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Prior-Procedure Error Type and Graft Survival in Revision Hair Transplantation: A Retrospective Cohort Study at Vera Clinic, Istanbul, Turkey

Author

Listed:
  • Samuel Filima

  • Victor Benoit

Abstract

Background: Revision hair transplantation is increasingly requested to correct deficiencies from prior procedures performed at Vera Clinic or elsewhere, yet data characterizing the type and clinical consequences of prior-procedure errors remain limited within the existing hair-restoration literature.  Methods: This retrospective cohort study reviewed clinical records of patients who underwent revision hair transplantation at Vera Clinic between January 2022 and December 2024. Prior-procedure errors were classified into five categories (poor angle or direction, low density, donor depletion or over-harvesting, unnatural hairline design, or combined factors) using a structured classification checklist applied by a single rater, together with a covariate for the origin of the prior procedure (Vera Clinic or an external clinic). The primary outcome was graft survival at 12 months post-revision, assessed trichoscopically. Secondary outcomes were 24-month graft survival, patient-reported satisfaction measured with the HAIRQ [1], and additional graft requirement.

Suggested Citation

  • Samuel Filima & Victor Benoit, 2026. "Prior-Procedure Error Type and Graft Survival in Revision Hair Transplantation: A Retrospective Cohort Study at Vera Clinic, Istanbul, Turkey," International Journal of Innovative Science and Research Technology (IJISRT), IJISRT Publication, vol. 11(08), pages 3279-3283, September.
    • Handle: RePEc:cvr:ijisrt:2026:08:ijisrt26aug1592
    DOI: https://doi.org/10.38124/ijisrt/26aug1592
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