Achilles Tendon Insertion Research Articles

Anatomical research of positional relationship between protective channel and sural nerve during Achilles tendon repair using channel assisted minimally invasive repair technique

To evaluate the positional relationship between protective channel and sural nerve while treating acute Achilles tendon rupture with channel assisted minimally invasive repair (CAMIR) technique based on anatomical observations of cadaver specimens. Twelve adult cadaveric lower limb specimens (6 left, 6 right) were utilized. A CAMIR device was implanted at a distance of 4 cm from the proximal end of the specimen to the Achilles tendon insertion. The skin was incised along the tendon's medial side, the sural nerve was dissected, and the positional relationship with the protective channel was observed. The distance from the sural nerve-Achilles tendon intersection to the calcaneal insertion, the vertical distance between protective channel and the calcaneal insertion, and the horizontal distance between the sural nerve and protective channel were measured by using vernier caliper. Anatomical examination demonstrated a variable positional relationship between the sural nerve and protective channel, with the sural nerve positioned above (8 specimens) or below (4 specimens) the protective channel. The distance from the sural nerve-Achilles tendon intersection to the calcaneal insertion was (105.67±14.94) mm, the vertical distance between protective channel and the calcaneal insertion was (93.20±9.57) mm, and the horizontal distance between the sural nerve and protective channel was (0.31±0.14) mm. The use of CAMIR technique for the treatment of acute Achilles tendon rupture can effectively avoid iatrogenic injury to the sural nerve.

Pivotal role of the synovioentheseal complex in the imaging of arthritis and rheumatic diseases

Imaging plays a key role in the diagnosis and management of rheumatic diseases. Although joints and periarticular tissue are commonly involved in rheumatic diseases, entheses further away from joints, such as in the Achilles tendon or plantar fascia insertion onto the calcaneus, as well as skin and subcutaneous tissue, are among other -sometimes overlooked- targets. The link of enthesitis, which describes inflammation at the insertions of ligaments, tendons, or joint capsules, with spondyloarthritis (SpA) was established just before the turn of the century as a characteristic feature based on imaging studies with histopathological correspondence. To highlight the association between enthesitis and synovitis in SpA, the anatomical unit of the “synovioentheseal complex” (SEC) and the concepts of “functional enthesis” and “articular enthesis,” apart from the better known “insertional enthesis,” were introduced to encompass other inflammatory lesions associated with SpA. Studies from the last two decades revealed the involvement of the SEC in rheumatic and non-rheumatic disorders with different pathogeneses. Although such involvement is sometimes distinctive, it does not necessarily point to a specific diagnosis at other times. Nevertheless, the potential of SEC inflammation in the differentiation of SpA from other forms of arthritis remains important. The purpose of this review was to provide essential information concerning the involvement of the SEC in the diagnosis of rheumatic diseases and arthritis, focusing on imaging characteristics.

Relationship Between Ultrasound and Physical Examination in the Assessment of Enthesitis in Patients With Spondyloarthritis: Results From the DEUS Multicenter Study.

The study objectives were (i) to explore the agreement between the Outcome Measures in Rheumatology (OMERACT) ultrasound lesions of enthesitis and physical examination in assessing enthesitis in patients with spondyloarthritis (SpA) and (ii) to investigate the prevalence and clinical relevance of subclinical enthesitis in this population. Twenty rheumatology centers participated in this cross-sectional study. Patients with SpA, including axial spondyloarthritis (axSpA) and psoriatic arthritis (PsA), underwent both ultrasound scan and physical examination of large lower limb entheses. The OMERACT ultrasound lesions of enthesitis were considered, along with a recently proposed definition for "active enthesitis" by our group. Subclinical enthesitis was defined as the presence of "active enthesitis" in ≥1 enthesis in patients with SpA without clinical enthesitis (ie, number of positive entheses on physical examination and Leeds Enthesitis Index score = 0). A total of 4,130 entheses in 413 patients with SpA (224 with axSpA and 189 with PsA) were evaluated through ultrasound and physical examination. Agreement between ultrasound and physical examination ranged from moderate (ie, enthesophytes) to almost perfect (ie, power Doppler and "active enthesitis"). Patellar tendon entheses demonstrated the highest agreement, whereas Achilles tendon insertion showed the lowest. Among 158 (38.3%) of 413 patients with SpA with clinical enthesitis, 108 (68.4%) exhibited no "active enthesitis" on ultrasound. Conversely, of those 255 without clinical enthesitis, 39 (15.3%) showed subclinical enthesitis. Subclinical enthesitis was strongly associated with local structural damage. However, no differences were observed regarding the demographic and clinical profiles of patients with SpA with and without subclinical enthesitis. Our study underscores the need for a comprehensive tool integrating ultrasound and physical examination for assessing enthesitis in patients with SpA.

