Epithelioid Haemangioendothelioma Observational Study

This observational study is collecting detailed data on Epithelioid Hemangioendothelioma (EHE), an extremely rare vascular cancer, to better understand how it presents, progresses, and responds to treatment. Researchers are also looking for biological markers in the blood and developing lab models from patient tissue to test potential new treatments. Anyone with a confirmed EHE diagnosis (by biopsy or surgery) of any age can participate, as long as they can comply with follow-up requirements. Participation involves sharing medical records, providing blood or tissue samples at various timepoints, and attending follow-up visits without any treatment intervention in this study. This summary was prepared with AI assistance to help patients understand the study in plain language.