Metastatic osteosarcoma presenting as a small-bowel polyp. A case report and review of the literature.

摘要: c Gastrointestinal metastases of osteosarcoma are an extraordinarily rare event and, as far we can determine, have been reported previously only 5 times; these cases represent unusual pattern progression. We describe a 21-year-old man with the right tibia that was removed 4 years previously. Two later, patient showed lung metastases. At his most recent presentation, he complained abdominal pain, nausea, vomiting, and anorexia. Radiologic examination revealed mass close to jejunum 3 nodules in liver. One metastasis ulcerated pedunculated polypoid located mucosa bowel, other involved entire thickness jejunum. This phenomenon represents alteration natural history result increased long-term survival. (Arch Pathol Lab Med. 2000;124:1682‐1684)