Pulmonology — MCQs
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Which of the following conditions is most commonly associated with a left-sided pleural effusion?
A 60-year-old obese male with a history of chronic smoking presents to the ICU with a pelvic fracture. On the 4th day of ICU stay, he develops sudden tachypnea, decreased SpO2, and hypotension. Echocardiography reveals right ventricular dilation and tricuspid regurgitation. What is the most appropriate next step in management?
Profuse expectoration of two months duration and clubbing may be seen in which of the following conditions?
A 50-year-old patient with long-standing chronic obstructive lung disease develops insidious onset of aching in the distal extremities, particularly the wrists bilaterally. There is a 9 kg weight loss. The skin over the wrists is warm and erythematous. There is bilateral clubbing. Plain film shows periosteal thickening, suggestive of osteomyelitis. What is the next best step in management?
A 25-year-old female presents with progressive dyspnea for one year. CXR shows interstitial opacities and spirometry shows an obstructive pattern. What is the diagnosis?
A 56-year-old man presents with a non-productive cough for 4 weeks. The most noticeable signs were grade III clubbing and a lesion in the apical lobe on X-ray. What is the most likely diagnosis?
Comment on the diagnosis based on spirometry findings: TLC = 75% of predicted, FRC = 100% of predicted, RV = 120% of predicted, FEV1 = 60% of predicted, DLco = 80% of predicted.
Which of the following statements is NOT true about chronic obstructive pulmonary disease?
A 70-year-old male smoker presents with cough and sputum production, but is afebrile. Lung examination reveals left-sided crackles, rhonchi, and egophony in the left upper lobe. The patient is being treated for an acute exacerbation of chronic bronchitis, and sputum is negative for AFB. What is the most likely cause of the observed chest X-ray findings in the left upper lobe?
Cryptogenic organizing pneumonia is characterized by all of the following except?
Pulmonology Indian Medical PG Practice Questions and MCQs
Question 581: Which of the following conditions is most commonly associated with a left-sided pleural effusion?
- A. Pancreatitis (Correct Answer)
- B. Rheumatoid arthritis
- C. Hypoproteinemia
- D. Congestive cardiac failure
Explanation: **Explanation:** The correct answer is **Pancreatitis**. Pleural effusion in acute pancreatitis occurs in approximately 15–20% of cases. It is typically **left-sided** because the tail of the pancreas lies in close proximity to the left diaphragm [1]. Inflammatory exudate and pancreatic enzymes reach the pleural space via transdiaphragmatic lymphatics or through direct fistulous tracts (pancreaticopleural fistula), leading to an exudative effusion with high amylase levels [1]. **Analysis of Incorrect Options:** * **Rheumatoid Arthritis:** While it can cause a left-sided effusion, it is more commonly **unilateral (either side)** or bilateral. It is classically associated with very low glucose levels and high LDH. * **Hypoproteinemia:** Conditions like nephrotic syndrome or cirrhosis cause **bilateral** transudative effusions due to decreased oncotic pressure. If unilateral, it more frequently involves the right side. * **Congestive Cardiac Failure (CCF):** This is the most common cause of pleural effusion overall. It typically presents as **bilateral** effusions. If unilateral, it is significantly more common on the **right side**. **NEET-PG High-Yield Pearls:** * **Right-sided effusions:** Associated with CCF (if unilateral), Liver Cirrhosis (Hepatic Hydrothorax), and Meigs’ Syndrome. * **Left-sided effusions:** Associated with Pancreatitis, Boerhaave syndrome (esophageal rupture), and Splenic infarction. * **Diagnostic Marker:** A pleural fluid amylase level higher than the serum amylase level is highly suggestive of pancreatitis, esophageal rupture, or malignancy.
Question 582: A 60-year-old obese male with a history of chronic smoking presents to the ICU with a pelvic fracture. On the 4th day of ICU stay, he develops sudden tachypnea, decreased SpO2, and hypotension. Echocardiography reveals right ventricular dilation and tricuspid regurgitation. What is the most appropriate next step in management?