Biomechanical Changes to the Hindfoot After Zadek Osteotomy.

Insertional Achilles tendinopathy (IAT) is a common source of heel pain in active adults and athletes. The Zadek osteotomy (ZO) is a calcaneal dorsal closing wedge osteotomy that has demonstrated clinical success as a treatment for IAT, purported to favorably improve tendon mechanics, decrease impingement, and decrease pressure within the retrocalcaneal bursa. The present study aims to evaluate the biomechanical effects of ZO on Achilles strain, position of the Haglund prominence relative to the Achilles insertion, and retrocalcaneal pressure. The ZO was performed on 10 fresh-frozen foot and ankle mid tibia-fibula cadaveric specimens. An osteotomy was performed using a 1-cm dorsal closing wedge procedure secured with a 7.0 mm cannulated screw. Point pressure sensor catheters and differential variable reluctance transducers were used to measure the retrocalcaneal pressure and Achilles strain, respectively, pre- and postosteotomy. Paired t-tests were utilized to detect statistical differences (P < .05). After the ZO, the Haglund prominence was translated 9.9 mm anteriorly with respect to the insertion of the Achilles (P < .05) and the Achilles tendon insertion was translated 3.4 mm proximally (P < .05). The ratio of calcaneal length to greater tuberosity length, the X/Y ratio, increased from 2.56 to 3.52 with the osteotomy (P < .05). At maximum dorsiflexion, retrocalcaneal pressure decreased from 117 to 66 mm Hg (44%, P = .018). The Achilles strain changed from 0.00362 to 0.00436 in the anterior fibers (P = .484) and changed from 0.00467 to 0.00283 in the posterior fibers (P = .088). Biomechanical testing in a cadaveric model demonstrates that the ZO decreased retrocalcaneal pressure, shifted the Achilles tendon insertion proximally, increased the X/Y ratio of the calcaneus, and did not significantly change the strain of the Achilles tendon. Despite the clinical success demonstrated in recent literature, there are no biomechanical studies describing the effect of the ZO on the biomechanics of the hindfoot, and the mechanism of symptom relief of the ZO for IAT is not well understood. The present study measures two potential ZO effects relative to Haglund prominence by measuring retrocalcaneal pressure and displacement of the Achilles tendon with respect to the Haglund prominence, and measures one ZO effect relative to calcification of the tendon by measuring the Achilles tendon strain.

Analysis of Calcaneal Avulsion Fractures Treated Surgically and Nonsurgically: A Retrospective Multicenter Study.

Calcaneal avulsion fractures (CAvFs) at the Achilles tendon insertion are among the more challenging fractures to treat. Although rare, they often require reoperation. The optimal treatment, including nonsurgical procedures and better implants for surgical procedures in the treatment of CAvFs, remains to be established. Therefore, our study aimed to (1) perform a descriptive evaluation of CAvFs, including cases managed nonsurgically, and (2) assess surgical procedures, including the incidence of complications and reoperation for surgically treated CAvFs. In this multicenter retrospective study, we collected data of patients with CAvFs treated at 9 hospitals from 2012 to 2022. We performed a descriptive study of CAvFs and compared postoperative complications and reoperation rates for multiple surgical techniques and implants. The size of the bone fragments was quantified. The data of 70 patients with CAvFs were analyzed; 20 patients were treated nonsurgically, and 50 were treated surgically. The mean age of patients was 68.5 years; 67% of the patients were female. Nineteen percent of the patients had diabetes, and 19% had osteoporosis. The incidence of postoperative complications was 30%, with infection in 14%, necrosis in 26%, and loss of reduction in 18%. The reoperation rate was 22%. Surgical techniques with use of cannulated cancellous screws were performed in 80% of the surgical cases. Cannulated cancellous screw (CCS) fixation alone resulted in a reoperation rate of 35%, whereas additional augmentation, including washers with CCS fixation, resulted in a reoperation rate of 10%. CCS fixation was successfully performed, although suture anchors were used in some cases with smaller fragments. CAvFs occurred more frequently in older women and had a high rate of postoperative complications. A combination of CCS with augmentation was more effective at reducing postoperative complications than CCS fixation alone, even when the bone fragment size was small. Therapeutic Level III. See Instructions for Authors for a complete description of levels of evidence.

