Determination of the optimal frequency of injection of triamcinolone: monitoring change in volume of keloid lesions following injection of 40 mg of triamcinolone

Mean pretreatment volume was 6.4 ml. Following triamcinolone injection, mean lesion volume became 5.1, 3.7, 3.6, and 3.6 ml at 1, 2, 3, and 4 weeks postinjection, respectively. The mean lesion volume was 3.7 and 3.9 ml at 5 and 6 weeks postinjection. Mean lesion volume was 1.29 ml lower at 1 week than at pretreatment stage (SD ± 0.8797), 1.35 ml lower in volume at 2 weeks than 1 week (SD ± 1.0386), and 0.138 ml lower in volume at 3 weeks than 2 weeks (SD ± 0.159). Mean lesion volume was 0.0250 ml lower at 4 weeks than at 3 weeks (SD ± 0.3215), 0.1000 ml greater in volume at 5 weeks than 4 weeks (SD ± 0.1713), and 0.2000 ml greater in volume at 3 weeks than 2 weeks (SD ± 0.0418). There is a statistically significant difference between the mean volume at 1 week postinjection and that at pretreatment stage, between 2 and 1 week, and between 3 and 2 weeks (p ≤ 0.05). Reduction in volume was found to be most profound and statistically significant within the first 2 weeks postinjection.