- A. D-dimer assay
- B. Administration of heparin
- C. Pericardiocentesis
- D. Systemic thrombolysis (Correct Answer)
Explanation: ### Explanation The clinical presentation describes a classic case of **Massive Pulmonary Embolism (PE)**. The patient has multiple risk factors (obesity, smoking, immobilization due to pelvic fracture). The sudden onset of tachypnea and hypoxia, coupled with **hypotension (hemodynamic instability)** and echocardiographic evidence of **Right Ventricular (RV) strain**, confirms the diagnosis of High-Risk (Massive) PE [1]. **1. Why Systemic Thrombolysis is Correct:** In patients with PE, the presence of **hypotension** (Systolic BP <90 mmHg or a drop of ≥40 mmHg for >15 mins) defines it as **Massive PE**. The primary goal is to rapidly dissolve the clot to relieve RV afterload and restore systemic circulation. Systemic thrombolysis (e.g., Alteplase) is the first-line treatment in hemodynamically unstable patients unless absolute contraindications exist [2]. **2. Why Other Options are Incorrect:** * **D-dimer assay:** This is a screening tool with high negative predictive value. In a high-probability, life-threatening emergency like this, a D-dimer is unnecessary and delays life-saving treatment [1]. * **Administration of heparin:** While anticoagulation is the mainstay for *stable* (Low-risk) PE, it does not actively dissolve the existing clot. In the presence of shock, heparin alone is insufficient. * **Pericardiocentesis:** This is the treatment for cardiac tamponade [1]. While tamponade also causes hypotension and RV collapse, the history of trauma/immobilization and RV *dilation* (not collapse) points specifically to PE. **Clinical Pearls for NEET-PG:** * **Gold Standard Diagnosis:** CT Pulmonary Angiography (CTPA) [1]. * **McConnell’s Sign:** A specific Echo finding in PE showing akinesia of the RV free wall with sparing of the apex. * **S1Q3T3 Pattern:** The classic (though infrequent) ECG finding: deep S wave in Lead I, Q wave in Lead III, and inverted T wave in Lead III [1]. * **Treatment Strategy:** * Hemodynamically Stable → Anticoagulation (LMWH/Fondaparinux). * Hemodynamically Unstable → Thrombolysis [2].
Question 583: Profuse expectoration of two months duration and clubbing may be seen in which of the following conditions?
- A. Sarcoidosis
- B. Polyarteritis nodosa
- C. Pulmonary artery hypertension
- D. Allergic bronchopulmonary aspergillosis (Correct Answer)
Explanation: The clinical presentation of **profuse expectoration** (productive cough) and **digital clubbing** suggests a chronic inflammatory or suppurative lung disease. **1. Why Allergic Bronchopulmonary Aspergillosis (ABPA) is correct:** ABPA is a hypersensitivity reaction to *Aspergillus fumigatus* colonization in the airways, typically seen in patients with asthma or cystic fibrosis. The hallmark of ABPA is **central bronchiectasis**. Bronchiectasis leads to the permanent dilation of airways, causing impaired mucociliary clearance, recurrent infections, and **profuse expectoration** (often with "brownish plugs"). Chronic hypoxia and suppurative inflammation associated with bronchiectasis are classic causes of **clubbing** [1]. **2. Why the other options are incorrect:** * **Sarcoidosis:** While it can cause restrictive lung disease and dry cough, it rarely presents with profuse expectoration. Clubbing is uncommon in sarcoidosis unless there is advanced stage IV pulmonary fibrosis [2]. * **Polyarteritis Nodosa (PAN):** This is a systemic necrotizing vasculitis that typically **spares the lungs**. Pulmonary involvement is a "red flag" that suggests other vasculitides like Granulomatosis with polyangiitis (GPA) or Eosinophilic granulomatosis with polyangiitis (EGPA). * **Pulmonary Artery Hypertension (PAH):** PAH presents with exertional dyspnea, chest pain, and signs of right heart failure. It does not cause profuse expectoration or clubbing (unless secondary to underlying chronic lung disease). **Clinical Pearls for NEET-PG:** * **ABPA Diagnostic Criteria:** Asthma, immediate skin reactivity to *Aspergillus*, elevated total serum IgE (>1000 IU/mL), and central bronchiectasis on CT ("finger-in-glove" appearance). * **Clubbing in Pulmonology:** Finger clubbing suggests bronchial carcinoma or bronchiectasis; other signs of malignancy, such as cachexia, hepatomegaly and lymphadenopathy, should also be sought [1]. * **High-Yield:** Sarcoidosis is classically associated with bilateral hilar lymphadenopathy and non-caseating granulomas, not profuse sputum.
