<bold>The aim of the study</bold> was to evaluate result of non-surgical treatment among adolesecent and adult cases.
<bold>Material and methods.</bold> This study was carried out on cases with umbilical pilonidal disease who refused surgical treatment as first line treatment. Duration of study was from 2003 to 2006. If a patient due to complication required surgery, was not excluded from study. Data was analyzed by SPSS ver 13.0 (Chicago, IL, USA).
<bold>Results.</bold> In this study, 51 cases were included. Mean ± SD in male was 23.57±6.11 (range 16-40) and female was 27.93±11.38 (range 15-60). Patients were divided in two groups. Group 1 included cases ≤25 yrs and consisted of 32 cases. Cases >25 yrs were placed in group 2 (19 cases). From 51 cases included in this study, 43 of them were appropriate for non-surgical treatment. Eight cases underwent surgical treatment. Of 51 cases, 35 cases (68.6%) were male and 31.4% were female. Of 43 cases who treated conservatively, 29 (67.44%) cases were male and 14 (32.56%) were female. There was no significant difference between rate of successful conservative treatment among cases >25 yrs and cases ≤25 yrs. There was no significant different between different duration of manifestation.
<bold>Conclusion.</bold> In this study we found successful non-surgical treatment in 90.6% of cases ≤25 yrs and 73.7% of cases >2 yrs. Non-surgical treatment may be appropriate option in uncomplicated cases. Another study is recommended to confirm this method of treatment.