Anatomy
1 questionsWhat is the most common type of ventricular septal defect?
FMGE 2025 - Anatomy FMGE Practice Questions and MCQs
Question 151: What is the most common type of ventricular septal defect?
- A. Incomplete fusion of the septum
- B. Non-development of the perimembranous part of the septum
- C. Muscular defect
- D. Membranous defect (Correct Answer)
Explanation: ***Membranous defect***- This type of defect, also known as **perimembranous VSD**, is the most common form, accounting for approximately 70-80% of all ventricular septal defects [1].- It is located just below the aortic valve, involving the **proximal third** of the septum and is defined by its relationship to the fibrous trigones [1].*Muscular defect*- **Muscular VSDs** (or trabecular VSDs) are less common than membranous defects and can be found anywhere within the thick muscular portion of the septum.- These defects often have a higher rate of **spontaneous closure**, especially the small, multiple defects referred to as 'Swiss cheese' VSDs.*Non-development of the perimembranous part of the septum*- While the failure of complete septation of the **membranous portion** is the underlying embryological cause, the specific anatomical diagnosis defining the common VSD type is the *membranous defect*. - This phrasing is descriptive of the etiology but **membranous defect** identifies the most common resulting structure.*Incomplete fusion of the septum*- This is a generic description of the mechanism leading to VSD development (failure of the septal components to fuse correctly), but it does not specify the **most common anatomical location**.- The most critical and common fusion failure involves the development of the **membranous septum**, which results in the named *membranous defect*.
Anesthesiology
2 questionsA patient undergoing surgery is administered succinylcholine for muscle relaxation. Shortly after administration, he develops hyperthermia, muscle rigidity, tremors, and tachycardia. What is the most appropriate treatment for this condition?
A patient scheduled for elective hip surgery is currently taking aspirin, enalapril, a multivitamin, and metoprolol. The surgery is planned in 5 days. What is the appropriate perioperative management for this patient?
FMGE 2025 - Anesthesiology FMGE Practice Questions and MCQs
Question 151: A patient undergoing surgery is administered succinylcholine for muscle relaxation. Shortly after administration, he develops hyperthermia, muscle rigidity, tremors, and tachycardia. What is the most appropriate treatment for this condition?
- A. Neostigmine
- B. Midazolam
- C. Dantrolene sodium (Correct Answer)
- D. Atropine
Explanation: ***Dantrolene sodium***- This is the specific and definitive antidote for **Malignant Hyperthermia (MH)**, characterized by signs like hyperthermia, muscle rigidity, and tachycardia after succinylcholine administration.- **Dantrolene** works directly on skeletal muscle by inhibiting the release of calcium from the **sarcoplasmic reticulum**, thereby interrupting the sustained muscle contraction and hypermetabolic state.*Neostigmine*- It is an **acetylcholinesterase inhibitor** used to reverse the effects of non-depolarizing neuromuscular blocking agents (e.g., rocuronium).- It is **contraindicated** in MH as it could potentially exacerbate muscle rigidity and the hypermetabolic crisis by increasing **acetylcholine** activity at the neuromuscular junction.*Atropine*- This is an **anticholinergic** drug primarily used to treat bradycardia or to dry secretions.- Although the patient exhibits severe tachycardia, atropine does not treat the underlying pathological hypermetabolism or the excessive calcium release that defines MH.*Midazolam*- This is a **benzodiazepine** used for anxiolysis, sedation, and if necessary, managing seizures.- While supportive care for MH might involve benzodiazepines if seizures occur due to hyperthermia, it is not the crucial drug needed to counteract the life-threatening hypermetabolic crisis.
Question 152: A patient scheduled for elective hip surgery is currently taking aspirin, enalapril, a multivitamin, and metoprolol. The surgery is planned in 5 days. What is the appropriate perioperative management for this patient?
