Plantar Fibroma — Treatment Options

What plantar fibroma is

A plantar fibroma is a benign fibrous tissue growth within the plantar fascia (the thick band of tissue along the bottom of your foot). It feels like a firm, round, pea-to-marble-sized lump usually in the middle of the arch. It’s NOT cancer. It’s not a tumor that will spread. It’s a localized overgrowth of fibrous connective tissue.

The condition exists on a spectrum:

• Solitary plantar fibroma — a single nodule, often asymptomatic
• Plantar fibromatosis — multiple nodules in the same fascia
• Ledderhose disease — hereditary multi-nodular form, sometimes associated with Dupuytren contracture of the hand

What causes them

The exact cause is unknown. Risk factors include:

• Family history of plantar fibroma or Dupuytren contracture
• Diabetes
• Long-term anticonvulsant or beta-blocker use (associations, not proven causation)
• Chronic plantar fascia strain or microtrauma
• Northern European ancestry (Ledderhose’s namesake population)

Symptoms

• Firm, marble-like lump in the arch — usually feels deep, fixed to the underlying fascia
• Pressure pain in shoes — especially flat shoes that press the fibroma against the ground
• Sometimes painless — many are noticed incidentally
• Pain with prolonged standing or walking
• Slow growth over months to years
• Multiple nodules possible (fibromatosis)

Diagnosis

• Clinical exam — characteristic firm fixed nodule in the central arch is usually diagnostic
• Ultrasound — confirms the fibrous nature, rules out cyst or other soft tissue mass
• MRI — needed if diagnosis is uncertain, mass is unusual in location or size, or to rule out atypical sarcoma (rare)
• Biopsy — only if MRI is concerning for malignancy

Watch: Dr. Tom Biernacki on the firm lump in your arch — what a plantar fibroma is, and how it is treated without surgery.

Treatment ladder

Step 1: Observation (asymptomatic)

Painless fibromas need no treatment. Most people live their whole lives with them.

Step 2: Custom orthotic with fibroma cutout

The single most useful intervention. A custom orthotic with a precise relief cutout under the fibroma eliminates the pressure that causes pain. 70-80% of painful fibromas become asymptomatic with proper orthotic. Properly placed metatarsal pad + medial flange + accommodative top cover.

Step 3: Topical verapamil (Level B evidence)

Topical verapamil 15% gel applied twice daily for 6-12 months. Causes gradual fibroma shrinkage in 40-60% of patients. Best for solitary lesions. Lower-evidence option but useful when orthotic alone isn’t enough.

Step 4: Cortisone injection (caution)

Targeted cortisone injection can reduce inflammation and pain. Limit 1-2 injections — cortisone can cause fat pad atrophy and may accelerate plantar plate weakening if overused. Use only when fibroma pain is significantly limiting function.

Step 5: Extracorporeal shockwave therapy (Level C evidence)

Emerging evidence for shockwave therapy reducing fibroma size and pain. Reasonable option for refractory cases, especially before considering surgery.

Step 6: Surgical excision — last resort

Surgical removal is reserved for:

• Painful fibromas that fail 6+ months of conservative care
• Functional limitation that significantly affects life quality

Important caveat: Plantar fibroma surgical recurrence rate is 25-50%. Recurrent fibromas often grow MORE aggressively than the original. This is why surgery is the LAST option, not the first.

When to see a podiatrist

• You can feel a firm lump in the arch of your foot
• Pain in the arch that you can localize to a discrete spot
• The lump is growing rapidly (rule out atypical lesion)
• Multiple nodules (fibromatosis pattern)
• Family history of fibroma or Dupuytren contracture + new arch lump

Bottom line

Plantar fibromas are benign and often painless. Painful ones respond to custom orthotics in the majority of cases. Surgery has a recurrence rate high enough that it should be the last resort, not the first. Don’t panic about the lump — but do see a podiatrist for proper diagnosis and orthotic-based pain management if it’s bothering you.

— Dr. Tom Biernacki, DPM, FACFAS