Pulmonology Practice Questions

Q: Which subtype of interstitial lung disease is seen in patients with Sjogren syndrome?

Non-specific interstitial pneumonia. **Explanation:** Interstitial Lung Disease (ILD) is a common extra-glandular manifestation of Sjogren Syndrome, occurring in approximately 10–20% of patients [1]. **Why Non-specific interstitial pneumonia (NSIP) is correct:** NSIP is the most frequent histological and radiological pattern of ILD associated with Sjogren Syndrome (and most other Connective Tissue Diseases, with the notable exception of Rheumatoid Arthritis) [1]. It is characterized by a uniform expansion of alveolar walls by inflammation or fibrosis, typically presenting with a "ground-glass" appearance on HRCT and relative subpleural sparing. **Analysis of Incorrect Options:** * **Usual interstitial pneumonia (UIP):** While UIP is the hallmark of Idiopathic Pulmonary Fibrosis (IPF) and is the most common pattern in **Rheumatoid Arthritis**, it is less common than NSIP in Sjogren Syndrome [1]. * **Acute interstitial pneumonia (AIP):** This is a fulminant form of lung injury (Hamman-Rich syndrome) presenting as ARDS. It is not typically associated with the chronic progression of Sjogren-related ILD. * **Cryptogenic Organizing pneumonia (COP):** While organizing pneumonia can occur in Sjogren patients, it is less frequent than the NSIP pattern. **NEET-PG High-Yield Pearls:** * **Most common ILD in Sjogren:** NSIP [1]. * **Most common ILD in Rheumatoid Arthritis:** UIP [1]. * **Most common ILD in Systemic Sclerosis:** NSIP. * **Lymphocytic Interstitial Pneumonia (LIP):** This is a rare but highly characteristic (pathognomonic) pattern strongly associated with Sjogren Syndrome [1]. If NSIP is not an option, look for LIP. * **HRCT Finding for NSIP:** Ground-glass opacities with subpleural sparing.

Q: In a case of pleural effusion caused by pneumococcal pneumonia, chest tube insertion is indicated in all of the following pleural fluid findings, EXCEPT:

pH > 7.4. This question tests your knowledge of the indications for **Intercostal Drainage (ICD)** or chest tube insertion in cases of parapneumonic effusions. ### **Explanation of the Correct Answer** **Option A (pH > 7.4)** is the correct answer because it indicates a **simple parapneumonic effusion** that is likely to resolve with antibiotics alone [1]. In the setting of pneumonia, a pleural fluid **pH 7.4 is considered normal/alkaline in this context and is a contraindication for routine chest tube insertion. ### **Analysis of Incorrect Options** * **Option B (Frank Pus):** The presence of frank pus defines an **Empyema** [1]. This is an absolute indication for immediate chest tube drainage to prevent loculation and fibrothorax [2]. * **Option C (Culture Positive):** If bacteria are seen on Gram stain or grown in culture, the effusion is "complicated" [1]. This implies that the body's immune system cannot clear the pleural space infection independently, necessitating drainage. ### **NEET-PG High-Yield Pearls** * **Indications for Chest Tube in Parapneumonic Effusion:** 1. Frank pus (Empyema) [1]. 2. Presence of organisms on Gram stain or Culture [1]. 3. Pleural fluid **pH 1000 IU/L**. 6. Loculated pleural fluid on imaging. * **Light’s Criteria:** Used to differentiate exudate from transudate (Exudate if: Protein ratio >0.5, LDH ratio >0.6, or LDH >2/3rd upper limit of normal). Parapneumonic effusions are always **exudates** [1]. * **Most common cause of Empyema:** Historically *S. pneumoniae*, but currently *Staphylococcus aureus* and anaerobes are frequently implicated.

Q: A 29-year-old woman presents with a history of recurrent respiratory tract infections. She has no significant travel history and denies any history of foreign body aspiration. On examination, coarse crackles are noted in the left lower lung zone. A chest X-ray reveals findings suggestive of a possible abnormality. Based on the history and chest X-ray findings, what is the most appropriate next diagnostic step?

Contrast CT scan of the chest and upper abdomen. ***Contrast CT scan of the chest and upper abdomen*** • The combination of **recurrent respiratory infections** in a young patient with **left lower lobe involvement** strongly suggests **pulmonary sequestration**, which requires imaging the **upper abdomen** to detect aberrant **systemic arterial supply** from the **descending/abdominal aorta**. • **Contrast CT** is the gold standard for identifying the **anomalous vascular supply** and defining the anatomy of the sequestered lung tissue, which is essential for surgical planning. *Bronchogram* • This technique is **obsolete** and has been largely replaced by **high-resolution CT** and other advanced imaging modalities. • It involves injecting **contrast material** directly into the bronchial tree, which is **invasive** and provides limited information compared to modern CT imaging. *Bronchoscopy* • While useful for evaluating **airway anatomy** and obtaining tissue samples, it would not identify the **vascular abnormalities** characteristic of pulmonary sequestration. • It is typically performed **after imaging** has established the diagnosis and before surgical intervention, not as the initial diagnostic step. *Determination of serum immunoglobulin levels* • This would be appropriate if suspecting **immunodeficiency** as the cause of recurrent infections, but the **localized left lower lobe** involvement suggests a **structural abnormality** rather than systemic immune dysfunction. • **Immunoglobulin levels** would not explain the specific **radiographic findings** or help identify the underlying anatomical defect.

