Abstract
The keystone design perforator island flap is a trapezoidal-shaped random perforator island flap with many advantages over primary closure, skin grafting, and other local flaps for soft tissue reconstruction commonly encountered with cancer excisions. This case series of 39 keystone flaps in 37 patients reviews the practical design, use, and applications of the flap while highlighting certain important considerations. Keystone flaps were designed as in the original description, with a minor modification in the lower extremity where a higher flap to defect width ratio was used. Defects varying in size from 6 to 63 cm2 were reconstructed in 23 males and 14 females ranging in age from 49 to 89. In all 39 cases, there were 2 minor complications of partial flap dehiscence and no major complications such as partial or complete flap loss. The keystone flap is a versatile and reliable flap with applications almost anywhere on the body. A higher ratio of flap width to defect width up to 1:3 is more appropriate for the lower extremity where tension is higher.
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