Significant functional impairment and disability in individuals with psoriatic arthritis and Achilles tendon pain: a cross-sectional observational study

The Achilles tendon (AT) insertion is the most common site of enthesitis in psoriatic arthritis (PsA). The structure and function of the AT in PsA, and the prevalence of mid-portion pathology, is unknown. To compare the structure and function of the AT in people with PsA with self-reported AT pain (PsA + AT), PsA without self-reported AT pain (PsA-AT) and healthy controls. A cross-sectional, observational study was conducted. The ATs were assessed by clinical and US examination (B-mode and Power Doppler), performance-based testing (bilateral heel raise test (HRT) and 10 m walk test), and patient-reported outcome measures (PROMs) (including the Victorian Institute of Sport Assessment-Achilles [VISA-A]). Between-group differences were described using descriptive statistics, Chi-squared testing, parametric (1-way ANOVA) and non-parametric (Mann-Whitney or Kruskal-Wallis) testing. 22 PsA (11 per group) and 11 healthy control participants who were comparable in terms of sex, age, and BMI (PsA-AT = longer PsA disease duration) were recruited. VISA-A scores were significantly worse in the PsA + AT group compared to the PsA-AT group and healthy controls (p < 0.001). Inflammatory US features were significantly more prevalent in the PsA + AT group (p < 0.001). Mid-portion AT pathology was observed in the PsA + AT group, irrespective of entheseal disease. Clinical examination alone missed 5/7 cases of ‘active’ US-confirmed AT enthesitis. AT functional deficits were significant in the PsA + AT group and both PsA groups had lower HRT repetition rates and walked slower compared to healthy controls. Less than 1/3 of the PsA + AT group had received podiatry or physiotherapy care. Significant differences in the structure and function of the AT in PsA were noted. Despite management in line with current guidance, AT pain appears to persist and can result in severe functional impairment.

Achilles tendon debridement, calcaneoplasty and double-row tendon footprint reconstruction improve ankle function and athletic performance in patients with insertional Achilles tendinopathy

BackgroundInsertional Achilles tendinopathy is a frequent condition among physically active individuals. Extensive intratendinous pathologies may require partial tendon detachment, debridement and reconstruction of the tendon footprint. Positive functional outcomes are reported after the procedure, but literature on postoperative sport function is limited. MethodsPre- and postoperative sports capability and ankle function were assessed in 25 patients undergoing Achilles tendon debridement and double-row footprint reconstruction. ResultsThe mean VAS score for pain during sport decreased significantly from 7.4 (SD, 2.5) to 1.2 (SD, 2.0) postoperatively (p < 0.001). Sports ability and subjective fitness levels increased significantly from 3.6 (SD 3.0) and 3.5 (2.2) to 8.8 (2.4) and 8.8 (2.2), respectively (p < 0.001). A trend from high-impact sports to low-impact sports was observed postoperatively. The subjective surgical outcome was good or excellent in 96 %. ConclusionOur study shows improvement in postoperative sports ability and high patient satisfaction after insertional Achilles tendon debridement, and double-row tendon footprint reconstruction. Level of EvidenceLevel IV – retrospective case series.

Biomechanical consequences of Zadek osteotomy in insertional achilles tendinopathy: A virtual surgical simulation study

BackgroundThe Zadek osteotomy modified by Taylor (ZO) is a surgical technique used to treat insertional Achilles tendinopathy (IAT) by reducing the heel's prominence and elevating the Achilles tendon insertion. This study aims to analyze the biomechanical consequences of IAT after ZO using a virtual surgical simulation with a specific software. MethodsA retrospective analysis of 20 wtbearing computed tomography (WBCT) scans of IAT patients was conducted. Using Disior's BonelogicTM software, 3D models were created from WBCT images. Virtual ZO was performed on these models, and various biomechanical parameters were measured before and after the virtual osteotomy. ResultsThe virtual ZO showed significant statistical differences in the average of the calcaneal length (p < 0.001), Fowler Philips angle (p < 0.001), calcaneal pitch (p < 0.001), and the sagittal talocalcaneal angle (p < 0.001). ConclusionsThe virtual ZO analysis suggests that this procedure can decrease the Fowler Philips angle, shorten the calcaneus, modifying specifically the sagittal alignment. Level of evidenceIV; case series.

