Haglund's Deformity

Definition

Haglund's deformity is a bony enlargement of the posterosuperior aspect of the calcaneus that causes posterior heel pain through mechanical irritation of the retrocalcaneal bursa and Achilles tendon insertion. First described by Patrick Haglund in 1928, the condition is colloquially known as "pump bump" due to its association with rigid-heeled footwear.

Epidemiology

Prevalence:

• Anatomic prominence present in 20-30% of general population
• Symptomatic in subset of those with prominence
• Peak age: 20-40 years (active working and athletic population)
• Gender: Female predominance (1.5-2:1 ratio)

Risk Populations:

• Runners and endurance athletes
• Ice skaters and figure skaters (rigid boot compression)
• Women wearing high-heeled dress shoes ("pump bump")
• Military personnel and police (occupational footwear)
• Workers in hospitality industry (dress shoe requirements)

Natural History:

• Self-limiting in many cases with activity modification
• 70-80% respond to conservative management over 3-6 months
• Surgical intervention required in 20-30% of symptomatic cases
• Bilateral involvement in 60% of symptomatic patients

Aetiology

Haglund's deformity develops through a combination of intrinsic and extrinsic factors:

Intrinsic Factors:

• Prominent posterosuperior calcaneal tuberosity (anatomic variant)
• High-arched cavus foot deformity (increased posterior heel pitch)
• Pes planus with valgus hindfoot (altered Achilles pull vector)
• Tight Achilles tendon (gastrocnemius-soleus contracture)
• Inflammatory arthropathy (predisposes to bursal inflammation)

Extrinsic Factors:

• Rigid-backed footwear causing repeated heel counter friction
• Sudden increase in training intensity or running mileage
• Hill running and stair climbing (increased Achilles tension)
• Occupational footwear requirements
• Ice skating and figure skating activities

Relevant Anatomy

Posterior Heel Structures

The posterosuperior aspect of the calcaneus is a critical zone with multiple overlapping structures that contribute to Haglund's pathology:

Bony Anatomy:

• Posterosuperior calcaneal tuberosity - anatomic insertion site for Achilles tendon
• Lateral process - prominence often enlarged in Haglund's deformity
• Bursal projection - superior ridge that defines retrocalcaneal bursa location
• Medial tubercle - attachment for superficial Achilles fibres

Soft Tissue Structures:

• Achilles tendon insertion - crescent-shaped footprint approximately 2cm wide
• Retrocalcaneal bursa - located between posterosuperior calcaneus and anterior Achilles surface
• Superficial calcaneal bursa - between skin and posterior Achilles surface (adventitial bursa)
• Kager's fat pad - triangular radiolucent area anterior to Achilles on lateral X-ray

Neurovascular Structures at Risk

Sural Nerve:

• Courses along lateral border of Achilles tendon
• Average distance 18-20mm from lateral border at insertion level
• At risk with lateral incision approach
• Injury causes lateral foot numbness and painful neuroma

Blood Supply to Achilles:

• Proximal: muscular branches from posterior tibial and peroneal arteries
• Mid-portion: watershed area with poorest blood supply (2-6cm proximal to insertion)
• Distal insertion: branches from posterior tibial and peroneal arteries via periosteal vessels
• Surgical dissection may compromise already tenuous vascular supply

Pathophysiology

Mechanical Irritation Model

Haglund's deformity develops through repetitive mechanical friction and compression:

1. Bony prominence - anatomic or acquired posterosuperior calcaneal exostosis
2. Shoe counter pressure - rigid heel counter compresses prominence against anterior Achilles
3. Bursal inflammation - retrocalcaneal bursa becomes inflamed and thickened
4. Tendon degeneration - chronic friction leads to insertional Achilles tendinopathy
5. Reactive bone formation - further prominence develops, perpetuating cycle

Histopathological Changes

Retrocalcaneal Bursa:

• Synovial hyperplasia and proliferation
• Fibrinous exudate and inflammatory cell infiltration
• Bursal wall thickening with fibrosis
• Adhesions to adjacent Achilles tendon

Achilles Tendon Insertion:

• Collagen disorganization and fibrinoid degeneration
• Increased mucoid ground substance
• Neovascularization with neural ingrowth (pain pathway)
• Calcification within degenerative tendon fibres
• Loss of normal parallel collagen architecture