Question 584: A 50-year-old patient with long-standing chronic obstructive lung disease develops insidious onset of aching in the distal extremities, particularly the wrists bilaterally. There is a 9 kg weight loss. The skin over the wrists is warm and erythematous. There is bilateral clubbing. Plain film shows periosteal thickening, suggestive of osteomyelitis. What is the next best step in management?
- A. Start ciprofloxacin
- B. Obtain chest x-ray (Correct Answer)
- C. Aspirate both wrists
- D. Begin gold therapy
Explanation: ### Explanation The clinical presentation of bilateral distal extremity pain, warmth, erythema, and clubbing in a patient with a history of lung disease and significant weight loss is classic for **Hypertrophic Osteoarthropathy (HOA)** [1]. **1. Why "Obtain chest x-ray" is correct:** The patient is exhibiting **Hypertrophic Pulmonary Osteoarthropathy (HPOA)**, a subset of HOA. While HPOA can be associated with chronic lung diseases (like COPD/Bronchiectasis), the **insidious onset of weight loss (9 kg)** in a 50-year-old smoker is a major "red flag" for **Bronchogenic Carcinoma** (most commonly Adenocarcinoma). The "periosteal thickening" seen on X-ray is the hallmark of HPOA, not infection. A chest X-ray is the most appropriate next step to screen for an underlying malignancy, which often triggers this paraneoplastic syndrome. **2. Why other options are incorrect:** * **A & C (Ciprofloxacin/Aspiration):** These are treatments for osteomyelitis or septic arthritis. While the X-ray mentioned "suggestive of osteomyelitis," the **bilateral, symmetrical** involvement [1] and presence of **clubbing** strongly point toward a systemic/paraneoplastic process rather than a localized infection. * **D (Gold therapy):** This was historically used for Rheumatoid Arthritis (RA). While HOA can mimic RA, the presence of clubbing and the periosteal reaction on X-ray are not features of RA. **3. High-Yield Clinical Pearls for NEET-PG:** * **Triad of HPOA:** Digital clubbing, symmetrical arthritis/arthralgia, and periostitis of distal long bones. * **Most common cause:** Primary lung malignancy (Adenocarcinoma is the most frequent association). * **Radiological Hallmark:** "Tram-track" sign or periosteal new bone formation along the shafts of long bones (distal tibia, fibula, radius, ulna). * **Management:** The definitive treatment for HPOA is treating the underlying cause [1]. NSAIDs can be used for symptomatic relief [1].
Question 585: A 25-year-old female presents with progressive dyspnea for one year. CXR shows interstitial opacities and spirometry shows an obstructive pattern. What is the diagnosis?
- A. Non-specific interstitial pneumonitis
- B. Pulmonary Lymphangioleiomyomatosis (Correct Answer)
- C. Idiopathic pulmonary fibrosis
- D. Pulmonary Alveolar Proteinosis
Explanation: ### **Explanation** The correct answer is **Pulmonary Lymphangioleiomyomatosis (LAM)**. **Why it is correct:** LAM is a rare cystic lung disease that almost exclusively affects **young females** of childbearing age. It is characterized by the proliferation of atypical smooth muscle cells (LAM cells) around airways, blood vessels, and lymphatics. * **The Paradox:** While most interstitial lung diseases (ILDs) present with a restrictive pattern [1], LAM is a classic exception. The proliferation of smooth muscle cells leads to airway obstruction and air trapping, resulting in an **obstructive pattern** on spirometry. * **Radiology:** CXR shows interstitial opacities [1], but HRCT is diagnostic, showing characteristic thin-walled, diffuse, bilateral **round cysts**. **Why other options are incorrect:** * **A & C (NSIP and IPF):** These are typical Interstitial Lung Diseases. They present with a **restrictive pattern** (decreased FVC, increased FEV1/FVC ratio) [1] rather than an obstructive one. IPF is also more common in older males. * **D (Pulmonary Alveolar Proteinosis):** This presents with a "Crazy Paving" pattern on HRCT and typically shows a **restrictive or normal** spirometry pattern [2]. **High-Yield Clinical Pearls for NEET-PG:** 1. **Obstructive Pattern in ILD:** Remember the mnemonic **"LCH"** (LAM, Langerhans Cell Histiocytosis, and Sarcoidosis/Hypersensitivity Pneumonitis in some stages). 2. **Associations:** LAM is strongly associated with **Tuberous Sclerosis Complex (TSC)** and renal **Angiomyolipomas**. 3. **Complications:** Recurrent pneumothorax and chylous pleural effusion are common. 4. **Biomarker:** Elevated **VEGF-D** levels are highly specific for LAM. 5. **Treatment:** Sirolimus (mTOR inhibitor) is the drug of choice.
