Published on: November 24, 2025
Categorized as: Investing in Discovery
Prospective International Observational Study on Epithelioid Hemangioendothelioma: (POEM)

Investing in Discovery
This multinational study is led by Dr. Silvia Stacchiotti at the Fondazione IRCCS Istituto Nazionale dei Tumori (INT) in Milan, Italy, in collaboration with Professor Robin Jones at The Royal Marsden Hospital (RMH) and Paul Huang, PhD, at the Institute of Cancer Research (ICR), both in London.
Clinical and translational research aims:
- Gather data on the clinical presentation, natural history, and treatment outcomes in people with EHE
- Identify cytokine and hormone biomarkers and build patient-derived preclinical models that will enable validation of new therapeutic targets
Partners in Science
The EHE Foundation, together with advocacy partners at EHE Rare Cancer Charity UK and EHE ITALIA Associazione Non Solo Laura ODV, has invested in this global discovery initiative that can improve our understanding of EHE biology and natural history, laying a solid foundation for improved treatments and better outcomes for patients.
Outcomes & Progress
Key goals include description of demographics, clinical presentation, tumor-related symptoms and pain, prognostic factors, radiological features, and treatment response by RECIST 1.1 criteria.
The full title of this study is "The Evaluation of Cytokines and Hormones as Biomarkers for Epithelioid Haemangioendothelioma and Generation of Patient-derived Preclinical Models to Assess the Activity of Anticancer Agents and Validate Novel Therapeutic Targets."
Learn more about POEM → POEM Study - ClinicalTrials.gov (NCT06680401).
Publications and Presentations Resulting From This Research

Activity of sirolimus in patients with progressive epithelioid hemangioendothelioma: A case-series analysis within the Italian Rare Cancer Network
Stacchiotti S, Simeone N, Lo Vullo S, Baldi GG, Brunello A, Vincenzi B, Palassini E, Dagrada G, Collini P, Morosi C, Greco FG, Sbaraglia M, Dei Tos AP, Mariani L, Frezza AM, Casali PG. Activity of sirolimus in patients with progressive epithelioid hemangioendothelioma: A case-series analysis within the Italian Rare Cancer Network. Cancer 2021.

Outcome of patients (PTS) with advanced epithelioid hemangioendothelioma (EHE) after failure on sirolimus (S)
Claudia Giani, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy, Milan, Italy, J Clin Oncol 41, 2023 (suppl 16; abstr 11574)

RADIOLOGIC RESPONSES IN EPITHELIOID HEMANGIOENDOTHELIOMA: BEYOND RECIST?
Vanzulli A, Tinè G, Greco F, et. al., RADIOLOGIC RESPONSES IN EPITHELIOID HEMANGIOENDOTHELIOMA: BEYOND RECIST?, ESMO Rare Cancers, 4

GDF-15 AS A PROGNOSTIC FACTOR IN PATIENTS WITH EPITHELIOID HEMANGIOENDOTHELIOMA
Poster Presentation, CTOS 2025, Claudia Giani, MD, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Lombardia, Italy

PAIN ASSESSMENT CRITERIA (PAC) ANTICIPATE RECIST PROGRESSION AND CORRELATE WITH BLOOD LEVELS OF GROWTH DIFFERENTIATION FACTOR 15 (GDF15) IN EPITHELIOID HEMANGIOENDOTHELIOMA (EHE)
Poster Presentation, CTOS 2025, Luca Zambelli, MD, Palliative Care Specialist Fondazione IRCCS Istituto Nazionale dei Tumori di Milano, Milan, Lombardia, Italy

Translating molecular mechanisms of epithelioid hemangioendothelioma to improve patient outcome
Alessia Beretta, Sandro Pasquali, et. al., Translating molecular mechanisms of epithelioid hemangioendothelioma to improve patient outcome, Critical Reviews in Oncology/Hematology, Volume 217, 2026, 105021, ISSN 1040-8428

How to foster new treatment development in ultra-rare tumours? Joint EMA-EORTC multi-stakeholder workshops on ultra-rare sarcomas as a model for rare cancers
Silvia Stacchiotti, Pierre Demolis, et. al., How to foster new treatment development in ultra-rare tumours? Joint EMA-EORTC multi-stakeholder workshops on ultra-rare sarcomas as a model for rare cancers, Cancer Treatment Reviews, Volume 140, 2025, 103003, ISSN 0305-7372,
