The extended lateral arm flap: a detailed anatomical study

Area of Science:

• Plastic Surgery
• Microsurgery
• Anatomy

Background:

• The lateral arm flap is a versatile option for reconstructing small to moderate defects in the head, neck, and extremities.
• Its application has been limited by the small size of its skin paddle.
• The flap's vascular supply originates from the posterior radial collateral artery (PRCA).

Observation:

• The posterior radial collateral artery (PRCA) supplies the lateral arm flap.
• Anatomical studies revealed the PRCA's cutaneous blood supply extends further into the forearm.
• This vascular network forms an anastomotic plexus with the interosseous recurrent artery.

Findings:

• The posterior radial collateral artery's blood supply to the skin extends beyond the elbow into the forearm.
• This anatomical finding allows for the design of an "extended" lateral arm flap.
• The extended flap provides a larger skin paddle for reconstructive purposes.

Implications:

• The extended lateral arm flap increases surgical options for head, neck, and extremity reconstruction.
• This technique offers enhanced versatility for microvascular surgeons.
• Further research may explore additional applications of this extended flap design.