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MRI features of subcutaneous anterior knee mass associated with a focal defect of the patellar retinaculum

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Abstract

Objective

The purpose of this study was to assess the frequency and MRI features of a subcutaneous anterior knee mass herniated from the infrapatellar fat pad (IPFP) through a focal defect of the patellar retinaculum (PR).

Materials and methods

This study included 94 patients (44 men; age range, 1–80 years; mean age, 52 years) with clinically palpable subcutaneous anterior knee masses who underwent MRI between January 2007 and July 2022. Two radiologists retrospectively reviewed MRI findings of subcutaneous masses associated with a focal PR defect (location and size of the defect and characteristics of the mass).

Results

Among 94 patients, 15 (16%; 5 men; age range, 49–80 years; mean age, 67 years) had subcutaneous masses herniated from the IPFP through a focal PR defect. The defect was single (13/15, 87%) and more frequently observed in the lateral than in the medial (11/15, 73% vs. 4/15, 27%) PR. The defect occurred in the anterior segment (15/15, 100%) and was more frequently observed in the lower (10/15, 67%) than in the middle (5/15, 33%) and upper portions (0/15, 0%). The mean maximum length of the defect in axial and oblique planes was 14 mm and 25 mm, respectively. The defect-associated subcutaneous masses included lipomatous lesion (6/15, 40%), osteochondromatous lesion (5/16, 33%), and synovial fluid or ganglion cyst (4/15, 27%).

Conclusion

Subcutaneous anterior knee masses were associated with a focal PR defect in 16% cases. The location of a focal PR defect was characterized by the lateral, anterior, and lower segments.

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References

  1. Roemer FW, Jarraya M, Felson DT, Hayashi D, Crema MD, Loeuille D, et al. Magnetic resonance imaging of Hoffa’s fat pad and relevance for osteoarthritis research: a narrative review. Osteoarthr Cartil. 2016;24(3):383–97.

    Article  CAS  Google Scholar 

  2. Draghi F, Ferrozzi G, Urciuoli L, Bortolotto C, Bianchi S. Hoffa’s fat pad abnormalities, knee pain and magnetic resonance imaging in daily practice. Insights Imaging. 2016;7(3):373–83.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  3. Thawait SK, Soldatos T, Thawait GK, Cosgarea AJ, Carrino JA, Chhabra A. High resolution magnetic resonance imaging of the patellar retinaculum: normal anatomy, common injury patterns, and pathologies. Skelet Radiol. 2012;41(2):137–48.

    Article  Google Scholar 

  4. Kim JS, Yun SJ, Jin W, Kim GY, Park SY, Park JS, et al. A focal defect at the lateral patellar retinaculum on clinical knee MRI and cadaveric study: a normal variant or pathologic lesion? AJR Am J Roentgenol. 2017;208(5):1103–9.

    Article  PubMed  Google Scholar 

  5. Moraux A, Bianchi S, Tassery F, Le Corroller T. The lateral patellar retinaculum defect: anatomical study using ultrasound. Skelet Radiol. 2019;48(11):1753–8.

    Article  Google Scholar 

  6. Chauvin NA, Khwaja A, Epelman M, Callahan MJ. Imaging findings of Hoffa’s fat pad herniation. Pediatr Radiol. 2016;46(4):508–12.

    Article  PubMed  Google Scholar 

  7. Moraux A, Bianchi S, Le Corroller T. Soft tissue masses of the knee related to a focal defect of the lateral patellar retinaculum. J Ultrasound Med. 2018;37(7):1821–5.

    Article  PubMed  Google Scholar 

  8. Mezian K, Chang KV, Zámečník D, Mezian H, Özçakar L. Herniation of Hoffa’s fat pad through the lateral retinaculum: usefulness of dynamic ultrasonography to diagnose a lateral knee mass. Am J Phys Med Rehabil. 2018;97(11): e113.

    Article  PubMed  Google Scholar 

  9. Saha P, Bandyopadhyay U, Mukhopadhyay AS, Kundu S, Mandal S. Ganglion Cyst of knee from Hoffa’s fat pad protruding anterolaterally through retinacular rent: a case report. J Orthop Case Rep. 2015;5(3):69–71.

