Primary angiosarcoma of the small intestine metastatic to peritoneum with intestinal perforation: a case report and review of the literature.

The study reports on a case of primary angiosarcoma of the small intestine in a 43-year-old woman presenting with intestinal perforation and metastasis to the peritoneum, along with a pertinent literature review. After hospitalization, an exploratory laparotomy was undertaken to aid in her diagnosis, followed by palliative intestinal resection with enteroenterostomy. The pathological examination and immunohistochemistry of resected tumor tissues confirmed the diagnosis. Moreover, analysis of seven reported cases of primary intestinal angiosarcoma in the literature revealed that patients often present with abdominal pain or recurrent gastrointestinal (GI) bleeding, dying within six months of diagnosis or resection surgery. Altogether, these findings illustrate that, despite volume-reducing palliative surgery, the prognosis of primary angiosarcoma of the small intestine remains poor for the majority of patients.