What is an extensor tenotomy of the right second toe metatarsophalangeal (MTP) joint?

What is Extensor Tenotomy of the Right 2nd Toe MTP?

Extensor tenotomy of the right second toe MTP is a surgical procedure involving the division (cutting) of the extensor tendon at the metatarsophalangeal joint of the second toe, typically performed to correct toe deformities such as hammer toe or to release contractures causing hyperextension at the MTP joint.

Procedure Overview

An extensor tenotomy is a soft-tissue surgical technique that involves transversely cutting the extensor tendon that runs along the top (dorsal surface) of the toe. According to the IWGDF 2024 guidelines, this is formally defined as "a surgical division of a tendon, in this case a digital flexor tendon" 1, though the term applies to extensor tendons as well.

Anatomical Context

The extensor tendons of the lesser toes (2nd through 5th) pull the toes upward (dorsiflexion). When these tendons become contracted or imbalanced relative to the flexor tendons on the bottom of the toe, deformities develop at the MTP joint.

Clinical Indications

Extensor tenotomy at the MTP joint is performed for:

• Hammer toe deformity correction: When combined with proximal interphalangeal (PIP) joint arthrodesis, a transverse extensor tenotomy and capsulotomy provide exposure and help balance the toe 2

• Hallux extensus (though this involves the great toe): A Z-tenotomy of the extensor hallucis longus combined with dorsal MTP joint release effectively corrects hyperextension deformities 3

• Dorsal contracture of the MTP joint: When the toe is elevated and cannot be brought down to a neutral position, extensor lengthening or tenotomy releases this contracture 2

• Diabetic foot ulcers on lesser toes: In the context of neuropathic plantar or apex ulcers on digits 2-5, surgical offloading interventions including tenotomy may be considered when non-surgical approaches fail 1

Surgical Technique

The procedure typically involves:

1. Longitudinal incision over the MTP joint dorsally (top of toe)
2. Transverse division of the extensor tendon
3. Capsulotomy (opening the joint capsule) to expose the MTP joint
4. Often combined with Z-lengthening of the long extensor tendon for more controlled lengthening 2, 3
5. May require collateral ligament release if angular deformity is present
6. Frequently performed alongside other procedures such as PIP joint fusion or metatarsal osteotomy

Important Clinical Considerations

When Tenotomy Alone is Insufficient

• If there is residual subluxation of the MTP joint after soft-tissue procedures, a metatarsal osteotomy should be considered 2
• For fixed deformities with degenerative bone changes, arthrodesis provides more reliable correction than soft-tissue procedures alone 2
• In diabetic foot ulcers with osteomyelitis or MTP joint infection, metatarsal head resection or joint arthroplasty should be considered rather than simple tenotomy 1

Pitfalls to Avoid

• Vascular compromise: Excessive stretching of the neurovascular bundle during correction can lead to toe ischemia, particularly in severe deformities 2
• Scar contracture: A longitudinal incision can lead to scarring that re-elevates the toe; elliptical incisions may improve cosmesis but restrict exposure 2
• Incomplete correction: Tenotomy addresses only the extensor component; flexor imbalance may require additional procedures such as flexor digitorum brevis tenotomy 2

Expected Outcomes

When performed as part of comprehensive toe deformity correction:

• Patient satisfaction rates: 83-100% 2
• Pain relief: Up to 92% of patients 2
• Return to activity: Typically 6 weeks postoperatively, though swelling may persist longer 2
• Complete correction: Demonstrated in case reports at 8 weeks post-surgery with no recurrence at one-year follow-up 3