Q: Which of the following is NOT a feature of allergic bronchopulmonary aspergillosis (ABPA)?

Raised IgA levels. ### Explanation **Allergic Bronchopulmonary Aspergillosis (ABPA)** is a complex hypersensitivity reaction to *Aspergillus fumigatus* that occurs almost exclusively in patients with bronchial asthma or cystic fibrosis [1]. **Why Option D is the correct answer:** In ABPA, the immune response is characterized by **Type I (IgE-mediated)** and **Type III (Immune-complex mediated)** hypersensitivity reactions [1]. Therefore, the hallmark laboratory finding is significantly **raised Total Serum IgE levels** (typically >1000 IU/mL) and specific IgE/IgG against *Aspergillus* [2]. **IgA levels are not typically elevated** or used as a diagnostic criterion for ABPA. **Why the other options are incorrect:** * **A. Bronchial Asthma:** This is a prerequisite for the diagnosis. ABPA presents as poorly controlled asthma with recurrent episodes of wheezing and cough [1]. * **B. Central Bronchiectasis:** This is a pathognomonic radiological feature of ABPA. Unlike post-infectious bronchiectasis which is usually peripheral, ABPA causes "inner two-thirds" or central airway dilation. * **C. Peripheral Eosinophilia:** An absolute eosinophil count (AEC) >500 cells/µL is a major diagnostic criterion, reflecting the systemic Th2-mediated allergic response. --- ### High-Yield Clinical Pearls for NEET-PG: * **Radiological Signs:** Look for **"Finger-in-glove" opacities** (mucoid impaction) and **"Tram-line" shadows** on Chest X-ray. * **High-Attenuation Mucus (HAM):** On CT, mucus plugs that are denser than skeletal muscle are highly specific for ABPA. * **Diagnosis:** Rosenberg-Patterson Criteria are used. The most important screening test is the **Aspergillus skin test** (immediate reactivity) or specific IgE [2]. * **Treatment:** The mainstay is **Oral Corticosteroids** (to reduce inflammation) and **Itraconazole** (to reduce the fungal burden/antigenic stimulus).

Q: Which of the following is not a feature of bronchiectasis?

Non-tuberculous mycobacteria involve the lower lobes. ### Explanation **Correct Answer: D. Non-tuberculous mycobacteria involve the lower lobes** **Why Option D is the correct (incorrect statement):** Non-tuberculous mycobacteria (NTM), specifically the *Mycobacterium avium complex* (MAC), characteristically involve the **middle lobe and the lingula** (often referred to as Lady Windermere syndrome). While NTM can occur in the setting of pre-existing lung disease, it does not typically show a predilection for the lower lobes [1][2]. **Analysis of other options:** * **A. Tree-in-bud appearance:** This is a classic HRCT finding in bronchiectasis. It represents small airway (bronchiolar) impaction with mucus, pus, or fluid, resembling a budding tree. It is highly suggestive of active infectious spread. * **B. Upper lung involvement in Cystic Fibrosis (CF):** CF-related bronchiectasis characteristically begins in the **upper lobes** and progresses downwards [3][4]. This is a high-yield differentiator from other causes like idiopathic bronchiectasis, which often favors the lower lobes. * **C. Oral glucocorticoids for ABPA:** Allergic Bronchopulmonary Aspergillosis (ABPA) typically causes **central (proximal) bronchiectasis**. The mainstay of treatment is oral corticosteroids to reduce the inflammatory response to *Aspergillus* antigens, often combined with Itraconazole [1][2]. **NEET-PG High-Yield Pearls:** 1. **Cartagener Syndrome:** Triad of Situs inversus, Chronic sinusitis, and Bronchiectasis [5]. 2. **Signet Ring Sign:** On HRCT, a dilated bronchus appearing larger than its accompanying pulmonary artery (Broncho-arterial ratio >1). 3. **Tram-track Opacities:** Parallel linear shadows on Chest X-ray representing thickened bronchial walls [1]. 4. **Williams-Campbell Syndrome:** Congenital bronchiectasis due to deficiency of bronchial cartilage. 5. **Mounier-Kuhn Syndrome:** Tracheobronchomegaly.

