Ankle Tenoscopy: Minimally Invasive Evaluation and Treatment of Ankle Tendons

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

Tenoscopy — arthroscopic evaluation of tendon sheaths around the ankle — provides minimally invasive access to the posterior tibial tendon, peroneal tendons, and flexor hallucis longus tendon sheaths for diagnosis and treatment of pathology that is incompletely accessible through standard open approaches. As ankle arthroscopy technology has miniaturized, tenoscopy has become an increasingly valuable technique for treating tendon pathology while minimizing soft tissue disruption.

Posterior Tibial Tendon Tenoscopy

Posterior tibial tendon tenoscopy provides direct visualization of the tendon from the medial malleolus to the navicular insertion — the region most commonly affected by PTTD (posterior tibial tendon dysfunction). Longitudinal split tears and areas of tendinosis that appear normal on MRI are directly visualized and debrided. Adhesions and impinging synovitis are released under direct visualization with smaller incisions and faster recovery than open synovectomy. A 2.7mm arthroscope is typically used; 2 or 3 portals are placed along the tendon course. Tenoscopic debridement is most appropriate for Stage I PTTD (tenosynovitis without tendon degeneration or flatfoot deformity) — patients who have failed conservative management with bracing and physical therapy.

Peroneal Tendon Tenoscopy

Peroneal tenoscopy accesses both the peroneus brevis and peroneus longus sheaths from the posterior fibula to the inferior retinaculum. Partial longitudinal split tears of the peroneus brevis are directly visualized and debrided; fibular groove shallowness is assessed; and the peroneal retinaculum is evaluated for laxity contributing to subluxation. Tenoscopic peroneal groove deepening (endoscopic fibular groove plasty) has been described for cases where groove shallowness is the primary factor in tendon subluxation, avoiding the skin complications of the open approach.

FHL Tenoscopy

Flexor hallucis longus tenoscopy is particularly valuable for ballet dancers with FHL tenosynovitis at the posterior ankle (os trigonum region) and for patients with posterior ankle impingement. Tenoscopic FHL release at the knot of Henry (where FHL and FDL cross in the midfoot) addresses FHL-FDL interconnection adhesions producing limited great toe dorsiflexion. Dr. Biernacki at Balance Foot & Ankle performs ankle arthroscopy and tenoscopy for appropriate candidates, providing minimally invasive access to ankle and tendon pathology. Call (810) 206-1402 at our Bloomfield Hills or Howell office for an arthroscopic consultation.

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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 Hills 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