A novel and efficient murine model for investigating tendon-to-bone healing

BackgroundTendon-to-bone healing is a critical challenge in sports medicine, with its cellular and molecular mechanisms yet to be explored. An efficient murine model could significantly advance our understanding of this process. However, most existing murine animal models face limitations, including a propensity for bleeding, restricted operational space, and a steep learning curve. Thus, the need for a novel and efficient murine animal model to investigate the cellular and molecular mechanisms of tendon-to-bone healing is becoming increasingly evident.MethodsIn our study, forty-four 9-week-old male C57/BL6 mice underwent transection and reattachment of the Achilles tendon insertion to investigate tendon-to-bone healing. At 2 and 4 weeks postoperatively, mice were killed for histological, Micro-CT, biomechanical, and real-time polymerase chain reaction tests.ResultsHistological staining revealed that the original tissue structure was disrupted and replaced by a fibrovascular scar. Although glycosaminoglycan deposition was present in the cartilage area, the native structure had been destroyed. Biomechanical tests showed that the failure force constituted approximately 44.2% and 77.5% of that in intact tissues, and the ultimate tensile strength increased from 2 to 4 weeks postoperatively. Micro-CT imaging demonstrated a gradual healing process in the bone tunnel from 2 to 4 weeks postoperatively. The expression levels of ACAN, SOX9, Collagen I, and MMPs were detected, with all genes being overexpressed compared to the control group and maintaining high levels at 2 and 4 weeks postoperatively.ConclusionsOur results demonstrate that the healing process in our model is aligned with the natural healing process, suggesting the potential for creating a new, efficient, and reproducible mouse animal model to investigate the cellular and molecular mechanisms of tendon-to-bone healing.Graphical abstract

Histological differences in cartilage layer growth at various tendon and ligament insertions in rabbits.

Objectives: Histological differences in cartilage layer growth in Achilles tendon (AT), quadriceps tendon (QT), patellar tendon (PT), and anterior cruciate ligament (ACL) insertion are unclear. Therefore, this study aimed to investigate the differences in cartilage layer growth in AT, QT, PT, and ACL insertions. Materials and Methods: Forty-eight male Japanese white rabbits were used. Six animals were euthanized at different stages (day 1 and 1, 2, 4, 6, 8, 12, and 24 weeks). Safranin O-stained glycosaminoglycan (GAG) production area, chondrocyte count, and insertion width were investigated. Results: A two-way analysis of variance (ANOVA) revealed a significant difference in the main effects of time and insertion for all parameters. In addition, the time × insertion interaction was significant. Multiple comparisons showed a significant difference between the ACL insertion and all other variables; however, the GAG production area was not significantly different for the QT, PT, and AT insertions. AT insertions were significantly different from all other groups; however, the number of chondrocytes and insertion width were not significantly different for ACL, QT, and PT insertions. Conclusion: Cartilage layer growth differed between the AT, QT, PT, and ACL insertions. The differences between the insertions may also be due to the differences in their structures, locations, and mechanical environments.

Measuring Ultrasonographic Thickness of the Achilles Tendon Insertion Is Less Reliable Than the Midportion in Healthy Tendons and Patients With Tendinopathy.

