Accessory ossicles in the foot — extra small bones present in 5-15% of people — only become painful when irritated by activity, shoes, or injury. Most do not need surgery.
You’re in the right place. Dr. Tom Biernacki, DPM, FACFAS — board-certified foot & ankle surgeon with 3,000+ surgeries — explains exactly what accessory ossicles in the foot means and what works. Call (810) 206-1402 for same-day appointment at Howell or Bloomfield Township.
Medically reviewed by Dr. Tom Biernacki, DPM · Board-Certified Podiatric Surgeon · Last reviewed: April 2026 · Editorial Policy
The most important clinical decision with Accessory Ossicles Foot Os Naviculare Os Peroneum isn’t which treatment to start with — it’s identifying the correct subtype. That changes everything. Call (810) 206-1402.
Quick Answer
Accessory Ossicles of the Foot: Os Naviculare, Os Peroneum, relates to foot pain — typically caused by overuse, footwear, or biomechanics. Most patients improve in 6-12 weeks with conservative care. Same-week appointments in Howell + Bloomfield Township: (810) 206-1402.
Medically reviewed by Dr. Tom Biernacki, DPM — Board-certified foot & ankle surgeon, 3,000+ surgeries performed. Updated April 2026 with current clinical evidence. This article reflects real practice experience from Balance Foot & Ankle Specialists in Howell and Bloomfield Township, Michigan.
Quick Answer
Most foot and ankle problems respond to conservative care — proper footwear, supportive inserts, activity modification, and targeted stretching — within 4-8 weeks. Persistent pain beyond that window, or any symptom that prevents walking, warrants a podiatric evaluation to rule out fracture, tendon tear, or systemic cause.
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Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Township, MI. Last updated April 2026.
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Medically Reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatrist, Balance Foot & Ankle Specialists, Michigan. Last updated April 2026.
Accessory ossicles of the foot — secondary ossification centers that fail to fuse with adjacent bones during skeletal development — are common anatomical variants present in 10–40% of the population depending on the ossicle. Most accessory ossicles are incidental findings on foot X-ray that are completely asymptomatic and require no treatment; however, a subset become symptomatic from direct pressure, mechanical impingement, or stress fracture through the synchondrosis, and understanding the relevant anatomy and pathological conditions associated with each ossicle is essential for accurate diagnosis.
Os Naviculare (Accessory Navicular)
The most clinically important accessory ossicle — present in 4–12% of the population; three types: Type I (os tibiale externum) — a small, rounded ossicle within the posterior tibial tendon substance proximal to the navicular; Type II (the most common symptomatic type) — a large accessory ossicle connected to the navicular by fibrocartilaginous synchondrosis (the navicular tuberosity is enlarged and bipartite); Type III (cornuate navicular) — a completely fused variant producing a prominent navicular tuberosity. Type II symptoms: medial midfoot pain at the navicular prominence from direct shoe pressure; the synchondrosis between the accessory ossicle and the navicular is subjected to shear from posterior tibial tendon forces — synchondritis produces pain indistinguishable from PTT tendinopathy; management: wide accommodative footwear, custom orthotics with navicular relief; surgical excision (Kidner procedure — excision of the accessory ossicle with advancement of the PTT insertion) for refractory cases.
Os Peroneum, Os Trigonum, and Others
Os peroneum: located within the peroneus longus tendon at the cuboid notch; present in 10–20%; os peroneum syndrome — symptomatic pain at the lateral plantar foot when the ossicle fractures or the synchondrosis becomes painful from peroneus longus tendon injury; a fractured os peroneum may indicate a peroneus longus tendon tear requiring surgical evaluation. Os trigonum: accessory ossification center of the posterior talar process (7–25%); posterior ankle impingement in plantar flexion — the primary cause of os trigonum syndrome in dancers (described in detail in posterior ankle pain topics). Bipartite sesamoid: discussed in sesamoid topics — the developmental variant of the tibial sesamoid must be distinguished from fracture (no bone marrow edema in bipartite). Os supranaviculare, os intermetatarseum, accessory cuboid: less common variants that may cause local pain at the site of their prominence or synchondrosis. Dr. Biernacki at Balance Foot & Ankle evaluates symptomatic accessory ossicles with weight-bearing X-ray and MRI and distinguishes accessory ossicle synchondritis from other causes of foot pain. Call (810) 206-1402 at our Bloomfield Township or Howell office.
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Our board-certified podiatrists treat this condition at two convenient locations. Same-day appointments often available.
Differential Diagnosis: What Else Could It Be?