    PubMed  PubMed Central  Google Scholar 

  10. Menzies-Wilson R, Twyman RS. A case report: painful Hoffa’s fat pad herniation. Curr Ortho Pract. 2018; 29(5).

  11. Xu D, Wen J, Zhang S, Pan X. Open synovectomy treatment for intra- and extraarticular localized pigmented villonodular synovitis of the knee: a case report. BMC Musculoskelet Disord. 2021;22(1):41.

    Article  CAS  PubMed  PubMed Central  Google Scholar 

  12. Hashimoto K, Nishimura S, Yamagishi K, Tsukamoto I, Nakagawa K, Inoue S, et al. Extra-articular synovial osteochondroma of the Hoffa’s fat pad involving the patellar tendon: a case report and literature review. Mol Clin Oncol. 2020;12(4):355–7.

    PubMed  PubMed Central  Google Scholar 

  13. Mediouni M, D RS, Madry H, Cucchiarini M, Rai B. A review of translational medicine. The future paradigm: how can we connect the orthopedic dots better? Curr Med Res Opin. 2018; 34(7):1217–1229.

  14. Mediouni M, Madiouni R, Gardner M, Vaughan N. Translational medicine: challenges and new orthopaedic vision (Mediouni-Model). Curr Orthop Pract. 2020; 31(2).

  15. Peterfy CG, Guermazi A, Zaim S, Tirman PF, Miaux Y, White D, et al. Whole-Organ Magnetic Resonance Imaging Score (WORMS) of the knee in osteoarthritis. Osteoarthr Cartil. 2004;12(3):177–90.

    Article  CAS  Google Scholar 

  16. Kanda Y. Investigation of the freely available easy-to-use software “EZR” for medical statistics. Bone Marrow Transplant. 2013;48(3):452–8.

    Article  CAS  PubMed  Google Scholar 

  17. Landis JR, Koch GG. The measurement of observer agreement for categorical data. Biometrics. 1977;33(1):159–74.

    Article  CAS  PubMed  Google Scholar 

  18. Wen DW, Tan TJ, Rasheed S. Synovial haemangioma of the knee joint: an unusual cause of knee pain in a 14-month old girl. Skelet Radiol. 2016;45(6):827–31.

    Article  CAS  Google Scholar 

  19. Albergo JI, Gaston CL, Davies M, Abudu AT, Carter SR, Jeys LM, et al. Hoffa’s fat pad tumours: what do we know about them? Int Orthop. 2013;37(11):2225–9.

    Article  PubMed  PubMed Central  Google Scholar 

  20. Larbi A, Viala P, Cyteval C, Snene F, Greffier J, Faruch M, et al. Imaging of tumors and tumor-like lesions of the knee. Diagn Interv Imaging. 2016;97(7–8):767–77.

    Article  CAS  PubMed  Google Scholar 

  21. Horga LM, Hirschmann AC, Henckel J, Fotiadou A, Di Laura A, Torlasco C, et al. Prevalence of abnormal findings in 230 knees of asymptomatic adults using 3.0 T MRI. Skeletal Radiol. 2020;49(7):1099–107.

    Article  PubMed  PubMed Central  Google Scholar 

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Authors and Affiliations

  1. Department of Radiology, Gifu University, 1-1 Yanagido, Gifu, 501-1194, Japan

    Masaya Kawaguchi, Hiroki Kato & Masayuki Matsuo

  2. Department of Pathology, Gifu University, Gifu, Japan

    Kazuhiro Kobayashi & Tatsuhiko Miyazaki

  3. Department of Orthopedic Surgery, Gifu University, Gifu, Japan

    Akihito Nagano

Authors
  1. Masaya Kawaguchi
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  2. Hiroki Kato
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  3. Kazuhiro Kobayashi
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  4. Tatsuhiko Miyazaki
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  5. Akihito Nagano
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  6. Masayuki Matsuo
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Correspondence to Masaya Kawaguchi.

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Kawaguchi, M., Kato, H., Kobayashi, K. et al. MRI features of subcutaneous anterior knee mass associated with a focal defect of the patellar retinaculum. Skeletal Radiol 52, 743–749 (2023). https://doi.org/10.1007/s00256-022-04224-0

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  • DOI: https://doi.org/10.1007/s00256-022-04224-0

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