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Short Neoadjuvant Hemithoracic IMRT for MPM

Brief Summary

Malignant pleural mesotheliomas (MPMs) are tumours associated with asbestos exposure involving the tissue lining surrounding the lung. Radiation therapy (RT) dramatically reduces the risk of tumour recurrence within the irradiated area (>90%). But patients continue to succumb to MPMs due to the tumour spreading outside the chest cavity. This may be due to tumour cells inadvertently contaminating areas outside the chest cavity during surgery. The study will look at whether giving a short intense course of chest radiation just prior to surgery will sterilized these tumour cells and thus, avoid or reduce contamination of the areas outside the chest cavity. The investigators hypothesize that short neoadjuvant (pre-operative) hemithoracic RT, followed by immediate planned extrapleural pneumonectomy (EPP) (+/- adjuvant chemotherapy) will reduce the risk of intra-operative seeding and reduce the incidence of distant metastatic disease.

Tracking Information
First Received DateNovember 21, 2008
Last Changed DateSeptember 20, 2017
Start DateOctober 2008
Anticipated Primary Completion DateJuly 2018
Primary Outcome Measures

The primary outcome for the study will be the proportion of patients treated as per protocol without treatment related mortality. [Time Frame: After completion of therapy: every 4 wks for 3 mos, then every 6 wks for 6 mos, then every 2 mos for 12 mos, then every 3 mos for 2 yrs, then every 6 mos for 5 years]

Secondary Outcome Measures

To evaluate: acute and late morbidity related to treatment; local & distant recurrence, disease free & overall survival; identify factors/parameters associated with increased risk of treatment morbidity [Time Frame: After completion of therapy: every 4 wks for 3 mos, then every 6 wks for 6 mos, then every 2 mos for 12 mos, then every 3 mos for 2 yrs, then every 6 mos for 5 years]

Descriptive Information
PhasePhase 1/Phase 2
Study TypeInterventional
Condition
  • Malignant Pleural Mesothelioma
Intervention
  • Other: Pre-op RT +/- chemotherapy
Study Arms / Comparison Groups1 / 0
Detailed Description

The study is a phase I/II prospective single cohort clinical feasibility study. 100 patients with early stage resectable malignant pleural mesothelioma will be enrolled into the study. Patients will have a baseline PET scan. Patients on the study will receive IMRT for approximately 1 week of 5 daily treatments. 1 week post-RT, they will proceed with an extrapleural pneumonectomy. If the mediastinal lymph nodes that are removed during surgery are positive for tumour cells, 3 cycles of chemotherapy, consisting of raltitrexed and cisplatin OR Pemetrexed and cisplatin, will be given 6-12 weeks post-surgery. Before and during treatment, side effects will be assessed. After treatment, follow up visits will be conducted every 1 to 2 months for the first year, and every 3 months for the second year. At each visit, a history and physical examination will be performed and ECOG performance status will be assessed. Routine tests will include CBC, liver profile, creatinine and chest x-ray. CT thorax and abdomen will be done at 3, 6, 12, 18, and 24 months. Additional test may be done at the discretion of the oncologist if the patient becomes symptomatic. The study will evaluate the feasibility and safety of short pre-operative RT, and may help confirm the intraoperative seeding hypothesis. Preoperative RT may also reduce the risk of both local and distant spread and, ultimately, improve overall survival. By shortening overall treatment time, it may also improve patient compliance and convenience. We may be able to give chemotherapy only to patients that are at highest risk and avoid it in others.

Recruitment Information
Recruitment StatusRecruiting
Anticipated Enrollment100
GenderAll
Ages18 Years - N/A
Accepts Healthy VolunteersNo
Contact John Cho, MD
Email: john.cho@rmp.uhn.on.ca
Phone: 416 946 2124
Eligibility Criteria

Inclusion Criteria:

- ECOG performance status of 0-2

- Good pulmonary function precluding radiation therapy (FEV>1 L or >40% predicted or DLCO >45% predicted)

- Any patient wiht a new histological diagnosis of malignancy pleural mesothelioma (MPM). Sarcomatoid or biphasic histologies can be included but will be analyzed separately due to their poor prognosis

- Stage T1-2N0M0 based on conventional investigations and tests. Selected stage T3N0M0 may be included at the discretion of the surgeon if deemed resectable.

- Suitable for combined modality therapy

- Informed consent

Exclusion Criteria:

- Distant metastatic disease

- Previous thoracic irradiation

- Serious non-malignant disease (e.g. cardiovascular, pulmonary, systemic lupus erythematosus (SLE), scleroderma) which would preclude definitive radiation treatment

- Previous chemotherapy for this or concurrent malignancy

- Previous concomitant malignancies except for patients with non-melanoma skin cancer, contralateral non-invasive breast cancer, prostate cancer treated with curative intent or carcinoma in situ of any other site. In addition, patients with invasive cancers treated more than 3 years previously and without evidence of recurrence will be eligible

- Women who are currently pregnant or lactating

Administrative Information
NCTIDNCT00797719
Responsible Party,
SponsorUniversity Health Network, Toronto
Verification DateSeptember 2017
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