Austrian Breast & Colorectal Cancer Study Group

Science from the heart of Europe

Enrollment target reached for the ABCSG 55N / AMBHER study

10.08.2026

The non-interventional ABCSG 55N / AMBHER study has reached an important milestone: The enrollment target of 500 patients was achieved in July 2026. Following the last patient inclusion on August 3, 2026, the study population comprises a total of 501 patients.

Enrollment completed ahead of schedule for the ABCSG 63 / ERIKA trial

13.07.2026

Recruitment for the phase II ABCSG 63 / ERIKA trial has been successfully completed. With the randomization of the 120th patient, the study reached its enrollment target two months ahead of schedule.

SOLTI Young European Workshop brings together young breast cancer specialists from across Europe

30.06.2026

The SOLTI Young European Workshop of the Spanish SOLTI – Cancer Research Group brought together 35 young breast cancer specialists from more than ten countries in Barcelona on 26–27 June 2026 to jointly develop new clinical trial concepts in breast cancer.

ABCSG Annual Report 2025 now available online!

18.05.2026

We are pleased to share the ABCSG Annual Report 2025. It provides an overview of an exceptionally successful and highly productive year for the ABCSG.

Editorial by Professor Michael Gnant published in Cancer Biology & Medicine

15.04.2026

We are pleased to share a recent editorial by ABCSG President Professor Michael Gnant, who was invited to present his assessments on the evolving landscape of breast cancer care in Cancer Biology & Medicine.

International Profile: CancerWorld Honors Prof. Michael Gnant
From Surgeon to Global Mentor

10.03.2026

CancerWorld, published by OncoDaily, features ABCSG-president Michael Gnant in its latest issue, highlighting his influential contribution to modern breast cancer research and treatment. The article portrays a physician-scientist who has repeatedly challenged established routines and encouraged critical thinking in clinical practice.

20 years at the helm of ABCSG:
Honor for Professor Michael Gnant

15.11.2025

At this year’s ABCSG Annual Meeting, Professor Michael Gnant was honored for his 20 years of pioneering work as President of the ABCSG. The tribute took place in the presence of numerous colleagues who emphasized his continuous dedication and his significant contribution to advancing clinical cancer research in Austria.

ABCSG 67N / CAROLEEN study: First Patient Enrolled

30.10.2025

The ABCSG is pleased to announce that the first patient from Austria has been enrolled in the ABCSG 67N / CAROLEEN at Sanatorium Hera under the leadership of  PI Yelena Devyatko.

We warmly congratulate PI Yelena Devyatko and the dedicated team in Sanatorium Hera on this important first milestone.

ABCSG 65 / DEFINITIVE: First patient randomized

09.10.2025

The ABCSG is proud to report that the first Austrian patient has been randomized in the ABCSG 65 / DEFINITIVE trial at LKH Hochsteiermark, site Leoben, under the lead of PI Dr. Thamer Sliwa.

Congratulations to Dr. Sliwa and his dedicated team in Leoben on achieving this important milestone.

ABCSG 61 / TEODOR: First Patient Registered in the Run-in Phase

14.08.2025

The ABCSG is pleased to announce another important milestone in the national phase II study ABCSG 61 / TEODOR (Neoadjuvant TrEatment Optimization driven by ctDNA and endOcrine Responsiveness). Under the coordination of Dr. Daniel Egle, the first patient was registered in the run-in phase at the Breast Health Center of the Department of Obstetrics and Gynecology at the Medical University of Innsbruck.

ABCSG 61 / TEODOR: First center opened for patient enrollment

30.07.2025

The new ABCSG study ABCSG 61 / TEODOR (Neoadjuvant TrEatment Optimization driven by ctDNA and endOcrine Responsiveness) has launched with the activation of its first site – the Center for Breast Health in the Department of Gynecology at the Medical University of Vienna, headed by Prof. Christian Singer.

ABCSG Featured in BIG Annual Report 2024

28.06.2025

The ABCSG is once again featured in the Breast International Group’s (BIG) Annual Report, which highlights the breadth of our activities and achievements throughout 2024.

Congratulations to Dominik Hlauschek on His First Full Publication in ESMO Open!

13.06.2025

A proud moment for the ABCSG statistics team: our colleague Dominik Hlauschek has just published his first full paper in ESMO Open — a key step in his scientific career. Congratulations – and many thanks to Christian Fesl for his leadership and to the whole statistics team for their support!

Editorial by ABCSG President Prof. Gnant in the British Journal of Surgery on the future of surgical research

04.06.2025

ABCSG President Prof. Michael Gnant has published an editorial in the British Journal of Surgery:

“The future of surgical research”
Oxford University Press, Volume 112, Issue 6, 03. Juni 2025
https://doi.org/10.1093/bjs/znaf095

ABCSG Annual Report 2024 now available online!

27.05.2025

We’re excited to share the 2024 ABCSG Annual Report with you. It offers an in-depth and accessible look at our accomplishments over the past year.

PALLAS 2^nd Call for Research Project Proposals
31 March 2025 – 28 April 2025

01.04.2025

Per study design, the treatment phase in PALLAS is followed by an extensive follow-up Phase of 10 years, until 2028. Up until then, biological samples and patient data will continue to be collected and documented at pre-defined intervals. Available datasets and samples, in combination with data and samples to be documented in the future, build a valuable resource for translational research and for addressing questions that yet need to be investigated in this patient cohort.