Breast disease

Breast diseases can be classified either with disorders of the integuement, or disorders of the reproductive system.

Cancer
A majority of breast diseases are noncancerous.

Infections and inflammations
These may be caused among others by trauma, secretory stasis/milk engorgement, hormonal stimulation, infections or autoimmune reactions. Repeated occurrence unrelated to lactation requires endocrinological examination.

Pre-malignant diseases

 * Carcinoma in situ, a pre-malignant condition which can progress to a malignant cancer

Malignant diseases
Malignant diseases include:
 * Breast cancer
 * Paget’s disease of the nipple, also known as Paget’s disease of the breast

Benign conditions
Benign conditions include:
 * Congenital disorders
 * inverted nipple
 * supernumerary nipples/supernumerary breasts (polymazia / polymastia) /duplicated nipples
 * Aberrations of normal development and involution
 * cyclical nodularity
 * breast cysts
 * fibroadenoma - benign tumor
 * gynecomastia (males)
 * nipple discharge, galactorrhea
 * mammary fistula
 * Fibrocystic disease / Fibrocystic changes
 * cysts
 * epithelial hyperplasia
 * epithelial metaplasia
 * papillomas
 * adenosis
 * Pregnancy-related
 * galactocoele

Fibrocystic Breast Condition
Also called: fibrocystic breast disease, Chronic cystic mastitis, Diffuse cystic mastopathy, Mammary dysplasia

Abnormal nipples
Nipples

Inverted nipples
Inverted nipple

Mastitis

 * bacterial mastitis
 * mastitis from milk engorgement or secretory stasis
 * mastitis of mumps
 * chronic intramammary abscess
 * chronic subareolar abscess
 * tuberculosis of the breast
 * syphilis of the breast
 * retromammary abscess
 * actinomycosis of the breast
 * Mondor’s disease
 * duct ectasia syndrome
 * breast engorgement