Ultrasound is the preferred imaging method in the diagnostic process of Achilles tendinopathy (AT). Ultrasound tissue characterization (UTC) is a frequently used, standardized and valid method to assess tendon geometry in AT patients. It is unknown whether UTC is reliable for measuring Achilles tendon thickness. The aim of the study was to assess intra- and inter-rater reliability of Achilles tendon thickness measurements using UTC in both asymptomatic individuals and patients with AT, and to evaluate if the reliability of thickness measurements differs between the midportion and insertional area. Exactly 50 patients with AT and 50 asymptomatic individuals were included. Using the conventional US and standardized UTC procedure maximum thickness was measured in the midportion and insertion region. To determine inter- and intra-rater reliabilities, the intraclass correlation coefficient (ICC) was used. The ICC values for inter- and intra-rater reliability were classified as "excellent," for the AT group (0.93 [95% CI: 0.88-0.96] and 0.95 [0.92-0.97]) and asymptomatic participants (0.91 [0.87-0.94] and 0.94 [0.92-0.96]). The reliability of measuring tendon thickness in the midportion region was "excellent," with both inter-rater (0.97 [0.95-0.98]) and intra-rater (0.98 [0.96-0.99]) ICC values indicating high levels of agreement. In the insertional region, ICC values for inter-rater (0.79 [0.69-0.87]) and intra-rater (0.89 [0.84-0.93]) reliability were "moderate to good." We showed excellent reliability for measuring the US thickness of the midportion and good reliability of measuring the insertional region in patients with AT. Significantly lower ICCs were observed for the reliability of thickness measurements in the insertional region when compared with the midportion.

Murine Hind Limb Explant Model for Studying the Mechanobiology of Achilles Tendon Impingement.

Tendon impingement upon bone generates a multiaxial mechanical strain environment with markedly elevated transverse compressive strain, which elicits a localized fibrocartilage phenotype characterized by accumulation of glycosaminoglycan (GAG)-rich matrix and remodeling of the collagen network. While fibrocartilage is a normal feature in impinged regions of healthy tendons, excess GAG deposition and disorganization of the collagen network are hallmark features of tendinopathy. Accordingly, impingement is clinically recognized as an important extrinsic factor in the initiation and progression of tendinopathy. Nevertheless, the mechanobiology underlying tendon impingement remains understudied. Prior efforts to elucidate the cellular response to tendon impingement have applied uniaxial compression to cells and excised tendon explants in vitro. However, isolated cells lack a three-dimensional extracellular environment crucial to mechanoresponse, and both in vitro and excised explant studies fail to recapitulate the multiaxial strain environment generated by tendon impingement in vivo, which depends on anatomical features of the impinged region. Moreover, in vivo models of tendon impingement lack control over the mechanical strain environment. To overcome these limitations, we present a novel murine hind limb explant model suitable for studying the mechanobiology of Achilles tendon impingement. This model maintains the Achilles tendon in situ to preserve local anatomy and reproduces the multiaxial strain environment generated by impingement of the Achilles tendon insertion upon the calcaneus during passively applied ankle dorsiflexion while retaining cells within their native environment. We describe a tissue culture protocol integral to this model and present data establishing sustained explant viability over 7 days. The representative results demonstrate enhanced histological GAG staining and decreased collagen fiber alignment secondary to impingement, suggesting elevated fibrocartilage formation. This model can easily be adapted to investigate different mechanical loading regimens and allows for the manipulation of molecular pathways of interest to identify mechanisms mediating phenotypic change in the Achilles tendon in response to impingement.

Sagittal Orientation and Variabilities of the Anatomical Insertional Footprint of the Achilles Tendon: A Cadaveric Study

Category: Hindfoot; Sports Introduction/Purpose: New surgical techniques for Achilles tendon insertional pathology are evolving rapidly. Whether via open surgery, minimally invasive, or endoscopic approaches, more information about the Achilles' insertional footprint is needed to help surgeons with decision making. This study investigated the footprints of the Achilles insertion in sagittal orientation to delineate the anatomical landmarks, safe zones for bone resection3-down surgeries in treating insertional Achilles tendinopathies. Methods: Twenty fresh frozen cadavers were selected excluding insertional Achilles tendon pathology on lateral view x-rays. The calcanei were dissected maintaining the Achilles tendon insertion intact. Dimensions of the posterior tuberosity were recorded and marked to plan for three sagittal cuts (medial, middle, and lateral) (Fig 1 A). Using an oscillating saw (Fig 1 B.), the posterior tuberosity was cut into four pieces (Fig 1 C,E). A trapezoid shape (Fig 1 D) was reconstructed demonstrating relative location of the footprints of the Achilles insertion compared to the boundaries of the tuberosity on each piece (A, most superior point in the posterior tuberosity; B, most superior point in the Achilles insertion; C, most inferior point in the Achilles insertion; D, most inferior point in the posterior tuberosity). Data regarding footprints of the Achilles tendon insertion in the sagittal orientation was analyzed and compared within each trapezoid region and among different regions. Results: AB (calcaneal tuberosity tip to the upper limit of the Achilles insertion) was shortest at the medial cut (9.35mm) and longest at the lateral cut (12.15mm). However, the tendon thickness at the insertion (the distance from the proximal to the distal limits) represented by BC was shortest at the lateral cut (13.19mm) and longest at the middle cut (14.04mm). AD, the distance from the highest to the lowest point of the calcaneal tuberosity, was the longest at the middle cut (41.20mm). AB:BC ratio was highest at the lateral cut and lowest at the medial cut, indicating the safe amount of bone to be resected at the Achilles insertion. Tendon thickness relative to the whole calcaneal tuberosity (BC:CD) was highest at the medial wall (Table1). Conclusion: The sagittal orientation and variability of the Achilles tendon insertion is an under-studied topic in the literature. It needs to be addressed given recent trends towards minimally invasive procedures in treating insertional Achilles pathology. This study precisely delineated the footprint in each region of the insertion by creating a trapezoid pattern to compare the coordinates across these areas. This could lead to future three-dimensional reconstruction of the Achilles insertional footprint and patient- specific instrumentation software directed towards optimizing the management of Insertional Achilles pathology.

