Pulmonology Practice Questions

Q: Kartagener's syndrome includes which of the following EXCEPT?

Bronchitis. **Explanation:** Kartagener’s syndrome is a specific subset of **Primary Ciliary Dyskinesia (PCD)**, an autosomal recessive disorder characterized by structural defects in the dynein arms of cilia [2]. This leads to impaired mucociliary clearance throughout the body [2]. **Why Bronchitis is the correct answer (The Exception):** While patients with Kartagener’s syndrome suffer from recurrent respiratory infections, **Bronchitis** is not considered a defining component of the classic clinical triad. Bronchitis refers to acute or chronic inflammation of the bronchial tubes, whereas Kartagener’s involves permanent, irreversible structural damage known as **Bronchiectasis** [1, 3]. In the context of NEET-PG, "Bronchiectasis" is the specific pathological hallmark, making "Bronchitis" the incorrect descriptor for the syndrome. **Analysis of other options:** * **Situs Inversus (A):** Present in 50% of PCD patients (defining Kartagener’s). It occurs due to the failure of nodal cilia to determine left-right asymmetry during embryonic development. * **Sinusitis (C):** Chronic rhinosinusitis occurs because impaired cilia cannot clear mucus from the paranasal sinuses, leading to secondary bacterial infections [2]. * **Bronchiectasis (D):** Persistent stasis of secretions and recurrent infections lead to permanent dilation of the bronchi, a core feature of the syndrome [3, 4]. **High-Yield Clinical Pearls for NEET-PG:** 1. **The Classic Triad:** Situs inversus, Chronic sinusitis, and Bronchiectasis. 2. **Infertility:** Common in males (immotile spermatozoa) and females (impaired ciliary action in fallopian tubes). 3. **Diagnostic Gold Standard:** Electron microscopy showing **absence of dynein arms** (inner or outer). 4. **Screening Test:** Nasal Nitric Oxide (nNO) levels are characteristically very low in these patients.

Q: A patient tested positive for MTB on sputum CBNAAT and did not return for follow-up despite reminders. The patient now presents with massive hemoptysis. What is the next best step for this patient?

Perform multi-slice CT scan of the chest. The patient has a history of pulmonary tuberculosis (MTB) and presents with **massive hemoptysis** (typically defined as >200–600 mL of blood in 24 hours). In the context of TB, massive hemoptysis is most commonly caused by the rupture of a **Rasmussen’s aneurysm** (a pulmonary artery aneurysm within a tuberculous cavity) or hypertrophied bronchial arteries. [1] **Why Option B is correct:** Multi-slice CT (MSCT) angiography has replaced conventional angiography as the initial diagnostic tool of choice. It is non-invasive, rapid, and highly sensitive in identifying the **site and cause of bleeding** (e.g., cavity, aneurysm, or bronchiectasis). It serves as a "roadmap" for the interventional radiologist if Bronchial Artery Embolization (BAE)—the definitive non-surgical treatment—is required. [2] **Why other options are incorrect:** * **Option A:** While coagulation profiles are part of the workup, they are supportive and do not identify the source of life-threatening bleeding. * **Option C:** Flexible bronchoscopy has a limited role in massive hemoptysis because the large volume of blood obscures the field of vision, making it difficult to localize the bleed. * **Option D:** Rigid bronchoscopy is an excellent tool for airway stabilization and suctioning, but it is technically demanding and usually reserved for cases where MSCT is unavailable or the patient is too unstable to leave the ICU. **Clinical Pearls for NEET-PG:** 1. **Most common source of massive hemoptysis:** Bronchial arteries (90%), despite the lungs having a dual blood supply. 2. **Rasmussen’s Aneurysm:** A classic TB-associated cause involving the pulmonary artery. 3. **Immediate Management:** Position the patient with the **bleeding lung in the dependent (downward) position** to prevent aspiration into the healthy lung. 4. **Gold Standard Treatment:** Bronchial Artery Embolization (BAE). [2]

Q: Hamman's sign is most characteristic of which condition?

