Efficacy of crystallized and liquid form phenol application in pilonidal sinus disease: a single-center retrospective study.

Aim and objective: Pilonidal sinus is a frequently observed disease in young adult male patients. Although its treatment is traditionally surgical, the tendency to use minimally invasive interventions has increased over time. This study aims to compare the clinical results of the non-surgical treatment methods for pilonidal sinus: crystallized and liquid phenol applications.

Materials and methods: We retrospectively analyzed the data of 102 patients treated with phenol application in the General Surgery Clinic of our hospital between July 2017 and July 2019. Eighty patients were included in the study: 40 treated with crystallized phenol and 40 with liquid phenol. In the 1st month following the application, the recovery rates, complication rates, persistence of complaints, and recurrence at the end of the 1st year were compared between the groups.

Results: The mean age was 25.60 ± 7.16 and 25.78 ± 7.83 years in the crystallized (group 1) and liquid phenol group (group 2), respectively. Complications observed up to the 3rd week of follow-up were considered early complications, while those observed after the 3rd week were considered late complications. Early complications were observed in 15% and 37.5% of patients in groups 1 and 2, respectively (p = 0.042). Early complications were significantly higher in the liquid phenol group compared to the crystallized phenol group. At the end of the 1st year, 90% improvement was detected in group 1 and 95% in group 2. However, there was no significant difference between the recovery and recurrence rates between the groups.

Conclusion: In pilonidal sinus treatment, successful results are obtained with both crystallized and liquid phenol application. Both methods can be performed safely and easily as an alternative treatment method to surgery.