Edema and Fluid Retention — MCQs
Least common cause for bilateral pedal edema
A patient with heart failure presents with worsening peripheral edema. Which of the following mechanisms contributes most directly to this finding?
Which condition is most commonly associated with non-pitting edema?
Edema in nephrotic syndrome is due to ?
12 years male came with swelling of lower end tibia which is surrounded by rim of reactive bone. What is most likely diagnosis?
A 40-year-old woman presents with facial swelling, periorbital edema, and proteinuria. Which condition is most likely responsible for her symptoms?
Consider the following clinical features : 1. Raised ICP 2. Seizures 3. Focal deficit 4. Headache Which of the above clinical features are related to most brain tumours?
A 75-year-old man with chronic kidney disease presents with worsening dyspnea and lower extremity edema. Which class of drugs should be used cautiously in this patient?
What is a potential risk associated with the use of thiazolidinediones in the treatment of type 2 diabetes?
A man takes peanut and develops tongue swelling, neck swelling, stridor, hoarseness of voice. What is the probable diagnosis?
Edema and Fluid Retention Indian Medical PG Practice Questions and MCQs
Question 1: Least common cause for bilateral pedal edema
- A. CKD
- B. Chronic vascular insufficiency (Correct Answer)
- C. CLD
- D. HF with reduced ejection fraction
Explanation: ***Chronic vascular insufficiency*** - While chronic venous insufficiency is a common cause of bilateral pedal edema, **arterial insufficiency** (a type of chronic vascular insufficiency) is a much less common cause of pure edema and is more often associated with **ischemic pain**, **ulcers**, and **skin atrophy** [1]. - **Arterial insufficiency** primarily causes limb ischemia rather than significant edema, differentiating it from situations where fluid retention is the primary issue [2]. *CKD* - **Chronic kidney disease (CKD)** leads to impaired fluid and sodium excretion, causing generalized fluid overload. - This fluid overload commonly manifests as **bilateral pedal edema** due to gravity-dependent fluid accumulation. *CLD* - **Chronic liver disease (CLD)**, particularly cirrhosis, results in **portal hypertension** and decreased hepatic synthesis of **albumin**. - This leads to reduced oncotic pressure and increased hydrostatic pressure, driving fluid into the extravascular space, often causing **ascites** and **bilateral pedal edema**. *HF with reduced ejection fraction* - **Heart failure with reduced ejection fraction (HFrEF)** impairs the heart's ability to pump blood effectively, leading to fluid backup in the venous system [2]. - This increased hydrostatic pressure in the peripheral capillaries directly causes **bilateral pedal edema** as fluid extravasates into the interstitial space [2].
Question 2: A patient with heart failure presents with worsening peripheral edema. Which of the following mechanisms contributes most directly to this finding?
- A. Lymphatic obstruction
- B. Decreased plasma oncotic pressure
- C. Increased capillary hydrostatic pressure (Correct Answer)
- D. Increased vascular permeability
Explanation: ***Increased capillary hydrostatic pressure*** - In **heart failure**, the heart's inability to effectively pump blood forward leads to a **backup of blood** in the venous system. [1] - This elevated venous pressure is transmitted backward to the capillaries, increasing **capillary hydrostatic pressure**, which significantly promotes the filtration of fluid from the capillaries into the interstitial space, causing edema. [1] *Lymphatic obstruction* - **Lymphatic obstruction** typically results in **lymphedema**, which is initially non-pitting and affects specific areas due to localized lymphatic damage. - While it can cause edema, it is not the primary or most direct mechanism for generalized peripheral edema in typical **heart failure**. *Decreased plasma oncotic pressure* - **Decreased plasma oncotic pressure**, often due to conditions like **liver disease** or **nephrotic syndrome**, reduces the osmotic pull of fluid back into the capillaries. - While it can contribute to edema, this is not the most direct or primary mechanism in heart failure, where fluid retention is predominantly driven by pressure changes. *Increased vascular permeability* - **Increased vascular permeability**, often seen in **inflammation** or **allergic reactions**, allows proteins and fluid to leak out of capillaries, forming exudative edema. - This is rarely the main cause of the widespread, **pitting edema** seen in heart failure, which is transudative and primarily pressure-driven.
