A 55-year-old with suspected ILD has restrictive PFTs and reticular opacities; oxygen saturation drops with exertion. Which management is most appropriate now?
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USMLE Step 2 Quiz
Practice Obstructive And Restrictive Lung Disease in USMLE Step 2 with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.
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A 55-year-old with suspected ILD has restrictive PFTs and reticular opacities; oxygen saturation drops with exertion. Which management is most appropriate now?
This quiz focuses on Obstructive And Restrictive Lung Disease, giving you a quick way to practice the rules, question types, and explanations that matter most for USMLE Step 2.
Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.
A 55-year-old with suspected ILD has restrictive PFTs and reticular opacities; oxygen saturation drops with exertion. Which management is most appropriate now?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest interstitial lung disease. The referral to pulmonology for ILD evaluation and monitoring is appropriate due to desaturation indicating severity. Choice A is correct because it aligns with ATS guidelines for managing progressive ILD. Choice B is incorrect because it fails to consider that LABA is for obstructive diseases. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 65-year-old smoker has chronic cough and dyspnea; spirometry shows FEV1/FVC 0.65. Which interpretation is most accurate?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest COPD. The obstructive defect consistent with COPD physiology is appropriate due to the low FEV1/FVC ratio. Choice A is correct because it aligns with GOLD spirometric criteria for COPD. Choice B is incorrect because it fails to consider that restrictive defects have normal or high FEV1/FVC. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 70-year-old asbestos-exposed patient has progressive dyspnea and crackles; CXR shows interstitial markings. Which is the most likely diagnosis?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest asbestosis. The asbestosis causing restrictive interstitial lung disease is appropriate due to exposure and imaging findings. Choice A is correct because it aligns with ATS criteria for asbestos-related ILD. Choice B is incorrect because it fails to consider the absence of reversibility and smoking history. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 55-year-old woman has restrictive PFTs and reticular HRCT changes; she reports Raynaud symptoms and joint stiffness. What is the most appropriate next step?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest scleroderma-related ILD. The ANA and other connective tissue serologies are appropriate due to symptoms suggesting autoimmune etiology. Choice A is correct because it aligns with ATS/ERS guidelines for ILD workup in suspected connective tissue disease. Choice B is incorrect because it fails to consider the restrictive pattern inconsistent with obstruction. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 55-year-old woman with suspected ILD has reticular opacities on HRCT and restrictive PFTs. Which additional history is most important to obtain?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest interstitial lung disease. The occupational and home exposures, including birds and mold, are appropriate due to their role in identifying hypersensitivity pneumonitis. Choice A is correct because it aligns with ATS guidelines for ILD history-taking. Choice B is incorrect because it fails to consider that travel history is less relevant for chronic ILD. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 30-year-old woman with intermittent wheeze has 18% FEV1 improvement post-albuterol. Which diagnosis is most likely?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest asthma. The asthma with reversible airflow obstruction pattern is appropriate due to the significant bronchodilator response. Choice A is correct because it aligns with GINA criteria for asthma diagnosis. Choice B is incorrect because it fails to consider the reversibility distinguishing asthma from COPD. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 55-year-old woman with ILD symptoms has restrictive PFTs and HRCT reticulation; she reports bird exposure at home. Which cause is most likely?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest hypersensitivity pneumonitis. The diagnosis of hypersensitivity pneumonitis from avian proteins is appropriate due to the exposure history and restrictive pattern. Choice A is correct because it aligns with ATS guidelines for ILD evaluation emphasizing environmental triggers. Choice B is incorrect because it fails to consider the absence of smoking history or typical emphysema features. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 30-year-old woman has nighttime cough and wheeze twice weekly; spirometry is normal today. Which test best confirms suspected asthma?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest asthma. The methacholine challenge with spirometric monitoring is appropriate due to its sensitivity in detecting airway hyperresponsiveness when baseline spirometry is normal. Choice A is correct because it aligns with GINA guidelines for confirming asthma in equivocal cases. Choice B is incorrect because it fails to consider that HRCT is not first-line for suspected asthma. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 55-year-old woman with progressive dyspnea and dry cough has bibasilar crackles; PFT shows low TLC with normal FEV1/FVC; HRCT shows reticular opacities. Next step?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest interstitial lung disease. The autoimmune serologies and exposure review are appropriate due to the need to identify underlying causes like connective tissue disease or hypersensitivity. Choice B is correct because it aligns with ATS/ERS guidelines for evaluating suspected ILD. Choice A is incorrect because it fails to consider the restrictive pattern requiring further diagnostic workup beyond empiric treatment. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 30-year-old with suspected asthma has symptoms with cat exposure; spirometry normal today. Which treatment is most appropriate to initiate now?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest allergic asthma. The low-dose inhaled corticosteroid plus rescue SABA is appropriate due to its efficacy in mild asthma with triggers. Choice A is correct because it aligns with GINA guidelines for step 1 or 2 asthma therapy. Choice B is incorrect because it fails to consider that long-term oxygen is for severe hypoxemia, not mild asthma. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 55-year-old woman has progressive dyspnea; exam shows fine crackles; PFT shows restriction; HRCT shows reticular opacities. Which finding supports restrictive disease?