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Prevalence and Risk Factors for Hypertrophic Scarring of Split Thickness Autograft Donor Sites in a Pediatric Burn Population.

Burns 2019 August
TITLE: Prevalence and Risk Factors for Hypertrophic Scarring of Split Thickness Autograft Donor Sites in a Pediatric Burn Population.

OBJECTIVE: The split-thickness autograft remains a fundamental treatment for burn injuries; however, donor sites may remain hypersensitive, hyperemic, less pliable, and develop hypertrophic scarring. This study sought to assess the long-term scarring of donor sites after pediatric burns.

METHODS: A retrospective review of pediatric burn patients treated at a single institution (2010-2016) was performed. Primary outcomes were prevalence of donor site hypertrophic scarring, scarring time course, and risk factor assessment.

RESULTS: 237 pediatric burn patients were identified. Mean age at burn was 7 yrs., mean %TBSA was 26% with 17% being Full Thickness. Mean follow-up was 2.4 yrs. Hypertrophic scarring was observed in 152 (64%) patients with 81 (34%) patients having persistent hypertrophic scarring through long-term follow-up. Patient-specific risk factors for hypertrophic scarring were Hispanic ethnicity (P=0.03), increased %TBSA (P=0.03), %Full Thickness burn (P=0.02) and total autograft amount (P=0.03). Donor site factors for hypertrophic scarring were longer time to epithelialization (P<0.0001), increased donor site harvest depth (P<0.0001), autografts harvested in the acute burn setting (P=0.008), and thigh donor site location (vs. all other sites; P<0.0001). The scalp, arm, foot, and lower leg donor sites (vs. all other sites) were less likely to develop HTS (P<0.0001, 0.02, 0.005, 0.002, respectively), along with a history of previous donor site harvest (P=0.04).

CONCLUSIONS: Hypertrophic scarring is a prominent burden in donor site wounds of pediatric burn patients. Knowledge of pertinent risk factors can assist with guiding management and expectations.

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