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GRAnulomatous MAstitis REGistry Study
Sponsor: European Breast Cancer Research Association of Surgical Trialists
Summary
Idiopathic granulomatous mastitis (IGM) is a rare benign inflammatory breast condition with unknown cause, affecting approximately 2.4 per 100,000 women aged 20-40 years. Patients experience severe local symptoms including pain, redness, and recurrent abscesses that can last weeks to months and often mimic inflammatory breast cancer. Due to its rarity, mostly case reports and case series exist in the literature, leading to limited knowledge about risk factors, optimal treatment strategies, and clinical outcomes. The GRAMAREG study is the first European registry for patients with histologically confirmed idiopathic granulomatous mastitis. This retrospective/prospective observational cohort study aims to systematically evaluate the incidence, diagnostic features, clinical course, treatment strategies, and patient outcomes of this uncommon disease. The study collects both retrospective data (from January 1, 2015 onwards) and prospective data from participating sites across Europe. All diagnostic and therapeutic procedures are conducted according to institutional standards in clinical routine, as this is a non-interventional study. Patients in the prospective cohort are followed for up to 5 years to document symptom duration and recurrence rates.
Official title: A Retrospective / Prospective Cohort Study to Evaluate the Incidence, Diagnostic Features, Clinical Course and Treatment Strategies in Histologically Confirmed Idiopathic Granulomatous Mastitis
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
OBSERVATIONAL
Enrollment
1000
Start Date
2026-04-01
Completion Date
2036-04-01
Last Updated
2026-02-27
Healthy Volunteers
No
Locations (2)
University Hospital Düsseldorf
Düsseldorf, North Rhine-Westphalia, Germany
Department of Gynecology and Obstetrics University Hospital Schleswig-Holstein
Lübeck, Schleswig-Holstein, Germany