GB20.0

ICD-11 MMS 2026-01

Fibrocystic change of breast

Description

A condition characterised by changes to the breast tissue leading to benign, noncancerous lesions in the breast. These conditions may be associated with small or large cyst formation, hyperplasia of the ductal epithelium, apocrine metaplasia of the ductal cells, papillomatosis, duct ectasia, sclerosing adenosis, or fibrosis of the stroma. This condition may also present with breast pain, thickening of breast tissue, or nipple discharge that worsen prior to menstruation, or may be asymptomatic. Confirmation is by clinical breast exam, followed by mammography or ultrasonography to distinguish between abnormal tissue.

Index terms

  • Fibrocystic change of breast
  • Cooper disease
  • Phocas' disease
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  • Schimmelbusch hyperplasia
  • bloodgood disease
  • cystic mastopathy
  • diffuse cystic mastopathy
  • fibrocystic disease of breast
  • Fibrosclerosis of breast
  • Chronic cystic breast
  • chronic cystic disease of breast
  • chronica cystica mastopathy
  • cyst of breast
  • cystic breast
  • cystic disease of breast
  • Chronic mastitis
  • Chronic cystic mastitis
  • cystic mastitis
  • Cystic dysplasia of breast
  • cystic mammary dysplasia
  • Cystic hypertrophy of breast

Exclusions from above levels

  • JB46 – Certain specified disorders of breast or lactation associated with childbirth
  • 01 – Certain infectious or parasitic diseases
  • 05 – Endocrine, nutritional or metabolic diseases
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  • 18 – Complications of pregnancy, childbirth and the puerperium
  • 22 – Injury, poisoning or certain other consequences of external causes

Sibling codes

  • GB20.1 – Fibroadenosis of breast
  • GB20.Y – Other specified benign breast disease
  • GB20.Z – Benign breast disease, unspecified

Foundation entity

Fibrocystic change of breast – http://id.who.int/icd/entity/840006864

Allowed postcoordination axes

Part of: GB20: Benign breast disease › 16: Diseases of the genitourinary system