Pulmonology Practice Questions

Q: Samters triad is seen in patients with ?

Asthma. ***Asthma*** - **Samter's triad** (also known as aspirin-exacerbated respiratory disease or AERD) is characterized by the presence of **asthma**, **aspirin sensitivity**, and **nasal polyps**. [1] - This condition is a distinct phenotype of asthma, where exposure to aspirin or other NSAIDs can trigger severe bronchospasm and other respiratory symptoms. [1] *Chronic pancreatitis* - Chronic pancreatitis is recurrent **inflammation of the pancreas** leading to progressive destruction of pancreatic tissue. [2] - It is not associated with Samter's triad; its symptoms often include **abdominal pain**, malabsorption, and diabetes. [2] *Crohn's disease* - Crohn's disease is a type of **inflammatory bowel disease** (IBD) that can affect any part of the gastrointestinal tract. [3] - Its symptoms typically involve **abdominal pain**, diarrhea, and weight loss, and it has no direct link to Samter's triad. *Liver cell carcinoma* - **Liver cell carcinoma** (hepatocellular carcinoma) is a primary cancer of the liver. - It is associated with risk factors such as **chronic hepatitis B or C infection** and cirrhosis, not Samter's triad.

Q: Upper lobe bronchiectasis is seen in which disease?

Cystic fibrosis. ***Cystic fibrosis*** - **Cystic fibrosis (CF)** classically affects the upper lobes due to poor mucociliary clearance in these areas, leading to recurrent infections and subsequent bronchiectasis. - The abnormal **CFTR protein** causes thick, sticky mucus that obstructs airways, making them susceptible to damage and dilation. *Tuberculosis* - While **post-primary tuberculosis** can cause cavitation and fibrosis in the upper lobes, leading to some degree of bronchiectasis, it's not the primary or classical cause of widespread upper lobe bronchiectasis like CF. - The mechanism is typically related to **tissue destruction** and fibrosis during healing, rather than primary mucociliary dysfunction. *Allergic Bronchopulmonary Aspergillosis (ABPA)* - **ABPA** can cause central bronchiectasis, often affecting the upper lobes, due to an allergic reaction to *Aspergillus* colonizing the airways. - However, the bronchiectasis in ABPA is typically **central and mucoid impaction-related**, in contrast to the diffuse pattern seen in CF. *Silicosis* - **Silicosis** typically leads to **nodular fibrotic changes** in the upper and mid-lung zones and can cause progressive massive fibrosis. - While it can indirectly lead to some airway distortion or traction bronchiectasis due to severe fibrosis, it is not primarily characterized by bronchiectasis as a prominent feature.

Q: A male patient presents to the emergency department. The arterial blood gas report is as follows: pH, 7.2; pCO2, 81 mmHg; and HCO3, 40 meq/L. Which of the following is the most likely diagnosis?

Respiratory acidosis. ***Respiratory acidosis*** - The **pH of 7.2** indicates **acidemia**, while the **elevated pCO2 (81 mmHg)** points to a primary respiratory problem [2]. - The elevated **HCO3 (40 meq/L)** suggests **renal compensation** attempting to buffer the increased carbonic acid [1]. *Respiratory alkalosis* - This condition presents with an **elevated pH (alkalemia)** and a **decreased pCO2**, which is opposite to the given ABG values [2]. - While there might be metabolic compensation with a decreased HCO3, the primary disturbance is an increase in respiratory rate leading to excessive CO2 exhalation. *Metabolic acidosis* - Metabolic acidosis is characterized by a **low pH** and a **low HCO3**, with a compensatory decrease in pCO2 [1]. - The given ABG shows a high HCO3, which rules out primary metabolic acidosis. *Metabolic alkalosis* - This condition would typically show an **elevated pH** and an **elevated HCO3**, with a compensatory increase in pCO2. - While both HCO3 and pCO2 are high in the given ABG, the low pH points to a primary acidosis, not alkalosis.

Q: A patient with a history of carcinoma of the bladder presents with dyspnoea, clinical signs of deep vein thrombosis (DVT), and tachycardia. Based on the Wells score for pulmonary embolism, what is the risk classification for this patient?

