1. Peritrochanteric space disorders: the future is now!

   • Olufemi R. Ayeni
   • Panayiotis Christofilopoulos
   • Filippo Randelli

   Editorial 06 February 2021 Pages: 2377 - 2378

   

2. COVID-19-related cancellation of elective orthopaedic surgery caused increased pain and psychosocial distress levels

   • Carolin Knebel
   • Max Ertl
   • Florian Pohlig

   SPORTS TRAUMATOLOGY Open access 12 March 2021 Pages: 2379 - 2385

3. Surgical interventions for external snapping hip syndrome

   • Filippo Randelli
   • Manuel Giovanni Mazzoleni
   • Olufemi Rolland Ayeni

   HIP Open access 16 October 2020 Pages: 2386 - 2393

   

4. Pain relief and good functional outcomes after hip endoscopy via posterior approach in patients with ischiofemoral impingement

   • Bernardo Aguilera-Bohórquez
   • Mario Leiva
   • Erika Cantor

   HIP 06 October 2020 Pages: 2394 - 2400

   

5. Arthroscopic management of greater trochanter pain syndrome and abductor tears has demonstrated promising results in terms of improvement in pain scores and functional outcomes: a scoping review

   • Jeffrey Kay
   • Muzammil Memon
   • Olufemi R. Ayeni

   HIP 12 October 2020 Pages: 2401 - 2407

   

6. Pathogenesis and contemporary diagnoses for lateral hip pain: a scoping review

   • Karadi Hari Sunil Kumar
   • Jaikirty Rawal
   • Vikas Khanduja

   HIP Open access 19 December 2020 Pages: 2408 - 2416

   

7. Non-surgical treatment as the first step to manage peritrochanteric space disorders

   • Oliver Marín-Pena
   • Athanasios V. Papavasiliou
   • Vikas Khanduja

   HIP 21 November 2020 Pages: 2417 - 2423

   

8. Proximal adductor avulsions are rarely isolated but usually involve injury to the PLAC and pectineus: descriptive MRI findings in 145 athletes

   • Ernest Schilders
   • Adam W. M. Mitchell
   • Justin Charles Lee

   HIP Open access 06 August 2020 Pages: 2424 - 2436

   

9. Persistent post-operative opioid use following hip arthroscopy is common and is associated with pre-operative opioid use and age

   • Ryan M. Degen
   • J. Andrew McClure
   • Jacquelyn Marsh

   HIP 01 March 2021 Pages: 2437 - 2445

10. The ischiofemoral space of the hip is influenced by the frontal knee alignment

    • Sufian S. Ahmad
    • Vincent Kerber
    • Marc D. Ahrend

    HIP Open access 05 May 2021 Pages: 2446 - 2452

    

11. All-inside arthroscopic modified Broström-Gould procedure for chronic lateral ankle instability with and without anterior talofibular ligament remnant repair produced similar functional results

    • Shi-Ming Feng
    • Nicola Maffulli
    • Francesco Oliva

    ANKLE Open access 18 November 2020 Pages: 2453 - 2461

    

12. Endoscopic calcaneoplasty for the treatment of Haglund’s deformity provides better clinical functional outcomes, lower complication rate, and shorter recovery time compared to open procedures: a systematic review

    • Mattia Alessio-Mazzola
    • Antonio Russo
    • Lamberto Felli

    ANKLE 20 November 2020 Pages: 2462 - 2484

    

13. Six out of ten patients with sinus tarsi syndrome returned to pre-injury type of sport after subtalar arthroscopy

    • Kenny Lauf
    • Jari Dahmen
    • Gino M. M. J. Kerkhoffs

    ANKLE Open access 19 December 2020 Pages: 2485 - 2494

    

14. High union rates following surgical treatment of proximal fifth metatarsal stress fractures

    • Julian J. Hollander
    • Quinten G. H. Rikken
    • Gino M. M. J. Kerkhoffs

    ANKLE Open access 22 February 2021 Pages: 2495 - 2503

    

15. Bone marrow aspirate concentrate and scaffold for osteochondral lesions of the talus in ankle osteoarthritis: satisfactory clinical outcome at 10 years

