A combination of bilateral pectoral nerve block and bilateral erector spinae plane block for one-stage Female-to-Male gender affirmation surgery: A report of two cases

•Application of two peripheral nerve blocks procedures in gender affirmation surgery.•Effective postoperative pain management achieved by bilateral PECS and ESP block.•Peripheral nerve blocks reduce postoperative opiod use and allow patient activation.•Early activation of patients reduces the risk of thromboembolism and pneumonia.