Question 3: Which condition is most commonly associated with non-pitting edema?
- A. Congestive heart failure (CHF)
- B. Myxedema (Hypothyroidism) (Correct Answer)
- C. Liver cirrhosis
- D. Nephrotic syndrome
Explanation: ***Myxedema (Hypothyroidism)*** - Non-pitting edema in myxedema is caused by the accumulation of **hyaluronic acid** and other glycosaminoglycans in the interstitial tissue [2]. - This accumulation creates a **gel-like matrix** that does not pit when pressed, distinguishing it from other forms of edema. *Congestive heart failure (CHF)* - CHF typically causes **pitting edema** due to increased hydrostatic pressure, leading to fluid extravasation into the interstitial space. - The excess fluid is primarily water and electrolytes, allowing for displacement upon pressure. *Liver cirrhosis* - Liver cirrhosis leads to **pitting edema**, often in the lower extremities and abdomen (**ascites**), due to decreased albumin synthesis and portal hypertension. - The reduced oncotic pressure and increased hydrostatic pressure result in fluid leakage that is easily compressible [1]. *Nephrotic syndrome* - Nephrotic syndrome is characterized by **pitting edema**, which is widespread (**anasarca**) and primarily caused by severe **hypoalbuminemia** [1]. - The significant loss of protein in the urine reduces plasma oncotic pressure, leading to fluid accumulation that readily pits with pressure.
Question 4: Edema in nephrotic syndrome is due to ?
- A. Hyperlipidemia
- B. Hypoalbuminemia (Correct Answer)
- C. Sodium & water retention
- D. Increased venous pressure
Explanation: ***Hypoalbuminemia*** - In **nephrotic syndrome**, damage to the glomerular basement membrane leads to significant **proteinuria**, particularly the loss of **albumin**. [3] - **Hypoalbuminemia** reduces the plasma **oncotic pressure**, causing fluid to shift from the intravascular space into the interstitial space, resulting in **edema**. [1], [3] *Hyperlipidemia* - **Hyperlipidemia** is a common feature of nephrotic syndrome but is not directly responsible for the development of edema. - It results from increased hepatic synthesis of lipoproteins in response to low systemic **oncotic pressure**. *Sodium & water retention* - While **sodium and water retention** do contribute to the exacerbation of edema in nephrotic syndrome, they are secondary events driven by the initial **hypovolemia** resulting from **hypoalbuminemia**. [2] - The reduced effective circulating volume triggers the **renin-angiotensin-aldosterone system** and antidiuretic hormone release, leading to renal sodium and water reabsorption. *Increased venous pressure* - **Increased venous pressure** is not a primary cause of edema in nephrotic syndrome. - It is typically associated with conditions like **congestive heart failure** or local venous obstruction, where it impedes venous return and causes fluid accumulation.
Question 5: 12 years male came with swelling of lower end tibia which is surrounded by rim of reactive bone. What is most likely diagnosis?
- A. GCT
- B. Hyper PTH
- C. Brodie's Abscess (Correct Answer)
- D. Osteomyelitis
Explanation: ***Brodie's Abscess*** - A **Brodie's abscess** is a subacute or chronic osteomyelitis characterized by a localized bone abscess, typically with a surrounding **sclerotic rim of reactive bone**. - It often occurs in the **metaphysis of long bones** (like the lower end of the tibia) in children and adolescents, presenting with localized pain and swelling. *GCT* - **Giant cell tumor (GCT)** typically occurs in **skeletally mature adults** (20-40 years old) and is a lytic lesion often found in the **epiphysis** of long bones, rarely with a distinct sclerotic rim. - GCTs are generally more aggressive and demonstrate a **soap-bubble appearance** with cortical expansion rather than a thick reactive bone rim. *Hyper PTH* - **Hyperparathyroidism** causes bone changes such as **osteopenia**, **subperiosteal bone resorption**, especially in the phalanges, and **brown tumors** (lytic lesions). - It does not typically present as a localized lesion with a **sclerotic rim of reactive bone** in a child. *Osteomyelitis* - While chronic osteomyelitis can involve local bone destruction and reactive bone formation, a **Brodie's abscess** is a specific, well-circumscribed form of **subacute osteomyelitis**. - Acute osteomyelitis presents with more diffuse systemic symptoms (fever, malaise) and less defined reactive bone in its early stages compared to the distinct **sclerotic rim** seen in a Brodie's abscess.