Q: Pneumothorax is not a usual occurrence with which of the following conditions?

Bronchopulmonary aspergillosis. ### Explanation The correct answer is **C. Bronchopulmonary aspergillosis (ABPA)**. **Why ABPA is the correct answer:** Allergic Bronchopulmonary Aspergillosis (ABPA) is a hypersensitivity reaction to *Aspergillus fumigatus* colonization. It typically results in **central bronchiectasis**, mucus plugging, and eosinophilic pneumonia. While it causes significant airway damage, it does **not** typically lead to the formation of subpleural blebs or distal alveolar rupture required to cause a pneumothorax [2]. In contrast, other fungal conditions like *Pneumocystis jirovecii* are notorious for causing pneumothorax, but ABPA is not. **Analysis of Incorrect Options:** * **Asthma:** Severe exacerbations can lead to air trapping and high intra-alveolar pressure, causing alveolar rupture. Air then dissects along the perivascular sheaths (pneumomediastinum) or into the pleural space (pneumothorax). * **Marfan’s Syndrome:** This connective tissue disorder is a classic risk factor for **primary spontaneous pneumothorax** [1]. Patients often have a tall, thin habitus and are prone to developing apical subpleural blebs due to structural weakness in the lung parenchyma [1]. * **Positive Pressure Ventilation (PPV):** This is a common cause of **iatrogenic barotrauma**. High peak inspiratory pressures can overdistend alveoli, leading to rupture and potentially life-threatening tension pneumothorax [3]. **NEET-PG High-Yield Pearls:** * **Most common cause of secondary spontaneous pneumothorax:** COPD (due to ruptured bullae). * **ABPA Diagnostic Hallmark:** "Finger-in-glove" appearance on Chest X-ray (due to mucoid impaction) and central bronchiectasis on HRCT. * **Catamenial Pneumothorax:** Occurs in relation to menstruation; associated with thoracic endometriosis (usually right-sided). * **Pneumocystis jirovecii (PJP):** The most common cause of spontaneous pneumothorax in HIV/AIDS patients.

Q: A 25-year-old patient presents with an incidental finding of a 2-cm solitary pulmonary nodule in the left lower lobe on a chest X-ray. The patient is asymptomatic and has no significant past medical history. Physical examination is normal. The nodule exhibits a "popcorn ball"-type calcification pattern. What is the most appropriate next step in management?

Serial chest X-rays. **Explanation:** The clinical presentation and radiographic findings are classic for a **Pulmonary Hamartoma**, the most common benign lung tumor. The pathognomonic sign is the **"popcorn" calcification** pattern seen on imaging. **Why Serial Chest X-rays is correct:** In a young, asymptomatic patient with a solitary pulmonary nodule (SPN) exhibiting clearly benign radiological features (like popcorn calcification, fat density on CT, or stability for >2 years), the risk of malignancy is extremely low (<1%). The standard management for a low-risk SPN is **observation with serial imaging** (typically at 3, 6, 12, and 24 months) to confirm stability [1]. If the nodule remains stable for two years, it is considered benign, and no further follow-up is required [1]. **Why the other options are incorrect:** * **A & D (Resection/Pneumonectomy):** Surgical intervention is reserved for nodules with a high probability of malignancy or those that are symptomatic. A pneumonectomy is never indicated for a 2-cm peripheral nodule. * **C (Needle Aspiration Biopsy):** Invasive procedures like FNAC or biopsy are indicated only when the diagnosis is uncertain or the risk of malignancy is intermediate/high. In this case, the "popcorn" calcification is diagnostic of a benign hamartoma, making biopsy unnecessary. **NEET-PG High-Yield Pearls:** * **Hamartoma Triad:** Asymptomatic + Popcorn calcification + Fat density on CT. * **Benign Calcification Patterns:** Popcorn (Hamartoma), Diffuse, Central, or Laminated (Granulomatous disease like TB/Histoplasmosis). * **Malignant Calcification Patterns:** Eccentric or Stippled. * **Size Matters:** Nodules 8 mm require formal risk stratification (Fleischner Society guidelines).

Q: A silent chest is a clinical finding characterized by diminished or absent breath sounds. In which of the following conditions is a silent chest most likely to be observed?

