Chemical Peeling Therapy Using Phenol for the Cervico-Vaginal Intraepithelial Neoplasia

Area of Science:

• Gynecology
• Oncology
• Dermatology

Background:

• Cervical and vaginal intraepithelial neoplasia (CIN and VaIN) are precancerous conditions often treated surgically.
• Surgical treatments for CIN and VaIN can lead to obstetric complications.
• Alternative therapies are needed to effectively treat CIN and VaIN while minimizing risks.

Purpose of the Study:

• To validate liquid phenol-based chemical peeling therapy for CIN and VaIN.
• To assess the safety and efficacy of this therapy, particularly regarding obstetric outcomes.
• To identify factors associated with resistance to phenol-based therapy.

Main Methods:

• A study involving 483 women diagnosed with CIN, VaIN, or both.
• Participants received phenol-based chemical peeling therapy every 4 weeks until disease clearance, confirmed by Pap tests or colposcopy.
• Comparison of recurrence and persistence rates with untreated patients; HPV genotyping was performed.

Main Results:

• Phenol-based therapy resulted in <2% persistent CIN, compared to 18-88% in untreated patients.
• No obstetric complications were reported in 98 pregnancies post-therapy.
• Factors linked to treatment resistance included immune suppression, age 35-39, higher-grade lesions, and multiple HPV types.

Conclusions:

• Phenol-based therapy is a safe and effective treatment for CIN and VaIN.
• Suitable candidates include women <35 with CIN1/CIN2 and single HPV type, though multiple sessions may be needed.
• The therapy avoids obstetric complications associated with surgical interventions.