Question 6: A 40-year-old woman presents with facial swelling, periorbital edema, and proteinuria. Which condition is most likely responsible for her symptoms?
- A. Congestive heart failure
- B. Liver cirrhosis
- C. Hypothyroidism
- D. Nephrotic syndrome (Correct Answer)
Explanation: ***Nephrotic syndrome*** - The combination of **facial swelling**, **periorbital edema**, and **proteinuria** is the classic triad of symptoms defining nephrotic syndrome [1]. - This syndrome is characterized by **massive proteinuria** (>3.5g/day), leading to **hypoalbuminemia**, which in turn causes reduced plasma oncotic pressure and fluid extravasation into interstitial spaces [1]. *Congestive heart failure* - While it can cause **edema**, it typically presents with **dependent edema** (e.g., in legs), **dyspnea**, and signs of fluid overload, not prominent facial or periorbital edema as a primary symptom with proteinuria. - **Proteinuria** can occur in chronic heart failure due to reduced renal perfusion, but it is usually not the massive proteinuria characteristic of nephrotic syndrome. *Liver cirrhosis* - Can cause **peripheral edema** and **ascites** due to portal hypertension and hypoalbuminemia, but **facial and periorbital edema** are less common as primary presenting symptoms. - While some **proteinuria** can be seen in chronic liver disease, it's typically milder and not the massive proteinuria seen in nephrotic syndrome. *Hypothyroidism* - Can cause **non-pitting edema** (myxedema), often described as puffy facial features and periorbital swelling, due to the accumulation of **hyaluronic acid** in the interstitial space. - However, **significant proteinuria** is not a characteristic feature of hypothyroidism; hence, it's less likely to explain the full constellation of symptoms.
Question 7: Consider the following clinical features : 1. Raised ICP 2. Seizures 3. Focal deficit 4. Headache Which of the above clinical features are related to most brain tumours?
- A. 2, 3 and 4 only
- B. 1 and 2 only
- C. 1, 2, 3 and 4 (Correct Answer)
- D. 1, 2 and 3 only
Explanation: ***1, 2, 3 and 4*** - All four clinical features—**raised ICP**, **seizures**, **focal neurological deficits**, and **headache**—are commonly associated with brain tumors [1]. - Brain tumors can cause **increased intracranial pressure** through mass effect, edema, or CSF flow obstruction, leading to headaches and, less commonly, seizures [1]. **Focal deficits** result from direct tissue destruction or compression depending on the tumor's location [2]. *2, 3 and 4 only* - This option incorrectly omits **raised ICP**, which is a frequent and significant symptom of brain tumors, contributing to headaches, nausea, vomiting, and altered mental status [1]. - While seizures, focal deficits, and headaches are common, **raised ICP** often underlies many of these symptoms. *1 and 2 only* - This option excludes **focal deficits** and **headache**, both of which are very common presentations of brain tumors. - The specific location of a tumor often dictates **focal deficits** [2], and **headache** is one of the most prevalent symptoms. *1, 2 and 3 only* - This option incorrectly omits **headache**, which is a classic and highly prevalent symptom in patients with brain tumors, often severe and resistant to common analgesics. - Headaches can result from **mass effect**, **increased ICP** [1], or irritation of pain-sensitive structures within the brain.
Question 8: A 75-year-old man with chronic kidney disease presents with worsening dyspnea and lower extremity edema. Which class of drugs should be used cautiously in this patient?
