Abstract
The authors analyzed the risk factors of punch biopsy by investigating the complications of the technique and their proportions. Patients who underwent punch biopsy in a dermatology clinic between November 2018 and November 2020 (n=1294; mean age, 62.3 years; 540 men and 754 women) were enrolled in the current study. The most common complication was postoperative bleeding (0.9%). Wound infection (0.2%), surrounding skin damage (0.2%), and vagal reflex (0.1%) were also observed. The main risk factors for bleeding following biopsy were location of biopsy site outside of the trunk (odds ratio [OR], 4.60 [95% CI, 2.65-8.00]; p < 0.001) and platelet count lower than 150 000/μL (OR, 2.82 [95% CI, 1.69-4.73]; p < 0.001). When performing a punch biopsy, an adequate explanation of the risks and complications should be provided before obtaining informed consent. Further, blood sampling tests should be performed in advance and the types of cases that may require wound suture should be appropriately determined.
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