Chest Radiology Practice Questions

Q: A 4-year-old child with high grade fever with chills and rigors for past 4 days and fast breathing is brought to the hospital. On examination subcostal recession and nasal flaring is noted. Since patient is already on antibiotics for past 3 days from another hospital a Chest X-ray and CT Chest was ordered. The diagnosis is:

Massive right sided parapneumonic effusion. ***Massive right sided parapneumonic effusion*** - The chest x-ray shows complete opacification of the right hemithorax with a **mediastinal shift to the left**, indicating a large volume of fluid in the right pleural space. - The CT scan confirms a large, homogeneous fluid collection on the right side, compressing the lung and mediastinum, consistent with a **massive pleural effusion**, likely parapneumonic given the clinical context of fever and respiratory distress despite antibiotics. *Massive pan consolidation* - While consolidation would appear opaque on X-ray, **massive pan consolidation** of an entire lung would typically not cause such a significant **mediastinal shift** as fluid does. - The CT images show a distinct **fluid-density collection** rather than diffuse parenchymal opacification characteristic of consolidation. *Right sided hydro-pneumothorax* - A hydro-pneumothorax would present with a **fluid level** on the chest X-ray and CT scan, indicating both air and fluid in the pleural space. - The images show a **homogeneous fluid collection** without any discernible air component or fluid level, ruling out pneumothorax. *Right sided segmental collapse* - Segmental collapse would typically involve only a portion of the lung and would manifest as a **volume loss** in a specific segment, often with features like crowding of vessels and bronchi. - The findings depict an entire hemithorax filled with fluid causing **volume expansion** on the affected side rather than collapse.

Q: The chest X-ray of a cystic fibrosis patient shows presence of:

Bronchiectasis. ***Bronchiectasis*** - The X-ray shows diffuse, bilateral **peribronchial thickening** and **cystic lucencies**, particularly in the lower lobes, which are classic signs of bronchiectasis in a patient with cystic fibrosis. - **Bronchiectasis** is a common and progressive complication of cystic fibrosis due to recurrent infections and inflammation leading to permanent dilation and damage of the bronchi. *Left lower lobe pneumonia* - While pneumonia can occur in cystic fibrosis, the image demonstrates chronic changes rather than an acute consolidation typically seen with **left lower lobe pneumonia**. - **Pneumonia** would typically present with a more focal area of increased density, possibly with air bronchograms, which are not the predominant features here. *Bronchopneumonia* - **Bronchopneumonia** would show patchy areas of consolidation scattered throughout the lungs, often involving multiple lobes. - While there are opacities, the prominent **cystic changes** and **tram track lines** are more indicative of bronchiectasis than acute bronchopneumonia. *Right middle lobe collapse* - **Right middle lobe collapse** would manifest as a triangular opacity in the right mid-lung field, often associated with a shift of the right heart border and horizontal fissure. - This specific pattern of collapse is not observed; instead, there are generalized changes consistent with diffuse airway disease.

Q: An axial HRCT of the chest is shown. The image demonstrates small peripheral branching opacities due to mucoid impaction of contiguous branching bronchioles. What is the most likely diagnosis?

Endobronchial tuberculosis. ***Endobronchial tuberculosis*** - The HRCT shows **bronchiolar dilatation, wall thickening, and mucoid impaction** of contiguous branching bronchioles — the hallmarks of **endobronchial TB** - This produces the classic **"tree-in-bud" appearance**: small, branching peripheral opacities on CT resembling a budding tree - Endobronchial TB results from direct spread of mycobacteria to the bronchial mucosa, causing caseous necrosis, ulceration, and luminal narrowing *Allergic bronchopulmonary aspergillosis (ABPA)* - ABPA can also cause mucoid impaction but typically involves **central (proximal) bronchi** with **high-attenuation mucus plugs**; associated with asthma and eosinophilia - Does not classically produce the peripheral tree-in-bud pattern *Pulmonary alveolar proteinosis* - PAP characteristically shows the **"crazy paving" pattern** on CT — geographic ground-glass opacities with superimposed interlobular septal thickening - Tree-in-bud is not a feature of PAP *Sarcoidosis* - Sarcoidosis typically produces **perilymphatic nodules**, bilateral hilar lymphadenopathy, and may show the "galaxy sign" or beaded fissure sign - Tree-in-bud pattern is not characteristic of sarcoidosis

Q: The CT chest image shows large bullae in bilateral lung fields. This is diagnostic of which condition?