Risk Factors

Intrinsic Factors:

• High-arched cavus foot (increased heel pitch)
• Prominent posterosuperior calcaneal tuberosity (anatomic variant)
• Tight Achilles tendon (gastrocnemius-soleus complex contracture)
• Pes planus with valgus hindfoot (abnormal Achilles pull vector)
• Inflammatory arthropathy (increased bursal inflammation)

Extrinsic Factors:

• Rigid-backed footwear (pump shoes - hence "pump bump")
• Running and athletic activities (repetitive loading)
• Sudden increase in training intensity
• Ice skating and figure skating (rigid boot compression)
• Occupational footwear (work boots, military boots)

History Taking

Typical Presentation

Chief Complaint:

• Posterior heel pain localized to Achilles insertion area
• Gradual onset over weeks to months
• Activity-related pain, worse with running or walking
• Visible prominence on posterior heel ("pump bump")

Pain Characteristics:

• Sharp or aching pain at posterosuperior heel
• Worse with initial steps after rest (similar to plantar fasciitis)
• Aggravated by shoe counter pressure
• Relief with open-backed shoes or going barefoot
• May have associated morning stiffness

Functional Impact:

• Difficulty wearing dress shoes or athletic shoes
• Altered gait to avoid heel strike
• Reduced exercise tolerance
• May limit sporting activities

Key History Questions

• How long have you had heel pain? (Determines conservative trial adequacy)
• What treatments have you tried? (NSAIDs, heel lifts, physiotherapy, injections)
• What type of shoes do you wear? (Rigid heel counter is key provocative factor)
• What sports or activities? (Running, skating, occupational demands)

Physical Examination

Inspection (Standing and Walking)

Shoe Counter Test:

• Ask patient to demonstrate problematic footwear
• Observe heel counter rigidity and height
• Note wear pattern on shoe posterior aspect

Hindfoot Alignment:

• Assess from behind: valgus vs neutral vs varus
• Pes cavus (high arch) predisposes to Haglund's
• "Too many toes" sign suggests pes planus with valgus

Visible Prominence:

• Posterosuperior calcaneal prominence visible and palpable
• Bilateral in 60% of symptomatic cases
• Overlying skin changes (erythema, callus, bursitis)

Palpation

Haglund's Triangle:

1. Achilles tendon - palpate full length for thickening, nodules, crepitus
2. Retrocalcaneal bursa - tender anterior to Achilles, just superior to insertion
3. Posterosuperior prominence - bony prominence palpable through Achilles

Tenderness Localization:

• Lateral compression test - squeeze heel medially and laterally to compress retrocalcaneal space (positive if painful)
• Direct posterior pressure - pain with pressure over prominence
• Achilles insertion tenderness - suggests concurrent insertional tendinopathy

Range of Motion

Ankle Dorsiflexion:

• Measure with knee extended (gastrocnemius tight) and flexed (isolated soleus)
• Normal: 10-15 degrees with knee extended
• Haglund's patients often have reduced dorsiflexion (less than 5 degrees)
• Silfverskiöld test differentiates gastrocnemius vs soleus contracture

Subtalar Motion:

• Assess inversion and eversion
• Rule out hindfoot arthritis as pain source

Special Tests

Passive Dorsiflexion Pain Test:

• Passively dorsiflex ankle while palpating retrocalcaneal space
• Positive if reproduces posterior heel pain
• Indicates bursal impingement

Two-Finger Squeeze Test:

• Compress Achilles tendon between thumb and finger at insertion
• Positive if elicits sharp pain
• Suggests insertional Achilles tendinopathy

Single Heel Raise Test:

• Patient performs single-leg heel raise on affected side
• Pain or inability indicates Achilles dysfunction
• Assess number of repetitions compared to contralateral side

Imaging Studies

Plain Radiographs (First-Line)

Standard Views:

• Lateral heel radiograph - primary diagnostic view
• AP foot - assess for concurrent pathology
• Axial calcaneal view - evaluate calcaneal width and shape

Lateral Radiograph Assessment - Parallel Pitch Lines:

The Fowler-Philip angle and parallel pitch lines quantify posterosuperior prominence:

1. Posterior calcaneal line - tangent to posterior calcaneal border
2. Inferior calcaneal line - tangent to plantar calcaneal surface
3. Total calcaneal angle - angle between posterior and inferior lines (normal 44-69 degrees)
4. Parallel pitch line - parallel to inferior calcaneal line, drawn from anterior process
5. Posterosuperior angle - angle between posterior surface and parallel pitch line

Diagnostic Criteria:

• Posterosuperior angle greater than 75 degrees suggests Haglund's deformity
• Prominence extending above parallel pitch line indicates exostosis
• Parallel pitch line above superior calcaneal border diagnostic

Additional X-ray Findings:

• Retrocalcaneal bursitis (soft tissue opacity anterior to Achilles)
• Achilles tendon thickening (greater than 9mm at insertion)
• Insertional calcification (enthesopathy)
• Kager's fat pad obliteration (suggests inflammation)

Magnetic Resonance Imaging (MRI)

Indications:

• Atypical presentation requiring diagnostic clarification
• Preoperative planning to assess Achilles tendon quality
• Failed surgery evaluation
• Suspicion of concurrent pathology

Key MRI Findings:

• Retrocalcaneal bursa - fluid signal on T2-weighted images (normal less than 2mm, abnormal greater than 3mm)
• Achilles tendinopathy - intratendinous signal changes, thickening, partial tears
• Bone marrow edema - posterosuperior calcaneus signal changes on STIR sequences
• Kager's fat pad edema - indicates active inflammation
• Enthesophyte formation - bone proliferation at insertion

Ultrasound

Advantages:

• Dynamic assessment during ankle motion
• Real-time visualization of bursa compression
• Guide for injection therapy
• Lower cost than MRI

Sonographic Features:

• Retrocalcaneal bursa distension (greater than 3mm anteroposterior dimension)
• Achilles tendon thickening and hypoechoic areas (tendinopathy)
• Posterosuperior calcaneal prominence contour
• Power Doppler may show hypervascularity (active inflammation)

Differential Diagnosis

Posterior heel pain is not synonymous with Haglund's deformity. The key examination distinction is the location of maximal tenderness and its relationship to the Achilles insertion.

Algorithm

View larger

Conservative Management (First-Line)

Initial Treatment (0-6 Weeks)

Activity Modification:

• Reduce or eliminate provocative activities (running, jumping)
• Avoid rigid-backed footwear
• Open-backed shoes or sandals during acute phase

Footwear Modifications:

• Heel lifts (5-10mm) - reduce Achilles tension and posterior impingement
• Soft heel counters - remove or modify rigid back of shoe
• Wider toe box - accommodate orthotic if pes planus present
• Padded heel cups - cushion and offload posterior prominence

Pharmacological Management:

• NSAIDs for 2-4 weeks (ibuprofen 400mg three times daily, naproxen 500mg twice daily)
• Ice application 15-20 minutes three times daily
• Topical anti-inflammatory gel (diclofenac)

Physiotherapy Protocol (6 Weeks to 3 Months)

Stretching Program:

• Gastrocnemius stretch - knee extended, foot dorsiflexed, hold 30 seconds, 5 repetitions, 3 times daily
• Soleus stretch - knee flexed 20-30 degrees, foot dorsiflexed
• Combined stretch - slant board stretching
• Goal: achieve 10 degrees dorsiflexion with knee extended

Eccentric Strengthening (Alfredson Protocol):

• Bilateral heel raise to tiptoes on step
• Lower affected heel slowly below step level (eccentric phase)
• 3 sets of 15 repetitions, twice daily
• Perform with knee straight and knee bent (gastrocnemius and soleus isolation)
• Continue for 12 weeks minimum

Modalities:

• Ultrasound therapy (controversial benefit)
• Iontophoresis with dexamethasone
• Low-level laser therapy (limited evidence)

Orthotics and Bracing (3-6 Months)

Custom Orthotics:

• Indicated for pes planus or cavus foot deformity
• Medial posting for valgus hindfoot
• Arch support to normalize foot biomechanics
• Open heel design to avoid posterior compression

Night Splints:

• Maintain ankle in neutral to 5 degrees dorsiflexion
• Prevent morning contracture
• Wear nightly for 3-6 months
• 80% compliance required for benefit

Advanced Conservative Therapies (3-6 Months)

Extracorporeal Shockwave Therapy (ESWT):

• Indication: failed 3-6 months conservative treatment
• Protocol: 2000-4000 shocks per session, 3-5 sessions, 1-2 week intervals
• Energy flux density 0.08-0.28 mJ/mm²
• Success rate: 60-70% symptom improvement
• Mechanism: neovascularization stimulation, pain receptor desensitization

Injection Therapy:

• Corticosteroid injection (retrocalcaneal bursa)
  • Ultrasound-guided approach preferred
  • Methylprednisolone 40mg or triamcinolone 40mg with 1ml lidocaine
  • Maximum 2-3 injections lifetime (Achilles rupture risk)
  • 60-70% short-term pain relief (3-6 months)
• Platelet-Rich Plasma (PRP)
  • Emerging therapy for insertional tendinopathy
  • May have lower rupture risk than corticosteroid
  • Limited high-quality evidence for efficacy
  • Typically 2-3 injections at 4-week intervals

Surgical Management

Indications for Surgery

Absolute Indications:

• Failed comprehensive conservative management for 6 months minimum
• Documented compliance with physiotherapy protocol
• Significant functional impairment affecting quality of life

Relative Indications:

• Patient preference after informed consent regarding risks
• Severe deformity with skin breakdown
• Achilles partial tear requiring surgical repair

Contraindications:

• Active infection
• Severe peripheral vascular disease
• Inadequate conservative trial (less than 3-6 months)
• Medical comorbidities precluding safe surgery
• Unrealistic patient expectations

Surgical Techniques - Evidence-Based Approaches

The surgical management of Haglund's deformity requires careful decision-making regarding approach and technique based on the specific components of the pathology.

Rehabilitation Protocol

Phase 1: Protection (Weeks 0-6)

Central Tendon-Splitting Approach:

• Bulky dressing with posterior splint in neutral for 2 weeks
• Below-knee walking boot at 2 weeks
• Weight-bearing as tolerated in boot
• Remove boot for gentle ankle pumps 3-4 times daily

Detachment with Suture Anchor Repair:

• Below-knee cast in 20 degrees equinus for 4 weeks
• Non-weight-bearing or touch-down weight-bearing only
• Transition to neutral boot at 4 weeks
• Progressive weight-bearing weeks 4-6

Phase 2: Mobilisation (Weeks 6-12)

Week 6-8:

• Wean from boot to supportive shoe with heel lift
• Active ankle range of motion exercises
• Gentle Achilles stretching (avoid aggressive dorsiflexion)
• Stationary bicycle for cardiovascular fitness
• Pool exercises (non-impact)

Week 8-12:

• Progressive resistance exercises
• Eccentric Achilles strengthening (single-leg heel lowers)
• Proprioceptive training (wobble board, balance exercises)
• Gradual return to normal gait pattern
• Remove heel lift by 12 weeks

Phase 3: Strengthening (Weeks 12-26)

Months 3-4:

• Progressive calf strengthening program
• Isokinetic exercises
• Start low-impact activities (swimming, cycling)
• Begin straight-line jogging if strength adequate

Months 4-6:

• Sport-specific training
• Plyometric exercises (jumping, hopping)
• Agility drills
• Progressive running program

Phase 4: Return to Activity (Months 6-12)

Criteria for Return to Sport:

• No pain with heel raises or hopping
• Calf strength greater than 85% of contralateral side (isokinetic testing)
• Full ankle range of motion
• Normal gait without limp
• Confidence in affected heel

Gradual Return:

• Low-impact sports first (cycling, swimming)
• Progress to higher-impact activities (running, court sports)
• Full unrestricted return typically 9-12 months for competitive athletes

Long-Term Outcomes

Success Rates:

• 80-90% good to excellent outcomes at 2-year follow-up
• Satisfaction rates 85-95% when appropriate patient selection
• Return to pre-injury activity level: 70-80% of athletes
• Recurrence rate: 5-10% with proper surgical technique

Factors Predicting Success:

• Adequate conservative trial before surgery (greater than 6 months)
• Isolated Haglund's without concurrent pathology
• Compliance with rehabilitation protocol
• Non-smoking status
• Absence of workers' compensation claim

Does Shockwave Add Anything?