Clinical Outcomes and Complications of the Zadek Calcaneal Osteotomy in Insertional Achilles Tendinopathy: A Systematic Review and Meta-analysis

Category: Hindfoot; Ankle Introduction/Purpose: Insertional Achilles Tendinopathy (IAT) is a degenerative process at the insertion of Achilles tendon onto the calcaneal tuberosity that often coexists with retrocalcaneal bursitis and Haglund’s deformity. The Zadek osteotomy, a dorsal closing wedge osteotomy of the calcaneus, has been described as a treatment option in patients with IAT that have failed conservative management. The aim of this study was to evaluate the clinical outcomes and the complications of the Zadek for the management of IAT. Methods: PubMed, EMBASE and Cochrane Central Register of Controlled Trails (CENTRAL) were searched for all studies to November 2022. PRISMA guidelines were followed. The overall estimates of effect were presented as Weighted Mean Difference (WMD) and 95% confidence intervals (CIs). Meta-analysis was conducted using the Review Manager Software (RevMan, Version 5.4). Results: Ten studies with 232 patients were included. The AOFAS (American Orthopaedic Foot and Ankle Society) Ankle- Hindfoot Score and the VISA-A score (Victorian Institute of Sports of Australia-Achilles score) were significantly improved after the Zadek osteotomy (p &lt; 0.00001). Pain levels were also significantly reduced (p &lt; 0.00001). There were a total of 22 complications reported in the included studies and they were all considered minor. The most common complications were superficial wound infection and sural nerve paraesthesia. Conclusion: The Zadek osteotomy is a safe and effective procedure for patients with IAT. The osteotomy improves pain levels and functions and is associated only with minor complications and a low complication rate. There are no well-designed randomized controlled trials in the literature assessing the outcomes of a Zadek osteotomy against alternate surgical treatments and future research should focus on this.

No Loss of Strength After Insertional Achilles Tendon Reconstruction With Single-Anchor or Double-Row Repair

Many different types of surgical repair for insertional Achilles tendinosis have been described. Strength after surgery is an essential factor for patient function and satisfaction. A retrospective series of patients that underwent surgery for insertional Achilles tendon surgery were contacted to come in for prospective strength testing, with the tester blinded to the type of surgery performed. Thirty-seven patients came in for testing, 24 with a single-anchor repair and 13 with a double-row repair. Strength of plantarflexion was tested at 60°/s and 120°/s and was compared. First each operative leg was compared to the nonoperative leg as a control. Then the percentage change, or symmetry, from the control leg to the operative leg was compared between those with a single-anchor and double-row repair. Satisfaction was also assessed with a simple questionnaire and compared the types of repair. The results demonstrated there was no statistically significant change in strength after surgery compared to the nonoperative leg, and there was no difference in limb symmetry between types of repair. Similarly, there was no difference between the groups in satisfaction. Our study showed that there is, on average, no loss of strength after insertional Achilles tendon surgery at an average follow-up of nearly 2 years, regardless of type of repair.

