Metabolic Syndrome — MCQs
Which of the following is not the criteria for diagnosis of Metabolic syndrome?
Stress hyperglycemia occurs due to all except -
Mr. Murali has 126 mg/dl of fasting plasma glucose. His venous plasma glucose 2h after ingestion of 75g oral glucose load is 149 mg/dl. This patient comes under which stage of WHO diagnostic criteria of diabetes & intermediate hyperglycemia?
The most appropriate management approach for anorexia nervosa includes:
Obesity predisposes to all, except ?
Which hormone is primarily responsible for insulin resistance during pregnancy?
According to NCEP-ATP III, which among the following have not been included in metabolic syndrome?
A diabetic patient's fasting blood glucose level is found to be $160 \mathrm{mg} / \mathrm{dL}$. What will you advise the patient regarding non-pharmacological management?
Which of the following anti-gout drugs acts by inhibiting the enzyme xanthine oxidase?
Which antipsychotic is most likely to cause metabolic syndrome?
Metabolic Syndrome Indian Medical PG Practice Questions and MCQs
Question 1: Which of the following is not the criteria for diagnosis of Metabolic syndrome?
- A. High LDL (Correct Answer)
- B. Hyperiglyceridemia
- C. Hypertension
- D. Central obesity
Explanation: ***High LDL*** - While **high LDL (low-density lipoprotein)** is a risk factor for cardiovascular disease [1], it is **not** one of the specific diagnostic criteria for metabolic syndrome. - The criteria for metabolic syndrome focus on a cluster of metabolic abnormalities associated with insulin resistance. *Hypertriglyceridemia* - **Elevated triglycerides** (typically ≥ 150 mg/dL or on drug treatment for elevated triglycerides) is one of the key diagnostic criteria for metabolic syndrome. - It reflects impaired lipid metabolism often associated with insulin resistance [2]. *Hypertension* - **Elevated blood pressure** (systolic ≥ 130 mmHg or diastolic ≥ 85 mmHg, or on antihypertensive drug treatment) is a core component of metabolic syndrome. - Hypertension in this context is often linked to underlying insulin resistance. *Central obesity* - **Increased waist circumference** (varying by ethnicity and sex, e.g., >102 cm in men and >88 cm in women for adults of European descent) is a primary criterion for metabolic syndrome. - It is a strong indicator of visceral fat accumulation, which is closely linked to insulin resistance [3].
Question 2: Stress hyperglycemia occurs due to all except -
- A. Increased level of ACTH
- B. Decreased level of norepinephrine (Correct Answer)
- C. Insulin resistance
- D. Increased level of cortisol
Explanation: ***Decreased level of norepinephrine*** - **Norepinephrine** is a **catecholamine** that generally **increases blood glucose** by stimulating **glycogenolysis** and **gluconeogenesis**. - Therefore, a *decrease* in norepinephrine would *reduce* stress-induced hyperglycemia, making this the exception. *Increased level of ACTH* - **ACTH (Adrenocorticotropic Hormone)** stimulates the adrenal glands to release **cortisol**, which contributes significantly to stress hyperglycemia. - Increased ACTH levels therefore *promote* hyperglycemia in stress. *Insulin resistance* - **Insulin resistance** is a common feature during stress, where target cells become less responsive to insulin's effects. - This reduced insulin sensitivity leads to higher circulating glucose levels, contributing to hyperglycemia. *Increased level of cortisol* - **Cortisol** is a key **stress hormone** that promotes **gluconeogenesis** (production of glucose from non-carbohydrate sources) and **glycogenolysis** (breakdown of glycogen to glucose). - Elevated cortisol levels directly lead to an increase in blood glucose, causing hyperglycemia.
Question 3: Mr. Murali has 126 mg/dl of fasting plasma glucose. His venous plasma glucose 2h after ingestion of 75g oral glucose load is 149 mg/dl. This patient comes under which stage of WHO diagnostic criteria of diabetes & intermediate hyperglycemia?