The two best-quality trials reach opposite-sounding conclusions. Rompe (2008, Level I) found low-energy shockwave superior to floor-based eccentrics for insertional disease, whereas Mansur (2021, Level I, n=119) found that adding shockwave to a structured eccentric programme gave no extra benefit at 24 weeks. The reconciliation: shockwave is most useful as a substitute or adjunct when exercise alone is failing, not as a routine add-on. Position shockwave as an option, not a mandate.

Eccentric Protocol Must Be Modified at the Insertion

The classic Alfredson protocol drops the heel below the step into dorsiflexion, which compresses the diseased insertion against the calcaneus. For insertional disease the protocol is modified to floor-level eccentrics (no below-horizontal dorsiflexion). Quoting Alfredson without this caveat is a common trap - the original work was on mid-substance tendinopathy.

How Much Bone to Resect?

There is no validated target for the amount of calcaneal resection. Inadequate resection risks recurrence; over-resection risks weakening or avulsing the insertion and even calcaneal stress fracture. Most authors aim to bring the posterosuperior corner below the parallel pitch line while protecting the insertion footprint, but the "correct" amount remains opinion-based.

Tendon-Splitting vs Lateral vs Osteotomy

All decompress effectively. Central tendon-splitting allows quicker return to function (Anderson 2008) and is the workhorse for central/medial disease; the lateral approach avoids the tendon but risks the sural nerve. The Zadek dorsal closing-wedge osteotomy is a resurgent tendon-sparing alternative that corrects the underlying bony geometry with low (minor) complication rates (Poutoglidou 2023), but no trial has compared it head-to-head with debridement.

Endoscopic vs Open

Endoscopic calcaneoplasty (Jerosch 2007) shows good results with lower morbidity for isolated bony prominence, but cannot address significant intratendinous degeneration or large calcification. Patient selection - not surgeon enthusiasm - drives outcome.

Corticosteroid Injection

Retrocalcaneal corticosteroid gives short-term relief but is widely cautioned against because of Achilles rupture risk; ultrasound guidance to keep steroid out of the tendon and a strict injection limit are prudent. PRP is promoted as a lower-rupture-risk alternative but currently lacks high-quality supporting evidence in this specific condition.

Global Epidemiology

Haglund's deformity occurs worldwide and is consistently linked to the same drivers regardless of region: running and endurance sport, rigid-heeled footwear, and occupations requiring stiff-backed boots (military, police, hospitality, healthcare). A female predominance (roughly 1.5-2:1) is reported in most series and is generally attributed to dress and fashion footwear. Peak presentation is in the active 20-40 year age group, with frequent bilateral involvement. A prominent posterosuperior calcaneus is an anatomical variant seen in a substantial minority of asymptomatic feet, so radiographic prominence must always be correlated with the clinical picture.

Side-by-Side Guidance

Haglund's deformity sits within the broader insertional Achilles tendinopathy literature; no single society publishes a dedicated standalone guideline, so recommendations are drawn from foot and ankle and sports-medicine consensus.

Registry and Evidence Notes

Haglund's deformity involves no implant, so it does not feature in arthroplasty registries (NJR, AJRR, AOANJRR, SHAR). The evidence base is therefore built from single-centre series and a small number of randomised trials of conservative care (Rompe 2008; Mansur 2021) plus systematic reviews of osteotomy (Poutoglidou 2023). There is a recognised lack of randomised comparison between surgical techniques globally.

High- vs Limited-Resource Practice Variation

In well-resourced settings, ultrasound-guided injection, MRI for tendon mapping, shockwave devices, and endoscopic calcaneoplasty are routinely available, allowing a graded, imaging-guided pathway. In limited-resource settings, management relies on clinical diagnosis, plain radiographs, footwear modification, heel lifts and a supervised home eccentric programme; open debridement with exostectomy remains the default surgical option where endoscopic equipment is unavailable. The core principles - an adequate conservative trial, correlation of imaging with clinical findings, and tendon-preserving surgery - apply universally.

