Anatomy
1 questionsWhich muscle is innervated by the Abducens nerve?
FMGE 2024 - Anatomy FMGE Practice Questions and MCQs
Question 61: Which muscle is innervated by the Abducens nerve?
- A. Medial rectus
- B. Lateral rectus (Correct Answer)
- C. Inferior oblique
- D. Superior oblique
Explanation: ***Lateral rectus***- The **Abducens nerve (CN VI)** specifically innervates only the **lateral rectus muscle** [1].- This muscle is responsible for moving the eyeball **laterally**, a movement known as **abduction** [1].*Medial rectus*- This muscle is innervated by the **Oculomotor nerve (CN III)**, not the Abducens nerve [1].- The primary action of the medial rectus is **adduction** (moving the eye medially) [1].*Superior oblique*- This muscle is innervated by the **Trochlear nerve (CN IV)**, which is unique among cranial nerves.- Its primary functions are **intorsion** (internal rotation) and **depression** of the eye.*Inferior oblique*- This muscle is innervated by the **Oculomotor nerve (CN III)**, along with the other recti (except lateral) and the levator palpebrae superioris.- Its main actions are **extorsion** (external rotation) and **elevation** of the eye [1].
Biochemistry
1 questionsWhich substance is involved in the conjugation process in the liver?
FMGE 2024 - Biochemistry FMGE Practice Questions and MCQs
Question 61: Which substance is involved in the conjugation process in the liver?
- A. Gluconic Acid
- B. Hyaluronic Acid
- C. Glucuronic Acid (Correct Answer)
- D. Glycolic Acid
Explanation: ***Glucuronic Acid***- The conjugation process is a Phase II detoxification reaction in the liver that increases the compound's polarity and water solubility for excretion.- **Glucuronidation**, catalyzed by **UDP-glucuronosyltransferases (UGT)**, is the most common and critical conjugation pathway, where substrates (like **bilirubin** and drugs) are linked to **glucuronic acid** (provided by UDP-glucuronic acid).*Hyaluronic Acid*- This acid is a large, non-sulfated **glycosaminoglycan** and a primary component of the **extracellular matrix** and **synovial fluid**.- It functions mainly in tissue structure, hydration, and lubrication, not as a conjugating molecule in liver metabolism.*Gluconic Acid*- This is an oxidation product of **glucose**, often used in food and pharmaceutical industries (e.g., as a salt like ferrous gluconate).- While structurally related to glucose metabolites, it is **glucuronic acid**, not gluconic acid, that is utilized for Phase II **conjugation**.*Glycolic Acid*- This substance is the smallest **alpha-hydroxy acid (AHA)** and is widely known for its use as a chemical exfoliator in dermatology.- Although it is an endogenous metabolite, it is not involved in the major Phase II conjugation reactions in the liver; these reactions primarily utilize **glucuronic acid**, sulfate, or glutathione.
Dermatology
2 questionsWhich of the following deficiencies causes follicular hyperkeratosis?
A 45-year-old patient presents with itchy, flat-topped, polygonal, violaceous papules on the inner wrists and flexors surfaces of the forearms. The lesions have a characteristic shiny surface and are arranged in a linear pattern. The patient denies any recent medication changes. What is the treatment?
FMGE 2024 - Dermatology FMGE Practice Questions and MCQs
Question 61: Which of the following deficiencies causes follicular hyperkeratosis?
- A. Vitamin C
- B. Vitamin E
- C. Vitamin B6
- D. Vitamin A (Correct Answer)
Explanation: ***Vitamin A***- Deficiency in Vitamin A (retinol) impairs the differentiation of **keratinizing epithelia**, leading to **squamous metaplasia**.- This results in **follicular hyperkeratosis** (also known as **phrynoderma** or 'toad skin'), where keratin plugs block the hair follicles, giving the skin a rough, bumpy appearance.*Vitamin C*- Deficiency causes **scurvy**, primarily due to defective collagen synthesis, leading to fragile blood vessels.- The characteristic skin finding is **perifollicular hemorrhage** (petechiae around hair follicles) and **painless gum bleeding**, not hyperkeratosis due to keratin plugging.*Vitamin E*- This deficiency primarily acts as an **antioxidant deficiency**, leading to increased susceptibility of cell membranes to oxidative damage.- Clinical manifestations often include **hemolytic anemia** (due to erythrocyte membrane damage) and **neurological symptoms** (e.g., ataxia, peripheral neuropathy).*Vitamin B6*- Deficiency of pyridoxine is often associated with cutaneous symptoms like a **seborrheic dermatitis-like rash** and **cheilosis** (cracked lips).- It is crucial for coenzyme functions but does not directly cause the severe keratin plugging characterized by widespread follicular hyperkeratosis.