Not every case of accessory navicular syndrome is straightforward. In our clinic we routinely rule out three look-alike conditions before confirming the diagnosis. If your symptoms don’t match the classic presentation, one of these may explain the pain — which is why physical exam matters more than self-diagnosis.
| Condition | How It Differs |
|---|---|
| Posterior tibial tendon dysfunction | Pain along the tendon course with progressive flatfoot; may coexist. |
| Medial midfoot sprain | Ligamentous tenderness without a prominent bony bump. |
| Navicular stress fracture | Dorsal midfoot pain with impact; confirmed on MRI, not an accessory bone. |
Red Flags — When to See a Podiatrist Now
Seek same-day evaluation at Balance Foot & Ankle if you notice any of the following:
- Visible bony bump on the medial midfoot with redness
- Collapsing arch in a child or adolescent
- Pain preventing participation in sport
- Failed 6 weeks of orthotic and activity modification
Call (810) 206-1402 or request an appointment. Our Howell and Bloomfield Township offices reserve same-day slots for urgent foot and ankle issues.
In Our Clinic: What We See
Clinical perspective from Dr. Tom Biernacki, DPM — Balance Foot & Ankle, Howell & Bloomfield Township, MI:
Accessory navicular syndrome shows up in active adolescents and sometimes adults with a visible medial bump. In our clinic the exam finding is tenderness directly over the ossicle and pain with resisted inversion. X-rays confirm the accessory bone; MRI shows whether the ossicle is inflamed. Most patients respond to custom orthotics, activity modification, and short-term boot immobilization over 6-12 weeks. When conservative care fails, a Kidner procedure — excising the ossicle and re-attaching the posterior tibial tendon — restores arch function. Dr. Biernacki counsels families to try orthotics for 6 weeks first; surgery when needed is predictable but usually preventable.
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.
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When to See a Podiatrist
If foot or ankle pain has been bothering you for more than a few weeks, home care alone may not be enough. Balance Foot & Ankle offers same-week appointments at our Howell and Bloomfield Township clinics — no referral needed in most cases. Bring your current shoes and a short list of symptoms and we’ll build you a treatment plan in one visit.
Call Balance Foot & Ankle: (810) 206-1402 · Book online · Offices in Howell & Bloomfield Township
Frequently Asked Questions
When should I see a podiatrist?
See a podiatrist for any foot or ankle pain that persists more than 2 weeks, doesn’t improve with rest, limits your daily activities, or is accompanied by swelling, numbness, or skin changes. People with diabetes or circulation problems should see a podiatrist regularly even without symptoms.
What does a podiatrist treat?
Podiatrists diagnose and treat all conditions of the foot, ankle, and lower leg including plantar fasciitis, bunions, hammertoes, toenail problems, heel pain, nerve pain, diabetic foot care, sports injuries, fractures, and foot deformities — both surgically and non-surgically.
What can I expect at my first podiatry visit?
Your first visit includes a full medical history, physical examination of your feet and gait, and in-office diagnostic imaging if needed (X-rays, ultrasound). We’ll discuss your diagnosis and create a plan tailored to your foot type. Most visits take 30–45 minutes.
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
Insurance Accepted
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Howell Office
4330 E Grand River Ave
Howell, MI 48843
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Bloomfield Township Office
43494 Woodward Ave, #208
Bloomfield Township, MI 48302
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Your Board-Certified Podiatrists
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Same-week appointments available at both locations.
Book Your AppointmentMost 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
Seek immediate evaluation at Balance Foot & Ankle if you experience any of the following:
- Unable to bear weight
- Severe swelling with skin colour change
- Fever with foot pain (possible infection)
- Diabetes plus any new foot symptom
Call (810) 206-1402 — same-day and next-day appointments at our Howell and Bloomfield Township offices.
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Podiatrist-recommended products
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☎ (810) 206-1402Book Online →Pros & Cons of Conservative Care for foot care
Advantages
- ✓ Conservative care first
- ✓ Same-week appointments
- ✓ Multiple insurance accepted
Considerations
- ✗ Self-treatment can mask issues
- ✗ See a podiatrist if pain >2 weeks
Dr. Tom’s Recommended Products for foot care
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Ready to Get Back on Your Feet?
Same-day appointments in Howell + Bloomfield Township. Most insurance accepted. Dr. Tom Biernacki, DPM & team.
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About Your Care Team at Balance Foot & Ankle
Dr. Tom Biernacki, DPM · Board-Certified Foot & Ankle Surgeon. Specializes in conservative-first care, minimally invasive bunion surgery, and complex reconstruction.
Dr. Carl Jay, DPM · Accepting new patients. Specializes in sports medicine, athletic injuries, and routine podiatric care.
Dr. Daria Gutkin, DPM, AACFAS · Accepting new patients. Specializes in surgical reconstruction and pediatric podiatry.
Locations: 4330 E Grand River Ave, Howell, MI 48843 · 43494 Woodward Ave Suite 208, Bloomfield Township, MI 48302
Hours: Mon–Fri 8:00 AM – 5:00 PM · (810) 206-1402
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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.
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.