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Infantile fibrosarcoma is a rare tumor, belonging to the nonrhabdomyosarcoma, soft tissue sarcoma. It is mostly presented in infants, most commonly involving the extremities. We report a 5-month-old boy, presenting with digestive bleeding since the age of 3 months, initially diagnosed as cow's milk allergy, with a torpid evolution and anemia. He underwent laparoscopic exploration, with evidence of a mass in the small bowel. Resection and end-to-end anastomosis were performed. Because of inadequate microscopic margins ( less then 1 cm),