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Vulvar Intraepithelial Neoplasia (VIN)

A precancerous lesion of the vulva, a precursor to vulvar squamous cell carcinoma.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

References (5)

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Kadın Hastalıkları ve Doğum department. Book Appointment →

What is Vulvar Intraepithelial Neoplasia (VIN)?

Vulvar intraepithelial neoplasia (VIN) is a precancerous lesion limited to the squamous epithelium of the vulva. The 2015 ISSVD classification divides VIN into two main types: HPV-related VIN (formerly VIN 2/3 - now uVIN or vulvar HSIL - high-grade squamous intraepithelial lesion, in young women, multifocal) and HPV-unrelated VIN (dVIN - differentiated VIN, in older women, often associated with lichen sclerosus, more aggressive).

uVIN/HSIL etiology: high-risk HPV types (HPV 16 most common, 18, 33), young women (30-40 years), smoking, immunosuppression, multiple sexual partners. Often multifocal (multiple lesions on vulva, perianal area, vagina, cervix). dVIN: in postmenopausal women (60-80 years), strong association with lichen sclerosus (60-80%), keratinizing pattern, p53 mutations, very rapid progression to invasive cancer (within 1-7 years, 30-80% risk).

Diagnosis: vulvar examination with magnifying glass, vulvoscopy (5% acetic acid), targeted biopsy (multifocal mapping), HPV test, immunohistochemistry (p16+ uVIN, p53+ dVIN). Treatment: wide local excision (gold standard - dVIN priority), laser ablation (uVIN), topical imiquimod 5% (uVIN), 5-fluorouracil (selected). Treatment of underlying lichen sclerosus is critical (high-potency steroid). Recurrence is common (40-60%), lifelong follow-up is mandatory.

Symptoms

Persistent vulvar itching (may be only finding for years)
Vulvar burning, pain, soreness
Skin color change: white, red, brown, multicolored
Raised, thickened, plaque-like lesions
Erosion, ulceration, fissure
Bleeding (advanced lesions)
Difficulty urinating, dysuria
Dyspareunia (painful intercourse)
Vulvar lump or asymmetry

Risk Factors

uVIN: high-risk HPV infection (HPV 16, 18)
uVIN: young age (30-40), smoking, multiple sexual partners
uVIN: cervical/anal HSIL history, immunosuppression
dVIN: lichen sclerosus (60-80% association)
dVIN: postmenopausal age (60-80)
dVIN: lichen planus, chronic vulvar dermatosis
Solid organ transplantation (immunosuppression)
HIV positivity
Cigarette smoking
DES exposure

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Persistent vulvar itching for more than 4-6 weeks
  • Color change, white-red plaque on vulva
  • Thickened, raised lesion
  • Vulvar bleeding or erosion
  • Lichen sclerosus diagnosis + new lesion
  • Suspicious appearance on vulva, asymmetry
  • Dyspareunia, vulvar pain
  • Postmenopausal vulvar mass or lesion

Treatment Methods

01
Vulvar examination + vulvoscopy (5% acetic acid)
02
Targeted multifocal biopsy (gold standard - mapping)
03
HPV test, p16/p53 immunohistochemistry
04
uVIN/HSIL options:
05
- Wide local excision (gold standard)
06
- CO2 laser ablation (multifocal small lesion)
07
- Topical imiquimod 5% cream (3×/week 16 weeks)
08
- 5-fluorouracil (selected)
09
dVIN treatment:
10
- Wide local excision (priority - high cancer risk)
11
- Skinning vulvectomy (multifocal, large lesion)
12
- High-potency topical steroid (lichen sclerosus background)
13
Smoking cessation
14
Skin biopsy of accompanying lichen sclerosus
15
Pap smear, anal cytology (multifocal screening)
16
Lifelong follow-up: every 6 months for first 2 years, then annual
17
HPV vaccine (cross-protection in young patients)
18
Genetic counseling (familial syndromes)

Which Department to Visit?

You can visit our Kadın Hastalıkları ve Doğum department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

Learn About Kadın Hastalıkları ve Doğum Department

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.