551
Case 2 demonstrated after 40 months on chlorambucil the presence of a balanced translocation, t (1;5) (p36;q31) in 90% of the cells.
 adverse event: presence of 
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: presence of 