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Supplementary Material for: Intralesional corticosteroid administration in the treatment of keloids: a scoping review on injection methods

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posted on 2023-02-07, 07:49 authored by Yin Q., Louter J.M.I., Niessen F.B., Gibbs S., Tasdemir-Kilic G., Lapid O., vanZuijlen P.P.M., Wolkerstorfer A.
Background Intralesional corticosteroid administration (ICA) is a first-line treatment for keloids. However, its clinical results are still highly variable and often suboptimal. Treatment results may strongly be influenced by various operator dependent factors. The aim of this study is to map the details of ICA in keloids described in randomized controlled trials (RCTs), hence presenting the scientific practice of a first-line treatment for keloids in the best available evidence. Summary A systematic search was performed on PubMed, Ovid MEDLINE, Ovid EMBASE and CENTRAL. Eligible studies were RCTs including patients with keloids treated with intralesional corticosteroids. Treatment and study design related data were charted on a predefined form. Thirty-eight RCTs were included for data extraction. Triamcinolone acetonide was used in 37 (97.4%) studies. Dosing per cm2 could only be compared among ten (26%) studies, and varied from 1 to 20 mg. The maximum dose per session varied from 20 to 80 mg. Anesthetics were administered locally and orally in seven and one RCT(s). Treatment intervals varied from weekly to monthly, with four weeks most frequently (50%) used. Needle size was reported in eleven (29%) studies and varied from 26 to 30-gauge. Syringe size was specified in four (11%) studies, being 1 mL. The injection level was described in eleven (29%) studies. Blanching as endpoint was reported in ten (26%) studies. Outcome measures varied widely, from height, surface area or volume, to Vancouver Scar Scale, Patient and Observer Scar Assessment Scale, pain and itch scores, patient satisfaction and different efficacy rates. Only six studies had a follow-up of ≥6 months. Recurrence was identified in two studies with 18 weeks and 1 year of follow-up. Adverse events were reported in 25 (66%) studies. Key messages There is incomplete reporting and substantial heterogeneity in many aspects of ICA and study design among RCTs. This scoping review underscores the urgent need for standardization of treatment protocol and study design to enhance and uniform research conduct among keloid studies.

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