Peroneal Stabilization Via Tightening of the Peroneal Tendon Sheath

Peroneal subluxation is a rare but debilitating pathology that can be the result of a superior peroneal retinaculum tear or intrasheath laxity. On clinical examination of both cases, the pathology is observed when the ankle is circumducted in eversion and dorsiflexion. With a superior peroneal retinaculum tear, the tendons dislocate from the peroneal groove, whereas with intrasheath laxity the tendons remain in the groove. In the present case series, peroneal stabilization was performed for both superior peroneal retinaculum tear and intrasheath laxity. With our technique, the fibro-osseous connections of the peroneal tendon sheath are detached from the distal one third of the fibula. Drill holes are made through the fibula for suture to be passed through and the peroneal tendon sheath is reattached to the fibula through horizontal mattress sutures via pants over vest technique to restore tension to the sheath. A total of 5 patients underwent peroneal stabilization, 100% (5/5) of which had preoperative pain with palpation along the peroneal tendons and a palpable click with range of motion of the ankle joint. Postoperatively, 100% (5/5) of the patients were fully weight-bearing, compared to 60% (3/5) preoperatively. No patients had residual subluxation of the peroneal tendons postoperatively or a need for revisional surgery. Residual peroneal tendonitis was present in 20% (1/5) of patients and sural neuritis occurred in 20% (1/5) of patients. The peroneal tendons are physiologically tightened within the peroneal tendon sheath to mitigate the pathologic subluxation, without sacrificing tendons for transfer or using allograft material. Clinical Level of Evidence: Therapeutic, Case Series, Level 4

Simultaneous traumatic dislocation of the posterior tibial tendon and long peroneal tendon: a case report

Background Viewing the existing literature, one can find several documents about dislocation of the peroneal tendons. Clinical findings, diagnostics, and therapy are well described. Instead, the list of documents describing dislocations of the posterior tibial tendon is short. We found no case in which a dislocation of both long peroneal tendon and posterior tibial tendon is described. Case presentation We present a case of a 29-year-old male patient who sustained an ankle injury after a fall at a boulder gym. He admitted himself with severe pain, tenderness, and swelling of his left ankle. Dislocation of the posterior tibial tendon and simultaneous dislocation of the long peroneal tendon was diagnosed using x-ray, computed tomography, and magnetic resonance imaging. Transosseous suture repair with periosteal augmentation of the flexor retinaculum was performed at the medial malleolus. At the lateral malleolus, transosseous suture was used to repair the superior retinaculum. The ankle was immobilized following surgery. The patient underwent physical therapy afterwards. The treatment resulted in good recovery, and the patient returned to the same level of performance at rock climbing. Conclusion Our novel finding is that simultaneously sustained dislocations of the posterior tibial tendon and the long peroneal tendon may occur and can be successfully treated as if each injury is treated individually. Level of evidence Level V, case report.

Outcomes Following Modified Broström for Chronic Lateral Ankle Instability With and Without Peroneal Tendon Exploration

Background: It is not known how peroneal tendon exploration influences results after modified Broström for lateral ankle instability. We propose peroneal exploration at the time of modified Broström will have similar outcomes as no peroneal exploration. Methods: A retrospective analysis was performed of patients undergoing modified Broström with and without peroneal exploration. Foot and Ankle Outcome scores and data regarding military retention were gathered and compared. Results: Seventeen patients were identified in the modified Broström only cohort and 24 in the peroneal exploration cohort. Patients had mean follow-up of 5 years in both cohorts. The mean FAOS in the modified Broström only cohort was 68 and 72 in the cohort with peroneal exploration (P = .541). When each FAOS subcategory was analyzed, no difference was identified in any subcategory. Eight of 17 patients (47%) in the modified Broström only cohort remained active duty compared with 8 of 24 patients (33%) in the modified Broström with peroneal exploration cohort (P = .518). One patient medically discharged in the modified Broström only cohort versus 6 in peroneal exploration cohort (P = .109). Overall satisfaction with the procedure was 12 of 17 (71%) in the modified Broström only cohort and 19 of 24 (79%) in the peroneal exploration cohort (P = .529). Conclusions: No significant difference was identified between patients undergoing modified Broström alone or modified Broström with peroneal exploration. There was no significant difference in return to duty, medical discharge or patient satisfaction. Levels of Evidence: Level III: retrospective case-control study with prospectively collected data

