Original title: Disseminated Angiosarcoma With Multifocal Small-Bowel Involvement Presenting as Suspected Small-Bowel Bleeding
Mayu Tomita, Takashi Tashiro, Yoshiharu Yamaguchi, Kazunori Adachi +6 · September 2026
Angiosarcoma is a rare, aggressive cancer of the blood vessels, and it rarely affects the gut. Doctors treated a man in his 60s who had ongoing dark, bloody stools and severe low red blood cell counts that needed blood transfusions. To find the source of the hidden gut bleeding, doctors used two tools. First, the patient swallowed a tiny camera pill, called capsule endoscopy, which takes pictures as it travels. It revealed active bleeding and open sores in the upper small bowel. Next, doctors guided a specialized balloon-assisted scope into the digestive tract to look closer. They found bleeding tumors narrowing the intestine, along with more tumors in the lower bowel and colon. The cancer had spread widely, and the patient died 7 weeks after transfer.
Imagine your home's plumbing has a hidden leak that stains the ceiling every week. Normal inspections don't find it because the leak is inside a wall cavity where standard tools can't reach. Here, the patient's intestinal bleeding was like that hidden leak – caused by a rare cancer in a part of the gut that ordinary endoscopes can't see. The capsule camera and balloon endoscope worked like specialized moisture sensors and wall cameras to finally locate the problem.
Gastrointestinal bleeding is common, but rare causes like angiosarcoma are often overlooked. This case shows that when standard endoscopy fails, capsule and double-balloon endoscopy can reveal hidden malignancies. The autopsy correlation helps doctors recognize this rare cancer's presentation.
This is a single case report, so it cannot establish how often angiosarcoma causes GI bleeding. No treatment details are provided, so its effect on survival is unknown. The suggested periaortic origin is speculative based on one patient. The findings from capsule and balloon endoscopy are limited to this presentation and may not generalize.
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Disseminated Angiosarcoma With Multifocal Small-Bowel Involvement Presenting as Suspected Small-Bowel Bleeding — Mayu Tomita, Takashi Tashiro, Yoshiharu Yamaguchi et al. — DEN open — doi:10.1002/deo2.70408
Abstract licence: CC BY
Explanation generated by Synthesis from the abstract — it is not the original paper.