- A. Stop enalapril (Correct Answer)
- B. Stop aspirin to minimize perioperative bleeding risk
- C. Stop metoprolol to increase cardiac output
- D. Increase aspirin dosage for additional analgesic benefit
Explanation: ***Correct: Stop enalapril*** - **ACE inhibitors (enalapril) should be discontinued 24-48 hours before elective surgery** - Risk of **refractory intraoperative hypotension** during anesthesia induction, particularly with vasodilatory anesthetics - Associated with increased perioperative complications including hypotension requiring vasopressor support - Can be safely restarted postoperatively once hemodynamic stability is achieved *Incorrect: Stop aspirin to minimize perioperative bleeding risk* - **Aspirin should generally be continued** in patients with cardiovascular indications (CAD, stroke prevention) - Current guidelines recommend continuation for most surgeries except those with very high bleeding risk (neurosurgery, posterior chamber eye surgery) - **Hip surgery is NOT a contraindication** to aspirin continuation - The cardiovascular risk of stopping aspirin outweighs bleeding risk in most cases *Incorrect: Stop metoprolol to increase cardiac output* - **Beta-blockers should be continued perioperatively** in patients already taking them - Abrupt withdrawal increases risk of **rebound hypertension, tachycardia, myocardial ischemia, and MI** - Stopping beta-blockers can precipitate life-threatening cardiovascular events - Should be given on the morning of surgery with a sip of water *Incorrect: Increase aspirin dosage for additional analgesic benefit* - No indication to increase aspirin dose perioperatively - Aspirin is not used as a primary analgesic in surgical settings - Increasing dose would unnecessarily increase bleeding risk without therapeutic benefit
Forensic Medicine
1 questionsA body brought for autopsy is cold and has developed rigor mortis in all 4 limbs and livor mortis at the back (fixed), but no signs of putrefaction. What will be the estimated time since death?
FMGE 2025 - Forensic Medicine FMGE Practice Questions and MCQs
Question 151: A body brought for autopsy is cold and has developed rigor mortis in all 4 limbs and livor mortis at the back (fixed), but no signs of putrefaction. What will be the estimated time since death?
- A. 24-48 hrs
- B. 6-12 hrs
- C. 12-24 hrs (Correct Answer)
- D. 36-48 hrs
Explanation: ***Correct Option: 12-24 hrs*** - At this stage, **rigor mortis** is typically fully established across all muscle groups (maximal development occurs around 12 hours) and has not yet started to resolve. - **Livor mortis** becomes **fixed** (non-blanching upon pressure) usually after 12 hours, placing the time since death beyond the initial 12-hour window. - **Putrefaction** has not yet begun, which is consistent with this timeframe as putrefactive changes typically start after 24 hours. *Incorrect Option: 6-12 hrs* - During this period, **rigor mortis** is still developing (maximal development is typically approached at 12 hours) and might not be present in all four limbs (starts in smaller joints/upper limbs). - **Livor mortis** is usually present but often still **unfixed** or only partially fixed, meaning it might shift or blanch with pressure. *Incorrect Option: 24-48 hrs* - Around 24 hours, **rigor mortis** generally begins to resolve (**passing off**) starting from the face and neck, contradicting the finding of full rigor in all four limbs. - This timeframe is when the first signs of **putrefaction** (e.g., green discoloration of the abdomen) usually become visible, which is stated to be absent in the body. *Incorrect Option: 36-48 hrs* - By 36 to 48 hours, **rigor mortis** is typically completely resolved (**secondary flaccidity**). - Putrefaction would likely be significantly advanced during this period, including potential signs like marked **marbling** or abdominal swelling.
Internal Medicine
1 questionsWhich electrolyte abnormality will lead to cardiac arrhythmia in patients with severe vomiting?
FMGE 2025 - Internal Medicine FMGE Practice Questions and MCQs
Question 151: Which electrolyte abnormality will lead to cardiac arrhythmia in patients with severe vomiting?
- A. Hyponatremia
- B. Hypokalemia (Correct Answer)
- C. Hyperkalemia
- D. Hypocalcemia
Explanation: ***Hypokalemia*** - Severe vomiting leads to significant loss of gastric acid and subsequent volume depletion, often resulting in **metabolic alkalosis** and substantial **potassium** loss (due to renal compensation and direct GI loss) [1]. - **Hypokalemia** directly affects cardiac muscle repolarization, predisposing the patient to various arrhythmias, including **ventricular tachycardia** (e.g., *Torsades de pointes*) [2], [3]. *Hyponatremia* - While severe vomiting can cause hyponatremia (due to volume loss and inappropriate ADH release), symptomatic effects are primarily **neurological** (e.g., seizures, confusion), not typically cardiac arrhythmias [2]. - The effect on the heart tends to be mild unless the drop is very rapid and severe; it primarily influences **myocardial contractility** through fluid shifts [2]. *Hyperkalemia* - Hyperkalemia causes severe and characteristic ECG changes (tall, peaked T waves, broadened QRS, possible asystole), but it is **not associated** with severe vomiting, which typically causes **hypokalemia** [2]. - Hyperkalemia is more commonly seen in conditions like **renal failure** or acidosis [4]. *Hypocalcemia* - Hypocalcemia primarily affects the heart by causing **prolongation of the QT interval**, which can increase the risk of *Torsades de pointes*, similar to hypokalemia. - However, calcium losses from simple gastric vomiting are generally **not as dramatic** or primary as the potassium losses, making hypokalemia the most direct and common cause of arrhythmia in this specific clinical scenario [1].