Question 62: A 45-year-old patient presents with itchy, flat-topped, polygonal, violaceous papules on the inner wrists and flexors surfaces of the forearms. The lesions have a characteristic shiny surface and are arranged in a linear pattern. The patient denies any recent medication changes. What is the treatment?
- A. Anti-fungal
- B. Topical steroids (Correct Answer)
- C. Antibiotics
- D. Immunosuppressants
Explanation: ***Topical steroids***- **Lichen planus** is an inflammatory, immune-mediated disorder, and high-potency **topical corticosteroids** are the first-line treatment for localized cutaneous disease on flexural surfaces.- They reduce the inflammation (T-cell-mediated injury to the **basal layer** of the epidermis) and effectively alleviate symptoms like intense **pruritus** (itching).*Antibiotics*- Lichen planus is a **sterile inflammatory process**, not caused by a bacterial infection, making antibiotics ineffective for treating the underlying pathology.- Antibiotics are reserved for infectious conditions like cellulitis or **secondary bacterial infection** of the lesions, which is not indicated here.*Immunosuppressants*- Systemic **immunosuppressants** (e.g., methotrexate, cyclosporine) are reserved for severe, widespread, or treatment-refractory cases, or extensive subtypes like **erosive oral lichen planus**.- For localized cutaneous disease, the risk profile of systemic immunosuppression does not justify its use over topical therapy.*Anti-fungal*- Anti-fungal agents are used to treat infections caused by fungi, such as **Tinea corporis** (ringworm), which presents with scaly, erythematous plaques, not flat-topped violaceous papules.- Lichen planus is an autoimmune/inflammatory dermatosis; therefore, anti-fungals have no role in its primary management.
ENT
2 questionsA 50-year-old male presents with right-sided serous otitis media and a history of cervical lymphadenopathy. The probable diagnosis is?
A 22-year-old male with recurrent bleeding, presents with bowing of posterior maxillary wall on CECT. All are false except?
FMGE 2024 - ENT FMGE Practice Questions and MCQs
Question 61: A 50-year-old male presents with right-sided serous otitis media and a history of cervical lymphadenopathy. The probable diagnosis is?
- A. Tonsillar abscess
- B. Nasopharyngeal cancer (Correct Answer)
- C. Angiofibroma
- D. Adenoid hypertrophy
Explanation: ***Nasopharyngeal cancer***- Presents classically with the triad of **nasal obstruction/epistaxis**, **unilateral serous otitis media** (due to **Eustachian tube obstruction** by the tumor), and **cervical lymphadenopathy** (often metastatic).- The patient's presentation (adult age, unilateral SOM, and history of metastatic lymphadenopathy) is highly suggestive of this malignancy. *Angiofibroma*- This is a highly **vascular benign tumor** almost exclusively found in **adolescent males**, which contradicts the patient's age (50).- Primary symptoms are severe, recurrent **epistaxis** and nasal obstruction, rather than chronic serous otitis media as the dominant feature. *Adenoid hypertrophy*- While it commonly causes serous otitis media by blocking the **Eustachian tube opening**, it is a disease of **children** and is extremely rare to present *de novo* in a 50-year-old adult.- It typically causes **bilateral symptoms** (SOM, snoring) and is not associated with regional metastatic **cervical lymphadenopathy** in this age group. *Tonsillar abscess*- Symptoms typically include severe **sore throat**, **trismus** (difficulty opening the mouth), and a **"hot-potato" voice**, indicating an acute infection.- This is an acute condition that does not typically cause chronic unilateral serous otitis media as its primary or only otologic manifestation.
Question 62: A 22-year-old male with recurrent bleeding, presents with bowing of posterior maxillary wall on CECT. All are false except?
