Additional history from the family revealed that they were cleaning the wound with copious amounts of hydrogen peroxide twice a week—a practice that impedes wound healing and was ultimately the cause of this patient’s wound closure delay.
A nonhealing wound should be carefully evaluated to rule out malignancy, infection, or an inflammatory disorder such as pyoderma gangrenosum (PG). In this case, punch biopsies were performed to exclude PG and malignancy, particularly squamous cell carcinoma. Additionally, punch biopsies were performed for bacterial and fungal tissue culture. A complete blood count with differential was obtained to evaluate for signs of infection or hematologic malignancy. All work-ups and biopsies were consistent with a noninfected surgical wound.
Widely available over the counter in 3% to 5% solutions, hydrogen peroxide is used as a low-cost antiseptic for minor cuts and wounds. Data are mixed as to whether hydrogen peroxide improves or impedes wound healing when used outside of initial first aid or postoperatively.1 At higher concentrations, it uniformly causes skin necrosis. Owing to its debriding effect, it is FDA approved to treat seborrheic keratoses as an alternative to cryotherapy or electrodessication and curettage.
At the time of this work-up, and in the absence of other signs of infection, the patient and family were told to stop using hydrogen peroxide. Care instructions were changed to daily topical petroleum jelly and wound occlusion. Four weeks after wound care changes were made, the wound had re-epithelialized completely and reduced in size by two-thirds.
Text courtesy of Jonathan Karnes, MD, medical director, MDFMR Dermatology Services, Augusta, ME. Photos courtesy of Jonathan Karnes, MD (copyright retained).