After non-restored sigmoid resection and terminal colostomy, the rectal stump can reopen, thereby occasioning a number of problems. We are reporting the case of a 79-year-old female patient who presented with spondylodiscitis due to a recto-rachidian fistula on a rectal stump subsequent to non-restored sigmoid resection. This case sheds light on a rare rectal stump complication. Initial treatment consisting in rectal drainage via transanal route did not suffice; rectal stump resection with omentoplasty was necessary.