- A. Outgrown the blood supply
- B. It lacks capsule
- C. Tumor vessels lack contractility (Correct Answer)
- D. Bleeding is from the adjacent invading blood vessels
Explanation: ***Tumor vessels lack contractility*** (CORRECT - Most relevant to bleeding) - **Juvenile Nasopharyngeal Angiofibroma** (JNA) consists of numerous thin-walled vessels that are **deficient in smooth muscle** (muscular coat). - This lack of normal vessel musculature prevents effective **vasoconstriction** and hemostasis after trauma or spontaneous rupture, leading to severe and recurrent **epistaxis**. - This is the **key pathological feature** explaining the recurrent bleeding in this patient. *Outgrown the blood supply* (FALSE) - JNA is highly **vascularized**, with profuse blood supply primarily from branches of the **external carotid artery** (maxillary artery, ascending pharyngeal artery). - The tumor has abundant, not inadequate, blood supply—hence the risk of massive hemorrhage during surgical excision. *Bleeding is from the adjacent invading blood vessels* (FALSE) - Bleeding is **intrinsic** to the tumor, emanating from the tumor's own abnormal, thin-walled sinusoidal vessels embedded within its fibrous stroma. - While JNA is locally invasive, the pathological hemorrhage originates from the **delicate tumor vasculature itself**, not from adjacent normal vessels. *It lacks capsule* (TRUE - But less relevant to bleeding) - JNA is indeed **non-encapsulated**, which contributes to its locally aggressive behavior, invasion of surrounding structures, and tendency to recur after incomplete excision. - However, this feature relates more to **local extension and recurrence** rather than the bleeding tendency, which is specifically due to the **non-contractile vessels**.
Forensic Medicine
1 questionsA person who was mentally unsound at the time of committing a crime is exempt from liability if they were unaware of the nature of their actions or its consequences. What is this principle called?
FMGE 2024 - Forensic Medicine FMGE Practice Questions and MCQs
Question 61: A person who was mentally unsound at the time of committing a crime is exempt from liability if they were unaware of the nature of their actions or its consequences. What is this principle called?
- A. Durham's rule
- B. Currens rule
- C. Irresistible impulse test
- D. McNaughton rule (Correct Answer)
Explanation: ***McNaughton rule (M'Naghten rule)*** - This is the **correct answer** as it establishes the legal test for insanity defense based on whether the accused was aware of the **nature and quality of the act** or knew it was **wrong** - Originated from the **1843 case of Daniel M'Naghten** in England and remains the most widely used insanity defense standard - Key principle: A person is not criminally responsible if, at the time of committing the act, they were **laboring under such a defect of reason from disease of the mind** as to not know the nature and quality of the act or that it was wrong - Applied in **India under Section 84 of the Indian Penal Code** *Durham's rule (Product test)* - This rule states that an accused is not criminally responsible if the unlawful act was the **"product of mental disease or defect"** - Much broader than M'Naghten rule - Used briefly in US courts but largely abandoned due to being too broad *Currens rule* - This test focuses on whether the defendant had the **capacity to conform their conduct** to the requirements of law - Emphasizes volitional control rather than cognitive understanding - Less commonly used standard *Irresistible impulse test* - This is a **supplementary test** that asks whether the defendant could **control their actions** even if they knew they were wrong - Addresses volitional incapacity rather than cognitive incapacity - Does not match the question's emphasis on "unaware of nature or consequences"
Internal Medicine
2 questionsWhat nutritional deficiency is commonly associated with a chronic alcoholic presenting with a pruritic, eczematous rash on the neck and dorsum of the hands?
Acute liver failure is a clinical feature of which of the following?
FMGE 2024 - Internal Medicine FMGE Practice Questions and MCQs
Question 61: What nutritional deficiency is commonly associated with a chronic alcoholic presenting with a pruritic, eczematous rash on the neck and dorsum of the hands?
- A. Vit D
- B. Vit C
- C. Vit B3 (Correct Answer)
- D. Vit B1
Explanation: ***Vit B3*** - This presentation is classic for **pellagra**, the syndrome caused by **niacin (Vitamin B3)** deficiency, characterized by the 3 Ds: **Dermatitis**, **Diarrhea**, and **Dementia** [1], [2]. - The described **pruritic, eczematous rash** on sun-exposed areas (neck, hands, often called Casal's necklace if circumferential on the neck) is the typical **photosensitive dermatitis** associated with pellagra [1], [2]. *Vit B1* - Deficiency in **thiamine (B1)** causes **Beriberi** or **Wernicke-Korsakoff syndrome**, which primarily affects the nervous and cardiovascular systems [3], [4]. - Clinical features include **ataxia**, **ophthalmoplegia**, and high-output heart failure, but not this characteristic eczematous rash [3], [4]. *Vit D* - Deficiency leads to defective bone mineralization, causing **Rickets** in children and **Osteomalacia** in adults (resulting in bone pain and fractures). - While common in alcoholics, **Vitamin D** deficiency is not the cause of the specific, widespread, photosensitive eczematous rash described. *Vit C* - **Ascorbic acid (Vitamin C)** deficiency causes **Scurvy**, which presents with symptoms related to impaired collagen synthesis. - Hallmark features include **gingival bleeding**, **perifollicular hemorrhages**, and **impaired wound healing**, without the specific photosensitive dermatitis seen in pellagra.
