Chronic recurrent multifocal osteomyelitis of the left femur associated with ulcerative colitis: a case report

Chronic recurrent multifocal osteomyelitis (CRMO) is a rare condition characterized by chronic relapsing noninfectious bone inflammation of unknown etiology. Although CRMO is considered an extraintestinal manifestation in patients with inflammatory bowel disease, most cases of CRMO are associated with Crohn's disease; very few are associated with ulcerative colitis (UC). We herein describe a 21-year-old patient with UC who developed recurrent left thigh pain. The patient was diagnosed with CRMO associated with UC, which was well controlled with azathioprine treatment.

Automated summary

CRMO is a rare condition characterized by chronic relapsing noninfectious bone inflammation, with most cases associated with Crohn's disease and very few associated with ulcerative colitis. In this case, a 21-year-old UC patient with recurrent left thigh pain was diagnosed with CRMO associated with UC, which was well controlled with azathioprine treatment.