Epidemiology

The global prevalence of mastitis in lactating women is approximately 10%, with estimates ranging between 2.5% and 20%.[1][2]​​​ Duct ectasia (periductal mastitis or dilated ducts associated with inflammation) occurs in 5% to 9% of nonlactating women. Breast abscess develops in 3% to 11% of women with mastitis, with a reported incidence of 0.1% to 3.0% in breast-feeding women.[3]​​[4][5]​​​​

Tubercular mastitis is rare, even in tuberculosis-endemic countries, with a reported incidence between 0.1% and 3.0%.[6][7][8]​ Idiopathic granulomatous mastitis is a very rare breast condition.[9]

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