Question 62: Acute liver failure is a clinical feature of which of the following?
- A. C. Belladonna poisoning
- B. D. Morphine poisoning
- C. A. OP poisoning
- D. B. Amanita Phalloides poisoning (Correct Answer)
Explanation: Correct Option B: Amanita Phalloides poisoning - This is due to the presence of potent hepatotoxins, primarily **alpha-amanitin**, which severely damages hepatocytes by inhibiting **RNA polymerase II**. - Ingestion often leads to a delayed presentation of **fulminant hepatic failure** (acute liver failure), necessitating aggressive supportive care and often liver transplantation [1]. *Incorrect Option A: OP poisoning* - Organophosphate poisoning primarily causes a **cholinergic crisis** by inhibiting acetylcholinesterase, leading to massive accumulation of acetylcholine (e.g., SLUDGE syndrome) [2]. - While severe hypoxia or shock might secondarily damage the liver, **acute liver failure** is not the characteristic or primary toxicity of organophosphates [2]. *Incorrect Option C: Belladonna poisoning* - Belladonna contains **atropine** and other anticholinergic compounds, causing profound **anticholinergic syndrome** (e.g., delirium, mydriasis, tachycardia, urinary retention). - Hepatic necrosis or **acute liver failure** is not a feature of anticholinergic toxicity. *Incorrect Option D: Morphine poisoning* - Morphine, an opioid, causes toxicity characterized by the classic triad of **respiratory depression**, altered mental status, and **pinpoint pupils** (miosis). - Opioid toxicity is centered on the central nervous system and respiratory system; it does not directly cause primary **acute liver failure**.
Pediatrics
1 questionsA 7-year-old child of short stature presents with skin patches and learning difficulties. Diagnostic workup indicates a defect in DNA repair specifically related to double-strand breaks. What is the most likely diagnosis?
FMGE 2024 - Pediatrics FMGE Practice Questions and MCQs
Question 61: A 7-year-old child of short stature presents with skin patches and learning difficulties. Diagnostic workup indicates a defect in DNA repair specifically related to double-strand breaks. What is the most likely diagnosis?
- A. Bloom Syndrome (Correct Answer)
- B. Lynch Syndrome
- C. Xeroderma Pigmentosum
- D. Cockayne Syndrome
Explanation: ***Bloom Syndrome***- This condition is caused by a mutation in the **BLM gene**, which encodes a **RecQ helicase** necessary for homologous recombination repair (a mechanism for **double-strand break** repair), consistent with the clinical presentation.- Key clinical features include **short stature**, **telangiectatic erythema** (skin patches, especially on sun exposure), and intellectual disability/learning difficulties. *Xeroderma Pigmentosum*- This disease results from a defect in **Nucleotide Excision Repair (NER)**, crucial for repairing DNA damage caused by UV light (e.g., pyrimidine dimers), not primarily double-strand breaks.- Patients exhibit extreme **photosensitivity** and have a drastically increased risk of developing multiple skin cancers early in life.*Cockayne Syndrome*- Cockayne syndrome results from defects in genes like *ERCC8* or *ERCC6*, impairing **Transcription-Coupled Repair (TCR)**, a specific type of NER.- While it presents with short stature (often described as **cachectic dwarfism**) and neurological defects, the primary DNA defect is not in the repair of double-strand breaks but rather UV adducts in transcribed DNA.*Lynch Syndrome*- Also known as Hereditary Non-Polyposis Colorectal Cancer (HNPCC), this syndrome is caused by defects in **Mismatch Repair (MMR)** genes (e.g., *MLH1*, *MSH2*).- It primarily predisposes individuals to colorectal and endometrial cancers and is not typically associated with the features of short stature and specific DNA double-strand break repair defects seen in this child.