GA18.0

ICD-11 MMS 2026-01

Follicular cyst of ovary

Description

A condition of the ovary, caused by a follicular growth or involution due to failure of ovulation. This condition is characterised by the non-neoplastic formation of closed sac-like structures filled with fluid on or in the ovary and lined by layers of granulosa cells. This condition is commonly asymptomatic, but may also present with pelvic pain, irregular menstrual bleeding, dyspareunia, nausea, vomiting, or urgency to urinate. Confirmation is by imaging.

Index terms

  • Follicular cyst of ovary
  • Cyst of graafian follicle
  • cystic ovarian follicle
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  • follicle cyst
  • follicular cystic ovary disease
  • ovarian follicular cyst
  • Haemorrhagic follicular cyst of ovary
  • haemorrhage of graafian follicle cyst
  • haemorrhagic follicular cyst
  • Rupture of ovarian follicular cyst
  • graafian follicle rupture
  • ovarian follicle rupture
  • ruptured ovarian graafian follicle

Inclusions

  • Cyst of graafian follicle

Exclusions from above levels

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

Sibling codes

  • GA18.1 – Corpus luteum cyst
  • GA18.2 – Theca lutein cyst
  • GA18.4 – Para ovarian cyst
  • GA18.5 – Torsion of ovary, ovarian pedicle or fallopian tube
  • GA18.6 – Other or unspecified ovarian cysts
  • GA18.7 – Acquired atrophy of ovary or fallopian tube
  • GA18.Y – Other specified acquired abnormalities of ovary
  • GA18.Z – Acquired abnormalities of ovary, unspecified

Foundation entity

Follicular cyst of ovary – http://id.who.int/icd/entity/1236221356

Allowed postcoordination axes

Part of: GA18: Acquired abnormalities of ovary › 16: Diseases of the genitourinary system