Inflammatory fibroid polyp is a very rare tumor involving the gastrointestinal tract and especially the stomach and small bowel. It presents either as a solitary pedunculated or sessile lesion arising from the submucosa. Despite its large size and sometimes very infiltrating growth, the polyp is benign and has a good prognosis. The aetiology remains unknown but it probably represents a reactive proliferation similar in many respects to the granuloma pyogenicum. We report an ileal case which presented itself as an acute intussusception. The very typical and complete sonographic and tomodensitometric findings of this intussusception are detailed. The polyp alone does not have noteworthy radiological characteristic signs and must be included in the large and essentially histological differential diagnostic of gastrointestinal tumors.