The Association Research Circulation Osseous (ARCO) - the pre-eminent international association for the study of osteonecrosis and related disorders - is excited to partner with the EORS during their annual meeting in Madrid Spain in 2026. Both meetings will be held in the heart of Madrid at the historic Escuela Técnica Superior de Ingenieros Industriales – Universidad Politécnica de Madrid.

The ARCO meeting will precede the EORS meeting by 1 day and begin on Tuesday September 22, 2026. The meeting will feature numerous keynote speakers, panel discussions on controversial subjects, free papers and a poster session.  The following morning , Wednesday September 23, 2026, immediately prior to the commencement of the EORS meeting in the afternoon, both the EORS and ARCO will partake in a combined meeting with special lectures and combined panel discussions by experts on the basic, translational and clinical aspects of osteonecrosis.  There will be ample time for discussion, networking, and camaraderie!  The EORS meeting will follow this Wednesday morning program and occur from Wednesday September 23 to Friday September 2026.

There will be special discounts for attendees of both meetings, and a common website on the EORS platform for planning for accommodations, uploading of abstracts (for both the ARCO or the EORS meetings), registration and sign-up for other events. The abstract site is scheduled to open on February 1, 2026.

ARCO is thrilled to partner with the EORS in 2026 and looks forward to a highly academic and socially fulfilling experience. 

We look forward to seeing everyone in Madrid very soon!

Stuart B. Goodman, MD, PhD	Lynne C. Jones, PhD	Quanjun Cui, MD
President of ARCO	Executive Director, ARCO	Scientific Program Chair ARCO 2026