Free functioning gracilis transfer for brachial plexus reconstruction using the internal mammary vessels as recipients: A case report

Adult brachial plexus injuries are often associated with concomitant trauma to the axillary or subclavian vessels. In patients planned for free functioning gracilis transfer (FFGT) this poses a challenge to reconstructive surgeons where using the standard donor vessels can lead to endangering the circulation in the affected extremity or risk flap loss due to the poor perfusion pressures. This case report describes the use of a FFGT for upper limb reconstruction in a 22‐year‐old patient with a pan plexus injury and concomitant axillary artery injury following a high energy motorcycle accident. Ipsilateral internal mammary vessels were used as donor vessels after removing the 3rd and 4th costal cartilages. The gracilis muscle was harvested in its whole length, including a small transverse skin paddle, and transferred to the upper extremity. It was secured to the clavicle proximally, weaved into the Flexor Digitorum Profundus tendons distally and neurotised by the spinal accessory nerve. The procedure and postoperative course were uneventful and the follow up at 18 months showed MRC grade 4 in elbow flexion with only a slight contour deformity at the donor chest site. This is the first report demonstrating the use of internal mammary vessels for FFGT reconstruction in the upper extremity after removing two costal cartilages to achieve sufficient pedicle length.