Extensor Tendon Injuries of the Foot and Ankle: Lacerations, Diagnosis, and Surgical Repair

Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Township, MI. Last updated April 2026.

Extensor tendon lacerations of the dorsal foot — injuries to the extensor digitorum longus (EDL), extensor hallucis longus (EHL), extensor digitorum brevis (EDB), or peroneus tertius tendons — result most commonly from lacerations (glass, machinery, lawn mower) or crush injuries to the dorsal foot. While extensor tendon injuries of the foot are less commonly discussed than flexor tendon injuries of the hand, they produce significant functional impairment if missed or inadequately repaired — the inability to dorsiflex the toes or ankle produces a foot drop pattern that impairs normal gait.

Anatomy and Clinical Assessment

Extensor tendon anatomy: EHL — the primary dorsiflexor of the hallux; resides between EDB and the medial neurovascular bundle (dorsalis pedis artery); isolated EHL laceration produces hallux drop deformity and inability to extend the great toe against resistance. EDL — four slips extending to the lesser toes; laceration of individual slips produces toe drop of the affected digit; all four tendons are enclosed in a single synovial sheath beneath the inferior extensor retinaculum. EDB — originates on the calcaneus and inserts into the base of the proximal phalanges of the four medial toes; an accessory muscle (extensor digitorum brevis manus equivalent) — its loss is less functionally significant than EDL or EHL. Clinical assessment: active dorsiflexion of the affected toe against resistance; partial lacerations (>50% of tendon width) may retain active motion but will rupture with subsequent exertion — partial lacerations require repair. Neurovascular examination: the deep peroneal nerve and dorsalis pedis artery are in proximity to the EHL and EDL — always document sensation in the first web space (deep peroneal nerve distribution).

Treatment

Primary repair: indicated for all complete and partial (>50%) extensor tendon lacerations — performed within 7–10 days of injury for best outcomes; modified Kessler or Bunnell suture technique with 3-0 or 4-0 non-absorbable suture; epitendinous suture for smooth gliding surface. Post-repair immobilization: short leg cast or boot in slight dorsiflexion for 4–6 weeks; protected range of motion at 4 weeks; return to full activity at 10–12 weeks. Late presentation (>3–4 weeks): adhesions and tendon retraction complicate repair — may require tendon grafting or tendon transfer; EHL reconstruction with EDB transfer or palmaris longus graft. Dr. Biernacki at Balance Foot & Ankle evaluates and repairs extensor tendon lacerations and injuries of the foot and ankle. Call (810) 206-1402 at our Bloomfield Township or Howell office for urgent evaluation.

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In-Office Treatment at Balance Foot & Ankle

If home care isn’t resolving your your foot or ankle concern, a visit with a board-certified podiatrist is the fastest path to accurate diagnosis and a personalized plan. At Balance Foot & Ankle Specialists, Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin offer same-day and next-day appointments at both our Howell and Bloomfield Township offices. We perform on-site diagnostic ultrasound, digital X-ray, conservative care, advanced regenerative treatments, and minimally invasive surgery when indicated.

Call (810) 206-1402 or request an appointment online. Most insurance plans accepted, including Medicare, Blue Cross Blue Shield, Aetna, Cigna, and United Healthcare.

Frequently Asked Questions

How do I know if I sprained or broke my ankle?

Both cause pain, swelling, and difficulty walking. Key differences: fractures often cause more immediate severe pain, tenderness directly over bone (not just ligament), and inability to bear any weight. X-rays and the Ottawa Ankle Rules help determine if imaging is needed.

How long does an ankle sprain take to heal?

Grade I (mild): 1–2 weeks. Grade II (moderate): 3–6 weeks. Grade III (complete tear): 2–3 months. Chronic instability from improperly treated sprains can persist and may require surgery.

What is the best treatment for a sprained ankle?

RICE protocol (Rest, Ice, Compression, Elevation) for the first 48–72 hours, followed by protected weight-bearing as tolerated. Physical therapy rehabilitation is critical for high-grade sprains to restore strength and proprioception and prevent chronic instability.

Need Treatment at Balance Foot & Ankle?

Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin see patients at our Howell and Bloomfield Township offices.

Book Online or call (810) 206-1402

Most Common Mistake We See

The most common mistake we see is: Waiting too long before seeking care. Fix: any foot pain lasting more than 4 weeks, or any sudden severe symptom, deserves a professional evaluation rather than more rest.

Warning Signs That Need Same-Day Care

Frequently Asked Questions

When should I see a podiatrist?

If symptoms persist past 2 weeks, affect your normal activity, or are accompanied by red-flag symptoms (warmth, redness, swelling, inability to bear weight).

What does treatment cost?

Most diagnostic visits and conservative treatments are covered by Medicare and major insurers. Out-of-pocket costs vary by your specific plan.

How quickly can I get an appointment?

Most non-urgent cases see us within 5 business days. Urgent cases (sudden pain, possible fracture) typically same or next business day.

Related Care at Balance Foot & Ankle

Clinical ankle services at our Howell and Bloomfield Township offices.

Ankle Sprain & InstabilityFoot BracingAnkle Arthroscopy