Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Hills, MI
Last reviewed: May 2026
| Coalition Type | Tissue | Subtalar Rigidity | Age of Symptoms | Surgical Approach |
|---|---|---|---|---|
| Fibrous | Dense fibrous tissue | Partial — still some motion | Younger (8–12) | Resection usually effective |
| Fibrocartilaginous | Fibrocartilage | Moderate — limited motion | 10–14 | Resection — good success if <50% facet |
| Osseous (bony) | Cortical bone | Complete — rigid hindfoot | 12–16 (ossification completes) | Resection if early; fusion if arthritis present |
| Factor | Favors Resection | Favors Fusion |
|---|---|---|
| Age | <16 years (skeletally immature) | >16–18 years |
| Coalition size (% posterior facet) | <50% | >50% |
| Posterior facet arthritis | None | Moderate or severe |
| Prior surgery | No prior resection | Failed prior resection |
| Subtalar motion remaining | Some motion present | Completely rigid |
| Talar beaking severity | Mild | Severe (indicates chronic impingement) |
Quick answer: Talocalcaneal Coalition is a common foot/ankle topic that affects many patients. The 2026 evidence-based approach combines proper diagnosis, conservative-first treatment, and escalation only when needed. We treat this regularly at our Howell and Bloomfield Hills practices. Call (810) 206-1402.
Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatrist | Balance Foot & Ankle, Michigan | 5,000+ patients/year
The most important clinical decision with Talocalcaneal Coalition isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
The most important clinical decision with Talocalcaneal Coalition isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
Talocalcaneal Coalition Overview
Talocalcaneal (TC) coalition is an abnormal connection between the talus and calcaneus, most commonly at the middle facet of the subtalar joint. It accounts for approximately 37% of all tarsal coalitions. Like calcaneonavicular coalition, it presents in adolescence and can be bony, cartilaginous, or fibrous.
Symptoms
Symptoms mirror calcaneonavicular coalition: rigid flatfoot, peroneal spasm, subtalar pain (often felt deep below and behind the medial malleolus), reduced or absent subtalar motion, frequent ankle sprains, and pain with walking on uneven terrain. Bilateral involvement is common (~50%).
Diagnosis: The C-Sign
The “C-sign” on lateral foot X-ray — a C-shaped bony arch formed by the talar dome and the inferior border of the sustentaculum tali — suggests talocalcaneal coalition. However, CT scanning is essential for definitive diagnosis and surgical planning, as the middle facet is not well visualized on plain X-rays. MRI is best for cartilaginous and fibrous coalitions.
Conservative Treatment
Same as for calcaneonavicular coalition: activity modification, orthotics, cast immobilization for acute pain, physical therapy. Some patients manage long-term with orthotics alone.
Surgical Treatment
TC coalition resection is technically more demanding and has less predictable outcomes than CN coalition resection. It is appropriate only when the coalition is fibrous or cartilaginous, is less than 50% of the posterior facet, and there is no significant subtalar arthritis. For cases with arthritis or large coalitions, subtalar or triple arthrodesis (fusion) is the preferred option.
FAQs
Which coalition is easier to treat surgically? Calcaneonavicular coalition resection consistently produces better outcomes than talocalcaneal coalition resection due to more favorable anatomy and less risk of subtalar arthritis progression.
Michigan Foot Pain? See Dr. Biernacki In Person
Same-week appointments at our Howell and Bloomfield Hills offices.
📞 (810) 206-1402 Book Online →What is Foot pain?
Foot pain is a common foot/ankle condition that affects mobility and quality of life. Understanding the underlying cause is the first step in successful treatment. Our podiatrists at Balance Foot & Ankle perform a hands-on biomechanical exam, review your activity history, and use diagnostic imaging when appropriate to identify the root cause—not just treat the symptom. Many patients have been told to “rest and ice” without a deeper diagnostic workup; our approach is different.
Symptoms and warning signs
Common signs of foot pain include pain that worsens with activity, morning stiffness, swelling, tenderness when palpated, and difficulty bearing weight. If you experience sudden severe pain, inability to walk, visible deformity, numbness or color change, contact our office the same day or visit urgent care—these can signal a more serious injury such as a fracture, tendon rupture, or vascular compromise. Diabetics with any foot wound should seek same-day care.
Conservative treatment options
Most cases of foot pain respond to non-surgical care: structured rest, supportive footwear changes, custom orthotics, targeted stretching and strengthening protocols, anti-inflammatory medications when medically appropriate, and in-office procedures such as ultrasound-guided injections. We also offer advanced therapies including MLS laser therapy, EPAT/shockwave, regenerative injections, and image-guided procedures. Treatment is sequenced from least invasive to most invasive, and we explain the rationale at every step.
When is surgery considered?
Surgery is reserved for cases that fail 3-6 months of well-structured conservative care, when there is structural pathology (severe deformity, complete tear, advanced arthritis), or when imaging shows damage that will not heal without intervention. Our surgeons have performed 3,000+ foot and ankle procedures and prioritize minimally-invasive techniques whenever appropriate. We discuss recovery timelines, return-to-activity milestones, and realistic outcome expectations before any procedure is scheduled.
Recovery timeline and prevention
Recovery from foot pain varies based on severity and chosen treatment path. Conservative cases often improve within 4-8 weeks with consistent adherence to the protocol. Post-procedural recovery may range from a few days (in-office procedures) to several months (reconstructive surgery). Long-term prevention involves footwear assessment, activity modification, structured strengthening, and regular check-ins with your podiatrist if you have a history of recurrence. We provide written home-exercise plans and digital follow-up support.
Ready to feel better?
Same-week appointments available in Howell and Bloomfield Hills, Michigan.
Book Your VisitIn-Office Treatment at Balance Foot & Ankle
If home treatment isn’t providing relief for your flat feet, our podiatry team at Balance Foot & Ankle can help with same-day evaluations and advanced in-office care.
Same-day appointments available. (810) 206-1402
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Or call: (810) 206-1402
Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has made him one of the most-followed foot & ankle educators on YouTube.