Moderate risk for pulmonary embolism. ***Moderate risk for pulmonary embolism*** - This patient accumulates several points on the Wells score: **malignancy** (1 point), **tachycardia** (HR > 100 bpm, 1.5 points), and **clinical signs of DVT** (3 points). [1] - A total score of 5.5 points falls into the **moderate risk category** (2 to 6 points) for pulmonary embolism. *Insufficient data to assess risk* - The provided clinical information, including a history of malignancy, dyspnoea, tachycardia, and signs of DVT, offers sufficient data for Wells score calculation. - The Wells score is designed to assess the pre-test probability of PE using readily available clinical parameters. [1] *Low risk for pulmonary embolism* - A low risk classification would require a Wells score of less than 2 points, which is not the case here given the patient's symptoms and history. - This patient's symptoms are highly suggestive of PE, making a low risk classification inappropriate. *High risk for pulmonary embolism* - A high risk classification typically corresponds to a Wells score greater than 6 points. - While concerning, a score of 5.5 points places the patient in the moderate rather than high-risk category.

Q: A patient with a known case of acute pancreatitis develops breathlessness and bilateral basal crepitations on day 4. What is the most likely diagnosis based on the chest radiography image?

Acute Respiratory Distress Syndrome (ARDS). ***Acute Respiratory Distress Syndrome (ARDS)*** - The chest radiograph shows **bilateral patchy infiltrates** and **diffuse alveolar opacities** consistent with ARDS, especially in the context of **acute pancreatitis** as a known risk factor. - The development of **breathlessness** and **bilateral basal crepitations** (rales) on day 4 further supports ARDS due to fluid accumulation in the lungs. *Bilateral pneumonia* - While pneumonia can cause bilateral infiltrates, the **symmetrical and widespread distribution** seen on this radiograph, combined with the context of acute pancreatitis, makes ARDS a more likely diagnosis. - Pneumonia typically presents with fever, productive cough, and lung consolidation, which are not specifically highlighted as primary symptoms over the breathlessness. *Carcinogenic Pulmonary Embolism* - Pulmonary embolism typically manifests with **sudden onset dyspnea**, pleuritic chest pain, and sometimes hemoptysis, and chest X-rays are often normal or show subtle findings like a **Westermark sign** or Hampton's hump. - The widespread bilateral infiltrates seen in the image are **not characteristic of pulmonary embolism**. *Lung collapse (atelectasis)* - Atelectasis usually appears as a ** localised area of increased opacification**, often with volume loss (e.g., tracheal deviation, elevated hemidiaphragm), and is often unilateral or segmental. - The **diffuse, bilateral, and often fluffy infiltrates** seen in this image are not consistent with typical atelectasis.

Q: Which of the following is least likely to be associated with allergic bronchopulmonary aspergillosis (ABPA)?

Pleural effusion. ***Pleural effusion*** - **Pleural effusions** are rare in ABPA because it is primarily an airway disease, affecting the bronchi and parenchyma, not typically the pleura. - While other conditions causing lung disease can lead to pleural effusions, ABPA itself does not commonly involve the development of **fluid in the pleural space**. *Occurrence in patients with old cavitary lesions* - ABPA can sometimes occur in patients with pre-existing lung conditions, including those with old cavitary lesions, especially if these lesions create an environment conducive to **fungal growth**. - However, **aspergilloma** (a fungal ball within a cavity) is more directly associated with cavitary lesions, distinct from the allergic reaction of ABPA [1]. *Elevated IgE levels* - **Elevated serum total IgE levels** (typically >1000 IU/mL) are a key diagnostic criterion for ABPA, indicating a significant allergic response. - Both **total IgE** and **Aspergillus-specific IgE** are characteristically high due to the hypersensitivity reaction. *Recurrent respiratory symptoms* - Patients with ABPA frequently experience **recurrent respiratory symptoms** such as **wheezing**, **cough**, and **dyspnea** due to inflammation and bronchospasm. - These recurrent symptoms contribute to progressive lung damage if the condition is not adequately managed.