- A. Decreased glucose resistance
- B. IFG - Impaired fasting glucose
- C. Diagnosis of diabetes (Correct Answer)
- D. Impaired glucose tolerance
Explanation: **Diagnosis of diabetes** - The **fasting plasma glucose (FPG)** of 126 mg/dL meets the WHO criterion for **diabetes**, which is FPG ≥ 126 mg/dL [1]. - Although the 2-hour post-glucose load (149 mg/dL) falls within the **impaired glucose tolerance (IGT)** range (140-199 mg/dL), the elevated fasting glucose alone is sufficient for a diabetes diagnosis according to WHO guidelines. *Decreased glucose resistance* - This term is not a standard diagnostic category recognized by the WHO for glucose metabolism disorders. - Glucose resistance is more commonly associated with conditions like **insulin resistance** rather than a specific diagnostic stage [1]. *IFG - Impaired fasting glucose* - **Impaired fasting glucose (IFG)** is defined by a fasting plasma glucose level between 100 mg/dL and 125 mg/dL. - Mr. Murali's fasting glucose of 126 mg/dL is higher than the upper limit for IFG [1]. *Impaired glucose tolerance* - **Impaired glucose tolerance (IGT)** is defined by a 2-hour post-glucose load plasma glucose level between 140 mg/dL and 199 mg/dL. - While Mr. Murali's 2-hour reading of 149 mg/dL falls within this range, the elevated fasting glucose level takes precedence for the overall diagnosis [1].
Question 4: The most appropriate management approach for anorexia nervosa includes:
- A. Immediate high-calorie diet with rapid weight gain
- B. Strict bed rest with minimal physical activity
- C. Antipsychotic medications as first-line treatment
- D. Multidisciplinary approach with psychological therapy and nutritional rehabilitation (Correct Answer)
Explanation: ***Multidisciplinary approach with psychological therapy and nutritional rehabilitation*** - This is the **gold standard** and most appropriate management approach for **anorexia nervosa** according to all major guidelines (APA, NICE, IPS). - The multidisciplinary team includes: **psychiatrists, psychologists, dietitians, physicians**, and social workers working collaboratively. - **Psychological therapy** (particularly **CBT-E** for adults and **Family-Based Therapy/FBT** for adolescents) addresses distorted body image, eating behaviors, and underlying psychological factors. - **Nutritional rehabilitation** involves gradual, monitored weight restoration to prevent **refeeding syndrome** while addressing nutritional deficiencies. - **Medical monitoring** for complications (cardiovascular, electrolyte imbalances, bone health) is integrated throughout treatment. - This comprehensive approach addresses both the acute medical needs and long-term recovery, with evidence showing best outcomes. *Strict bed rest with minimal physical activity* - While temporary bed rest may be used in cases of **severe medical instability** (very low heart rate, severe electrolyte disturbances), it is not the overall management "approach." - Prolonged bed rest can worsen outcomes by causing **muscle wasting**, **bone density loss**, and psychological dependence. - Modern guidelines emphasize **gradual mobilization** with medical supervision rather than strict bed rest. - Bed rest is a specific medical intervention, not a comprehensive management strategy. *Immediate high-calorie diet with rapid weight gain* - Rapid refeeding is dangerous and can cause **refeeding syndrome**, characterized by severe shifts in **phosphate, potassium, and magnesium** levels. - Complications include **cardiac arrhythmias**, **respiratory failure**, and **seizures**. - Proper nutritional rehabilitation starts with **lower calories** (30-40 kcal/kg/day initially) and increases gradually under close monitoring. *Antipsychotic medications as first-line treatment* - **Antipsychotics are NOT first-line treatment** for anorexia nervosa. - Limited evidence for efficacy; **olanzapine** may be used as adjunct for severe anxiety or obsessive thoughts about food. - Medications alone are insufficient; psychological and nutritional interventions are essential. - May be considered for comorbid conditions but not as primary treatment.
Question 5: Obesity predisposes to all, except ?
- A. Diabetes
- B. Peptic ulcer disease (Correct Answer)
- C. Breast cancer
- D. Colon cancer
Explanation: ***Peptic ulcer disease*** - **Obesity** is generally **not considered a direct risk factor** for peptic ulcer disease; instead, factors like *H. pylori* infection and NSAID use are primary causes. - While comorbidities associated with obesity might indirectly influence gastric health, obesity itself doesn't directly predispose to ulcer formation. *Diabetes* - **Obesity**, particularly **abdominal obesity**, greatly increases the risk of **insulin resistance** and **Type 2 Diabetes Mellitus**. - Excess adipose tissue contributes to systemic inflammation and alters glucose metabolism. *Breast cancer* - **Obesity** is a significant risk factor for **postmenopausal breast cancer** due to increased estrogen production in adipose tissue. - It also promotes chronic inflammation, which can contribute to cancer development and progression. *Colon cancer* - **Obesity** is linked to an increased risk of **colorectal cancer** due to associated **insulin resistance**, chronic inflammation, and altered hormone levels. - These factors can stimulate cell proliferation and inhibit apoptosis in the colon.
