All patients with symptomatic malignant SVCO deemed suitable for treatment either with radiation therapy or by stenting will be eligible. They will receive whichever treatment is deemed most clinically appropriate. Symptomatic response, time to onset of palliation, duration of symptom control and survival will be assessed.

Inclusion Criteria:

• Symptomatic clinical and radiological diagnosis of superior vena caval obstruction.
• Underlying histological diagnosis deemed appropriate for palliative radiotherapy as treatment by investigator. Patients with chemosensitive tumours such as small cell lung cancer (both untreated and recurrent), lymphoma and testicular tumours, will be eligible if radiation is deemed to be appropriate treatment.