Comparison of topically applied 0.2% glyceryl trinitrate ointment, incision and excision in the treatment of perianal thrombosis

Background and aims. Topically applied 0.2% glyceryl trinitrate ointment to the anal region, incision and excision were compared in the treatment of perianal thrombosis, in order to establish which method is the best in terms of pain relief, number of recurrences and the appearance of anal skin tags. Patients and methods. A total of 150 patients were randomly divided into three groups of 50, each group being treated by one of the above-mentioned methods. The results of the treatment were evaluated during the first 4 days, after one month and after one year. Results, A statistically significant reduction of pain was achieved by excision if compared with incision or conservative treatment with glyceryl trinitrate (p <0.001), and by conservative treatment with glyceryl trinitrate if compared with incision (p <0.01) on the 4th day of follow-up. Comparison of patients treated by the three different methods did not reveal any significant difference between these methods after one month (p <0.05). After one year the number of recurrences was significantly reduced after excision if compared with incision (p <0.05) or conservative treatment with glyceryl trinitrate (p <0.05). The number of patients without symptoms was significantly greater after excision if compared with,incision or conservative treatment with glyceryl trinitrate (p <0.001). The number of patients with anal skin tags was significantly reduced in patients treated by excision if compared with incision (p <0.001) or glyceryl trinitrate treatment (p <0.001). Conclusion. Excision is a significantly better method of treatment of perianal thrombosis than incision or topically applied 0.2% glyceryl trinitrate ointment.