What Disease Could Cause Severe Intestinal Pain And Rashes On Legs?

My daughter, who is in her 40 s, has Crohn s disease. When she was 7 years old, she had severe pain, at which time we thought was appendicitis. The doctor thought it was merely a virus. After 2 weeks, she was admitted to the hospital. The doctors determined she had a disease that occurs in the intestines and a rash broke out on her legs. They told us the name of the disease (named after a French man or men) but we cannot remember the name of it. Our daughter will be going to Cleveland Clinic soon and we would like to be able to give them more detailed medical history. Thank you.