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

Medically Reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatrist, Balance Foot & Ankle Specialists, Michigan. Last updated April 2026.

The two sesamoid bones of the first metatarsophalangeal joint — the medial (tibial) and lateral (fibular) sesamoids — are embedded within the flexor hallucis brevis tendons and bear up to three times body weight during push-off. Sesamoid injuries produce plantar first MTP pain that is frequently attributed to plantar fasciitis or metatarsalgia and treated suboptimally for months before the sesamoid is identified as the pain generator.

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Sesamoid Fracture vs. Bipartite Sesamoid

The medial sesamoid is bipartite (naturally divided into two ossicles) in 10–30% of normal feet — radiographically indistinguishable from a fracture without comparison views or MRI. The key distinguishing features: a fracture produces jagged, irregular margins; a bipartite sesamoid has smooth, corticated borders and the same finding is typically present on the contralateral foot (bilateral in 85% of bipartite cases). MRI is the definitive study: acute fracture shows bone marrow edema and cortical disruption; bipartite sesamoid has fibrocartilaginous union without edema; avascular necrosis (AVN) shows decreased T1 signal with preserved or enhanced T2 signal reflecting marrow ischemia.

Management by Diagnosis

Sesamoiditis (stress response without fracture): reduced weight-bearing on the sesamoid with a sesamoid dancer pad (a U-shaped cut-out pad placed proximal to the sesamoid, transferring load to the metatarsal shaft rather than the sesamoid); custom orthotics with sesamoid relief; activity modification for 6–12 weeks. Sesamoid fracture: non-weight-bearing cast for 4–6 weeks for acute non-displaced fractures; surgical excision of the fractured sesamoid fragment for displaced fractures or non-union after 3 months of conservative management. AVN of the sesamoid: excision of the avascular sesamoid when conservative management fails; sesamoidectomy requires careful closure of the flexor hallucis brevis tendon to prevent hallux cock-up deformity from loss of flexion force. Dr. Biernacki at Balance Foot & Ankle evaluates plantar first MTP pain with weight-bearing X-ray and MRI when sesamoid pathology is suspected. Call (810) 206-1402 at our Bloomfield Hills or Howell office.

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Our board-certified podiatrists treat this condition at two convenient locations. Same-day appointments often available.

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When to See a Podiatrist

Many foot conditions can be managed conservatively at home, but some require professional evaluation. See a podiatrist promptly if you experience:

  • Pain that persists for more than 2 weeks despite rest
  • Swelling, redness, or warmth that isn’t improving
  • Numbness, tingling, or burning in the feet
  • A wound or sore that is not healing within 2 weeks
  • Any foot concern if you have diabetes or poor circulation
  • Nail changes that suggest fungal infection or other problems

At Balance Foot & Ankle, our three board-certified podiatrists — Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin — provide comprehensive foot and ankle care at our Howell and Bloomfield Township offices. Most insurance plans are accepted.

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Board-certified podiatrists Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin see patients daily at our Howell and Bloomfield Township, MI offices.

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Sesamoid Fracture & Avascular Necrosis Treatment in Michigan

Sesamoid injuries under the big toe — from stress fractures to avascular necrosis — cause disabling forefoot pain. Our podiatrists provide expert diagnosis differentiating bipartite sesamoids from true fractures, with treatment options from orthotics to surgical sesamoidectomy.

Explore Forefoot Pain Treatment | Book Your Appointment | Call (810) 206-1402

Clinical References

  1. Richardson EG. Hallucal sesamoid pain: causes and surgical treatment. J Am Acad Orthop Surg. 1999;7(4):270-278.
  2. Cohen BE. Hallux sesamoid disorders. Foot Ankle Clin. 2009;14(1):91-104.
  3. Bichara DA, Henn RF, Theodore GH. Sesamoiditis of the hallux. Foot Ankle Clin. 2014;19(1):29-40.

Related reading: Plantar Fasciitis Secrets — our complete heel pain guide: what works and what to avoid.

Medical References
  1. Plantar Fasciitis: Diagnosis and Conservative Management (PubMed)
  2. Plantar Fasciitis (APMA)
  3. Diagnosis and Treatment of Plantar Fasciitis (PubMed / AAFP)
  4. Heel Pain (APMA)
This article has been reviewed for medical accuracy by Dr. Tom Biernacki, DPM. References are provided for informational purposes.