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ORPHA:64722Disease
Also called IGM · Idiopathic granulomatous mastitis
What it is
A rare gynecologic or obstetric disease characterized by a painful, palpable breast mass with relative sparing of the subareolar regions, often associated with inflammation of the overlying skin and accompanied by axillary lymphadenopathy. It usually occurs in young parous women with a history of breast-feeding. The diagnosis of idiopathic granulomatous mastitis requires that other granulomatous lesions in the breast be excluded.
Key facts
- Prevalence
- 1-9 / 100 000
- Age of onset
- Adolescent, Adult, Elderly
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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