What Is Plantar Fibromatosis?

Plantar fibromatosis, also called Ledderhose disease, is a benign but often progressive condition in which firm fibrous nodules develop within the plantar fascia — the thick ligamentous band running along the bottom of the foot. Unlike plantar fasciitis (inflammation of the fascia), plantar fibromatosis involves actual structural changes within the fascia tissue itself, with abnormal fibroblast proliferation and collagen deposition forming palpable masses.

At Balance Foot & Ankle, we evaluate and manage plantar fibromatosis with a comprehensive understanding of its natural history, tendency toward recurrence, and the spectrum of conservative and surgical interventions available. Accurate diagnosis is essential because the nodules can be mistaken for other soft tissue masses — including malignant tumors — that require very different management.

Causes and Risk Factors

The exact cause of plantar fibromatosis is not fully understood. It belongs to the family of fibromatoses — a group of benign fibrous tissue proliferations that includes Dupuytren contracture of the hand, Peyronie disease of the penile shaft, and Garrod pads of the finger knuckles. The condition is often referred to as superficial fibromatosis because it involves the superficial fascia layer.

Established risk factors include a family history of fibromatosis, middle age (peak onset between 40 and 60), Northern European ancestry, chronic alcohol use, liver disease, epilepsy treated with phenytoin, and diabetes mellitus. Men are affected more frequently than women at approximately 3:1 ratio. Bilateral involvement occurs in up to 25 percent of cases.

Symptoms and Clinical Presentation

Patients typically notice a firm, non-tender nodule on the medial or central arch of the foot. The nodule is attached to the plantar fascia and does not move independently when pushed. Over time, some patients develop multiple nodules, and the overlying fascia may thicken and contract. Pain develops when nodules enlarge sufficiently to cause pressure with weight bearing, or when shoe pressure creates friction over the mass.

Unlike Dupuytren contracture in the hand, plantar fibromatosis rarely causes contracture of the toes. The nodules are located in the arch and mid-foot rather than at the base of the toes, though cases with digital involvement do occasionally occur.

Diagnosis

Clinical examination by an experienced podiatrist is usually sufficient to make the diagnosis. The nodule is characteristically located in the longitudinal arch, firmly attached to the deep surface of the plantar fascia, and has a hard, fibrous consistency. Tenderness is variable.

Diagnostic ultrasound confirms the presence of a hypoechoic mass within the plantar fascia and helps characterize its size and extent. MRI provides superior soft tissue detail and is recommended when the diagnosis is uncertain, when multiple lesions are present, or when surgical planning requires precise mapping of the lesion extent. MRI also helps differentiate plantar fibromatosis from malignant soft tissue tumors, which may have similar presentations. Biopsy is reserved for cases where imaging is inconclusive.

Conservative Treatment Options

Observation

Small, asymptomatic nodules that are not causing pain or walking difficulty can be observed without active treatment. Clinical follow-up every six to twelve months monitors for growth or symptom development. Many lesions remain stable for years without intervention.

Custom Orthotics and Padding

Orthotics with a relief cutout beneath the nodule offload pressure from the affected area during weight bearing. This is the first-line intervention for painful lesions. A U-shaped or donut-shaped padding around the nodule achieves a similar effect without custom orthotic fabrication.

Corticosteroid Injections

Intralesional corticosteroid injections may soften the nodule and reduce associated pain in early, small lesions. Results are inconsistent — some patients experience significant improvement while others see little benefit. Repeated injections risk skin atrophy and fat pad thinning beneath the foot. This approach is most appropriate for recent-onset, tender lesions rather than large, established fibromas.

Radiation Therapy

Low-dose superficial radiation therapy has emerged as an effective treatment for plantar fibromatosis, particularly for symptomatic or growing lesions. Radiation delivered in fractionated doses inhibits fibroblast proliferation and may halt or reverse nodule growth. Multiple studies demonstrate significant pain reduction and nodule stabilization in 60 to 80 percent of patients. Radiation does not eliminate established nodules but prevents progression and is associated with lower recurrence rates compared to surgery. It is performed in collaboration with a radiation oncology specialist and is well-tolerated with minimal side effects at the doses used.

Surgical Treatment

Surgical excision is reserved for symptomatic lesions that have failed conservative treatment and significantly limit walking or footwear use. The surgery requires wide local excision — removal of the nodule along with a margin of surrounding fascia — to reduce recurrence risk. Isolated lesion excision without fascial margin is associated with high recurrence rates exceeding 50 to 60 percent.

More extensive cases may require partial or total plantar fasciectomy — removal of the entire central band of the plantar fascia. This more aggressive approach reduces recurrence but carries risks including prolonged recovery, scar sensitivity, and altered foot biomechanics. The procedure requires careful patient selection and thorough preoperative counseling about expectations.

Wound healing after plantar surgery can be challenging given the tension forces of weight bearing, and patients must be committed to several weeks of protected weight bearing and wound care after surgery. Our surgical team provides detailed postoperative protocols to optimize healing and minimize complications.

Prognosis

Plantar fibromatosis is a benign condition that does not become malignant. However, it can be progressive and frustrating to manage due to its tendency to recur after treatment. Early intervention for symptomatic lesions — before they enlarge significantly — generally produces better outcomes than waiting until the nodules are very large and extensively infiltrate the plantar fascia. Regular monitoring and proactive conservative management offer the best long-term results for most patients.

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Frequently Asked Questions

Is plantar fibromatosis cancerous?

No. Plantar fibromatosis is a benign connective tissue disorder. The nodules are noncancerous fibrous growths in the plantar fascia and do not spread to other tissues.

Can plantar fibromatosis go away on its own?

Existing nodules rarely resolve spontaneously, but they may remain stable for years without worsening. Some patients never need invasive treatment.

Why is surgery usually a last resort?

Recurrence after surgical excision is common, ranging from 25% to 60%. Less invasive treatments like orthotics, injections, and shockwave therapy are tried first.

Your Board-Certified Podiatrists

Dr. Tom Biernacki, DPM

Board-Certified · FACFAS

Dr. Carl Jay, DPM

Board-Certified Podiatrist

Dr. Daria Gutkin, DPM

Podiatrist

Dr. Tom Biernacki, DPM

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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.