The purpose of this study was to review our success rate performing the histrelin implant procedure in clinic without sedation.
A retrospective study was performed for histrelin implant procedures done at our institution from 2008 to 2020. Wilcoxon rank-sum test or Fisher’s exact test was utilized to identify significant differences (p<0.05).
A total of 73 patients underwent 184 histrelin implant procedures from 2008 to 2020. In the past few years, there has been a decrease in procedures for precocious puberty and an increase for gender dysphoria. The majority of procedures were performed in clinic without sedation (82%). The only risk factor associated with requiring sedation was younger age (median 9 vs. 10 years; p<0.003). Complications (i.e. implant fracture or need for counter-incision) were noted in 10 of the procedures (5%). The only risk factor identified for a procedural complication during implant removal/replacement was interval time from insertion (21 vs. 13 months; p<0.01). The only documented wound problem reported was dermatitis in 1 patient (no suture granuloma, dehiscence, or implant extravasation).
Procedural refinements and distraction therapy have enabled us to perform the majority of procedures in clinic without sedation. In our experience, procedural difficulty and complications appear to increase with prolonged implant duration. Histrelin implantation is increasingly being performed for gender dysphoria.

© 2021 Walter de Gruyter GmbH, Berlin/Boston.

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