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Ventral hernia repair with mesh products is of increasing popularity. The long-term results of mesh repair of ventral hernia are superior to primary suture repair. However, occasional complications may still present. We report on a 77-year-old man who underwent ventral hernia repair with a mesh 5 years ago with complication of mesh migration into the urinary bladder and enterovesical fistula. The patient presented with lower urinary tract symptoms initially. By urinalysis, persistent hematuria and pyuria were found after antibiotic treatment. For further investigation of hematuria, intravenous urography was performed, which revealed a faint radio-opaque patch at the right pelvis. To obtain a more precise relationship between the lesion and the adjacent organs, computed tomography and cystoscopy were arranged. They confirmed a mesh with stone formation in the urinary bladder. To remove the mesh, segmental resection of the ileum and cystorrhaphy were performed.

Crohn disease is a chronic, transmural, inflammatory disease of the gastrointestinal tract with unknown etiology. It can affect any part of the gastrointestinal tract and may cause fistula, stricture, or abscess formation with disease progression. The preoperative diagnosis and definite management of this rare complication are challenges for physicians, urologists, and surgeons.