GA13.1

ICD-11 MMS 2026-01

Low grade squamous intraepithelial lesion of vulva

Description

A condition of the vulva, characterised by lesion of the squamous vulvar intraepithelial cells, leading to unspecified grade or severity of dysplasia and varying degrees of atypia of the cells. This condition is associated with smoking and immunosuppression, or conditions such as human papillomavirus, chronic vulvar irritation, or herpes simplex virus type 2. Confirmation is by tissue biopsy.

Index terms

  • Low grade squamous intraepithelial lesion of vulva
  • LSIL – [low grade squamous intraepithelial lesion of vulva]
  • VIN I- [vulvar intraepithelial neoplasia grade I]
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  • VIN [vulvar intraepithelial neoplasia] NOS
  • dysplasia of vulva NOS
  • epithelial hyperplasia of labia (deprecated)
  • epithelial hyperplasia of vulva
  • intraepithelial neoplasia of vulva NOS
  • mild vulvar dysplasia

Excludes

  • 1A95.1 – Genital warts of vulva
  • 2C70.2 – Squamous cell carcinoma of vulva
  • 2E67.12 – Vulvar intraepithelial neoplasia, HPV-independent
  • 2E67.13 – High grade squamous intraepithelial lesion of vulva, HPV-associated

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

  • GA13.0 – Polyp of vulva
  • GA13.2 – Hypertrophy of vulva
  • GA13.3 – Vulvar cyst
  • GA13.4 – Labial agglutination
  • GA13.5 – Skene duct cyst
  • GA13.6 – Vulvar laceration
  • GA13.7 – Vulvar haematoma
  • GA13.Y – Other specified acquired abnormalities of vulva or perineum
  • GA13.Z – Acquired abnormalities of vulva or perineum, unspecified

Foundation entity

Low grade squamous intraepithelial lesion of vulva – http://id.who.int/icd/entity/748678746

Allowed postcoordination axes

Part of: GA13: Acquired abnormalities of vulva or perineum › 16: Diseases of the genitourinary system