Adverse event | Grade 1 | Grade 2 | Grade 3 | Grade 4 | Grade 5 |
SVC syndrome | Asymptomatic; incidental finding of SVC thrombosis | Symptomatic, medical intervention indicated (eg, anticoagulation, radiation, or chemotherapy) | Severe symptoms; multimodality intervention indicated (eg, anticoagulation, chemotherapy, radiation, stenting) | Life-threatening consequences; urgent multimodality intervention indicated (eg, lysis, thrombectomy, surgery) | Death |
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