Q: What does a decreased FEV1/FVC ratio typically indicate in pulmonary function tests?

Obstructive lung disease. ***Obstructive lung disease*** - A decreased **FEV1/FVC ratio** indicates that the amount of air forcefully exhaled in one second (FEV1) is disproportionately low compared to the total forced vital capacity (FVC) [1]. This is a hallmark of **airflow limitation**, distinguishing obstructive lung diseases. - This pattern suggests a problem with **airway narrowing** or obstruction, making it difficult to exhale air quickly, which is characteristic of conditions like **COPD** (emphysema, chronic bronchitis) or **asthma** [1]. *Normal pulmonary function* - In normal pulmonary function, the **FEV1/FVC ratio** would be within the expected reference range, typically **above 70%** (or 0.7) for adults [1]. - A low ratio explicitly indicates a deviation from normal airflow dynamics, not a state of healthy lung function. *Restrictive lung disease* - **Restrictive lung diseases** are characterized by a **reduced total lung volume** (decreased FVC), but the FEV1/FVC ratio is typically **normal or even increased**. - This is because the airways are generally not obstructed; instead, the problem lies with the lungs' inability to expand fully, leading to a proportional reduction in FEV1 and FVC. *Both obstructive and restrictive lung disease* - While it is possible to have both conditions, a **decreased FEV1/FVC ratio** primarily points to an **obstructive pattern**. - A definitive diagnosis of both would require further interpretation of other PFT parameters such as **total lung capacity (TLC)**, which would be normal or increased in obstruction and reduced in restriction.

Q: Oxygen therapy may not be useful in

Pulmonary fibrosis. **Pulmonary fibrosis** - Oxygen therapy is beneficial in **pulmonary fibrosis**, especially with exercise or at night, as it can significantly improve **oxygen saturation** and relieve **dyspnea**. - While not a cure, it improves quality of life by combating the effects of **scarring** in the lungs. *Asthma* - Oxygen therapy is a critical component in the management of **acute severe asthma** to correct **hypoxemia**. - It is often administered along with **bronchodilators** and **corticosteroids** to stabilize the patient's respiratory status. *Pneumonia* - Oxygen therapy is commonly used in pneumonia patients who develop **hypoxemia** due to impaired gas exchange in affected lung areas. - Supplemental oxygen helps maintain adequate **tissue oxygenation** and can prevent complications from severe respiratory distress. *Subglottic stenosis* - While supplemental oxygen can be administered, the primary intervention for **subglottic stenosis** often involves addressing the **airway obstruction** directly. - The benefit of oxygen therapy alone is limited due to the mechanical restriction of airflow, which may require surgical or interventional procedures.

Q: All of the following may lead to pneumatocele formation except which of the following?

ARDS. ***ARDS*** - **Acute Respiratory Distress Syndrome (ARDS)** is primarily characterized by **inflammatory lung injury**, leading to **alveolar edema**, but does not typically cause pneumatocele formation [1]. - Pneumatoceles are more likely associated with infections or mechanical ventilation, not with ARDS itself. *Staphylococcal pneumonia* - **Staphylococcal pneumonia** can lead to pneumatocele formation due to **necrotizing pneumonia**, where the formation of air-filled cysts occurs from lung tissue damage. - This type of pneumonia is associated with **Staphylococcus aureus** and can cause cavitary lesions. *Positive pressure ventilation* - **Positive pressure ventilation** can increase the risk of barotrauma, leading to the formation of pneumatocele through excess air entering lung tissue. - It is often used in cases of respiratory distress but can inadvertently contribute to pneumatocele development. *Hydrocarbon inhalation* - **Hydrocarbon inhalation** is linked to pneumonitis and can cause lung injury, leading to the formation of **pneumatoceles** as a result of **lung inflammation**. - Such inhalation can create **alveolar damage**, allowing for air-filled spaces to develop.