Emphysema. ***Emphysema*** - **Bullae** are characteristic findings in emphysema, representing abnormally enlarged airspaces within the lung parenchyma. - On CT scans, these appear as demarcated **lucencies (dark areas)**, often with thin walls, indicating destruction of alveolar walls and loss of elastic recoil. *Pneumonia* - Pneumonia typically presents with **consolidation** or **ground-glass opacities** on CT, indicating inflammation and fluid in the alveoli. - It does not typically cause the formation of large bullae; instead, it shows areas of increased density. *Bronchiectasis* - Bronchiectasis is characterized by irreversible **dilation of the bronchi**, often seen as "tram tracks" or "signet ring" signs on CT. - While it can involve air trapping, it does not primarily manifest as large bullae, but rather as thickened and dilated airways. *Interstitial fibrosis* - Interstitial fibrosis involves **thickening and scarring of the lung interstitium**, leading to a restrictive lung disease pattern. - CT findings would typically include **reticular opacities**, honeycombing, and traction bronchiectasis, not bullae.

Q: A chest X-ray shows bilateral reticular nodular shadows in both lung fields. The diaphragm is not flattened and the cardiothoracic ratio appears normal. What is the most likely pattern seen?

Reticular shadows. ***Reticular shadows*** - The CXR shows **bilateral reticular nodular shadows** without hyperinflation or cardiac enlargement - This pattern represents **thickened interstitial structures** forming a net-like (reticular) appearance - Characteristic of **interstitial lung diseases** such as idiopathic pulmonary fibrosis, interstitial pneumonitis, or collagen vascular disease - Normal cardiothoracic ratio and diaphragm position confirm this is an **interstitial pattern** *Incorrect: Emphysema* - Emphysema presents with **hyperinflation** and **flattening of the diaphragm** - Would show increased lucency, not reticular shadows - The normal diaphragm position rules out significant emphysema *Incorrect: Pulmonary edema* - Pulmonary edema typically shows **bat wing or perihilar distribution** - Associated with **increased cardiothoracic ratio** and **Kerley B lines** - The normal cardiac borders argue against cardiogenic pulmonary edema *Incorrect: Pericardial effusion* - Pericardial effusion presents with **enlarged cardiac silhouette** (water bottle heart) - **Increased cardiothoracic ratio** would be prominent - Does not produce reticular nodular lung field shadows - Normal cardiac borders on this CXR exclude significant pericardial effusion

Q: The image shows a standing upright chest X-ray with pleural reflection and a straight horizontal air-fluid level with absence of meniscus sign. What is the most likely diagnosis?

Hydropneumothorax. ***Correct: Hydropneumothorax*** - The image exhibits a **straight horizontal air-fluid level** in the pleural space, visible on an upright chest X-ray, which is characteristic of hydropneumothorax (simultaneous presence of both air and fluid in the pleural cavity). - The **absence of the meniscus sign (Ellis curve)** is the key distinguishing feature - this curved meniscus would be seen in a simple pleural effusion. - The **straight level** indicates air above fluid, confirming hydropneumothorax. *Incorrect: Pleural effusion* - Simple pleural effusion shows a **meniscus sign (Ellis curve)** - a curved upper border where fluid meets the chest wall. - No air-fluid level would be present, just homogeneous opacity with preserved meniscus. *Incorrect: Pneumothorax* - Pneumothorax shows **air only** in the pleural space with visible visceral pleural line. - No fluid level would be present - just absence of lung markings peripherally. *Incorrect: Empyema* - While empyema can occasionally show air-fluid level (if gas-forming organisms or bronchopleural fistula), it typically presents as a **loculated collection** with irregular borders and pleural thickening. - The classic straight air-fluid level is more characteristic of hydropneumothorax.