    • Francesca Vannini
    • Giuseppe Filardo
    • Cesare Faldini

    ANKLE 19 February 2021 Pages: 2504 - 2510

16. Connecting fibers between ATFL’s inferior fascicle and CFL transmit tension between both ligaments

    • Guillaume Cordier
    • Gustavo Araujo Nunes
    • Miki Dalmau-Pastor

    ANKLE 01 March 2021 Pages: 2511 - 2516

    

17. Neuromechanical activation of triceps surae muscle remains altered at 3.5 years following open surgical repair of acute Achilles tendon rupture

    • Markus Wenning
    • Marlene Mauch
    • Jochen Paul

    ANKLE Open access 03 March 2021 Pages: 2517 - 2527

    

18. Increasing consensus on terminology of Achilles tendon-related disorders

    • K. T. M. Opdam
    • R. Zwiers
    • Ankleplatform Study Collaborative –Science of Variation Group

    ANKLE Open access 15 May 2021 Pages: 2528 - 2534

    

19. Loss of the knee–ankle coupling and unrecognized elongation in Achilles tendon rupture: effects of differential elongation of the gastrocnemius tendon

    • Susanne Olesen Schaarup
    • Eva Wetke
    • James David Forbes Calder

    ANKLE 30 April 2021 Pages: 2535 - 2544

    

20. Suture tape augmentation improves laxity of MCL repair in the ACL reconstructed knee

    • Carola F. van Eck
    • Tomomasa Nakamura
    • Patrick Smolinski

    KNEE 03 January 2021 Pages: 2545 - 2552

    

21. Hydrodilatation with corticosteroids is the most effective conservative management for frozen shoulder

    • Alexandre Lädermann
    • Sébastien Piotton
    • Patrick Stirling

    SHOULDER 09 January 2021 Pages: 2553 - 2563

    

22. Arthroscopic rotator cuff repair results in similar postoperative functional outcomes in patients with only rotator cuff tears and those with concomitant cervical radiculopathy

    • Vikaesh Moorthy
    • Jerry Yongqiang Chen
    • Denny Tjiauw Tjoen Lie

    SHOULDER 03 January 2021 Pages: 2564 - 2569

23. Isolated type II SLAP tears undergo reoperation more frequently

    • Matthew W. DeFazio
    • Sezai Özkan
    • Neal C. Chen

    SHOULDER 02 January 2021 Pages: 2570 - 2578

    

24. Decreased motion with normal strength after Latarjet procedure has minimal impact on return to activity

    • Skand Sinha
    • Santanu Kar
    • Rajendra K. Arya

    SHOULDER 18 January 2021 Pages: 2579 - 2586

    

25. Stump classification was correlated with retear in the suture-bridge and double-row repair techniques for arthroscopic rotator cuff repair

    • Naohide Takeuchi
    • Naoya Kozono
    • Yasuharu Nakashima

    SHOULDER 18 January 2021 Pages: 2587 - 2594

26. An improved quantitative ultrasonographic technique could assess anterior translation of the glenohumeral joint accurately and reliably

    • Satoshi Takeuchi
    • Calvin K. Chan
    • Richard E. Debski

    SHOULDER 08 February 2021 Pages: 2595 - 2605

    

27. Latarjet procedure enables 73% to return to play within 8 months depending on preoperative SIRSI and Rowe scores

    • Yoann Bohu
    • Pierre Abadie
    • Alexandre Hardy

    SHOULDER Open access 20 March 2021 Pages: 2606 - 2615

    

28. Combined clinical test and magnetic resonance imaging have similar diagnostic values in the diagnosis of subscapularis tear

    • Niyazi Ercan
    • Gokhun Arican
    • Kadir Bahadir Alemdaroglu

    SHOULDER 01 March 2021 Pages: 2616 - 2623

    

29. Subscapularis re-tears associated with preoperative advanced fatty infiltration and greater subscapularis involvement, leading to inferior functional outcomes and decreased acromiohumeral distance

    • Chul Kim
    • Yun-Jae Lee
    • Yong-Min Chun

    SHOULDER 12 March 2021 Pages: 2624 - 2630

30. Glenoid concavity has a higher impact on shoulder stability than the size of a bony defect

    • Jens Wermers
    • Benedikt Schliemann
    • J. Christoph Katthagen

    SHOULDER Open access 11 April 2021 Pages: 2631 - 2639

    

