2896
After 5 days of treatment with IL-2, the patient developed a hemorrhagic lesion that progressed to toxic epidermal necrolysis, as well as grade 4 pancytopenia.
 adverse event: developed 
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: developed 