Mesothelioma Navy Mesothelioma Diagnosis & Treatment 5 — Questions and Answers
Question 1: Which combination immunotherapy regimen showed improved overall survival versus chemotherapy in the CheckMate 743 trial for pleural mesothelioma?
- Pembrolizumab + carboplatin
- Nivolumab + ipilimumab (Correct answer)
- Atezolizumab + bevacizumab
- Durvalumab + tremelimumab
Correct answer: Nivolumab + ipilimumab
CheckMate 743 demonstrated that nivolumab (PD-1 inhibitor) plus ipilimumab (CTLA-4 inhibitor) improved median overall survival to 18.1 months versus 14.1 months with chemotherapy.
Question 2: What is the significance of 'PD-L1 expression' in mesothelioma treatment planning?
- It predicts which patients will respond to surgery only
- High PD-L1 expression may predict better response to immune checkpoint inhibitor therapy (Correct answer)
- It is used to determine the dose of cisplatin
- Low PD-L1 expression always means the tumor is early stage
Correct answer: High PD-L1 expression may predict better response to immune checkpoint inhibitor therapy
PD-L1 expression on tumor cells may correlate with response to PD-1/PD-L1 inhibitors, helping guide immunotherapy decisions, though it is not an absolute predictor.
Question 3: Which palliative intervention is most appropriate for a mesothelioma patient experiencing severe dyspnea due to massive pleural effusion, when long-term surgery is not planned?
- Chest wall radiation
- Therapeutic thoracentesis or indwelling pleural catheter placement (Correct answer)
- High-dose corticosteroids
- Urgent lobectomy
Correct answer: Therapeutic thoracentesis or indwelling pleural catheter placement
Draining the fluid via thoracentesis or placing a permanent drainage catheter rapidly relieves dyspnea caused by large pleural effusions in non-surgical candidates.
Question 4: A mesothelioma patient on cisplatin-based chemotherapy develops significant nephrotoxicity. Which modification is most appropriate?
- Replace cisplatin with carboplatin, which has lower nephrotoxicity (Correct answer)
- Stop all chemotherapy permanently
- Add a nephrotoxic antibiotic to treat secondary infection
- Increase the dose of pemetrexed to compensate
Correct answer: Replace cisplatin with carboplatin, which has lower nephrotoxicity
Carboplatin is less nephrotoxic than cisplatin and is used as a substitution for patients who cannot tolerate cisplatin due to renal impairment.
Question 5: What is the role of PET-CT in mesothelioma staging and management compared to CT alone?
- PET-CT replaces biopsy and confirms diagnosis without tissue sampling
- PET-CT detects distant metastatic disease and involved lymph nodes not apparent on CT, improving staging accuracy (Correct answer)
- PET-CT is used exclusively to plan radiation fields
- PET-CT measures tumor size more accurately than CT
Correct answer: PET-CT detects distant metastatic disease and involved lymph nodes not apparent on CT, improving staging accuracy
PET-CT identifies metabolically active metastases and nodal involvement beyond what anatomical CT can show, preventing futile surgery in patients with occult distant disease.
Question 6: Which organization classifies mesothelioma as a 'presumptive' service-connected condition for veterans with documented asbestos exposure during military service?
- The Social Security Administration
- The Department of Veterans Affairs (VA) (Correct answer)
- The Centers for Disease Control (CDC)
- The Occupational Safety and Health Administration (OSHA)
Correct answer: The Department of Veterans Affairs (VA)
The VA recognizes mesothelioma as presumptively service-connected for veterans with in-service asbestos exposure, streamlining the disability claims process.
Question 7: What does 'multimodality treatment' mean in the context of mesothelioma, and why is it recommended for eligible patients?
- Using multiple imaging modalities to monitor the tumor over time
- Combining surgery, chemotherapy, and radiation to maximize cytoreduction and local control (Correct answer)
- Administering two different chemotherapy drugs simultaneously
- Alternating between immunotherapy and chemotherapy every cycle
Correct answer: Combining surgery, chemotherapy, and radiation to maximize cytoreduction and local control
Multimodality treatment integrates surgery (EPP or P/D), systemic chemotherapy, and radiation to attack mesothelioma from multiple angles, offering the best chance of extended survival in appropriate candidates.
Mesothelioma Navy Mesothelioma Diagnosis & Treatment 5
Which combination immunotherapy regimen showed improved overall survival versus chemotherapy in the CheckMate 743 trial for pleural mesothelioma?