Pulmonology Practice Questions

Q: Lymphangioleiomyomatosis is characterized by all of the following features except:

Postmenopausal women. Explanation: Lymphangioleiomyomatosis (LAM) is a rare, progressive cystic lung disease characterized by the proliferation of atypical smooth muscle-like cells (LAM cells). **1. Why "Postmenopausal women" is the correct answer:** LAM almost exclusively affects **women of childbearing age** (premenopausal). The disease is highly estrogen-dependent; it typically worsens during pregnancy or with exogenous estrogen use and tends to stabilize or slow down after menopause. Therefore, its presentation in postmenopausal women is rare and not a characteristic feature. **2. Analysis of other options:** * **Recurrent chylous pleural effusions:** LAM cells can obstruct thoracic lymphatics or the thoracic duct, leading to the leakage of chyle into the pleural space. * **Ascites:** Similarly, lymphatic obstruction in the abdomen or involvement of the retroperitoneal lymphatics can result in chylous ascites. * **Recurrent spontaneous pneumothorax:** This is a hallmark of LAM. The formation of thin-walled lung cysts leads to frequent ruptures, with a recurrence rate of over 70%. **Clinical Pearls for NEET-PG:** * **Genetics:** Associated with mutations in **TSC1 or TSC2** genes (Tuberous Sclerosis Complex). * **Imaging:** HRCT shows diffuse, thin-walled, **bilateral circular cysts** (unlike Langerhans Cell Histiocytosis, which has irregular cysts and nodules). * **Extrapulmonary finding:** **Renal Angiomyolipomas** (AMLs) are found in about 50% of sporadic LAM cases. * **Biomarker:** Elevated serum **VEGF-D** levels are highly specific for diagnosis. * **Treatment:** **Sirolimus** (mTOR inhibitor) is the drug of choice to stabilize lung function.

Q: A 30-year-old male presents with recurrent hemoptysis. X-ray shows no abnormality. What is the next investigation?

Bronchoscopy. **Explanation:** The clinical presentation of recurrent hemoptysis in a young patient with a **normal chest X-ray (CXR)** is a classic diagnostic challenge. In approximately 20–30% of patients with hemoptysis, the CXR remains unremarkable. **Why Bronchoscopy is the correct answer:** Bronchoscopy (specifically Flexible Fiberoptic Bronchoscopy) is the investigation of choice when the CXR is normal because it allows for the direct visualization of the tracheobronchial tree [2]. It is superior for detecting **endobronchial pathologies** that are often invisible on imaging, such as: * Early-stage bronchogenic carcinoma (especially squamous cell) [1] * Bronchial adenomas (Carcinoid tumors) [2] * Foreign bodies * Dieulafoy’s lesion of the bronchus **Why other options are incorrect:** * **HRCT (High-Resolution CT):** While excellent for diagnosing bronchiectasis or interstitial lung disease, it is less sensitive than bronchoscopy for identifying subtle mucosal lesions or small endobronchial tumors in a patient with a normal CXR [3]. * **Spiral/Helical CT:** These are essentially the same technology. While CT Angiography (MDCT) is the gold standard for identifying the *source* of bleeding (e.g., bronchial artery hypertrophy), bronchoscopy remains the primary tool for *localization* and *biopsy* when the initial X-ray is negative. **Clinical Pearls for NEET-PG:** * **Most common cause of hemoptysis (Global/India):** Tuberculosis. * **Most common cause of hemoptysis (Western world):** Bronchitis. * **Massive Hemoptysis:** Defined as >200–600 mL of blood in 24 hours. The immediate priority is airway protection (positioning the patient with the bleeding side down). * **Gold Standard for identifying the bleeding vessel:** Multi-Detector Computed Tomography (MDCT). * **Definitive management for refractory massive hemoptysis:** Bronchial Artery Embolization (BAE).

Q: A 30-year-old African-American woman presents with bilateral hilar lymphadenopathy and reticular densities in both lung fields. Which of the following is a defining characteristic of the disorder suggested by these findings?