Question 586: A 56-year-old man presents with a non-productive cough for 4 weeks. The most noticeable signs were grade III clubbing and a lesion in the apical lobe on X-ray. What is the most likely diagnosis?
- A. Non-small cell carcinoma (Correct Answer)
- B. Small cell carcinoma
- C. Cryptococcal pneumonia
- D. Tuberculosis
Explanation: ### Explanation **Correct Option: A. Non-small cell carcinoma (NSCLC)** The clinical presentation of a chronic cough, an apical lung lesion, and **Grade III digital clubbing** strongly points toward a primary lung malignancy [1]. Among lung cancers, **Non-small cell carcinoma** (specifically Adenocarcinoma and Squamous cell carcinoma) is the most common cause of hypertrophic pulmonary osteoarthropathy and significant clubbing [1]. While Squamous cell carcinoma often presents centrally, Adenocarcinoma is frequently peripheral and can occur in the apex [2]. **Why other options are incorrect:** * **B. Small cell carcinoma:** This typically presents as a central/hilar mass with rapid doubling time. Importantly, Small cell carcinoma is **rarely associated with clubbing**; it is more commonly associated with paraneoplastic syndromes like SIADH or Cushing’s syndrome [1]. * **C. Cryptococcal pneumonia:** This is an opportunistic fungal infection usually seen in immunocompromised patients. While it can cause nodules, it does not typically cause grade III clubbing. * **D. Tuberculosis:** Although TB is a common cause of apical lesions (cavitary) and chronic cough in India, it is a **rare cause of digital clubbing**. The presence of advanced clubbing in a smoker with an apical mass should always prioritize malignancy over TB in a NEET-PG context [1]. **High-Yield Clinical Pearls for NEET-PG:** * **Clubbing in Lung Cancer:** Most commonly associated with NSCLC (Adenocarcinoma > Squamous cell). It is exceptionally rare in Small Cell Lung Cancer [1]. * **Pancoast Tumor:** A subset of NSCLC (usually Squamous or Adeno) located at the superior sulcus (apex) that can cause Horner’s syndrome and brachial plexus involvement. * **Grades of Clubbing:** Grade III involves an increase in all diameters of the distal phalanx (parrot-beak appearance). * **Differential for Apical Lesion:** Remember the mnemonic **"TOP"** (Tuberculosis, Occupational/Silicosis, Pancoast tumor). The presence of clubbing is the "tie-breaker" favoring malignancy.
Question 587: Comment on the diagnosis based on spirometry findings: TLC = 75% of predicted, FRC = 100% of predicted, RV = 120% of predicted, FEV1 = 60% of predicted, DLco = 80% of predicted.
