A patient has burns over the anterior trunk and one leg. Using the Rule of Nines, what percentage of TBSA is burned?

Step 1 is: Identify the body regions burned and their respective percentages based on the Rule of Nines. The anterior trunk is 18% of the total body surface area (TBSA). A single leg is 9% of the TBSA. Step 2 is: Add the percentages of the affected body regions. 18% (anterior trunk) + 9% (one leg) = 27%. The total body surface area burned is 27%.