chronic hyperplastic candidiasis

Explanation: Thrush is the traditional name for acute pseudomembranous candidiasis, characterised by removable creamy-white plaques.

• A. histoplasmosis
• B. cryptococcosis
• C. candidiasis
• D. coccidiomycosis

Explanation: Pseudomycelium and chlamydospores in a mucosal scraping are characteristic microscopic forms of Candida.

• A. It can affect neonates in an epidemic fashion
• B. It is characterized by a plaque of proliferating epithelial and other cells
• C. It is a complication of immunosuppression or systemic diseases
• D. It is caused by a gram-negative fungus

Explanation: Candida is a fungus, not a gram-negative organism, so statement A is false.

• A. Phantoguesia
• B. Dysguesia
• C. Cocoguesia
• D. Ageusia

Explanation: Phantogeusia is the perception of taste without an external stimulus. Ageusia means complete loss of taste, while dysgeusia means an…

• A. Intrathecal
• B. Oral
• C. Subdermal
• D. Intravenous

Explanation: The oral route is preferred for chronic pain because it is convenient, non-invasive and allows sustained dosing.