- A. Acute asthma
- B. Emphysema
- C. Pulmonary fibrosis
- D. Myasthenia gravis (Correct Answer)
Explanation: ### **Explanation** This question tests the ability to differentiate between obstructive, restrictive, and neuromuscular patterns using lung volumes and DLco. **1. Why Myasthenia Gravis is correct:** Myasthenia Gravis (MG) causes **extrapulmonary restrictive lung disease** due to respiratory muscle weakness. * **TLC (75%):** Reduced, indicating a restrictive pattern. * **RV (120%) & FRC (100%):** In neuromuscular disorders, the muscles of expiration are weak, preventing the patient from exhaling fully. This leads to an **increased Residual Volume (RV)** despite a low Total Lung Capacity (TLC). * **DLco (80%):** Normal. Since the lung parenchyma and vasculature are intact, gas exchange remains unaffected. This "normal DLco with low TLC" is a classic hallmark of neuromuscular or chest wall disorders. **2. Why the other options are wrong:** * **Acute Asthma:** This is an obstructive disease. You would expect a decreased FEV1/FVC ratio and an increased TLC/FRC due to air trapping, not a reduced TLC [1]. * **Emphysema:** While RV is increased due to air trapping, the **DLco is characteristically decreased** due to alveolar wall destruction. TLC is typically increased (hyperinflation). * **Pulmonary Fibrosis:** This is an intrapulmonary restrictive disease. While TLC is low, the **RV is also decreased** (the "shrunken lung"), and **DLco is significantly reduced** due to the thickened alveolar-capillary membrane [2]. **3. Clinical Pearls for NEET-PG:** * **Neuromuscular Pattern:** ↓ TLC + ↑ RV + Normal DLco. * **Parenchymal Restrictive (Fibrosis):** ↓ TLC + ↓ RV + ↓ DLco [2]. * **Obstructive (Emphysema):** ↑ TLC + ↑ RV + ↓ DLco. * **MIP and MEP:** In suspected Myasthenia Gravis, the most sensitive bedside tests for respiratory involvement are **Maximal Inspiratory Pressure (MIP)** and **Maximal Expiratory Pressure (MEP)**.
Question 588: Which of the following statements is NOT true about chronic obstructive pulmonary disease?
- A. FEV1 is less than 30% of the predicted value
- B. FEV1/FVC ratio is less than 0.7
- C. Residual volume is decreased (Correct Answer)
- D. Total lung capacity is increased
Explanation: **Explanation:** Chronic Obstructive Pulmonary Disease (COPD) is characterized by persistent airflow limitation that is usually progressive [3]. The pathophysiology involves airway narrowing (chronic bronchitis) and loss of elastic recoil due to alveolar destruction (emphysema) [2]. **Why Option C is correct (The False Statement):** In COPD, patients suffer from **air trapping** and **hyperinflation**. Because the airways collapse during expiration, air remains trapped in the distal airspaces [2]. This leads to an **increase in Residual Volume (RV)** and Functional Residual Capacity (FRC), not a decrease [2]. Therefore, the statement that RV is decreased is incorrect. **Analysis of Incorrect Options:** * **Option A (FEV1 < 30%):** This is a true clinical possibility. According to GOLD guidelines, an FEV1 < 30% predicted signifies "GOLD 4" or **Very Severe** airflow limitation [4]. * **Option B (FEV1/FVC < 0.7):** This is the **hallmark of obstructive lung disease**. A post-bronchodilator FEV1/FVC ratio of less than 0.70 is the mandatory diagnostic criterion for COPD, confirming persistent airflow limitation [1]. * **Option D (TLC is increased):** Due to the loss of elastic recoil (especially in emphysema) and significant air trapping, the lungs become hyperinflated, leading to an **increased Total Lung Capacity (TLC)** [2]. **High-Yield NEET-PG Pearls:** * **PFT Pattern:** ↓ FEV1, ↓ FVC, **↓↓ FEV1/FVC ratio**, ↑ RV, and ↑ TLC. * **DLCO:** Decreased in emphysema (due to alveolar destruction) but usually normal in pure chronic bronchitis. * **Flow-Volume Loop:** Shows a characteristic **"scooped-out"** appearance during expiration [1]. * **Pink Puffers vs. Blue Bloaters:** Emphysema-dominant patients (Pink Puffers) maintain oxygenation by hyperventilating, while Bronchitis-dominant patients (Blue Bloaters) are often cyanotic and edematous.
Question 589: A 70-year-old male smoker presents with cough and sputum production, but is afebrile. Lung examination reveals left-sided crackles, rhonchi, and egophony in the left upper lobe. The patient is being treated for an acute exacerbation of chronic bronchitis, and sputum is negative for AFB. What is the most likely cause of the observed chest X-ray findings in the left upper lobe?