Pneumomediastinum. **Explanation:** **Hamman’s Sign** (also known as Hamman’s crunch) is a pathognomonic physical finding for **Pneumomediastinum**. It is characterized by a series of precordial crackles, clicks, or gurgling sounds synchronous with the heartbeat rather than respiration. **Why Pneumomediastinum is correct:** When air is trapped within the mediastinum, the mechanical contraction and relaxation of the heart against these air pockets create a "crunching" sound. This is best heard over the left sternal border with the patient in the left lateral decubitus position. It is often associated with Mackler’s triad (seen in Boerhaave syndrome). **Why other options are incorrect:** * **Subcutaneous emphysema:** While often co-existing with pneumomediastinum, it presents with "crepitus" (a rice-krispy popping sensation) upon palpation of the skin, not a rhythmic crunching sound synchronous with the heart. * **Pneumothorax:** This typically presents with decreased breath sounds and hyper-resonance on percussion. While a "clicking" sound can rarely occur in a left-sided spontaneous pneumothorax, it is not the classic Hamman’s sign. * **Pneumopericardium:** This involves air within the pericardial sac. It classically produces a "mill-wheel murmur" (bruit de moulin), which is a loud, splashing sound, distinct from the crunching of Hamman’s sign. **Clinical Pearls for NEET-PG:** * **Hamman’s Syndrome:** Refers to spontaneous pneumomediastinum, often triggered by activities involving the Valsalva maneuver (e.g., childbirth, weightlifting, or forceful coughing). * **Chest X-ray:** Look for the "continuous diaphragm sign" or "spinnaker sail sign" (in pediatrics) to diagnose pneumomediastinum. * **Differential:** Always rule out esophageal rupture (Boerhaave syndrome) when Hamman’s sign is present in a patient with chest pain and vomiting.

Q: Which of the following is the LEAST likely cause of hemoptysis?

Empyema. Hemoptysis is the expectoration of blood originating from the lower respiratory tract, typically due to the erosion of bronchial or pulmonary vessels. **Why Empyema is the Correct Answer:** Empyema is a collection of **pus** within the pleural space (the cavity between the lung and the chest wall) [1]. Because the infection is localized outside the lung parenchyma and the bronchial tree, there is no direct communication with the airways. Therefore, while empyema causes chest pain and fever, it does not typically cause hemoptysis unless it is complicated by a bronchopleural fistula [1]. **Analysis of Incorrect Options:** * **Pneumonia:** Inflammation and necrosis of the lung parenchyma can cause localized vascular damage [2]. "Rusty sputum" is a classic finding in *Streptococcus pneumoniae* [2]. * **Bronchiectasis:** This is one of the most common causes of massive hemoptysis [2]. Chronic inflammation leads to the hypertrophy and tortuosity of high-pressure **bronchial arteries**, which can easily rupture [2]. * **Mitral Stenosis:** This is a classic cardiovascular cause of hemoptysis. Elevated left atrial pressure leads to pulmonary venous hypertension, causing the rupture of small bronchial submucosal veins (often termed "cardiac asthma" or "pink frothy sputum" in acute failure). **Clinical Pearls for NEET-PG:** * **Most common cause of hemoptysis (Global/India):** Tuberculosis. * **Most common cause of hemoptysis (Western world):** Bronchitis / Bronchogenic carcinoma. * **Massive Hemoptysis:** Defined as >200–600 mL of blood in 24 hours. The **bronchial arteries** (systemic circulation) are responsible for 90% of massive hemoptysis cases, not the pulmonary arteries [2]. * **Initial Investigation of choice:** Chest X-ray. * **Gold standard for localizing the site of bleeding:** Bronchoscopy.

Q: Bilateral rhonchi may be seen in all of the following conditions except?

Pulmonary embolism. **Explanation:** The presence of **bilateral rhonchi** (polyphonic wheezing) indicates widespread narrowing of the small airways, typically due to bronchospasm, mucosal edema, or excessive secretions. **Why Pulmonary Embolism (PE) is the correct answer:** Pulmonary embolism is primarily a **vascular pathology**, not an airway disease. It involves the occlusion of pulmonary arteries by a thrombus. While massive PE can occasionally cause localized wheezing due to the release of bronchoconstrictive mediators (like serotonin), it typically presents with sudden onset dyspnea, pleuritic chest pain, and clear lung fields on auscultation [1]. It does **not** characteristically cause bilateral rhonchi. **Analysis of Incorrect Options:** * **Pulmonary Edema:** Known as "Cardiac Asthma," left-sided heart failure leads to peribronchial edema and fluid in the airways, resulting in bilateral rhonchi and crepitations [2]. * **Bronchiectasis:** This involves permanent dilatation of bronchi with chronic inflammation and copious secretions. The presence of thick mucus in the dilated airways frequently produces bilateral rhonchi and coarse crackles. * **Emphysema:** As a component of COPD, emphysema involves airway inflammation and loss of elastic recoil, leading to expiratory airflow obstruction and characteristic bilateral polyphonic rhonchi [2]. **High-Yield Clinical Pearls for NEET-PG:** * **Monophonic Rhonchi:** Suggests a fixed local obstruction (e.g., Foreign body or Bronchogenic Carcinoma). * **Polyphonic Rhonchi:** Suggests generalized airway disease (e.g., Asthma, COPD) [2]. * **Silent Chest:** A dangerous sign in acute severe asthma where airflow is too low to even produce a rhonchus. * **Classic PE Triad:** Dyspnea, Chest Pain, and Hemoptysis (seen in <20% of cases). The most common ECG finding is Sinus Tachycardia; the most specific is S1Q3T3 [1].