Q: The CT chest image shows a hazy increased attenuation with preserved bronchial and vascular markings. What pattern is demonstrated?

Ground glass pattern. ***Ground glass pattern*** - The image shows **hazy increase in lung attenuation** that does not obscure underlying bronchial and vascular margins - This is the defining feature of **ground glass opacity (GGO)** - Suggests partial filling of airspaces, interstitial thickening, partial alveolar collapse, or increased capillary blood volume - Commonly seen in **interstitial lung diseases**, atypical pneumonias, pulmonary edema, and diffuse alveolar hemorrhage *Honeycomb pattern* - Characterized by **clustered cystic airspaces** with thick walls (3-10mm) - Represents **end-stage pulmonary fibrosis** with irreversible architectural distortion - Typically seen in **peripheral and subpleural distribution** in usual interstitial pneumonia (UIP) - NOT present in this image, which shows preserved architecture *Crazy paving pattern* - Combination of **ground glass opacity with superimposed interlobular septal thickening** and intralobular lines - Creates a pattern resembling **irregular paving stones** - Classically associated with **pulmonary alveolar proteinosis** but also seen in Pneumocystis pneumonia, ARDS, and organizing pneumonia - NOT present in this image, which lacks the prominent septal thickening *Tree-in-bud pattern* - Represents **centrilobular nodules** with connecting branching linear structures - Indicates **bronchiolar impaction** with mucus, pus, or fluid - Commonly seen in **endobronchial spread of tuberculosis**, bacterial bronchopneumonia, and bronchiolitis - NOT present in this image, which shows diffuse hazy attenuation rather than nodular opacities

Q: A 45-year-old male presents with sudden onset shortness of breath and chest pain. A chest X-ray is obtained. What is the most likely diagnosis based on the image?

Pneumothorax. ***Pneumothorax*** - The chest X-ray shows several classic signs of a pneumothorax: **absent vascular markings** in the right lung field (indicated by red markings), a **deep sulcus sign** (blue arrow), and a visible **visceral pleural line** (yellow line) separating the collapsed lung from the chest wall. - The sudden onset of **shortness of breath** and **chest pain** in a 45-year-old male is consistent with the clinical presentation of a spontaneous pneumothorax. *Pleural Effusion* - A pleural effusion would typically present as a **blunting of the costophrenic angle** and a **meniscus sign** (concave upper border of fluid), which are not the primary features seen here. - While fluid can cause chest pain and shortness of breath, the distinct visceral pleural line and absent lung markings point away from an effusion as the primary diagnosis. *Pulmonary Edema* - Pulmonary edema is characterized by **cardiomegaly**, **perihilar haziness**, **Kerley B lines**, and often **bilateral effusions**, none of which are evident on this X-ray. - The clear lung field with absent markings is contrary to the diffuse alveolar or interstitial opacities seen in pulmonary edema. *Consolidation* - Consolidation, typically due to pneumonia, shows as a **lobar or segmental opacification** with **air bronchograms**, indicating fluid or cells filling the alveoli while the airways remain open. - This image clearly demonstrates a collapsed lung with air in the pleural space, not opacified lung tissue or air bronchograms.