- A. Chronic bronchitis
- B. Left upper lobe pneumonia
- C. Old granulomatous disease (Correct Answer)
- D. Asbestos exposure
Explanation: ***Old granulomatous disease*** - **Healed tuberculosis** commonly causes **fibrotic scarring** and **calcifications** in the left upper lobe, which appear as persistent radiographic changes on chest X-ray. - The **AFB-negative sputum** and **afebrile** presentation rule out active TB, while the **upper lobe predilection** and **chronic radiographic changes** are characteristic of old granulomatous disease. *Chronic bronchitis* - Typically causes **hyperinflation** and **increased bronchovascular markings** throughout both lungs, not localized upper lobe changes. - Does not produce the **consolidation** or **fibrotic changes** that would cause **egophony** and localized crackles in one specific lobe. *Left upper lobe pneumonia* - Would present with **fever**, **acute onset** of symptoms, and **leukocytosis**, which are absent in this afebrile patient. - **Pneumonia** typically shows **acute consolidation** rather than the **chronic fibrotic changes** suggested by the clinical context and imaging findings. *Asbestos exposure* - Primarily causes **bilateral lower lobe fibrosis** and **pleural plaques**, not upper lobe predominant changes. - Associated with **restrictive lung disease** and **pleural effusions**, rather than the upper lobe consolidation pattern described.
Question 590: Cryptogenic organizing pneumonia is characterized by all of the following except?
- A. Migratory pulmonary opacities
- B. Obstructive pattern of pulmonary function (Correct Answer)
- C. Aerial hypoxemia
- D. Good response to corticosteroids
Explanation: Cryptogenic Organizing Pneumonia (COP), formerly known as BOOP (Bronchiolitis Obliterans Organizing Pneumonia), is a form of diffuse interstitial lung disease involving the distal airways and alveoli [1]. **1. Why Option B is the Correct Answer:** COP is fundamentally an **interstitial lung disease (ILD)**. Therefore, the characteristic Pulmonary Function Test (PFT) finding is a **Restrictive pattern**, not an obstructive one [1]. Patients typically show reduced Total Lung Capacity (TLC), reduced Forced Vital Capacity (FVC), and a decreased Diffusion Capacity of the lungs for carbon monoxide (DLCO) [1]. **2. Analysis of Other Options:** * **Option A (Migratory pulmonary opacities):** This is a classic radiological hallmark of COP. On CT/X-ray, patients often show patchy, subpleural, or peribronchovascular consolidations that may "move" or change location over weeks [1]. * **Option C (Arterial hypoxemia):** Due to the filling of alveoli with "Masson bodies" (plugs of connective tissue) and ventilation-perfusion mismatch, resting or exertional hypoxemia is a common clinical finding [1]. * **Option D (Good response to corticosteroids):** COP is highly steroid-sensitive. Most patients show dramatic clinical and radiological improvement within days of starting systemic glucocorticoids, though relapses are common if steroids are tapered too quickly. **NEET-PG High-Yield Pearls:** * **Histology:** Characterized by **Masson bodies** (polypoid plugs of loose connective tissue/fibroblasts) within the alveolar ducts and alveoli. * **Radiology:** Look for the **"Atoll Sign" or "Reverse Halo Sign"** (a central ground-glass opacity surrounded by a denser ring of consolidation). * **Clinical Presentation:** Often mimics community-acquired pneumonia (flu-like symptoms, cough, dyspnea) but fails to respond to multiple courses of antibiotics [1].
Practice by Chapter
Obstructive Airway Diseases (Asthma, COPD)
Practice Questions
Interstitial Lung Diseases
Practice Questions
Pulmonary Infections
Practice Questions
Pulmonary Vascular Diseases
Practice Questions
Pleural Diseases
Practice Questions
Sleep-Disordered Breathing
Practice Questions
Respiratory Failure
Practice Questions
Mediastinal Disorders
Practice Questions
Occupational Lung Diseases
Practice Questions
Pulmonary Function Testing
Practice Questions
Bronchiectasis and Cystic Fibrosis
Practice Questions
Lung Cancer Approach
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