Chest Radiology Practice Questions

Q: Which of the following conditions is associated with the presence of Kerley B lines on chest X-ray?

Interstitial edema. **Explanation:** **Kerley B lines** are short (1–2 cm), thin, horizontal lines seen at the lung periphery, perpendicular to the pleural surface, most commonly at the costophrenic angles. They represent **thickened interlobular septa** caused by the accumulation of fluid or cellular infiltration. 1. **Why Interstitial Edema is correct:** In congestive heart failure, increased pulmonary venous pressure leads to fluid transudation into the interstitial space. When this fluid accumulates in the interlobular septa, it becomes visible as Kerley B lines. This is a hallmark sign of the **interstitial phase** of pulmonary edema (PCWP 18–25 mmHg). 2. **Why other options are incorrect:** * **COPD:** Typically presents with signs of hyperinflation, such as flattened diaphragms, increased retrosternal space, and a tubular heart. It does not cause septal thickening unless complicated by heart failure. * **Pulmonary Artery Hypertension (PAH):** Characterized by enlargement of the central pulmonary arteries with "pruning" (abrupt narrowing) of peripheral vessels. * **Pulmonary Plethora:** Refers to increased pulmonary vascularity (seen in left-to-right shunts like ASD/VSD). It manifests as enlargement of both central and peripheral vessels, not septal lines. **High-Yield Clinical Pearls for NEET-PG:** * **Kerley A lines:** Longer (2–6 cm) lines radiating from the hila toward the upper lobes; represent fluid in the deep medullary septa. * **Differential Diagnosis for Kerley B lines:** Remember the mnemonic **"CHAL"**: **C**HF (most common), **H**umidifier lung (Hypersensitivity pneumonitis), **A**lveolar cell carcinoma (or Lymphangitic carcinomatosis), and **L**ymphoma/Lymphangiectasia. * **Stages of CHF on CXR:** Cephalization (Stage 1) → Kerley lines/Interstitial edema (Stage 2) → Bat-wing opacities/Alveolar edema (Stage 3).

Q: The following CT chest shows the presence of?

Emphysema. ***Emphysema*** - CT chest shows characteristic **low-attenuation areas** (hypodense regions) and **bullae** formation with **vascular rarefaction** in lung parenchyma. - **Hyperinflation** with increased anteroposterior diameter and flattened diaphragm are typical CT findings of emphysema. *Artifact* - CT artifacts appear as **streak lines**, **motion blur**, or **beam hardening** effects that don't represent actual pathology. - Would not show the **parenchymal destruction** and **air trapping** pattern characteristic of emphysema. *Silicosis* - CT typically shows **upper lobe nodules** with **eggshell calcification** of hilar lymph nodes from silica dust exposure. - Presents with **progressive massive fibrosis** rather than the **low-attenuation areas** seen in emphysema. *Pneumonoultramicroscopicsilicovolcanoconiosis* - This is essentially a **fancy term for silicosis-like disease** caused by volcanic ash and fine silica particles. - Would show **fibrotic changes** and **nodular patterns** similar to silicosis, not the **hyperinflated** appearance of emphysema.

Q: Water lilly appearance in a chest radiograph suggests which of the following conditions?

Ruptured hydatid cyst. **Explanation:** The **Water Lily sign** (also known as the Camelot sign) is a pathognomonic radiological finding for a **ruptured pulmonary hydatid cyst** caused by *Echinococcus granulosus*. 1. **Why the correct answer is right:** A hydatid cyst consists of an outer pericyst (host tissue), a middle ectocyst, and an inner endocyst. When the cyst ruptures into the bronchial tree, air enters the space between the pericyst and the endocyst (perivesicular lucency). As the fluid drains, the endocyst collapses and its membranes float on the residual fluid within the cavity. On a chest X-ray, these undulating, crumpled membranes resemble the leaves of a water lily floating on a pond. 2. **Why the incorrect options are wrong:** * **Metastases (A):** Typically present as multiple, well-defined "cannonball" lesions. * **Cavitating metastasis (B):** Common in squamous cell carcinomas; they appear as thick-walled cavities but lack floating internal membranes. * **Aspergilloma (C):** Characterized by the **Monod sign** or **Air-crescent sign**, where a fungal ball (mycetoma) sits within a pre-existing cavity. Unlike the water lily sign, the mass is solid and gravity-dependent but does not consist of floating membranes. 3. **High-Yield Clinical Pearls for NEET-PG:** * **Casoni Test:** An immediate hypersensitivity skin test used for diagnosis (though now largely replaced by ELISA). * **PAIR Technique:** Puncture, Aspiration, Injection (of scolicidal agents like hypertonic saline), and Re-aspiration. Note: This is generally avoided in the lungs due to the risk of anaphylaxis and pneumothorax. * **Drug of Choice:** Albendazole. * **Other signs:** *Whale tail sign* (ruptured membranes) and *Meniscus sign* (early rupture).