Microbiology
1 questionsA 39-year-old patient with HIV and a CD4 count of 139 cells/μL presents with altered sensorium and impaired consciousness. CSF examination using an India ink preparation reveals a positive result. Which organism is most likely responsible?
FMGE 2025 - Microbiology FMGE Practice Questions and MCQs
Question 151: A 39-year-old patient with HIV and a CD4 count of 139 cells/μL presents with altered sensorium and impaired consciousness. CSF examination using an India ink preparation reveals a positive result. Which organism is most likely responsible?
- A. Candida albicans
- B. Histoplasma capsulatum
- C. Cryptococcus neoformans (Correct Answer)
- D. Aspergillus fumigatus
Explanation: ***Cryptococcus neoformans***- The classic finding of a positive **India ink preparation** upon CSF examination indicates the large polysaccharide **capsule** characteristic of this yeast.- In patients with advanced HIV (**CD4 <200** cells/μL), *C. neoformans* is the most common cause of **fungal meningoencephalitis** presenting with altered mental status.*Aspergillus fumigatus*- CNS infection with *Aspergillus* usually manifests as **focal cerebral lesions** (abscesses) or hemorrhagic infarction due to angioinvasion, not typically diffuse meningitis.- Diagnosis generally relies on culturing the fungus, **histopathology** showing septate hyphae, or detecting **galactomannan antigen** in the serum or CSF.*Histoplasma capsulatum*- While it can cause disseminated infection in patients with AIDS, CNS involvement is less frequent than *Cryptococcus* and the yeast is **intracellular** (within macrophages).- Detection typically utilizes **Histoplasma antigen testing** in urine or serum, as the small yeasts do not possess the large capsule highlighted by India ink.*Candida albicans*- *Candida* is a common cause of superficial or disseminated infection, but isolated **Candida meningitis** is rare, usually seen after neurosurgery or hematogenous seeding.- *Candida* **lacks the prominent capsule** that would produce a positive result on an India ink preparation.
Obstetrics and Gynecology
1 questionsA 30-year-old female who delivered a healthy term baby one week ago is now presenting to the OBG clinic with complaints of fishy-smelling pale brownish vaginal discharge. What is the nature of this discharge?
FMGE 2025 - Obstetrics and Gynecology FMGE Practice Questions and MCQs
Question 151: A 30-year-old female who delivered a healthy term baby one week ago is now presenting to the OBG clinic with complaints of fishy-smelling pale brownish vaginal discharge. What is the nature of this discharge?
- A. Leukorrhea
- B. Lochia Serosa (Correct Answer)
- C. Lochia Rubra
- D. Lochia Alba
Explanation: ***Lochia Serosa***- This stage of postpartum discharge typically begins around **day 4** and lasts until **day 10** postpartum, aligning perfectly with the patient’s presentation at one week (7 days) after delivery.- It is characterized by a **pale brownish** or pinkish, watery discharge, consisting of old blood, serum, and leukocytes. The described "fishy smell" likely results from bacterial colonization, common in this stage, but the timing dictates the stage.*Lochia Rubra*- This is the initial, heavy stage of lochia, which occurs during the first **1 to 3 days** postpartum.- The discharge is predominantly **bright red** and bloody, containing large amounts of decidua and tissue fragments, not pale brownish.*Lochia Alba*- This is the final stage of lochia, usually beginning after **day 10** (or even two weeks) and may persist for several weeks.- It is typically **creamy, white, or yellowish** in color, containing predominantly leukocytes, epithelial cells, and mucus.*Leukorrhea*- This is a broad term for **non-bloody vaginal discharge** related to normal physiological changes (like ovulation) or pathological conditions (like vaginitis).- While lochia contains many components of leukorrhea (white cells), **lochia** is the specific and correct term for the expected postpartum discharge composed of blood, serum, and tissue.
Pediatrics
2 questionsA baby presents with the clinical features shown in the image, including characteristic perioral and perianal rash along with a history of diarrhea. Which of the following is the most likely deficiency responsible for this condition?
A newborn child is brought to the emergency department with respiratory difficulty. On evaluation, the child was found to have a posterolateral defect, as shown in the x-ray given. What is the diagnosis?
FMGE 2025 - Pediatrics FMGE Practice Questions and MCQs
Question 151: A baby presents with the clinical features shown in the image, including characteristic perioral and perianal rash along with a history of diarrhea. Which of the following is the most likely deficiency responsible for this condition?