Noncaseating granulomas. **Explanation:** The clinical presentation of a young African-American woman with bilateral hilar lymphadenopathy and reticular opacities is classic for **Sarcoidosis** [1]. This is a multisystem, idiopathic inflammatory disease characterized by the formation of **noncaseating granulomas**. **1. Why Option A is Correct:** The hallmark of Sarcoidosis is the presence of well-formed, non-necrotizing (noncaseating) granulomas [1]. These consist of an organized collection of epithelioid histiocytes, multinucleated giant cells (often containing **Schaumann bodies** or **Asteroid bodies**), and a rim of lymphocytes. Unlike tuberculosis, there is no central necrosis [2]. **2. Why Incorrect Options are Wrong:** * **B. Hypocalcemia:** Sarcoidosis actually causes **Hypercalcemia** [1]. Macrophages within the granulomas contain 1-alpha-hydroxylase, which converts Vitamin D to its active form (1,25-dihydroxyvitamin D), leading to increased intestinal calcium absorption. * **C. Impaired synthesis of immunoglobulin:** Sarcoidosis is typically associated with **Hypergammaglobulinemia** (polyclonal) due to an exaggerated B-cell response, though T-cell mediated delayed-type hypersensitivity is often suppressed (anergy). * **D. Caseation and necrosis:** These are defining features of **Tuberculosis** or certain fungal infections [2]. Sarcoidosis granulomas are strictly non-caseating. **Clinical Pearls for NEET-PG:** * **Staging:** Stage I (Hilar adenopathy only), Stage II (Adenopathy + Infiltrates), Stage III (Infiltrates only), Stage IV (Fibrosis). * **Lofgren Syndrome:** Triad of Erythema nodosum, bilateral hilar lymphadenopathy, and polyarthritis (Good prognosis) [1]. * **Heerfordt Syndrome:** Uveitis, parotitis, and facial nerve palsy [1]. * **Lab Markers:** Elevated Serum ACE levels and hypercalciuria.

Q: Pseudochylous pleural effusion is characteristically seen in which of the following conditions?

Tuberculosis. **Explanation:** **Pseudochylous pleural effusion** (also known as cholesterol effusion) is characterized by the accumulation of cholesterol crystals in the pleural space. It typically occurs in **long-standing, chronic pleural effusions** where the pleura has become thickened and calcified [1]. 1. **Why Tuberculosis is Correct:** Chronic **Tuberculous pleurisy** is the most common cause of pseudochylous effusion [1]. The underlying mechanism involves the breakdown of red blood cells and neutrophils within a long-standing, trapped effusion. The thickened, fibrotic pleura prevents the absorption of these lipids, leading to a high concentration of cholesterol (usually >200 mg/dL) while triglyceride levels remain low. 2. **Why Other Options are Incorrect:** * **Lymphoma, Carcinoma of the lung, and Filariasis:** These conditions are classic causes of **Chylous effusion** (True Chyle) [1]. Chylous effusions result from the disruption or obstruction of the thoracic duct, leading to the leakage of lymph containing high levels of **triglycerides** (>110 mg/dL) and chylomicrons. **High-Yield Clinical Pearls for NEET-PG:** * **Appearance:** Both chylous and pseudochylous effusions appear milky/opalescent [1]. * **Key Diagnostic Difference:** * **Chylous:** High Triglycerides (>110 mg/dL), presence of Chylomicrons. * **Pseudochylous:** High Cholesterol (>200 mg/dL), presence of rhomboid-shaped cholesterol crystals on microscopy. * **Common Causes of Pseudochylous Effusion:** Chronic Tuberculosis and Rheumatoid Arthritis (RA). * **Common Causes of Chylous Effusion:** Trauma (most common), Malignancy (Lymphoma), and Filariasis.

Q: Which of the following is a clinical feature of pneumonia?