Preoperative Gait Analysis of Peroneal Tendon Tears

Background: Little is known regarding the impact of peroneal tendon tears on function. This study quantifies gait changes associated with operatively-confirmed peroneal tendon tears. Methods: Sixty-five patients with unilateral peroneal tendon tears were prospectively evaluated using preoperative 3D multisegment gait analysis of both limbs. Data were analyzed according to pattern/severity of tears, as confirmed surgically: peroneus brevis tears, reparable (PBR); peroneus brevis tears, irreparable (PBI); peroneus longus tears, irreparable (PLI); and concomitant irreparable tears of both tendons (PBI+PLI). The following parameters were analyzed: ankle sagittal motion, coronal motion, axial rotation, foot progression angle, sagittal power, sagittal moment. Results: Twelve patients (18.5%) had the PBR pattern, 37 (56.9%) PBI, 10 (15.4%) PLI, and 6 (9.2%) PBI+PLI. Compared with the contralateral, nonpathologic extremities, limbs with peroneal tears had diminished ankle sagittal motion (mean 23.14 vs 24.30 degrees, P = .012), ankle/hindfoot axial rotation (6.26 vs 7.23 degrees, P = .001), sagittal moment (1.16 vs 1.29 Nm/kg, P < .001), and sagittal power (1.24 vs 1.47 W/kg, P < .001). The most severe tear patterns had the greatest derangements in multiple parameters of gait (PBI+PLI > PBI or PLI > PBR). For example, all groups except PBR had loss of ankle sagittal moment and/or power in the affected limb, and the greatest losses in moment and power were in the PBI+PLI group (1.22 vs 0.91 Nm/kg, P = .003 for moment; 0.73 vs 1.31 W/kg, P < .001 for power). The PBI+PLI group had a >10-degree varus shift in coronal motion on the affected side ( P = .002). Conclusion: This is the first study to demonstrate diminished biomechanical function in patients with peroneal tendon tears. In vivo 3-dimensional gait analysis found significant changes in hindfoot motion, ankle motion, and ankle power. Impairments were related to the pattern and severity of the tears, and demonstrated a strong association of peroneal tendon tears with diminished ankle plantarflexion strength. Level of Evidence: Level III, retrospective cohort study.

Management of Neglected Peroneal Tendon Dislocation of Iatrogenic Etiology: A Case Report

Introduction:Neglected peroneal tendon dislocation with iatrogenic etiology has been rarely reported in the literature and its management has not been fully understood to date. Case Report:We present a case of a 25-year-old male who presented with pain over the posterolateral aspect of his left ankle which was diagnosed to be a case of neglected peroneal tendon dislocation of iatrogenic etiology. Peroneal groove deepening with superior retinaculum repair was done in the patient along with loose body removal and osteophyte excision. Subsequent fibrosis augmented with the deepening of the groove maintained peroneal tendon position in the retromalleolar groove. On post-operative follow-up, the patient was completely satisfied with relief of pain and no complications. He also regained full range of motion and could walk without support. Conclusion:Surgical intervention of fibular groove deepening with superior peroneal retinaculum reconstruction results in an excellent outcome for neglected peroneal tendon dislocation Keywords:Peroneal tendon, Superior peroneal retinaculum, Fibular groove.

Functional assessment of foot and ankle tendinopathies treated with tendoscopy

Objective: To assess postoperative clinical functional outcomes, based on the American Orthopaedic Foot & Ankle Society (AOFAS) score, of tendoscopies performed in the treatment of foot and ankle pathologies. Methods: Our comparative assessment used AOFAS scores obtained preoperatively and at early and late postoperative stages - 1 month and 6 to 12 months after surgery - of 14 patients with foot and ankle tendinopathies. These included peroneal tendon dislocation, peroneal tendonitis, and tearing of the peroneus longus or brevis, all treated with tendoscopy for peroneal reconstruction and tenorrhaphy. The AOFAS score was obtained by functional assessment during outpatient physical examination. We presented a descriptive analysis of cases, comparing scores over time through the Friedman test followed by Dunn’s test. The relationship between score variations and sex was assessed using the Mann-Whitney test; their comparison with age used Spearman’s linear correlation coefficient. Significance levels were 5%.Results: The AOFAS score showed important improvements such as preoperative scores of 56 and 67 followed by postoperative scores of 100 both in the early and late stages, supporting the efficacy and persistence of this treatment strategy. The p-value obtained after statistical analysis was <0.0001. Conclusion: We concluded that the treatment of foot and ankle comorbidities with tendoscopy, in addition to being less invasive, shows consistency and efficacy as demonstrated by the AOFAS score and functional assessment via postoperative physical examinations. AOFAS scores were increased and maintained at high levels in the postoperative period, demonstrating the efficacy of this procedure and the duration of treatment results. Level of Evidence IV; Case Series; Therapeutic Studies - Investigation of Treatment Results.

Distal fibular periosteal flap for superior peroneal retinaculum reconstruction

Peroneal tendon instability is a common injury that occurs in physically active individuals, often as a result of trauma and in the context of an anatomically shallow distal fibular groove. Subluxation of these tendons over the lateral malleolus is accompanied by superior peroneal retinaculum injury. Several techniques have been described in the literature, including fibular groove deepening and retinaculum repair, but few reconstruction techniques are available for cases with insufficient residual retinaculum. We report the case of a 53-year-old man, without a history of trauma, who presented with chronic peroneal instability with a completely obliterated, unsalvageable retinaculum which we treated with a combination of fibular groove deepening and fibular periosteal flap to reconstruct the superior peroneal retinaculum. Level of Evidence V; Case Report; Expert Opinion.