Table II. Feasibility criteria of ARU in fibula free flap.

1)	The maximum width of the ARU must not exceed 25% of the total of the leg circumference
2)	The length of the harvested cutaneous rectangular area must not exceed one third of the total length of the surgical defect
3)	The area of the harvested skin graft must be an isoscele triangle with the base adjacent to the proximal and distal sides of the rectangular area, and with equal width
4)	The length of every triangle must be equal to the length of the rectangular area