Retrocalcaneal Bursitis - A Complete Guide

1. Anatomy

The Retrocalcaneal Bursa

• Fibrocartilage on the anterior tendon surface
• Fibrocartilage on the opposing calcaneal surface
• The retrocalcaneal bursa (the space between these cartilaginous layers)
• A synovial-lined fat wedge (Kager's fat pad) that slides in and out of the bursa during ankle dorsiflexion/plantarflexion
• Underlying trabecular bone

• Goldman-Cecil Medicine, p. 2780

Bursae Around the Heel (Distinguishing Anatomy)

• Roberts and Hedges' Clinical Procedures in Emergency, p. 1210

2. Pathophysiology

1. Repeated microtrauma and friction
2. Inflammation of the bursa (retrocalcaneal bursitis)
3. With prolonged inflammation: degenerative changes and osteophyte formation within the tendon

A true Haglund deformity is a large exostosis off the posterosuperior aspect of the calcaneal tuberosity, located anterior to the Achilles tendon. The term is often incorrectly used to describe any posterior heel swelling.

• Campbell's Operative Orthopaedics 15th Ed, p. 4878

Systemic Associations

• Spondyloarthropathies (ankylosing spondylitis, psoriatic arthritis) - the entheseal organ is a hallmark site
• Rheumatoid arthritis
• Gout (urate crystal deposition in bursa)
• Calcium pyrophosphate dihydrate (CPPD) disease
• Ochronosis (homogentisic acid deposition)

3. Clinical Presentation

Symptoms

• Deep posterior heel pain - insidious onset, not typically from acute injury
• Pain worsened by ankle dorsiflexion (tightens Achilles against calcaneal exostosis)
• Pain when first arising in the morning (distinct from plantar fasciitis which is purely plantar)
• Difficulty wearing closed-back shoes
• Progressive fullness/swelling medial and lateral to the Achilles tendon

Pain only when wearing shoes may indicate pretendinous bursitis; pain on first arising in the morning is more consistent with retrocalcaneal bursitis.

• Campbell's Operative Orthopaedics, p. 4878

Signs

• Fullness and tenderness on direct palpation medial and lateral to the Achilles tendon (just anterior to it, over the calcaneal tuberosity)
• Fluid fluctuation test: clinician places thumb and index finger at either side of the insertional tendon; the other index finger presses repeatedly over the tendon, and fluctuation is perceived by the exploring fingers
• Increased pain with passive ankle dorsiflexion
• Gastrocsoleus contracture on examination (especially with knee in extension)
• Visible bony bump at the posterosuperior heel (Haglund prominence)

• Goldman-Cecil Medicine, p. 2780

4. Imaging

Plain Radiograph (Lateral Foot X-ray) - First-Line

• Standing lateral view is the standard
• Shows the Haglund deformity (prominent posterosuperior calcaneal tuberosity)
• Look for insertional Achilles spur, intratendinous calcification, and increased calcaneal pitch angle
• Note: the size of the Haglund deformity has not been statistically different between symptomatic patients and controls - clinical correlation is required

Lateral heel X-ray: Haglund deformity (box) and insertional Achilles spur (arrow) - Campbell's Operative Orthopaedics 15th Ed

Ultrasound

• Demonstrates bursal fluid (anechoic/hypoechoic collection anterior to Achilles tendon)
• Fusiform thickening and mixed echogenicity of the tendon if tendinopathy is concurrent
• Doppler shows hyperaemia within the tendon and Kager's fat pad in active inflammation
• Dynamic imaging is useful
• Cost-effective and widely available

MRI

• Rarely necessary for diagnosis of isolated retrocalcaneal bursitis, but useful when:
  • Extent of Achilles tendon degeneration needs quantification (for surgical planning)
  • Rule out partial tear
  • Confirm less than 50% intrasubstance degeneration (if Zadek osteotomy is being considered)
• Shows the Haglund syndrome triad: insertional Achilles tendinopathy + retrocalcaneal bursitis + posterosuperior calcaneal exostosis

MRI - Haglund syndrome triad: insertional tendinopathy (long arrow), retrocalcaneal bursitis (short arrow), Haglund exostosis () - Grainger & Allison's Diagnostic Radiology*

• Grainger & Allison's Diagnostic Radiology, p. 1000
• Miller's Review of Orthopaedics 9th Ed, p. 594

5. Differential Diagnosis

6. Management

Non-operative (First-Line, Try for at Least 3-6 Months)