Q: ARDS is characterized by all except:

Alveolar transudate. **Explanation:** Acute Respiratory Distress Syndrome (ARDS) is characterized by **non-cardiogenic pulmonary edema** resulting from diffuse alveolar-capillary damage. **Why "Alveolar Transudate" is the correct answer:** In ARDS, the primary pathology is increased permeability of the alveolar-capillary membrane due to inflammatory injury. This leads to the leakage of protein-rich fluid into the alveolar space, known as an **exudate**. In contrast, a *transudate* occurs due to hydrostatic pressure changes (e.g., Congestive Heart Failure), which ARDS specifically excludes by definition. **Analysis of Incorrect Options:** * **Decreased Surfactant:** Damage to Type II pneumocytes and the presence of proteinaceous fluid lead to the inactivation and decreased production of surfactant. This increases surface tension, causing alveolar collapse. * **Decreased Lung Compliance:** The combination of alveolar edema, loss of surfactant, and subsequent fibrosis makes the lungs "stiff." This reduction in compliance increases the work of breathing. * **PaO2/FiO2 < 200:** According to the **Berlin Criteria**, ARDS is categorized by the severity of hypoxemia (Mild: 200–300; Moderate: 100–200; Severe: <100). Thus, a ratio <200 is a classic feature of moderate-to-severe ARDS. **High-Yield Clinical Pearls for NEET-PG:** * **Berlin Criteria:** Acute onset (<1 week), bilateral opacities on imaging not fully explained by effusions/collapse, and respiratory failure not fully explained by heart failure (PCWP <18 mmHg). * **Pathological Hallmark:** Diffuse Alveolar Damage (DAD) and **Hyaline membrane** formation. * **Management:** Low tidal volume ventilation (6 mL/kg) is the gold standard to prevent Volutrauma.

Question 1

Kartagener's syndrome includes which of the following EXCEPT?

Accepted Answer

Bronchitis

Answer

Situs inversus

Answer

Sinusitis

Answer

Bronchiectasis

Question 2

Which of the following is a feature of acute severe asthma?

Accepted Answer

Peak expiratory flow rate of < 40%

Answer

Heart rate of 110 beats/min

Answer

PaO2 of 70 mmHg

Answer

All of the above

Question 3

Which of the following conditions can produce hemothorax?

Accepted Answer

Uremia

Answer

Myxoma

Answer

Congestive heart failure

Answer

Rheumatoid arthritis

Question 4

A patient tested positive for MTB on sputum CBNAAT and did not return for follow-up despite reminders. The patient now presents with massive hemoptysis. What is the next best step for this patient?

Accepted Answer

Perform multi-slice CT scan of the chest

Answer

Urgent coagulation studies

Answer

Schedule a flexible fiber-optic bronchoscopy

Answer

Urgent rigid bronchoscopy with prophylactic balloon tamponade

Question 5

A 65-year-old patient with chronic obstructive airway disease presented with headache, rhinorrhoea, myalgia, and retro-orbital and throat pain. He was managed conservatively. After 3-4 days, he presented again with cough, fever, and severe dyspnoea, requiring oxygen therapy. His condition deteriorated further, and ABG analysis showed pH 7.42, pCO2 41 mm Hg, pO2 34 mm Hg, and HCO3- 26 mmol/L. Blood cultures and sputum samples were negative for bacterial infections. Which of the following statements about the causative organism of this condition is FALSE?

Accepted Answer

Haemolysins are present.

Answer

The organism is mostly spherical but filamentous in fresh isolates.

Answer

The organism is segmented with 8 pieces of RNA.

Answer

The diameter of the nucleocapsid is 9nm.

Question 6

Hamman's sign is most characteristic of which condition?

Accepted Answer

Pneumomediastinum

Answer

Subcutaneous emphysema

Answer

Pneumothorax

Answer

Pneumopericardium

Question 7

Which of the following is the LEAST likely cause of hemoptysis?

Accepted Answer

Empyema

Answer

Pneumonia

Answer

Bronchiectasis

Answer

Mitral stenosis

Question 8

Bilateral rhonchi may be seen in all of the following conditions except?

Accepted Answer

Pulmonary embolism

Answer

Pulmonary edema

Answer

Bronchiectasis

Answer

Emphysema

Question 9

What is true about sarcoidosis?

Accepted Answer

Kveim test is helpful in diagnosis

Answer

May be associated with positive RA factor

Answer

Associated with pleural effusion

Answer

Common in 50-year-old males

Question 10

ARDS is characterized by all except:

Accepted Answer

Alveolar transudate

Answer

Decreased surfactant

Answer

Decreased lung compliance

Answer

PaO2/FiO2 < 200

Pulmonology — MCQs

Pulmonology — MCQs

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