Concurrent Ulcerative Colitis in a Pregnant Patient with Rheumatoid Arthritis: A Case Report.

We herein report a rare concurrent case of ulcerative colitis (UC) in a pregnant woman with rheumatoid arthritis (RA), which was well managed by biologics. When a 32-year-old woman with seropositive RA became pregnant, she began experiencing hematochezia; colonoscopy revealed diffuse inflammation with multiple ulcers. Based on clinical examinations and pathological assessments, she was diagnosed with severe UC. Although prednisolone had no curative effect and infliximab caused an infusion reaction, golimumab successfully induced remission with normal delivery. This case report describes the successful treatment of a pregnant woman with UC and RA through biologics administration.