• Activity restriction and shoe wear modification (open-back shoes to eliminate pressure on the posterior heel counter)
• Heel lift orthotics - reduce tension on the Achilles tendon and decrease impingement against calcaneus
• External heel padding / silicone pads
• Avoid high-heeled or stiff-backed footwear

• NSAIDs (oral or topical) - reduce inflammation
• Short course useful in acute flares

• Stretching of the gastrocsoleus complex - especially with knee in extension (Silfverskiöld test guides this)
• Eccentric training with heavy, slow resistance exercises
• Astym therapy
• Dry needling
• Dorsiflexion night splints to maintain a stretch overnight

• 3D walking boot for acute severe inflammation
• Short-leg walking cast for recalcitrant cases

⚠️ Corticosteroid injection should be avoided owing to the inherent risk of Achilles tendon rupture. Repeated steroid injection is strongly associated with Achilles tendon rupture.

• Miller's Review of Orthopaedics 9th Ed; Roberts and Hedges' Clinical Procedures in Emergency

• If corticosteroid is used (e.g., by an expert in non-tendinous disease), strict needle placement into the bursa (not tendon) is required, and repeat injections are to be avoided
• Platelet-rich plasma (PRP): The biologic rationale is sound, but clinical studies supporting efficacy in Achilles tendinopathy remain inconclusive - recently published studies have failed to demonstrate short- or long-term improvement over placebo
• Prolotherapy, autologous blood injection, sclerosing agents: evidence evolving

• Low-energy ESWT is an established option for chronic retrocalcaneal bursitis and insertional Achilles tendinopathy failing conservative treatment

• Campbell's Operative Orthopaedics 15th Ed, Box 88.1 (p. 4877)
• Goldman-Cecil Medicine, p. 2780

Operative Treatment (After Failure of Non-operative Management)

• Most common procedure
• Removal of the inflamed bursa + resection of the Haglund exostosis
• Can be performed via open or endoscopic (arthroscopic) approach
• Isolated endoscopic calcaneal exostectomy is suitable for recalcitrant retrocalcaneal bursitis without significant tendinosis
• Return to sport: approximately 67% at 8 months after exostectomy

• For later-stage disease when insertional tendinosis accompanies bursitis
• Tendon debridement with calcaneal exostectomy
• If >50% of the tendon footprint is debrided, augmentation with flexor hallucis longus (FHL) tendon transfer is typically required
• Large incisions and prolonged recovery with open techniques; 78% return to sport at 10 months after reconstruction

• Decompresses the Achilles insertion by reducing calcaneal pitch angle
• Best for patients with less than 50% intrasubstance tendinosis on MRI
• Minimally invasive / percutaneous approaches reduce wound complications and sural nerve injury risk
• A 2023 systematic review and meta-analysis (PMID: 37088671) confirms good clinical outcomes with this technique

• Addresses the gastrocnemius contracture component
• Reported success in both insertional and non-insertional tendinopathy
• Associated with continued plantarflexion weakness at 18 months post-operatively

• Campbell's Operative Orthopaedics 15th Ed, pp. 4879-4880
• Miller's Review of Orthopaedics 9th Ed, p. 594

7. Prognosis

• The majority of patients respond well to conservative management
• Surgical outcomes are generally favorable; most patients return to prior activity levels
• Risk of wound complications and sural nerve injury exist with open techniques - minimally invasive approaches reduce this risk
• Patients with systemic inflammatory disease (spondyloarthritis, RA, gout) require concurrent systemic management for best results

Summary Table

• Campbell's Operative Orthopaedics 15th Ed 2026, Chapter 88
• Miller's Review of Orthopaedics 9th Ed
• Goldman-Cecil Medicine (International Edition)
• Grainger & Allison's Diagnostic Radiology
• Roberts and Hedges' Clinical Procedures in Emergency Medicine
• Zadek osteotomy meta-analysis: Poutoglidou et al., Foot Ankle Surg 2023 [PMID: 37088671]
• General heel pain review: Morancie et al., Am Fam Physician 2025 [PMID: 41533410]

8. Radiological Measurement Tools

Fowler-Philip Angle

• The angle between the line connecting the posterior tuberosity to the posterior calcaneal process, and the line connecting the posterior tuberosity to the plantar surface
• Normal: <69° - angles >75° are associated with symptomatic Haglund deformity