31. Contracted joint capsule affects labral and chondral lesions in patients with frozen shoulder

    • Yoshihiro Hagiwara
    • Kenji Kanazawa
    • Shinichirou Yoshida

    SHOULDER 03 June 2021 Pages: 2640 - 2647

    

32. Neither critical shoulder angle nor acromion index were related with specific pathology 20 years later!

    • Hanna C. Björnsson Hallgren
    • Lars Adolfsson

    SHOULDER Open access 19 May 2021 Pages: 2648 - 2655

    

33. Posterior repair of isolated type 2 superior labrum anterior–posterior lesion prevents external rotation deficiency: long-term outcome study

    • Su Cheol Kim
    • Il Su Kim
    • Jae Chul Yoo

    SHOULDER 07 June 2021 Pages: 2656 - 2664

    

34. Anatomic single vs. double-bundle ACL reconstruction: a randomized clinical trial–Part 1: clinical outcomes

    • James J. Irrgang
    • Scott Tashman
    • Freddie H . Fu

    KNEE Open access 10 May 2021 Pages: 2665 - 2675

    

35. Anatomic single- and double-bundle ACL reconstruction both restore dynamic knee function: a randomized clinical trial—part II: knee kinematics

    • Scott Tashman
    • Payam Zandiyeh
    • Freddie H. Fu

    KNEE Open access 22 February 2021 Pages: 2676 - 2683

    

36. Utilizing a contralateral hamstring autograft facilitates earlier isokinetic and isometric strength recovery after anterior cruciate ligament reconstruction: a randomised controlled trial

    • Christoffer von Essen
    • Alexander Hallgren
    • Karl Eriksson

    KNEE Open access 18 February 2021 Pages: 2684 - 2694

    

37. High rates of return to play and work follow knee extensor tendon ruptures but low rate of return to pre-injury level of play

    • Jonathan D. Haskel
    • Jordan W. Fried
    • Kirk A. Campbell

    KNEE 24 March 2021 Pages: 2695 - 2700

    

38. Younger age increases the risk of sustaining multiple concomitant injuries with an ACL rupture

    • Micah Nicholls
    • Thorvaldur Ingvarsson
    • Kristin Briem

    KNEE 27 March 2021 Pages: 2701 - 2708

    

39. Ipsilateral patellofemoral morphological abnormalities are more severe than those of contralateral joints in patients with unilateral patellar dislocation

    • Jiaxing Chen
    • Xiao Huang
    • Lifeng Yin

    KNEE 09 April 2021 Pages: 2709 - 2716

    

40. The evaluation of Rolimeter, KLT, KiRA and KT-1000 arthrometer in healthy individuals shows acceptable intra-rater but poor inter-rater reliability in the measurement of anterior tibial knee translation

    • Armin Runer
    • Tommaso Roberti di Sarsina
    • Robert Csapo

    KNEE Open access 31 March 2021 Pages: 2717 - 2726

    

41. Letter to the Editor

    • Lennard Funk
    • Chris Littlewood

    Letter to the Editor 11 September 2020 Pages: 2727 - 2728

42. Letter to the editor

    • Emily L. Hampp
    • Michael A. Mont

    Letter to the Editor 21 September 2020 Pages: 2729 - 2730

43. Response: Letter to the Editor—KSST-D-20–01,400

    • Ari Seidenstein

    Letter to the Editor 21 September 2020 Pages: 2731 - 2732

44. Comment on “Concomitant ankle instability has a negative impact on the quality of life in patients with osteochondral lesions of the talus: data from the German Cartilage Registry (KnorpelRegister DGOU)”

    • Lamees Alshaikh
    • Mai Katakura
    • Yoshiharu Shimozono

    Letter to the Editor 17 November 2020 Pages: 2733 - 2734

45. Surgery improves the clinical and radiological outcome in Rockwood type IV dislocations, whereas Rockwood type III dislocations benefit from conservative treatment

    • Xaver Feichtinger
    • Falko Dahm
    • Rainer Mittermayr

    Letter to the Editor 09 January 2021 Pages: 2735 - 2736

46. Correction to: Acute ACL reconstruction shows superior clinical results and can be performed safely without an increased risk of developing arthrofibrosis

    • Christoffer von Essen
    • Karl Eriksson
    • Björn Barenius

    Correction Open access 18 April 2021 Pages: 2737 - 2737