Q: Central bronchiectasis is seen with

Cystic fibrosis. ***Cystic fibrosis*** - **Cystic Fibrosis (CF)** is a genetic disorder commonly associated with **central bronchiectasis**, particularly affecting the upper lobes and central airways. - The abnormal mucus production in CF leads to chronic infection, inflammation, and eventual **dilation of the bronchi**, prominent in the central regions. *Bronchogenic carcinoma* - **Bronchogenic carcinoma** can cause **post-obstructive bronchiectasis** distal to the tumor due to airway obstruction and reduced clearance. - However, the bronchiectasis tends to be **localized** to the segment supplied by the obstructed bronchus, rather than being diffusely central. *Tuberculosis* - **Tuberculosis (TB)** can lead to bronchiectasis, often affecting the **upper lobes** and causing localized airway damage. - While TB can cause changes in the bronchi, it is typically linked with **focal or segmental bronchiectasis** resulting from inflammatory destruction, not diffuse central bronchiectasis like CF. *Cystic Adenomatoid Malformation (CAM)* - **Cystic Adenomatoid Malformation (CAM)** is a **congenital lung lesion** with abnormal airway development, but it does not primarily involve bronchiectasis. - CAM is characterized by **cystic structures** or abnormal lung tissue, not the permanent dilation of the bronchi seen in typical bronchiectasis.

Question 1

Samters triad is seen in patients with ?

Accepted Answer

Asthma

Answer

Chronic pancreatitis

Answer

Crohn's disease

Answer

Liver cell carcinoma

Question 2

Upper lobe bronchiectasis is seen in which disease?

Accepted Answer

Cystic fibrosis

Answer

Tuberculosis

Answer

Allergic Bronchopulmonary Aspergillosis (ABPA)

Answer

Silicosis

Question 3

A male patient presents to the emergency department. The arterial blood gas report is as follows: pH, 7.2; pCO2, 81 mmHg; and HCO3, 40 meq/L. Which of the following is the most likely diagnosis?

Accepted Answer

Respiratory acidosis

Answer

Respiratory alkalosis

Answer

Metabolic acidosis

Answer

Metabolic alkalosis

Question 4

A patient with a history of carcinoma of the bladder presents with dyspnoea, clinical signs of deep vein thrombosis (DVT), and tachycardia. Based on the Wells score for pulmonary embolism, what is the risk classification for this patient?

Accepted Answer

Moderate risk for pulmonary embolism

Answer

Insufficient data to assess risk

Answer

Low risk for pulmonary embolism

Answer

High risk for pulmonary embolism

Question 5

A patient with a known case of acute pancreatitis develops breathlessness and bilateral basal crepitations on day 4. What is the most likely diagnosis based on the chest radiography image?

Accepted Answer

Acute Respiratory Distress Syndrome (ARDS)

Answer

Bilateral pneumonia

Answer

Carcinogenic Pulmonary Embolism

Answer

Lung collapse (atelectasis)

Question 6

Which of the following is least likely to be associated with allergic bronchopulmonary aspergillosis (ABPA)?

Accepted Answer

Pleural effusion

Answer

Occurrence in patients with old cavitary lesions

Answer

Elevated IgE levels

Answer

Recurrent respiratory symptoms

Question 7

What does a decreased FEV1/FVC ratio typically indicate in pulmonary function tests?

Accepted Answer

Obstructive lung disease

Answer

Normal pulmonary function

Answer

Restrictive lung disease

Answer

Both obstructive and restrictive lung disease

Question 8

Oxygen therapy may not be useful in

Accepted Answer

Pulmonary fibrosis

Answer

Pneumonia

Answer

Subglottic stenosis

Answer

Asthma

Question 9

All of the following may lead to pneumatocele formation except which of the following?

Accepted Answer

ARDS

Answer

Staphylococcal pneumonia

Answer

Positive pressure ventilation

Answer

Hydrocarbon inhalation

Question 10

Central bronchiectasis is seen with

Accepted Answer

Cystic fibrosis

Answer

Tuberculosis

Answer

Bronchogenic carcinoma

Answer

Cystic Adenomatoid Malformation (CAM)

Pulmonology — MCQs

Pulmonology — MCQs

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