- A. NSAIDs (Correct Answer)
- B. Beta-blockers
- C. Diuretics
- D. ACE inhibitors
Explanation: ***NSAIDs*** - **NSAIDs** can cause **acute kidney injury** by inhibiting prostaglandin synthesis, which leads to **afferent arteriolar vasoconstriction** and reduced renal blood flow. This effect is exaggerated in patients with **pre-existing chronic kidney disease**. - They also can exacerbate **fluid retention** and worsen **edema** and symptoms of **heart failure**, which is particularly problematic in a patient with dyspnea and lower extremity edema. *ACE inhibitors* - While generally beneficial in CKD to slow progression, **ACE inhibitors** can cause **acute kidney injury** in patients with **renal artery stenosis** or severe volume depletion due to efferent arteriolar vasodilation. - They can also lead to **hyperkalemia**, which requires monitoring, but they are not contraindicated in this patient's presentation per se. *Beta-blockers* - **Beta-blockers** are often prescribed for cardiovascular conditions common in CKD patients, such as **hypertension** and **heart failure**, and are generally safe in CKD with appropriate dosing. - While some beta-blockers are renally excreted, their primary mechanism does not directly worsen kidney function or fluid retention in the same way NSAIDs do. *Diuretics* - **Diuretics** are essential in managing fluid overload, dyspnea, and edema in patients with **chronic kidney disease** and heart failure. - Although loop diuretics may be less effective with reduced kidney function and higher doses might be needed, they are not typically used cautiously; rather, they are a cornerstone of treatment for these symptoms.
Question 9: What is a potential risk associated with the use of thiazolidinediones in the treatment of type 2 diabetes?
- A. Heart failure (Correct Answer)
- B. Pulmonary fibrosis
- C. Myocarditis
- D. Renal dysfunction
Explanation: ***Heart failure*** - Thiazolidinediones (TZDs), such as **pioglitazone** and **rosiglitazone**, can cause **fluid retention** and **volume expansion**, which may precipitate or worsen congestive heart failure. - This risk is higher in patients with pre-existing cardiac conditions and is a significant concern for these drugs. *Pulmonary fibrosis* - **Pulmonary fibrosis** is not a known or common adverse effect associated with thiazolidinedione use. - This condition is typically linked to certain other medications (e.g., **amiodarone**, **methotrexate**) or systemic diseases. *Myocarditis* - **Myocarditis**, inflammation of the heart muscle, is not a recognized side effect of thiazolidinediones. - Myocarditis is more commonly caused by viral infections, autoimmune diseases, or hypersensitivity reactions to certain drugs, but not TZDs. *Renal dysfunction* - While TZDs can cause fluid retention, they do not directly cause **renal dysfunction** or damage the kidneys. - In fact, some studies suggest they may have renoprotective effects due to reduced proteinuria, although fluid balance needs careful monitoring in patients with impaired renal function.
Question 10: A man takes peanut and develops tongue swelling, neck swelling, stridor, hoarseness of voice. What is the probable diagnosis?
- A. FB in larynx
- B. Angioneurotic edema (Correct Answer)
- C. Parapharyngeal abscess
- D. FB bronchus
Explanation: Andioneurotic edema - The combination of **tongue swelling**, **neck swelling**, **stridor**, and **hoarseness of voice** following peanut ingestion is highly suggestive of **angioneurotic edema**, a severe allergic reaction that can lead to airway obstruction [1]. - This is a life-threatening condition requiring immediate medical intervention, often associated with generalized **anaphylaxis** when triggered by allergens [2]. *FB in larynx* - While a **foreign body (FB) in the larynx** can cause stridor and hoarseness, the widespread swelling of the tongue and neck points away from a localized laryngeal obstruction [3]. - A laryngeal FB would typically be associated with a more sudden onset of choking and coughing, not diffuse edema [3]. *Parapharyngeal abscess* - A **parapharyngeal abscess** would typically present with **fever**, **severe throat pain**, and **trismus** (difficulty opening the mouth), which are not mentioned in this scenario. - The acute, rapid onset of symptoms after peanut consumption is inconsistent with the slower progression of an abscess. *FB bronchus* - A **foreign body in the bronchus** would primarily cause **coughing**, **wheezing**, and possibly **respiratory distress**, often unilateral, rather than severe global swelling of the tongue and neck. - Inspiratory stridor and hoarseness are more indicative of upper airway involvement than bronchial obstruction.
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