Q: What condition is characterized by a 'dirty chest' appearance on a chest X-ray?

Chronic bronchitis. ### Explanation **Correct Option: A. Chronic Bronchitis** The term **"Dirty Chest"** is a classic radiological sign of Chronic Bronchitis. It refers to a generalized increase in lung markings, particularly in the lower zones. This appearance is caused by: 1. **Peribronchial thickening:** Chronic inflammation leads to thickening of the bronchial walls (seen as "tram-track" shadows). 2. **Perivascular cuffing:** Inflammation and congestion around the pulmonary vessels. 3. **Prominent bronchovascular markings:** These create a fuzzy, indistinct, or "dirty" appearance of the lung parenchyma. **Why the other options are incorrect:** * **B. Tuberculosis (TB):** Typically presents with apical infiltrates, cavitary lesions (in post-primary TB), hilar lymphadenopathy, or Ghon complexes. It does not produce a generalized "dirty" appearance. * **C. Bronchiectasis:** Characterized by more distinct features like **"Signet ring sign"** (on CT) or coarse "tram-track" opacities and "honeycombing" in advanced stages, rather than a generalized fuzzy appearance. * **D. Cystic Fibrosis:** While it involves chronic bronchitis, its hallmark radiological features are bronchiectasis, mucus plugging (finger-in-glove sign), and hyperinflation. **High-Yield Clinical Pearls for NEET-PG:** * **Chronic Bronchitis vs. Emphysema:** In COPD, the "Dirty Chest" is associated with the **"Blue Bloater"** (Chronic Bronchitis), whereas a **"Hypertranslucent/Clear Chest"** with a vertical heart and flattened diaphragm is associated with the **"Pink Puffer"** (Emphysema). * **Tram-track shadows:** These represent thickened bronchial walls seen in profile; they are common to both chronic bronchitis and bronchiectasis. * **Diagnosis:** Remember that Chronic Bronchitis is primarily a **clinical diagnosis** (productive cough for 3 months in 2 consecutive years), but the "dirty chest" is its most frequent radiological descriptor.

Q: The middle lobe of the lung is best visualized by which radiographic view?

Lordotic view. ### Explanation The **Lordotic view** (also known as the apical lordotic view) is the correct answer because of the anatomical orientation of the middle lobe and the lung apices. **1. Why the Lordotic View is Correct:** The right middle lobe (RML) is bounded superiorly by the horizontal fissure and inferiorly by the oblique fissure. In a standard upright position, these fissures are oriented obliquely to the X-ray beam, often causing the middle lobe to appear hazy or poorly defined. In the lordotic view, the patient leans backward, tilting the chest. This maneuver brings the **horizontal and oblique fissures into a plane parallel to the X-ray beam**, causing them to converge. This "projects" the middle lobe more clearly and is specifically used to evaluate **middle lobe collapse (atelectasis)** or to move the clavicles out of the way to visualize the **lung apices**. **2. Why Other Options are Incorrect:** * **AP and PA Views:** These are standard projections where the middle lobe overlaps with the lower lobe. While a "silhouette sign" on a PA view (loss of the right heart border) suggests middle lobe pathology, the anatomy itself is not "best visualized" or isolated in these views. * **Right Anterior Oblique (RAO) View:** While oblique views can help localize lesions, they are not the primary choice for the middle lobe. The lateral view is generally superior to oblique views for localizing the RML. **3. Clinical Pearls for NEET-PG:** * **Silhouette Sign:** Loss of the **right heart border** on a PA view indicates pathology in the **Right Middle Lobe**. * **Middle Lobe Syndrome:** Recurrent atelectasis or infection of the RML, often due to its long, thin bronchus and surrounding lymph nodes which can cause extrinsic compression. * **Apical Lesions:** The lordotic view is also the gold standard for visualizing **TB foci** or tumors in the lung apices that are otherwise obscured by the clavicles and first ribs.

Q: A radiograph shows an abnormal developmental condition of teeth. Which of the following is the most likely diagnosis based on typical radiographic findings?

