2830
We report four cases of hemodynamically significant pericardial effusion in patients with refractory lymphoma who were receiving gemcitabine, all of whom had a history of mediastinal radiation without subcarinal blocking.
 adverse event: in 
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: adverse event, potential therapeutic event 
Text: {0} 
Answer:
 adverse event: in 