Question 6: Which hormone is primarily responsible for insulin resistance during pregnancy?
- A. Estrogen
- B. HPL (Correct Answer)
- C. Progesterone
- D. GH
Explanation: ***HPL*** - **Human placental lactogen (HPL)**, also known as **chorionic somatomammotropin**, directly induces maternal insulin resistance to ensure a continuous supply of glucose to the fetus. - HPL levels rise throughout pregnancy, peaking in the third trimester, correlating with increasing insulin resistance. *Estrogen* - While **estrogen** levels are high in pregnancy, its primary role is in supporting uterine growth and maintaining the pregnancy, not directly causing significant insulin resistance. - High estrogen levels can enhance insulin sensitivity in some contexts, contrasting with the overall insulin resistance of pregnancy. *Progesterone* - **Progesterone** is crucial for maintaining pregnancy and relaxing smooth muscle but does not directly cause the marked insulin resistance seen in gestation. - It works synergistically with other hormones but is not the primary driver of glucose intolerance in pregnancy. *GH* - **Growth hormone (GH)** does contribute to insulin resistance in non-pregnant individuals and at high levels can cause insulin resistance, but it is not the primary hormone responsible for the unique physiological insulin resistance of pregnancy. - While GH is present, **HPL** is the dominant somatotropic hormone of pregnancy directly impacting glucose metabolism.
Question 7: According to NCEP-ATP III, which among the following have not been included in metabolic syndrome?
- A. High LDL (Correct Answer)
- B. Central Obesity
- C. Hypertriglyceridemia
- D. Hypertension
Explanation: ***High LDL*** - The **NCEP-ATP III criteria** for metabolic syndrome do not specifically include **high LDL cholesterol** as a diagnostic component. - While high LDL cholesterol is an independent risk factor for cardiovascular disease [1], it is not one of the five required criteria for metabolic syndrome. *Central Obesity* - **Central obesity**, defined by an elevated waist circumference, is a key diagnostic criterion for metabolic syndrome according to NCEP-ATP III. - It reflects increased visceral fat, which is metabolically active and contributes to insulin resistance. *Hypertriglyceridemia* - **Elevated serum triglycerides** (≥ 150 mg/dL or 1.7 mmol/L) is one of the essential diagnostic criteria for metabolic syndrome as defined by NCEP-ATP III. - This reflects an imbalance in lipid metabolism, often associated with insulin resistance [2]. *Hypertension* - **Hypertension** (blood pressure ≥ 130/85 mmHg or being on antihypertensive medication) is a core component of the metabolic syndrome criteria. - It signifies endothelial dysfunction and increased cardiovascular risk.
Question 8: A diabetic patient's fasting blood glucose level is found to be $160 \mathrm{mg} / \mathrm{dL}$. What will you advise the patient regarding non-pharmacological management?
- A. At least 25-35 g of dietary fibre
- B. <30 % of the calories should come from fat (Correct Answer)
- C. Dietary cholesterol <300 mg per day
- D. <2.3 g sodium intake every day
Explanation: ***<30 % of the calories should come from fat*** - Reducing dietary fat intake to less than 30% of total calories is a crucial non-pharmacological strategy for diabetic patients to manage blood glucose levels and prevent cardiovascular complications [1]. - Excess dietary fat, especially saturated and trans fats, can contribute to insulin resistance and weight gain, both of which negatively impact glycemic control [1]. *At least 25-35 g of dietary fibre* - While adequate dietary fiber (typically 25-30g for adults, sometimes up to 35g for men) is beneficial for managing blood glucose, it is generally recommended as a baseline for healthy eating and not the primary or most impactful intervention to address a fasting glucose of 160 mg/dL [1]. - Fiber helps slow glucose absorption and can improve insulin sensitivity, but a specific "at least 25-35g" statement without further context on total caloric intake or other macronutrient distribution might not be the most targeted advice for this specific glucose level [1]. *Dietary cholesterol <300 mg per day* - Limiting dietary cholesterol to less than 300 mg per day is a general recommendation for cardiovascular health, which is particularly important for diabetic patients due to their increased risk of atherosclerosis [2]. - However, for directly addressing a fasting blood glucose of 160 mg/dL, focusing on overall fat intake and carbohydrate quality would have a more immediate impact on glucose control than dietary cholesterol alone. *<2.3 g sodium intake every day* - Restricting sodium intake to less than 2.3 g per day is recommended for managing hypertension and reducing cardiovascular risk, which is often comorbid with diabetes [2]. - While important for overall health in diabetic patients, this recommendation does not directly target blood glucose control and would not be the primary non-pharmacological advice for a fasting glucose of 160 mg/dL.
