What Is Kohler’s Disease?

Kohler’s disease is an osteochondrosis — a disruption of blood supply — affecting the navicular bone of the foot. The navicular, a small boat-shaped bone on the inner midfoot, is particularly vulnerable during the years when it is ossifying (hardening from cartilage to bone). Disrupted blood flow causes the navicular to flatten, fragment, and become painful, leading to a characteristic antalgic gait (limping) in affected children.

Though uncommon, Kohler’s disease is important to diagnose correctly to avoid unnecessary concern and ensure appropriate management. The podiatrists at Balance Foot & Ankle in Howell and Bloomfield Township, Michigan are experienced with pediatric foot conditions including Kohler’s disease.

Who Gets Kohler’s Disease?

Kohler’s disease most commonly affects children between 2 and 9 years old, with boys affected three to four times more often than girls. Boys typically present between ages 4-5, girls slightly earlier at 2-4 years. The condition is usually unilateral (one foot), though bilateral cases occur in a small percentage of patients. Active children may be more symptomatic, though activity does not cause the disease itself.

Causes

The navicular is the last tarsal bone to ossify, making it vulnerable to compressive forces at a critical developmental window. Mechanical stress from walking before the bone has fully hardened is thought to disrupt the tenuous blood supply, triggering avascular necrosis. The condition is self-limiting — as the navicular receives adequate blood flow again and completes ossification, it typically remodels to a normal or near-normal shape.

Symptoms

The hallmark of Kohler’s disease is a limping child who bears weight on the outer edge of the foot to avoid pressure on the painful navicular. Direct tenderness over the navicular — found on the inner side of the midfoot slightly ahead of the inner ankle bone — is consistently present. Swelling may be visible in this area. Symptoms typically last weeks to months and resolve spontaneously, though they can recur. Most children remain active despite the pain, unlike adults with similar bone problems.

Diagnosis

X-rays show characteristic findings: the navicular appears sclerotic (densely white), flattened, and fragmented. Importantly, these radiographic findings must be interpreted in context — normal navicular ossification can appear irregular in young children and should not be confused with Kohler’s disease. Clinical symptoms must correlate with imaging findings. MRI can detect early bone marrow changes when X-rays are inconclusive.

Treatment

Treatment is primarily aimed at symptom relief since the condition resolves spontaneously in most cases. Options include a short-leg walking cast or supportive boot for 4-8 weeks to offload the painful navicular during acute phases, arch-supportive orthotics to reduce navicular loading during the recovery period, activity modification during flare-ups, and anti-inflammatory medications for pain management. Most children recover fully within 2-3 years, with the navicular remodeling to near-normal dimensions.

Long-Term Prognosis

The prognosis for Kohler’s disease is excellent. Long-term follow-up studies show that the vast majority of children have a radiographically normal navicular by adulthood with no lasting functional impairment. Unlike Freiberg’s infraction in adults, Kohler’s disease rarely requires surgical intervention.

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Balance Foot & Ankle — Howell & Bloomfield Township, MI

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Dr. Tom Biernacki, DPM

Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon 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 reached over one million views.