Increased breath sounds. **Explanation:** The clinical hallmark of pneumonia is **consolidation**, which occurs when the alveoli are filled with inflammatory exudate (fluid, pus, and cells) instead of air. **Why "Increased breath sounds" is correct:** In a normal lung, air-filled alveoli act as a filter that attenuates high-pitched sounds from the large airways. In pneumonia, the consolidated (solidified) lung tissue conducts sound more efficiently than air. This leads to **bronchial breath sounds**, which are characterized by a loud, high-pitched quality with a distinct pause between inspiration and expiration. **Analysis of Incorrect Options:** * **A. Tracheal shift:** This occurs when there is a significant pressure imbalance in the hemithorax. It is seen in large pleural effusions or tension pneumothorax (shift away) or significant collapse/atelectasis (shift toward). Pneumonia typically does not cause a tracheal shift. * **C. Decreased vocal fremitus:** In consolidation, sound vibrations from the larynx are conducted better through the solid medium. Therefore, pneumonia presents with **increased** tactile vocal fremitus. Decreased fremitus is seen in pleural effusion, pneumothorax, or COPD. * **D. Absence of egophony:** Egophony (the "E to A" change) is a classic sign of consolidation. Its **presence**, not absence, is a clinical feature of pneumonia. **NEET-PG High-Yield Pearls:** * **The "Consolidation Triad":** Increased tactile vocal fremitus, Dullness on percussion, and Bronchial breath sounds/Crackles. * **Vocal Resonance:** Look for *Bronchophony* (whispered words are louder) and *Whispered Pectoriloquy*. * **Differentiating Feature:** Both Pleural Effusion and Pneumonia show dullness on percussion, but **Fremitus** is the key differentiator (Increased in pneumonia; Decreased in effusion).

Q: A patient with a known case of COPD presents with an acute exacerbation and is managed in the ICU. Which of the following statements is NOT true regarding its management?

Non-invasive ventilation is not indicated.. In the management of acute exacerbation of COPD (AECOPD), **Non-invasive Ventilation (NIV)** is considered the **gold standard** of care for patients with respiratory failure (specifically Type 2 respiratory failure with respiratory acidosis, pH <7.35). Therefore, the statement that NIV is "not indicated" is incorrect. NIV reduces the need for endotracheal intubation, decreases the length of hospital stay, and significantly reduces mortality. **Analysis of Options:** * **Option A (Correct Answer):** NIV is actually the first-line intervention in the ICU for AECOPD. It helps by providing positive end-expiratory pressure (PEEP) to counteract intrinsic PEEP, thereby reducing the work of breathing. * **Option B:** Oxygen inhalation is essential, but it must be titrated carefully (target SpO2: 88–92%) to avoid worsening hypercapnia due to the loss of hypoxic respiratory drive [3]. * **Option C:** Short-acting beta-agonists (SABA) like Salbutamol are the first-line bronchodilators used to relieve acute bronchospasm [2]. * **Option D:** Systemic corticosteroids (IV Dexamethasone or Methylprednisolone, or Oral Prednisolone) are standard care to reduce airway inflammation, improve lung function (FEV1), and shorten recovery time [1]. **Clinical Pearls for NEET-PG:** * **Indications for NIV in AECOPD:** Respiratory acidosis (pH ≤ 7.35 and/or PaCO2 > 45 mmHg) or severe dyspnea with clinical signs of muscle fatigue [4]. * **Antibiotics:** Indicated if there is increased sputum purulence, increased sputum volume, and increased dyspnea (Anthonisen Criteria). * **Most common trigger for AECOPD:** Viral or bacterial infections (e.g., *H. influenzae*, *S. pneumoniae*).

Q: Kartagener syndrome is characterized by which of the following?

All of the above. **Explanation:** **Kartagener Syndrome** is a specific subset of **Primary Ciliary Dyskinesia (PCD)**, an autosomal recessive disorder characterized by structural or functional defects in the cilia (most commonly a mutation in the **dynein arms**). The syndrome is classically defined by a **clinical triad**: 1. **Situs Inversus:** Due to the failure of ciliary movement during embryonic development, which is necessary for the normal left-right orientation of internal organs. 2. **Bronchiectasis:** Chronic impairment of the mucociliary escalator leads to recurrent lower respiratory tract infections, resulting in permanent dilation of the bronchi [1]. 3. **Sinusitis:** Impaired ciliary clearance in the paranasal sinuses leads to chronic inflammation and infection [1]. **Why "All of the above" is correct:** Since Kartagener Syndrome is defined by the presence of all three components—bronchiectasis, situs inversus, and sinusitis—options A, B, and C are all integral features of the condition. **Clinical Pearls for NEET-PG:** * **Infertility:** A high-yield association. Males are infertile due to **immotile spermatozoa** (tail of sperm is a modified cilium), while females may have reduced fertility due to impaired ciliary action in the **fallopian tubes**. * **Diagnosis:** The screening test of choice is **nasal Nitric Oxide (nNO)** levels (which are low). The definitive diagnosis is made via **electron microscopy** of ciliary biopsy (showing absent dynein arms) or genetic testing. * **Dextrocardia:** While situs inversus involves total organ reversal, dextrocardia (heart on the right side) is the most commonly recognized feature on a chest X-ray in these patients.

