Metastatic osteosarcoma bowel perforation secondary to chemotherapy-induced tumour necrosis

Abstract

Osteosarcoma is the most common paediatric and adolescent primary bone malignancy and is highly chemosensitive. Gastrointestinal metastases from osteosarcomas are rare. Bowel perforation secondary to chemotherapy is a potential serious complication reported in ovarian, colorectal and haematological malignancies. We report the first documented case of chemotherapy-mediated bowel perforation in an osteosarcoma patient with gastrointestinal metastases. A man in his 20s, with a history of resected osteosarcoma in remission, presented with abdominal pain. A computed tomography (CT) scan demonstrated a large calcified intrabdominal mass (15×13×9 cm) consistent with new peritoneal disease. After one cycle of palliative ifosfamide and etoposide chemotherapy, he developed a large bowel perforation and neutropenic sepsis consequently requiring resection of the perforated mass. Chemotherapy-induced bowel perforation is a rare but serious complication that should be considered in patients with osteosarcoma, and other chemosensitive malignancies, with intra-abdominal metastases. Recommencement of systemic therapies after bowel complications must be assessed cautiously on a case-by-case basis.