References

1. Kang S, Thordarson DB, Charlton TP. Insertional Achilles tendinitis and Haglund's deformity. Foot Ankle Int. 2012;33(6):487-491.

2. Pavlov H, Heneghan MA, Hersh A, Goldman AB, Vigorita V. The Haglund syndrome: initial and differential diagnosis. Radiology. 1982;144(1):83-88.

3. Watson AD, Anderson RB, Davis WH. Comparison of results of retrocalcaneal decompression for retrocalcaneal bursitis and insertional Achilles tendinosis with calcific spur. Foot Ankle Int. 2000;21(8):638-642.

4. Brunner J, Anderson J, O'Malley M, Bohne W, Deland J, Kennedy J. Physician and patient based outcomes following surgical resection of Haglund's deformity. Acta Orthop Belg. 2005;71(6):718-723.

5. Alfredson H, Lorentzon R. Chronic Achilles tendinosis: recommendations for treatment and prevention. Sports Med. 2000;29(2):135-146.

6. Chuckpaiwong B, Berkson EM, Theodore GH. Extracorporeal shock wave for chronic proximal plantar fasciitis: 225 patients with results and outcome predictors. J Foot Ankle Surg. 2009;48(2):148-155.

7. Jerosch J, Schunck J, Khoja A. Endoscopic calcaneoplasty (ECP) as a surgical treatment of Haglund's syndrome. Knee Surg Sports Traumatol Arthrosc. 2007;15(7):927-934.

8. Scholten PE, van Dijk CN. Endoscopic calcaneoplasty. Foot Ankle Clin. 2006;11(2):439-446.

9. Leitze Z, Sella EJ, Aversa JM. Endoscopic decompression of the retrocalcaneal space. J Bone Joint Surg Am. 2003;85(8):1488-1496.

10. Anderson JA, Suero E, O'Loughlin PF, Kennedy JG. Surgery for retrocalcaneal bursitis: a tendon-splitting versus a lateral approach. Clin Orthop Relat Res. 2008;466(7):1678-1682.

11. Nicholson CW, Berlet GC, Lee TH. Prediction of the success of nonoperative treatment of insertional Achilles tendinosis based on MRI. Foot Ankle Int. 2007;28(4):472-477.

12. McGarvey WC, Palumbo RC, Baxter DE, Leibman BD. Insertional Achilles tendinosis: surgical treatment through a central tendon splitting approach. Foot Ankle Int. 2002;23(1):19-25.

13. Natarajan S, Narayanan VL, Ramadorai AK. Central tendon-splitting approach for the treatment of insertional Achilles tendinopathy. J Foot Ankle Surg. 2008;47(4):282-288.

14. Den Hartog BD. Flexor hallucis longus transfer for chronic Achilles tendonosis. Foot Ankle Int. 2003;24(3):233-237.

15. Elias I, Raikin SM, Besser MP, Nazarian LN. Outcomes of chronic insertional Achilles tendinosis using FHL autograft through single incision. Foot Ankle Int. 2009;30(3):197-204.

16. Mansur NSB, Matsunaga FT, Carrazzone OL, et al. Shockwave therapy plus eccentric exercises versus isolated eccentric exercises for Achilles insertional tendinopathy: a double-blinded randomized clinical trial. J Bone Joint Surg Am. 2021;103(14):1295-1302.

17. Rompe JD, Furia J, Maffulli N. Eccentric loading compared with shock wave treatment for chronic insertional Achilles tendinopathy: a randomized, controlled trial. J Bone Joint Surg Am. 2008;90(1):52-61.

18. Poutoglidou F, Drummond I, Patel A, Malagelada F, Jeyaseelan L, Parker L. Clinical outcomes and complications of the Zadek calcaneal osteotomy in insertional Achilles tendinopathy: a systematic review and meta-analysis. Foot Ankle Surg. 2023;29(4):298-305.

Suggested Reading

• Wapner KL, Pavlock GS, Hecht PJ, Naselli F, Walther R. Repair of chronic Achilles tendon rupture with flexor hallucis longus tendon transfer. Foot Ankle. 1993;14(8):443-449.
• Myerson MS, McGarvey W. Disorders of the Achilles tendon insertion and Achilles tendinitis. Instr Course Lect. 1999;48:211-218.