Question 1

Lymphangioleiomyomatosis is characterized by all of the following features except:

Accepted Answer

Postmenopausal women

Answer

Recurrent chylous pleural effusions

Answer

Ascites

Answer

Recurrent spontaneous pneumothorax

Question 2

A 30-year-old male presents with recurrent hemoptysis. X-ray shows no abnormality. What is the next investigation?

Accepted Answer

Bronchoscopy

Answer

HRCT

Answer

Spiral CT

Answer

Helical CT

Question 3

A 30-year-old African-American woman presents with bilateral hilar lymphadenopathy and reticular densities in both lung fields. Which of the following is a defining characteristic of the disorder suggested by these findings?

Accepted Answer

Noncaseating granulomas

Answer

Hypocalcemia

Answer

Impaired synthesis of immunoglobulin

Answer

Caseation and necrosis may occur

Question 4

Pseudochylous pleural effusion is characteristically seen in which of the following conditions?

Accepted Answer

Tuberculosis

Answer

Lymphoma

Answer

Carcinoma of the lung

Answer

Filariasis

Question 5

Which of the following is a clinical feature of pneumonia?

Accepted Answer

Increased breath sounds

Answer

Tracheal shift

Answer

Decreased vocal fremitus

Answer

Absence of egophony

Question 6

A 25-year-old male with a long history of severe asthma presents to the emergency room with shortness of breath. He has previously required hospital admission and was once intubated for asthma. Which of the following findings on physical exam would indicate a benign course?

Accepted Answer

Pulsus paradoxus of 5 mmHg

Answer

Silent chest

Answer

Hypercapnia

Answer

Thoracoabdominal paradox

Question 7

A patient with a known case of COPD presents with an acute exacerbation and is managed in the ICU. Which of the following statements is NOT true regarding its management?

Accepted Answer

Non-invasive ventilation is not indicated.

Answer

Oxygen inhalation.

Answer

Salbutamol inhalation.

Answer

Intravenous dexamethasone.

Question 8

A 53-year-old male smoker with progressive shortness of breath, who has received multiple courses of antibiotics for presumed bronchitis, presents with diffuse rhonchi and crackles on lung examination. Arterial blood gases show a PaO2 of 68 mm Hg with mild compensated respiratory alkalosis. Sputum for AFB is negative. Associated with this diagnosis is:

Accepted Answer

Clubbing

Answer

Increased IgE

Answer

Hypocalcemia

Answer

Eosinophilia

Question 9

A 32-year-old nonsmoking female presents with a 5-week history of intermittent hemoptysis. She denies sputum production, fever, or recurrent infections. There is no history of TB contact. Physical examination reveals the patient is afebrile, with dullness on percussion and decreased breath sounds in the left lower lobe posteriorly. Cardiovascular examination is normal. PPD shows 4-mm induration. Bronchoscopy reveals a polypoid lesion partially obstructing the left lower lobe orifice, which bled easily during the procedure. Bronchial washings are negative for malignancy, and the biopsy is pending. What is the radiological diagnosis based on the described findings?

Accepted Answer

Left lower lobe atelectasis

Answer

Left lower lobe pneumonia

Answer

Pneumothorax

Answer

Pleural effusion

Question 10

Kartagener syndrome is characterized by which of the following?

Accepted Answer

All of the above

Answer

Bronchiectasis

Answer

Situs inversus

Answer

Sinusitis

Pulmonology — MCQs

Pulmonology — MCQs

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