Very severe asthma. ### Explanation **1. Why "Very Severe Asthma" is Correct:** A "silent chest" is a critical clinical sign indicating a life-threatening exacerbation of asthma. It occurs when there is extreme airway obstruction due to severe bronchospasm, mucosal edema, and thick mucus plugging. This leads to such a profound reduction in airflow (minute ventilation) that the air movement is insufficient to generate audible breath sounds or wheezing. In this scenario, the disappearance of a wheeze is an **ominous sign** of impending respiratory failure, rather than a sign of improvement. **2. Why the Other Options are Incorrect:** * **Chronic Bronchitis:** Characterized by a productive cough and "noisy" chest. Auscultation typically reveals coarse crackles and rhonchi due to excessive mucus in the large airways. * **Emphysema:** While breath sounds are often diminished (quiet chest) due to hyperinflation and alveolar destruction, they are rarely completely absent or "silent" unless a complication like pneumothorax occurs. * **Bronchiectasis:** This is a chronic suppurative lung disease. Auscultation typically reveals prominent, coarse crackles (often persistent) and sometimes wheezing, but not a silent chest. **3. Clinical Pearls for NEET-PG:** * **The "Silent" Danger:** In acute asthma, a "silent chest" is often accompanied by other danger signs: cyanosis, bradycardia, exhaustion, and a **normal or rising $PaCO_2$** (indicating the patient can no longer maintain the hyperventilation needed to blow off $CO_2$) [1]. * **Management:** A silent chest is a medical emergency requiring immediate aggressive bronchodilation, systemic corticosteroids, and often ICU admission for ventilatory support [1]. * **Auscultation Rule:** If a patient in respiratory distress has no audible breath sounds, do not assume they are stable; they are likely in **Status Asthmaticus**.

Question 1

Which subtype of interstitial lung disease is seen in patients with Sjogren syndrome?

Accepted Answer

Non-specific interstitial pneumonia

Answer

Usual interstitial pneumonia

Answer

Acute interstitial pneumonia

Answer

Cryptogenic Organizing pneumonia

Question 2

In a case of pleural effusion caused by pneumococcal pneumonia, chest tube insertion is indicated in all of the following pleural fluid findings, EXCEPT:

Accepted Answer

pH > 7.4

Answer

Frank pus

Answer

Culture positive

Answer

None of the above

Question 3

Which of the following statements regarding sarcoidosis is incorrect?

Accepted Answer

An increased CD4/CD8 ratio in serum supports the diagnosis of sarcoidosis.

Answer

The lungs are the most commonly affected organ.

Answer

Lupus pernio is diagnostic of the chronic form of sarcoidosis.

Answer

Hypercalcemia occurs in 10% of sarcoidosis patients.

Question 4

A 29-year-old woman presents with a history of recurrent respiratory tract infections. She has no significant travel history and denies any history of foreign body aspiration. On examination, coarse crackles are noted in the left lower lung zone. A chest X-ray reveals findings suggestive of a possible abnormality. Based on the history and chest X-ray findings, what is the most appropriate next diagnostic step?

Accepted Answer

Contrast CT scan of the chest and upper abdomen

Answer

Bronchogram

Answer

Bronchoscopy

Answer

Determination of serum immunoglobulin levels

Question 5

A 61-year-old male presents with increasing shortness of breath. A chest x-ray reveals a diffuse pulmonary infiltrate, and a transbronchial biopsy reveals fibrosis of the walls of the alveoli, many of which contain sheets of desquamated cells. Which of the following would be the best therapy for this patient?

Accepted Answer

Steroids

Answer

Theophylline

Answer

Antibiotics

Answer

Isoniazid

Question 6

Which of the following is NOT a feature of allergic bronchopulmonary aspergillosis (ABPA)?

Accepted Answer

Raised IgA levels

Answer

Bronchial asthma

Answer

Central bronchiectasis

Answer

Peripheral eosinophilia

Question 7

Which of the following is not a feature of bronchiectasis?

Accepted Answer

Non-tuberculous mycobacteria involve the lower lobes

Answer

Tree in bud appearance

Answer

Upper lung fields are commonly involved in cystic fibrosis

Answer

Oral glucocorticoids are given for central bronchiectasis of ABPA

Question 8

Pneumothorax is not a usual occurrence with which of the following conditions?

Accepted Answer

Bronchopulmonary aspergillosis

Answer

Asthma

Answer

Marfan's syndrome

Answer

Positive pressure ventilation

Question 9

A 25-year-old patient presents with an incidental finding of a 2-cm solitary pulmonary nodule in the left lower lobe on a chest X-ray. The patient is asymptomatic and has no significant past medical history. Physical examination is normal. The nodule exhibits a "popcorn ball"-type calcification pattern. What is the most appropriate next step in management?

Accepted Answer

Serial chest X-rays

Answer

Left lower lobe resection

Answer

Needle aspiration biopsy

Answer

Left pneumonectomy

Question 10

A silent chest is a clinical finding characterized by diminished or absent breath sounds. In which of the following conditions is a silent chest most likely to be observed?

Accepted Answer

Very severe asthma

Answer

Chronic bronchitis

Answer

Emphysema

Answer

Bronchiectasis

Pulmonology — MCQs

Pulmonology — MCQs

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