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We describe the side effects of 5-FU in a colon cancer patient who suffered severe mucositis, desquamating dermatitis, prolonged myelosuppression, and neurologic toxicity that required admission to the intensive care unit.
 ( adverse event: of ,  colon cancer patient who suffered severe mucositis, desquamating dermatitis, prolonged myelosuppression, and neurologic toxicity that required admission to the intensive care unit: Subject, mucositis: Subject.Disorder, desquamating dermatitis: Subject.Disorder, myelosuppression: Subject.Disorder, neurologic toxicity: Subject.Disorder, side effects: Effect, 5-FU: Treatment, 5-FU: Treatment.Drug, colon cancer: Treatment.Disorder) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: adverse event,potential therapeutic event, Arguments type: Treatment.Disorder,Treatment.Time_elapsed,Treatment.Dosage,Subject.Race,Treatment.Drug,Treatment.Route,Subject.Disorder,Treatment.Freq,Treatment,Effect,Subject.Population,Treatment.Duration,Combination.Drug,Subject,Subject.Age,Subject.Gender. 
Text: {0} 
Answer:
 ( adverse event: of ,  colon cancer patient who suffered severe mucositis, desquamating dermatitis, prolonged myelosuppression, and neurologic toxicity that required admission to the intensive care unit: Subject, mucositis: Subject.Disorder, desquamating dermatitis: Subject.Disorder, myelosuppression: Subject.Disorder, neurologic toxicity: Subject.Disorder, side effects: Effect, 5-FU: Treatment, 5-FU: Treatment.Drug, colon cancer: Treatment.Disorder) 