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NCT Number: NCT07022899

Laser and Phenol Treatment for Pilonidal Sinus

This study compares three different treatments for pilonidal sinus disease to determine which approach provides the best outcomes for patients.

Pilonidal sinus is a condition where a small hole or tunnel forms in the skin at the top of the buttocks. It happens when hair gets trapped under the skin, causing pain, swelling, and infection. This condition mainly affects young adults and can interfere with work and daily activities.

The study compares three minimally invasive treatments:

1. Laser therapy alone: A thin laser fiber is inserted into the sinus to destroy the lining and close the tunnel using local anesthesia as an outpatient procedure. 2. Phenol treatment alone: A chemical solution (phenol) is injected into the sinus to make it close and heal, done with local anesthesia in the clinic. 3. Combined laser and phenol therapy: Both treatments are used together for potentially better healing with lower recurrence rates.

Researchers will measure healing rates, healing time, recurrence rates, pain levels, complications, patient satisfaction, and return to normal activities.

This research is important because there is no single "best" treatment for pilonidal sinus. Traditional surgery often requires general anesthesia, hospital stays, large wounds taking months to heal, significant scarring, long work absence, and high recurrence rates up to 30%.

These newer treatments offer faster healing, less pain and scarring, quicker return to normal life, and lower recurrence chance. By comparing these approaches directly, this study will help doctors and patients make better treatment decisions based on scientific evidence.

This is a prospective observational cohort study following patients who receive one of these three treatments. The study will include adults with pilonidal sinus disease suitable for minimally invasive treatment.

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This study is active but is not currently recruiting participants.

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Key information

Conditions

Pilonidal Sinus Treatment

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Sancaktepe Sehit Prof. Dr. Ilhan Varank Training and Research Hospital

Istanbul, 34785, Turkey (Türkiye)

About this study

Detailed Description şu şekilde olmalı (sample size dahil):

STUDY DESIGN AND METHODOLOGY

This prospective observational cohort study will be conducted at Sancaktepe Şehit Prof. Dr. İlhan Varank Training and Research Hospital, Department of General Surgery. The study aims to compare the clinical outcomes of three different minimally invasive treatment approaches for pilonidal sinus disease.

TREATMENT GROUPS

Group 1 - Laser Therapy: Patients will receive diode laser treatment using a radial fiber inserted into the pilonidal sinus tract. The procedure is performed under local anesthesia with lidocaine injection.

Group 2 - Phenol Treatment: Patients will receive crystallized phenol application into the sinus cavity after debridement of hair and debris. The procedure is performed under local anesthesia.

Group 3 - Combined Treatment: Patients will receive both laser therapy followed by phenol application in the same session under local anesthesia.

SAMPLE SIZE

This is a pilot comparative study designed to evaluate the feasibility and preliminary efficacy of three treatment approaches. Sample size will be determined based on patient availability and recruitment capacity during the study period. All eligible patients meeting inclusion criteria will be enrolled consecutively.

FOLLOW-UP SCHEDULE

Patients will be evaluated at 1 week, 1 month, 3 months, 6 months, and 12 months post-treatment.

PRIMARY ENDPOINTS

  • Complete healing rate (absence of discharge, pain, and complete epithelialization)
  • Recurrence rate at 12 months

SECONDARY ENDPOINTS

  • Time to complete healing
  • Post-operative pain scores (VAS)
  • Complication rates
  • Patient satisfaction scores
  • Return to normal activities
  • Quality of life assessment

STATISTICAL ANALYSIS

Categorical variables will be analyzed using Chi-square test. Continuous variables will be analyzed using appropriate parametric or non-parametric tests. Kaplan-Meier survival analysis will be used for time-to-healing assessment.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Age 18 years and older
  • Diagnosed chronic pilonidal sinus disease confirmed by clinical examination
  • Suitable for minimally invasive treatment approaches
  • Ability to provide informed consent
  • Willingness to comply with follow-up schedule
  • No contraindications to local anesthesia

Exclusion criteria

  • Active acute pilonidal abscess requiring emergency drainage
  • Previous pilonidal sinus surgery or treatment
  • Pregnancy or breastfeeding
  • Immunocompromised patients (diabetes mellitus, immunosuppressive therapy, chronic corticosteroid use)
  • Malignancy in the sacrococcygeal region
  • Bleeding disorders or anticoagulant therapy that cannot be discontinued
  • Allergy to local anesthetics (lidocaine)
  • Mental incapacity or psychiatric illness preventing informed consent
  • Geographic inaccessibility for follow-up visits

Treatment and study plan

Primary outcomes

  1. Complete Healing Rate

    Time frame: 6 months

    Complete Healing Rate

  2. Recurrence Rate

    Time frame: 12 months

    Percentage of patients experiencing recurrence of pilonidal sinus disease defined as reappearance of symptoms, discharge, or new sinus formation at the treatment site

Secondary outcomes

  1. Time to Complete Healing

    Time frame: Up to 12 months

    Time in weeks from treatment to complete healing

  2. Post-operative Pain Score

    Time frame: 1 week, 1 month, 3 months

    Pain intensity measured using Visual Analog Scale (VAS) ranging from 0-10

  3. Complication Rate

    Time frame: 12 months

    Percentage of patients experiencing treatment-related complications

Sponsors and collaborators

Lead sponsor

Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital

Other

Registry information

Official study title

Laser and Phenol Treatment for Pilonidal Sinus: Outcomes of Monotherapy and Combined Approach

Important dates

Study start
2025
Primary completion
2025
Study completion
2026
First posted
Jun 15, 2025
Registry last updated
Jun 15, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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