Metatarsal Transfer: A Key Technique in Microsurgical Reconstruction

Metatarsal transfer is a specialized microsurgical procedure used to reconstruct bone defects in the hand, particularly following traumatic injuries. This technique involves harvesting a metatarsal bone from the foot and transferring it to the upper extremity to restore skeletal integrity and function. It is often employed when conventional reconstruction methods are insufficient due to extensive tissue loss or complex defects.

The procedure is typically performed as a nonvascularized bone graft, meaning the transferred metatarsal does not retain its original blood supply and relies on the recipient site for revascularization. Despite this, metatarsal transfer has proven effective in specific clinical scenarios, especially when combined with soft tissue coverage such as a fasciocutaneous radial forearm flap to ensure adequate wound healing and protection of the graft.

One documented case involved a 35-year-old female patient who sustained a high-energy forefoot injury in a vehicular accident, resulting in an exposed fracture with bone and dermal loss affecting the second toe and third metatarsal. Surgeons performed a second toe resection and transferred the second metatarsal to augment the diaphysis of the third metatarsal ray. This nonvascularized metatarsal transfer was paired with a microsurgical forearm flap to provide soft tissue coverage. The reconstruction achieved functional restoration of the forefoot, demonstrating the viability of metatarsal transfer as a reconstructive option for segmental defects.

Beyond forefoot reconstruction, metatarsal transfer is also utilized in upper limb rehabilitation. In hand surgery, microsurgical transfer of metatarsals from the foot serves as an alternative donor site for vascularized bone grafting, particularly in cases of mutilated hand injuries where traditional donor sites may be compromised. This approach allows surgeons to harvest bone with minimal morbidity at the donor site while providing structural support for thumb or finger reconstruction.

The technique is especially valuable in thumb reconstruction, where maintaining adequate length and stability is critical for opposition and grip function. Double microsurgical toe transfers—sometimes incorporating metatarsal elements—have been used to create a functional thumb without sacrificing another finger, thereby preserving overall hand dexterity. By transposing tissue from the second toe to the great toe or using metatarsal bone as a structural strut, surgeons can achieve both bony and soft tissue restoration in a single staged procedure.

Clinical outcomes indicate that when metatarsal transfer is performed with meticulous soft tissue planning—including adequate coverage and preservation of key anatomical landmarks like the first web space—patients can regain significant functional use of the reconstructed limb. The success of the procedure depends on careful patient selection, precise surgical execution, and postoperative rehabilitation.

As reconstructive microsurgery advances, metatarsal transfer remains a valuable tool in the surgeon’s arsenal, particularly for complex defects requiring both bony and soft tissue restoration. Its application underscores the importance of utilizing autologous tissue from the foot to achieve durable, biologically compatible reconstructions in both lower and upper extremity trauma.

Key Takeaways

• Metatarsal transfer is a microsurgical technique used to reconstruct bone defects in the hand or foot using autologous bone from the foot.
• It is often performed as a nonvascularized graft and requires reliable soft tissue coverage, such as a radial forearm flap, for success.
• The procedure has been successfully used in traumatic forefoot reconstructions and mutilated hand injuries.
• In hand surgery, metatarsal transfer supports thumb and finger reconstruction while minimizing donor site morbidity.
• Optimal outcomes depend on proper soft tissue planning, including maintenance of the first web space and adequate flap coverage.
• Metatarsal transfer represents a vital “non-toe” option in microsurgical reconstruction from the foot, expanding the range of available donor tissues.

Frequently Asked Questions

What is metatarsal transfer used for?

Metatarsal transfer is primarily used to reconstruct segmental bone defects in the hand or foot following trauma, infection, or tumor resection. It provides structural support when autologous bone grafting is needed and other donor sites are unsuitable.

Is metatarsal transfer a vascularized procedure?

In most clinical applications, metatarsal transfer is performed as a nonvascularized bone graft. The bone relies on the recipient site’s blood supply for healing and integration. However, variations exist where vascularized pedicles are preserved depending on the surgical goal and anatomical constraints.

What are the advantages of using metatarsal bone for transfer?

The metatarsal offers a strong, straight bone graft with minimal soft tissue attachment, making it easy to harvest and shape. Donor site morbidity is low, especially when only a portion of the bone is taken, and the foot retains functional stability postoperatively.

Can metatarsal transfer be used in thumb reconstruction?

Yes, metatarsal transfer is frequently used in thumb reconstruction, either as a structural strut or in combination with toe transfers to provide both length and stability. This approach helps preserve finger length while achieving a functional thumb.

What role does soft tissue play in metatarsal transfer success?

Adequate soft tissue coverage is critical to protect the transferred bone, prevent infection, and promote healing. Flaps such as the radial forearm fasciocutaneous flap are commonly used to provide reliable coverage, especially in exposed or contaminated wounds.