Haglund's Disease with Clinical and Radiological Findings: 3 Case Reports

Objective: Haglund's Deformity is a variation of the posterosuperior region enlargement of the Os Calcaneus (OC) in the form of exostosis. It is associated with Haglund's Disease (HD), which encompasses Achilles tendinitis, retrocalcaneal bursitis, supra calcaneal bursitis, and inflammation of the Kager fat pad. Diagnosis is based on clinical findings and radiological methods, such as lateral ankle radiographs, Computed Tomography (CT), and Magnetic Resonance Imaging (MRI). This study aims to present three cases of ankle pain diagnosed with HD using radiological imaging. The mean age of our cases was 44.6 years, with two females and one male. Patients commonly present with complaints of pain and swelling behind the heel. Results: Physical examination revealed pain and tenderness upon palpation over the left OC and Achilles tendon insertion. Radiological examination showed osseous protrusion in the posterosuperior part of the OC, indicating Haglund's Deformity. Edema was observed at the bony prominence of the posterosuperior OC, Kager fat pad, and heel area. The treatment plan for all three patients included leg rest splint, anti-inflammatory medication, and physical therapy. Conclusion: In cases of heel pain where traumatic events such as acute fractures are ruled out, MRI should be performed, and Haglund's Syndrome should be investigated if osseous protrusion in the posterosuperior calcaneus is observed on radiographs, along with other findings suggestive of HS.

Minimally invasive surgeries for insertional Achilles tendinopathy: A commentary review.

Studies of minimally invasive surgery for insertional Achilles tendinopathy are limited. To establish this surgery, the following techniques must be minimally invasive: Exostosis resection at the Achilles tendon insertion, debridement of degenerated Achilles tendon, reattachment using anchors or augmentation using flexor hallucis longus (FHL) tendon transfer, and excision of the posterosuperior calcaneal prominence. Studies on these four perspectives were reviewed to establish minimally invasive surgery for insertional Achilles tendinopathy. Techniques for exostosis resection were demonstrated in one case study, where blunt dissection around the exostosis was performed, and the exostosis was resected using an abrasion burr under fluoroscopic guidance. Techniques for debridement of degenerated Achilles tendon were demonstrated in the same case study, where the space left after resection of the exostosis was used as an endoscopic working space, and the degenerated Achilles tendon and intra-tendinous calcification were debrided endoscopically. Achilles tendon reattachment techniques using suture anchors have been demonstrated in several studies. However, there are no studies on FHL tendon transfer techniques for Achilles tendon reattachment. In contrast, endoscopic posterosuperior calcaneal prominence resection is already established. Additionally, studies on ultrasound-guided surgeries and percutaneous dorsal wedge calcaneal osteotomy as minimally invasive surgery were reviewed.

Myofascial stiffness of plantar fascia and Achilles tendon in individuals with plantar fasciopathy: An observational cross-sectional study

BackgroundAssessment of myofascial tissue stiffness have a role in identifying physical impairments in plantar fasciopathy (PF). It is still unclear which specific functional and tissue differences exist between individuals with PF. AimTo compare myofascial stiffness of plantar fascia, Achilles tendon, and triceps surae between symptomatic and asymptomatic limbs in individuals with PF and between individuals with and without PF. MethodsThirty nine individuals diagnosed with PF and individuals with no history of PF were recruited. Myofascial stiffness of the plantar fascia, Achilles tendon, and triceps surae, range of motion, and clinical tests were performed. Mean difference (MD) and 95% confidence interval (CI) were calculated. ResultsIndividuals with PF showed lower mean stiffness in Achilles tendon insertion (MD = −1.00 N/mm; 95%CI: -1.80,-0.21) on the symptomatic limb compared to the corresponding symptomatic limb in control group, a lower mean stiffness in plantar fascia (MD = −0.16 N/mm; 95%CI: -0.30, −0.01) on the symptomatic limb compared to asymptomatic limb, and a lower mean stiffness in the region 3 cm above the Achilles tendon insertion (MD = −0.79; 95%CI: -1.59, −0.00) compared to control. Individuals with PF showed fewer repetitions in heel rise test (MD = −3.97 reps; 95%CI: -5.83, −2.12) and in the step-down test (MD = −5.23 reps; 95%CI: -7.02, −3.44) compared to control. ConclusionsIndividuals with PF present reduced stiffness in Achilles tendon insertion and plantar fascia. The reduced stiffness was more evident in Achilles tendon in individuals with PF compared to individuals without PF. Individuals with PF showed lower performance in clinical tests.

