[Retroperitoneal haematoma after injection of botulinum toxin A in the bladder wall]

In this case report, a 77-year-old female attended a department of urology for a flexible cystoscopy in local anaesthesia with injection of botulinum toxin A in the bladder wall. One day later, she presented with suprapubic pain and hypotension which stabilized spontaneously. She was discharged but presented twice within the following week with severe bladder pain that was treated with mild analgesics. Eight days after the procedure she was readmitted with a haematoma of the abdomen and right flank and continuous bladder pain. CT revealed a large retroperitoneal haematoma, which was managed conservatively.