Pulmonology Practice Questions

Q: Hemoptysis is said to be massive when it exceeds what amount in 24 hours?

600mL. 600mL - Hemoptysis is considered **massive** when the volume of blood expectorated exceeds **600 mL within a 24-hour period**, or **100 mL per hour**, indicating a life-threatening emergency. - This threshold is crucial because it significantly increases the risk of **airway obstruction** and **hypovolemic shock**, which requires immediate medical intervention. *400mL* - While 400 mL in 24 hours is a significant amount of bleeding, it is generally not classified as **massive hemoptysis** according to most clinical definitions. - Significant hemoptysis can still be dangerous and require investigation, but it does not meet the criteria for immediately life-threatening massive hemoptysis. *500mL* - This volume is close to the threshold for massive hemoptysis but is still typically not the **definitive cutoff** used in clinical practice. - It would still warrant aggressive management and consideration for interventions like bronchoscopy or embolization. *800mL* - While certainly a severe amount, 800 mL in 24 hours **exceeds** the generally accepted definition of massive hemoptysis. - The 600 mL threshold is based on the point at which there is a critical risk of **asphyxiation** or **hemodynamic instability** [1].

Q: Which of the following is the least likely cause of bronchiectasis?

Primary TB. Primary TB - While post-primary (reactivation) tuberculosis can lead to **bronchiectasis**, primary tuberculosis is less commonly a direct cause of established, widespread bronchiectasis in the acute phase. - Primary TB more often causes **lymphadenopathy** and localized parenchymal disease, with bronchiectasis being a rarer, late complication if airway obstruction or severe destruction occurs. *Pneumonia* - Severe or recurrent bacterial pneumonias can cause **irreversible damage** to the bronchial walls, leading to dilation and fibrosis, which is characteristic of bronchiectasis [1]. - The inflammatory process and **mucociliary dysfunction** during pneumonia contribute to ongoing infection and structural changes [1]. *Inhaled foreign body* - A persistent **foreign body** in the airway can cause localized obstruction, leading to chronic inflammation, infection, and subsequent dilation of the bronchi distal to the obstruction [1]. - This recurrent infection and inflammation weaken the bronchial walls over time, defining localized bronchiectasis. *Chronic aspiration* - **Recurrent aspiration** of gastric contents or oral secretions causes repeated injury and inflammation to the bronchial epithelium. - This chronic irritation and potential for bacterial colonization damage the airway walls, predisposing to **bronchial dilation** and infection, characteristic of bronchiectasis.

Q: Most common clinical presentation of sarcoidosis is?

Hilar lymphadenopathy. ***Hilar lymphadenopathy*** - The most common clinical presentation of **sarcoidosis** is **hilar lymphadenopathy**, often discovered incidentally on chest X-ray [1]. - It is associated with **granulomatous inflammation** within the lymph nodes, which is a hallmark of sarcoidosis [1]. *Pleural plaque* - Typically associated with **asbestosis**, not sarcoidosis; involves localized fibrous thickening of the pleura. - Rarely presents as a predominant feature in sarcoidosis cases. *Interstitial calcification* - While calcification can occur in sarcoidosis, it is not a primary or common presentation; it pertains more to chronic cases. - It may result from granulomatosis, but the initial clinical manifestation is usually hilar lymphadenopathy. *Pulmonary fibrosis* - Pulmonary fibrosis can develop in advanced sarcoidosis but is not the most common initial presentation. - The early stage is characterized more by **inflammation and lymphadenopathy**, rather than fibrosis.

Q: A 45-year-old man presents with a dry cough, fatigue, and bilateral hilar lymphadenopathy on chest X-ray. What is the most likely diagnosis?

Sarcoidosis. ***Silicosis*** - The patient's **occupation in a mine** suggests exposure to **silica dust**, leading to lung diseases including silicosis [1]. - **Bilateral hilar lymphadenopathy** and dry cough are common findings, aligning well with the symptoms presented. *Tuberculosis* - Typically presents with **cough**, but more often with **hemoptysis** and systemic symptoms like **weight loss** and **night sweats**. - **Hilar lymphadenopathy** may be present, but not as clearly related to mining exposure as in silicosis. Notably, silicosis is associated with increased susceptibility to tuberculosis [1]. *Sarcoidosis* - Can cause **bilateral hilar lymphadenopathy** [2], but often presents with additional systemic symptoms and is less directly connected to occupational exposure to dust. - Frequently associated with **skin lesions** and **uveitis**, which are not mentioned in this case. *Asbestosis* - Primarily associated with **exposure to asbestos**, typically causing symptoms like **dyspnea** and **pulmonary fibrosis**, rather than hilar lymphadenopathy. - The occupational history does not support asbestosis, as mining exposure is more indicative of silicosis. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lung, pp. 697-698. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Lung, pp. 700-701.

Question 1

Hemoptysis is said to be massive when it exceeds what amount in 24 hours?

Accepted Answer

600mL

Answer

400mL

Answer

500mL

Answer

800mL

Question 2

Which of the following is the least likely cause of bronchiectasis?

Accepted Answer

Primary TB

Answer

Pneumonia

Answer

Inhaled foreign body

Answer

Chronic aspiration

Question 3

Patient with pulmonary parenchymal fibrosis (PPF) who complains of breathing difficulty, is tachycardic, and tachypneic, and has a Batwing sign present on X-ray. What is the possible reason?

Accepted Answer

Due to fluid overload in a patient with pulmonary parenchymal fibrosis

Answer

Transfusion-related lung injury

Answer

Acute renal failure due to tubular acidosis

Answer

Hemolysis leading to hemoglobinuria

Question 4

Most common clinical presentation of sarcoidosis is?

Accepted Answer

Hilar lymphadenopathy

Answer

Pleural plaque

Answer

Pulmonary fibrosis

Answer

Interstitial calcification

Question 5

A 45-year-old man presents with a dry cough, fatigue, and bilateral hilar lymphadenopathy on chest X-ray. What is the most likely diagnosis?

Accepted Answer

Sarcoidosis

Answer

Silicosis

Answer

Tuberculosis

Answer

Asbestosis

Pulmonology — MCQs

Pulmonology — MCQs

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