Parallel Pitch Lines (PPL) Method

• A line is drawn parallel to the plantar calcaneal surface, passing through the posterior lip of the subtalar facet
• A second parallel line is drawn through the medial talar process (inferior surface)
• If the posterosuperior calcaneal process protrudes above the upper parallel pitch line, Haglund deformity is present

Calcaneal Pitch Angle

• Measured between the plantar surface of the calcaneus and the floor
• Increased calcaneal pitch angle has been associated with insertional Achilles tendinopathy (whereas Haglund size alone has not)

Important caveat

The size of the Haglund deformity in symptomatic patients has not been statistically different from control groups in studies. An insertional Achilles osteophyte, insertional calcification, or an increased calcaneal pitch angle has a stronger association with symptoms.

• Campbell's Operative Orthopaedics 15th Ed, p. 4878

9. Endoscopic (Tendoscopic) Surgery - In Depth

Surgical Technique (Endoscopic Calcaneoplasty)

• Two portals are used: a medial and a lateral portal, both placed just anterior to the Achilles tendon at the level of the superior calcaneal tuberosity
• Arthroscope inserted through one portal; shaver/burr through the other
• Sequence: debridement of inflamed retrocalcaneal bursa → identification of Haglund exostosis → bony resection with motorised burr
• The Achilles tendon is protected throughout
• The procedure can be performed under regional or local anaesthesia

Outcomes Data

Advantages of Endoscopic Over Open Surgery

• Significantly lower complication rate (4.1% vs. 15.5%)
• Faster return to daily activities and sport (nearly half the recovery time)
• Lower failure rate (1.2% vs. 6.0%)
• Avoids large posterior incision and its wound complications
• Reduced risk of sural nerve injury
• Better cosmesis

Complications of Open Surgery (worth knowing)

• Wound dehiscence and infection
• Sural nerve injury (most common nerve at risk)
• Prolonged recovery
• Skin necrosis (especially with posterior midline incisions)
• Achilles tendon weakening if excessive tendon debridement required

10. Zadek Osteotomy - More Detail

Mechanism

• A dorsal wedge of bone is removed from the calcaneus
• Closing the wedge rotates the posterior calcaneal tuberosity downward and forward
• This decompresses the retrocalcaneal space and reduces Achilles tendon insertion tension

Patient Selection

• Best for patients with <50% intrasubstance Achilles tendinosis on MRI
• High calcaneal pitch angle (the osteotomy directly corrects this deformity)
• Retrocalcaneal bursitis ± Haglund deformity without severe tendinosis

Outcomes

• Continued improvement in pain and function at 2 years (28-patient series, Campbell's)
• Minimally invasive / percutaneous approaches now described - fewer wound complications and lower sural nerve injury risk compared to open Zadek
• 2023 meta-analysis (PMID 37088671) confirms good outcomes; controversy remains over optimal patient selection

11. FHL Tendon Transfer (When Indicated)

Rationale

• FHL (flexor hallucis longus) is the workhorse augmentation tendon
• It runs in close anatomical proximity to the calcaneus (nearby musculotendinous unit)
• It provides strong, well-vascularized tissue
• The great toe loses some active plantarflexion strength, but this is generally well tolerated

Approach options

• Open FHL transfer: reliable, established technique; significant incision required
• All-endoscopic FHL transfer: technically demanding with steep learning curve; outcomes and complication rates comparable to percutaneous Achilles repair; minimises wound complications

12. Endoscopic Gastrocnemius Recession

• Open vs. endoscopic approaches both effective
• Endoscopic: fewer wound complications (1 dehiscence vs. 10 complications in open group in one comparative series - Harris et al.)
• Associated with persistent plantarflexion weakness at 18 months
• Tendoscopic gastrocnemius tendon recession (Phisitkul technique): prospective study of 320 patients showed improvement in ankle dorsiflexion, pain, and validated outcome scores at 1 year

13. Specific Populations

Athletes

• High demand for return to sport - endoscopic approach preferred
• Eccentric training programs (e.g., Alfredson protocol) should be trialled for at least 12 weeks before surgery is considered
• Haglund deformity ("pump bump") common in distance runners and those in stiff-backed footwear (the condition was classically described in women wearing high-heeled "pump" shoes)

Spondyloarthritis / Inflammatory Arthropathy

• Retrocalcaneal bursitis in spondyloarthritis requires systemic disease-modifying treatment (NSAIDs, biologics targeting TNF-α or IL-17) in addition to local measures
• Corticosteroid injection of the bursa may be used more liberally in inflammatory arthritis (less concern about tendon rupture when the primary pathology is synovitis rather than tendinosis)
• Bilateral presentation strongly suggests a systemic cause