- A. Niacin Deficiency
- B. Zinc Deficiency (Correct Answer)
- C. Selenium Deficiency
- D. Magnesium Deficiency
Explanation: ***Zinc Deficiency*** - The clinical triad of **periorificial** (perioral, perianal) and **acral dermatitis**, **alopecia**, and **diarrhea** is characteristic of **Acrodermatitis Enteropathica**, which is caused by zinc deficiency. - The rash seen in the image, an eczematous, vesiculobullous, and crusted eruption around the mouth and eyes, is the hallmark cutaneous manifestation of this condition. *Niacin Deficiency* - Niacin (Vitamin B3) deficiency results in **Pellagra**, classically presenting with the “3 Ds”: **dermatitis**, **diarrhea**, and **dementia**. - The dermatitis of pellagra is a **photosensitive rash**, typically in sun-exposed areas like the neck (**Casal's necklace**), and does not have a periorificial distribution. *Selenium Deficiency* - Selenium deficiency is primarily associated with **cardiomyopathy** (**Keshan disease**) and skeletal myopathy (**Kashin-Beck disease**). - While it can cause nail bed changes (whitening) and hair loss, it is not associated with the characteristic periorificial rash seen in the image. *Magnesium Deficiency* - Hypomagnesemia primarily causes **neuromuscular hyperexcitability**, leading to symptoms like **tetany**, **tremors**, seizures, and **cardiac arrhythmias** (e.g., Torsades de pointes). - It does not cause a characteristic dermatological rash like the one presented.
Question 152: A newborn child is brought to the emergency department with respiratory difficulty. On evaluation, the child was found to have a posterolateral defect, as shown in the x-ray given. What is the diagnosis?
- A. Morgagni hernia
- B. Bochdalek hernia (Correct Answer)
- C. Hiatal hernia
- D. Traumatic diaphragmatic hernia
Explanation: ***Bochdalek hernia*** - This is the most common type of **congenital diaphragmatic hernia (CDH)**, representing about 85-90% of cases, and is characterized by a defect in the **posterolateral** aspect of the diaphragm. - It most commonly occurs on the **left side**, allowing abdominal contents like the stomach and intestines to herniate into the chest, leading to **pulmonary hypoplasia** and severe respiratory distress in a newborn, which is consistent with the X-ray findings. *Morgagni hernia* - This is a rare type of CDH involving an **anteromedial** defect in the diaphragm, specifically through the foramen of Morgagni, not a posterolateral one. - It is more commonly found on the **right side** and is often asymptomatic, typically diagnosed incidentally later in life rather than causing acute respiratory failure in a newborn. *Hiatal hernia* - This involves the protrusion of the upper part of the stomach into the thorax through the **esophageal hiatus**, a different anatomical location than the defect in this case. - Hiatal hernias are most often associated with **gastroesophageal reflux disease (GERD)** and are uncommon causes of severe respiratory distress in the neonatal period. *Traumatic diaphragmatic hernia* - This is an **acquired** condition resulting from blunt or penetrating trauma to the chest or abdomen that causes a rupture of the diaphragm. - The patient is a newborn, making a **congenital defect** the cause of the hernia, not trauma.
Radiology
1 questionsIdentify the type of diaphragmatic hernia shown in the X-ray.
FMGE 2025 - Radiology FMGE Practice Questions and MCQs
Question 151: Identify the type of diaphragmatic hernia shown in the X-ray.
- A. Morgagni hernia
- B. Bochdalek hernia (Correct Answer)
- C. Hiatal hernia
- D. Traumatic diaphragmatic hernia
Explanation: ***Bochdalek hernia*** - This is the most common type of congenital diaphragmatic hernia (CDH), accounting for over 80% of cases, and is characterized by a defect in the **posterolateral** aspect of the diaphragm. - The X-ray shows classic findings: multiple **gas-filled bowel loops** in the left hemithorax, causing **mediastinal shift** to the right and compression of the left lung, which is consistent with a left-sided Bochdalek hernia. *Morgagni hernia* - This is a rare, **anteromedial** diaphragmatic defect that occurs through the **foramen of Morgagni**, typically on the right side. - It is less common than Bochdalek hernia and often discovered incidentally in older children or adults, presenting with less severe respiratory symptoms. *Hiatal hernia* - This involves the protrusion of the upper part of the stomach through the **esophageal hiatus** into the chest. - It is a midline defect and typically presents with **gastroesophageal reflux disease (GERD)**, not the extensive herniation of multiple abdominal organs seen in this neonatal X-ray. *Traumatic diaphragmatic hernia* - This is an **acquired** condition resulting from severe blunt or penetrating trauma to the chest or abdomen, not a congenital defect. - While it can appear similar on imaging, the clinical context of a newborn (as suggested by the image) makes a congenital cause like Bochdalek hernia the most likely diagnosis.