P072 Significant functional impairment and disability in individuals with psoriatic arthritis and Achilles tendon pain

Abstract Background/Aims Enthesitis is a hallmark clinical feature of psoriatic arthritis (PsA) with the most commonly affected site being the Achilles tendon (AT) insertion into the posterior calcaneum. There is overlap in the clinical and ultrasound (US) pathological presentation of Achilles enthesitis and Achilles tendinopathy, however their treatment guidelines differ significantly. AT pain in PsA is complex, with the potential interplay of mechanobiology and inflammation. The aim of this study was to assess the structure and function of the AT in individuals with PsA to inform the future development of a non-pharmacological intervention. Methods A single-centre, cross-sectional observational study was conducted. People with PsA with (PsA+AT) and without (PsA-AT) AT pain were age and sex-matched with healthy controls (n = 11 per group). AT structure and function were assessed by clinical examination (Leeds Enthesitis Index and AT tendinopathy tests), B-mode and Power Doppler (PD) US, the Victorian Institute of Sports Assessment - Achilles (VISA-A) questionnaire, the bilateral heel raise test and 10-metre walk test (10MWT). Patient-reported outcome measures were used to evaluate local and global disease activity, impact, and quality of life. Group membership associations and between-group differences for domains of interest were evaluated using Pearson’s Chi-squared, one-way ANOVA, Mann-Whitney or Kruskal-Wallis tests. Results All groups were comparable in terms of sex, age and BMI. PsA disease duration was longer in the PsA-AT group (mean [SD], 20.1 years [13.1]) compared to the PsA+AT group (7.4 [6.3]). Structural changes at the enthesis on US were detected in all groups; however inflammatory features were significantly more prevalent in the PsA+AT group (p&amp;lt;0.001). PD signal was only detected in the PsA+AT group. Mid-portion and myotendinous AT pathology, including diffuse thickening, altered echogenicity and partial tears were also present, irrespective of the presence of enthesitis. PsAID-12 and HAQ-DI scores were significantly worse in the PsA+AT compared to the PsA-AT group (p=0.018 and p=0.001, respectively). The PsA+AT group walked slower (mean=17.89 seconds for 10MWT) compared to the PsA-AT group (12.23) and controls (11.55), could perform significantly less heel raises until the point of fatigue (PsA+AT mean=19.45, PsA-AT=39.18, controls=51.55, p=0.007) and had significantly worse VISA-A scores (PsA+AT mean=33, PsA-AT=71, controls=92, p&amp;lt;0.001), indicative of impaired AT function. In the PsA+AT group, AT pain was persistent and disabling despite pharmacological management in line with current guidelines and &amp;lt;30% had received treatment from podiatry or physiotherapy services. Conclusion People with PsA and AT pain exhibit severe functional limitations as demonstrated by the bilateral heel raise test, 10MWT and VISA-A scores. The diversity of US imaging features detected, and the inconsistencies in treatment provided, highlights an opportunity to develop individualised non-pharmacological management strategies stratified by US features and performance-based testing. Disclosure A. Patience: None. M.P. Steultjens: None. S. Siebert: None. G.J. Hendry: None.

Ultrasonographic Evaluation of Entheseal Fibrocartilage in Patients with Psoriatic Arthritis, Athletes and Healthy Controls: A Comparison Study

Consecutive PsA patients attending our unit were asked to participate. HCs and agonist athletes were enrolled as a control group. A bilateral PDUS evaluation of Achilles tendons was performed in order to evaluate the EF in all patients and controls. In total, 30 PsA patients, 40 athletes and 20 HCs were enrolled. The median (IQR) EF thickness among the PsA patients, athletes and HCs was 0.035 cm (0.028-0.04) cm, 0.036 (0.025-0.043) cm and 0.030 (0.020-0.038) cm, respectively (p = 0.05 between PsA patients and HCs). The intra-reader reliability was excellent [ICC (95% CI) of 0.91 (0.88-0.95)] and the inter-reader reliability was good (0.80 (0.71-0.86). The assessment of EF was feasible, with a mean time of 2 min. No correlations were found with disease activity indices in PsA patients. The assessment of EF is a feasible and reproducible test and may be explored as a potential imaging biomarker.