Q: The following pattern in CT scan shown below can occur due to spread from:

Pulmonary artery. ***Pulmonary artery*** - The CT scan demonstrates a **miliary pattern** with numerous small (1-3mm), discrete nodules showing **random distribution** throughout both lungs - This random distribution is the hallmark of **hematogenous spread via the pulmonary arteries** - When pathogens or tumor cells reach the pulmonary arteries (from right heart or systemic venous circulation), they disseminate uniformly throughout lung parenchyma - Classic examples include **miliary tuberculosis** and **hematogenous metastases** (thyroid, renal, melanoma) *Lymphatics* - Lymphatic spread produces a **perilymphatic distribution**, NOT a miliary/random pattern - Nodules appear along lymphatic pathways: peribronchovascular bundles, interlobular septa, and subpleural regions - Creates a characteristic beaded or nodular appearance along lymphatic routes - Seen in **sarcoidosis** and **lymphangitic carcinomatosis**, which do NOT present with miliary patterns *Bronchial vein* - Bronchial veins drain deoxygenated blood from bronchial walls to the systemic circulation (azygos/hemiazygos system) - This is NOT a recognized pathway for producing miliary lung nodules in standard radiology literature - Miliary patterns specifically refer to pulmonary arterial hematogenous dissemination *All of the above* - Incorrect: The miliary pattern is specifically caused by **pulmonary artery spread only** - The random distribution seen in the image is pathognomonic for hematogenous spread via pulmonary arteries, not lymphatic or bronchial venous routes

Question 1

The CT chest shows presence of:

Accepted Answer

Meniscus sign

Answer

Crescent sign

Answer

Tree in bud sign

Answer

Loculated empyema

Question 2

A 4-year-old child with high grade fever with chills and rigors for past 4 days and fast breathing is brought to the hospital. On examination subcostal recession and nasal flaring is noted. Since patient is already on antibiotics for past 3 days from another hospital a Chest X-ray and CT Chest was ordered. The diagnosis is:

Accepted Answer

Massive right sided parapneumonic effusion

Answer

Massive pan consolidation

Answer

Right sided hydro-pneumothorax

Answer

Right sided segmental collapse

Question 3

The chest X-ray of a cystic fibrosis patient shows presence of:

Accepted Answer

Bronchiectasis

Answer

Left lower lobe pneumonia

Answer

Bronchopneumonia

Answer

Right middle lobe collapse

Question 4

An axial HRCT of the chest is shown. The image demonstrates small peripheral branching opacities due to mucoid impaction of contiguous branching bronchioles. What is the most likely diagnosis?

Accepted Answer

Endobronchial tuberculosis

Answer

Allergic bronchopulmonary aspergillosis

Answer

Pulmonary alveolar proteinosis

Answer

Sarcoidosis

Question 5

The CT chest image shows large bullae in bilateral lung fields. This is diagnostic of which condition?

Accepted Answer

Emphysema

Answer

Pneumonia

Answer

Bronchiectasis

Answer

Interstitial fibrosis

Question 6

A chest X-ray shows bilateral reticular nodular shadows in both lung fields. The diaphragm is not flattened and the cardiothoracic ratio appears normal. What is the most likely pattern seen?

Accepted Answer

Reticular shadows

Answer

Emphysema

Answer

Pulmonary edema

Answer

Pericardial effusion

Question 7

The image shows a standing upright chest X-ray with pleural reflection and a straight horizontal air-fluid level with absence of meniscus sign. What is the most likely diagnosis?

Accepted Answer

Hydropneumothorax

Answer

Pleural effusion

Answer

Pneumothorax

Answer

Empyema

Question 8

The CT chest image shows a hazy increased attenuation with preserved bronchial and vascular markings. What pattern is demonstrated?

Accepted Answer

Ground glass pattern

Answer

Crazy paving pattern

Answer

Honeycomb pattern

Answer

Tree-in-bud pattern

Question 9

A 45-year-old male presents with sudden onset shortness of breath and chest pain. A chest X-ray is obtained. What is the most likely diagnosis based on the image?

Accepted Answer

Pneumothorax

Answer

Pleural Effusion

Answer

Pulmonary Edema

Answer

Consolidation

Question 10

The following pattern in CT scan shown below can occur due to spread from:

Accepted Answer

Pulmonary artery

Answer

Lymphatics

Answer

Bronchial vein

Answer

All of the above

Chest Radiology — MCQs

Chest Radiology — MCQs

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