Mesothelioma Therapy Radiation Therapy 1 — Questions and Answers
Question 1: What is the primary role of radiation therapy in mesothelioma treatment?
- Curative monotherapy
- Palliative symptom control and adjuvant therapy (Correct answer)
- Replacing surgery
- First-line treatment
Correct answer: Palliative symptom control and adjuvant therapy
Radiation therapy in mesothelioma is primarily used for palliative symptom control and as adjuvant therapy after surgery rather than as a curative monotherapy.
Question 2: Hemithoracic radiation after EPP is intended primarily to:
- Replace chemotherapy
- Reduce local recurrence risk in the treated hemithorax (Correct answer)
- Stimulate immune response
- Improve breathing capacity
Correct answer: Reduce local recurrence risk in the treated hemithorax
Hemithoracic radiation after EPP targets the entire treated side of the chest to reduce local recurrence in the surgical field.
Question 3: Which radiation technique is considered most precise for mesothelioma, reducing dose to surrounding structures?
- 2D conventional radiotherapy
- Intensity-Modulated Radiation Therapy (IMRT) (Correct answer)
- Total body irradiation
- Brachytherapy
Correct answer: Intensity-Modulated Radiation Therapy (IMRT)
IMRT allows precise dose delivery with modulated beam intensity, sparing adjacent critical structures like the heart and contralateral lung.
Question 4: Prophylactic irradiation of procedure tracts is used in mesothelioma to prevent:
- Pleural effusion recurrence
- Seeding of tumor cells along biopsy or drain tracks (Correct answer)
- Pneumothorax
- Lymph node metastasis
Correct answer: Seeding of tumor cells along biopsy or drain tracks
Prophylactic irradiation of biopsy and drain tracts is used to prevent seeding of tumor cells along these procedure sites.
Question 5: Which organ is the primary dose-limiting structure during pleural mesothelioma radiation therapy?
- Spinal cord
- Contralateral lung (Correct answer)
- Liver
- Heart
Correct answer: Contralateral lung
The contralateral lung is the primary dose-limiting structure because radiation pneumonitis in the remaining lung can be fatal.
Question 6: Stereotactic Body Radiation Therapy (SBRT) is used in mesothelioma primarily for:
- Whole-chest treatment
- Treating discrete metastatic lesions (Correct answer)
- Replacing surgery entirely
- Intraoperative radiation
Correct answer: Treating discrete metastatic lesions
SBRT delivers high-dose, precisely targeted radiation to discrete metastatic lesions, offering palliative control with minimal surrounding tissue damage.
Mesothelioma Therapy Radiation Therapy 1
What is the primary role of radiation therapy in mesothelioma treatment?