Regional odontodysplasia. **Explanation:** **Regional Odontodysplasia (ROD)**, also known as **"Ghost Teeth,"** is a rare, non-hereditary developmental anomaly affecting the ectodermal and mesodermal tooth components. 1. **Why it is correct:** The hallmark radiographic finding of ROD is the "ghost-like" appearance of teeth. This occurs due to a marked reduction in radiodensity, resulting from thin layers of enamel and dentin and abnormally large pulp chambers. The boundaries between enamel and dentin are often indistinguishable. It typically affects a localized "region" (usually a single quadrant), and the affected teeth are often unerupted or have short, malformed roots. 2. **Why other options are incorrect:** * **Dentinal Dysplasia:** This is a hereditary condition primarily affecting the dentin. Radiographically, Type I shows "rootless teeth" with obliterated pulp chambers, while Type II shows "thistle-tube" pulp chambers. It does not produce the generalized "ghostly" thinning of all dental layers seen in ROD. * **Dentinogenesis Imperfecta:** This is a genetic defect of dentin. Radiographically, it is characterized by bulbous crowns, cervical constriction (giving a "bell-shaped" appearance), and early obliteration of pulp chambers and root canals. **High-Yield Clinical Pearls for NEET-PG:** * **Etiology:** Idiopathic; unlike other dental dysplasias, it is **not hereditary**. * **Distribution:** Usually unilateral and localized to one quadrant (maxilla > mandible). * **Key Radiographic Sign:** "Ghost teeth" (thin enamel/dentin + wide pulp). * **Clinical Presentation:** Delayed eruption, gingival swelling, or abscesses in the affected area.

Question 1

Which of the following conditions is associated with the presence of Kerley B lines on chest X-ray?

Accepted Answer

Interstitial edema

Answer

COPD

Answer

Pulmonary artery hypertension

Answer

Pulmonary plethora

Question 2

The following CT chest shows the presence of?

Accepted Answer

Emphysema

Answer

Artifact

Answer

Silicosis

Answer

Pneumonoultramicroscopicsilicovolcanoconiosis

Question 3

Water lilly appearance in a chest radiograph suggests which of the following conditions?

Accepted Answer

Ruptured hydatid cyst

Answer

Metastases

Answer

Cavitating metastasis

Answer

Aspergilloma

Question 4

What condition is characterized by a 'dirty chest' appearance on a chest X-ray?

Accepted Answer

Chronic bronchitis

Answer

Tuberculosis (TB)

Answer

Bronchiectasis

Answer

Cystic fibrosis

Question 5

Evaluate the following statements regarding mediastinal masses and their evaluation: Thymoma is the most common anterior mediastinal mass. Neurogenic tumors are the most common posterior mediastinal masses. MRI is the investigation of choice to evaluate anterior and posterior mediastinal masses. Extramedullary hematopoiesis is a type of anterior mediastinal mass. A mediastinal mass forms an acute angle with the lung surface. Indicate whether each statement is True (T) or False (F).

Accepted Answer

TTTFF

Answer

TFTFF

Answer

TFFFF

Answer

FFFFF

Question 6

A 35-year-old female presents with chest pain and shortness of breath. The patient reports recent alcohol consumption and denies any history of trauma, similar episodes, smoking, or pulmonary tuberculosis. Her occupational history indicates unemployment for the past 6 months, previously working in an IT firm. A chest X-ray has been performed. Which of the following statements is true regarding the management of the likely pathology?

Accepted Answer

Administer intercostal nerve blocks below the first rib and above the second rib.

Answer

Chest X-ray appears normal. Counsel the patient.

Answer

Perform HRCT followed by surgical intervention.

Answer

Perform a CT-guided biopsy.

Question 7

The middle lobe of the lung is best visualized by which radiographic view?

Accepted Answer

Lordotic view

Answer

Anteroposterior (AP) view

Answer

Right anterior oblique view

Answer

Posteroanterior (PA) view

Question 8

Which X-ray view best demonstrates a right-sided pleural effusion?

Accepted Answer

Left lateral decubitus view

Answer

Supine view

Answer

Right lateral decubitus view

Answer

All of the above

Question 9

A radiograph shows an abnormal developmental condition of teeth. Which of the following is the most likely diagnosis based on typical radiographic findings?

Accepted Answer

Regional odontodysplasia

Answer

Dentinal dysplasia

Answer

Dentinogenesis imperfecta

Answer

None of the above

Question 10

Cannon balls seen in the lungs are characteristic of which of the following?

Accepted Answer

Hypernephroma

Answer

Seminoma of the testes

Answer

Carcinoid tumor

Answer

Pheochromocytoma

Chest Radiology — MCQs

Chest Radiology — MCQs

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