Isimila esiyingozi sezicubu ze-breast gland.Emhlabeni, uwuhlobo oluvame kakhulu lomdlavuza kubantu besifazane, uhlasela u-1/13 kuya ku-1/9 wabesifazane abaneminyaka ephakathi kuka-13 no-90. Futhi ungowesibili umdlavuza ovame kakhulu ngemva komdlavuza wamaphaphu (kuhlanganisa namadoda; ngoba umdlavuza webele eyakhiwe ngezicubu ezifanayo kwabesilisa nabesifazane, umdlavuza webele (RMG) ngezinye izikhathi kwenzeka emadodeni, kodwa inani lamacala abesilisa lingaphansi kwe-1% yenani eliphelele leziguli ezinalesi sifo).