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest interstitial lung disease. The decreased TLC with preserved FEV1/FVC ratio is appropriate due to its hallmark of restrictive physiology. Choice C is correct because it aligns with ATS/ERS criteria for restrictive lung disease. Choice A is incorrect because it fails to consider that increased TLC is seen in obstructive diseases like COPD. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 70-year-old former shipyard worker with asbestos exposure has dry cough, dyspnea, crackles; imaging shows diffuse interstitial thickening and pleural plaques. Most appropriate next test?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest asbestosis. The full PFTs with DLCO measurement are appropriate due to their role in assessing diffusion impairment in interstitial diseases. Choice A is correct because it aligns with ATS guidelines for evaluating asbestos-related lung disease. Choice B is incorrect because it fails to consider the restrictive pattern inconsistent with COPD. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 30-year-old with exercise-induced wheeze has reversible obstruction on spirometry. Which initial controller therapy is most appropriate?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest mild persistent asthma. The low-dose inhaled corticosteroid daily regimen is appropriate due to its anti-inflammatory effects for controller therapy. Choice A is correct because it aligns with GINA guidelines for initial asthma control. Choice B is incorrect because it fails to consider that LABA monotherapy is not recommended without ICS in asthma. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 70-year-old with asbestos exposure has restrictive PFTs and low DLCO; exam shows crackles. Which imaging finding most supports asbestosis?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest asbestosis. The pleural plaques with basilar interstitial fibrosis are appropriate due to their characteristic appearance in asbestos-related disease. Choice A is correct because it aligns with ATS diagnostic criteria for asbestosis. Choice B is incorrect because it fails to consider that upper lobe cavities are more typical of tuberculosis. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 65-year-old smoker has COPD symptoms; spirometry shows FEV1/FVC 0.60; he continues smoking. Which intervention most improves long-term mortality?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest COPD. The smoking cessation with pharmacotherapy and counseling is appropriate due to its proven impact on slowing disease progression. Choice A is correct because it aligns with GOLD guidelines emphasizing smoking cessation as the most effective intervention. Choice B is incorrect because it fails to consider that ICS monotherapy is not first-line for all COPD patients. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 70-year-old with asbestos exposure has progressive dyspnea; PFT shows low TLC and low DLCO; exam reveals crackles. Which treatment is most appropriate?
Explanation: This question tests USMLE Step 2 CK knowledge of obstructive and restrictive lung disease, focusing on diagnosis and management. Pulmonary function tests differentiate between obstructive (e.g., COPD, asthma) and restrictive diseases (e.g., pulmonary fibrosis, interstitial lung disease) based on FEV1/FVC ratios. In this vignette, the patient's history and spirometry results suggest asbestosis. The smoking cessation counseling and routine vaccinations are appropriate due to their role in preventing complications in restrictive lung disease. Choice A is correct because it aligns with ATS guidelines for managing asbestos-related ILD. Choice B is incorrect because it fails to consider the risks of long-term oral steroids in non-inflammatory ILD. Teach students to assess spirometry results carefully and consider patient history, such as smoking status or occupational exposures, when forming a differential diagnosis. Encourage familiarity with guidelines for common pulmonary conditions.
A 40-year-old non-smoker is diagnosed with emphysema. His chest CT scan shows panacinar emphysema, predominantly in the lower lobes. His sister was also diagnosed with emphysema at a young age. He has mildly elevated liver enzymes.
Which of the following is the most likely underlying condition?
Explanation: The development of emphysema in a young non-smoker, particularly with a basilar-predominant, panacinar pattern, is highly suggestive of alpha-1 antitrypsin (AAT) deficiency. AAT is a protein that protects the lungs from damage by neutrophil elastase. Its deficiency leads to unchecked elastin destruction and early-onset emphysema. The associated liver enzyme elevation is due to the accumulation of abnormal AAT protein in hepatocytes, which can lead to cirrhosis.
A 62-year-old woman with a history of both severe, long-standing rheumatoid arthritis and a 30-pack-year smoking history presents with dyspnea. Pulmonary function tests are performed. The FEV1/FVC ratio is 62% of predicted. The total lung capacity (TLC) is 72% of predicted.
Which of the following best describes this patient's pulmonary function?
Explanation: This patient has risk factors for both obstructive disease (smoking leading to COPD) and restrictive disease (rheumatoid arthritis can cause interstitial lung disease). The PFTs confirm this. The FEV1/FVC ratio < 0.70 indicates an obstructive defect. The total lung capacity (TLC) < 80% of predicted indicates a restrictive defect. The presence of both defines a mixed obstructive and restrictive pattern.
A 25-year-old man with a history of poorly controlled asthma and allergic rhinitis presents with a cough productive of thick, brown mucus plugs. He also reports recurrent episodes of wheezing and shortness of breath. A chest x-ray shows transient pulmonary infiltrates and central bronchiectasis. His total eosinophil count is 1200/µL.
Which of the following is the most likely diagnosis?
Explanation: Allergic bronchopulmonary aspergillosis (ABPA) is a hypersensitivity reaction to Aspergillus fumigatus that occurs almost exclusively in patients with asthma or cystic fibrosis. The clinical picture includes poorly controlled asthma, production of brownish mucus plugs, fleeting pulmonary infiltrates, central bronchiectasis, peripheral eosinophilia, and markedly elevated total serum IgE levels. This patient's presentation is classic for ABPA.
A 16-year-old soccer player reports that after 10-15 minutes of intense running, he develops a dry cough, chest tightness, and shortness of breath. The symptoms typically resolve within 30-60 minutes after he stops exercising. He has no symptoms at rest or at night. Spirometry performed in the clinic is normal.
Which of the following is the most appropriate initial treatment for this patient?
Explanation: This patient's symptoms are classic for exercise-induced bronchoconstriction (EIB). The first-line treatment for EIB is the prophylactic use of a short-acting beta-agonist (SABA), such as albuterol, taken 10-20 minutes before exercise. This prevents the bronchoconstriction triggered by exertion. Daily controller medications like ICS or leukotriene antagonists are considered if symptoms persist despite pre-treatment with a SABA or if the patient also has persistent asthma.