Mesothelioma Diagnosis Diagnostic Imaging 3

Question 1

Which radiologic sign on chest X-ray suggests mesothelioma has encased and contracted the affected hemithorax?

Accepted Answer

Ipsilateral volume loss with pleural thickening

Answer

Contralateral mediastinal shift

Answer

Bilateral pleural effusions

Answer

Apical pleural capping

Question 2

CT-guided core needle biopsy of a pleural mass in suspected mesothelioma is preferred over fine needle aspiration (FNA) because:

Accepted Answer

It provides tissue architecture needed for subtyping

Answer

It is less invasive

Answer

It avoids radiation exposure

Answer

It provides faster results

Question 3

Which nuclear medicine finding on PET scan is associated with higher-grade or sarcomatoid mesothelioma?

Accepted Answer

High SUV (standardized uptake value)

Answer

Low SUV

Answer

Uniform low-level uptake

Answer

Absent FDG uptake

Question 4

Pleural plaques seen on CT are important in mesothelioma diagnosis because they indicate:

Accepted Answer

Prior asbestos exposure

Answer

Current active tumor

Answer

Bacterial infection

Answer

Autoimmune pleuritis

Question 5

In peritoneal mesothelioma, which CT feature best predicts completeness of cytoreductive surgery?

Accepted Answer

Peritoneal cancer index (PCI) score

Answer

Ascites volume

Answer

Tumor size at a single location

Answer

Presence of liver metastases

Question 6

Which imaging finding would most likely prompt a change from surgical to palliative management in pleural mesothelioma?

Accepted Answer

Mediastinal lymph node involvement on PET/CT

Answer

Small ipsilateral pleural effusion

Answer

Pleural thickening less than 5 mm

Answer

Single pleural nodule without invasion