Paediatrics (Sever's Disease vs. Retrocalcaneal Bursitis)

• True retrocalcaneal bursitis is rare in children
• Posterior heel pain in children aged 7-10 years is most commonly Sever's disease (calcaneal apophysitis) - traction injury at the apophysis
• Self-limited; treat with rest, ice, heel pads; radiographs not needed unless another diagnosis is suspected

Fluoroquinolone Use

• Quinolone antibiotics (e.g., ciprofloxacin, levofloxacin) predispose to Achilles tendinopathy and rupture - can occur during or up to weeks after therapy
• Immediate discontinuation required if recognised
• Retrocalcaneal bursitis emerging during fluoroquinolone therapy should prompt drug cessation

14. Physical Therapy Protocols (Detailed)

Phase 1 - Acute Phase (Weeks 1-4)

• Rest and activity modification (avoid aggravating dorsiflexion loading)
• Ice (15-20 min, 3-4x daily)
• NSAIDs / topical anti-inflammatories
• Heel lift in shoe (raises calcaneus, reduces dorsiflexion impingement)
• Night splint if morning pain significant
• Boot immobilisation for severe acute flares

Phase 2 - Subacute / Loading Phase (Weeks 4-12)

• Eccentric heel drops (the cornerstone of Achilles tendinopathy rehab):
  • Patient stands on the edge of a step, rises on toes bilaterally, then lowers slowly on the affected leg only
  • 3 sets × 15 reps, twice daily
  • Initially with straight knee (targets gastrocnemius), then with bent knee (targets soleus)
• Heavy slow resistance (HSR) training: shown equivalent or superior to eccentric-only in clinical trials for tendinopathy
• Gastrocnemius and soleus stretching
• Astym soft tissue mobilisation
• Dry needling of the posterior calf chain

Phase 3 - Sport/Activity Return (Weeks 12+)

• Progressive plyometric loading
• Sport-specific drills
• Footwear optimisation (appropriate heel counter, cushioning)
• ESWT can be added for recalcitrant cases at any phase from 6 weeks onwards

15. Complete Management Algorithm

POSTERIOR HEEL PAIN
        ↓
Clinical Examination
  ├─ Mediolateral tenderness anterior to Achilles → Retrocalcaneal bursitis
  ├─ Tenderness over tendon at insertion → Insertional Achilles tendinopathy
  └─ Superficial tenderness with shoes only → Pretendinous bursitis
        ↓
X-ray (standing lateral)
  ├─ Haglund deformity present? → Haglund syndrome likely
  ├─ Insertional spur / calcification? → Tendinopathy component
  └─ Normal? → Consider systemic cause, US/MRI
        ↓
Systemic features? (bilateral, SpA, RA, gout, fluoroquinolone use)
  YES → Address systemic disease concurrently
  NO → Mechanical/overuse pathway
        ↓
NON-OPERATIVE (minimum 3-6 months)
  • Heel lifts, open-back shoes, padding
  • NSAIDs (short course)
  • Eccentric / HSR exercise programme
  • Night splint, ESWT for chronic cases
  • Boot for acute severe inflammation
  ⚠ Avoid corticosteroid injection near Achilles tendon
        ↓
FAILED CONSERVATIVE?
        ↓
MRI to assess tendinosis extent (<50% vs >50% involvement)
        ↓
<50% tendinosis                    >50% tendinosis
     ↓                                   ↓
Endoscopic calcaneoplasty         Debridement + exostectomy
± Zadek osteotomy                 + FHL transfer (augmentation)
(preferred - faster recovery,     (open or endoscopic)
lower complications)

Quick Reference Summary

• Endoscopic vs. open surgery: Alessio-Mazzola et al., KSSTA 2021 [PMID 33216187] - 1,260 ankles, Level IV systematic review
• Surgical treatment review: Yuen et al., Cureus 2022 [PMID 36060327]
• Zadek osteotomy meta-analysis: Poutoglidou et al., Foot Ankle Surg 2023 [PMID 37088671]
• Campbell's Operative Orthopaedics 15th Ed 2026, Chapters 55 (Tendoscopy) and 88 (Insertional Achilles)
• Miller's Review of Orthopaedics 9th Ed, Chapter 6