Question 9: Which of the following anti-gout drugs acts by inhibiting the enzyme xanthine oxidase?
- A. Rasburicase
- B. Allopurinol (Correct Answer)
- C. Probenecid
- D. Sulfinpyrazone
Explanation: ***Allopurinol*** - **Allopurinol** is a purine analog that **inhibits xanthine oxidase**, thereby preventing the conversion of hypoxanthine and xanthine to uric acid. - Allopurinol is metabolized to **oxypurinol (alloxanthine)**, which acts as a **competitive inhibitor** of xanthine oxidase. - This action leads to a reduction in **serum uric acid levels**, which is crucial for preventing and treating gout attacks. *Probenecid* - **Probenecid** is a **uricosuric agent** that acts by inhibiting the reabsorption of uric acid in the renal tubules, leading to increased excretion of uric acid in the urine. - It does not affect the production of uric acid by inhibiting xanthine oxidase. *Rasburicase* - **Rasburicase** is a recombinant **uricase enzyme** that catalyzes the oxidation of uric acid to **allantoin**, a more water-soluble compound that is easily excreted by the kidneys. - It is primarily used for the management of **tumor lysis syndrome** and severe hyperuricemia, not by inhibiting xanthine oxidase. *Sulfinpyrazone* - **Sulfinpyrazone** is another **uricosuric agent** similar to probenecid, working by inhibiting the renal tubular reabsorption of uric acid. - Its mechanism of action is distinct from xanthine oxidase inhibition and focuses on enhancing uric acid excretion rather than reducing its production.
Question 10: Which antipsychotic is most likely to cause metabolic syndrome?
- A. Olanzapine
- B. Haloperidol
- C. Clozapine (Correct Answer)
- D. Risperidone
Explanation: ***Clozapine*** - **Clozapine** has the **highest risk** of causing **metabolic syndrome** among all antipsychotics, characterized by significant **weight gain**, **dyslipidemia**, **insulin resistance**, and **new-onset diabetes mellitus**. - Multiple meta-analyses consistently show clozapine causes the **most severe metabolic disturbances**, with weight gain often exceeding 5-10 kg in the first year of treatment. - The mechanism involves potent antagonism of **5-HT2C receptors**, **histamine H1 receptors**, and effects on **leptin signaling** and **glucose metabolism**. - Its use requires careful **metabolic monitoring** including baseline and periodic measurement of weight, BMI, waist circumference, fasting glucose, and lipid profile. - Despite these risks, clozapine remains the gold standard for **treatment-resistant schizophrenia**, but its metabolic effects necessitate risk-benefit consideration. *Olanzapine* - **Olanzapine** has the **second-highest risk** for metabolic syndrome after clozapine, also causing significant weight gain and metabolic disturbances. - Like clozapine, it has potent **5-HT2C** and **H1 antagonism**, leading to increased appetite and altered glucose-lipid metabolism. - The metabolic risk is substantial but generally slightly less severe than clozapine in head-to-head comparisons. *Haloperidol* - **Haloperidol** is a first-generation (typical) antipsychotic with a **significantly lower risk** of metabolic syndrome compared to clozapine or olanzapine. - Its primary adverse effects are **extrapyramidal symptoms** (akathisia, dystonia, parkinsonism) and **hyperprolactinemia** rather than metabolic disturbances. - It causes minimal weight gain and has low risk for diabetes or dyslipidemia. *Risperidone* - **Risperidone** has an **intermediate metabolic risk** among atypical antipsychotics, lower than clozapine or olanzapine but higher than some others like aripiprazole or ziprasidone. - While it can cause weight gain and metabolic changes, the magnitude is generally more modest. - Its more prominent side effect is **hyperprolactinemia** due to potent D2 antagonism.
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