True about breast cyst is all except

Breast cyst are cavities lined by epithelium in the breast containing fluid. It arises from destruction and dilatation of breast lobule and terminal ductules. It is due to nonintegrated stromal and epithelial involution. Incidence is very high (1 in 14 females). It is common after the age of 35 years up to menopause. It is uncommon after menopause. Hormone replacement can cause cyst formation in old women. Cyst size varies with menstruation due to influence of ovarian hormones. Cyst can be recurrent and often multiple (50%) It can&;t be subside itsown Treatment. :Aspiration for two times. Surgical excision is done if cyst recurs after two aspirations or if there is bloody discharge or residual mass if felt after aspiration. Ref; (page no;526 ) 5th edition of SRB&;S manual of Surgery.