Hoffa fat pad herniation
Citation, DOI, disclosures and article data
At the time the article was created Muhammad Idris had no recorded disclosures.
View Muhammad Idris's current disclosuresAt the time the article was last revised Rohit Sharma had no financial relationships to ineligible companies to disclose.
View Rohit Sharma's current disclosures- Infrapatellar fat herniation
- Focal herniation of Hoffa’s fat pad
- Infrapatellar fat pad herniation
Hoffa fat pad herniation is defined as herniation of infrapatellar fat through a defect in the lateral retinaculum. It is an uncommon cause of an anterolateral knee mass often detected at the fully flexed knee 1.
Clinical presentation
Mainly occurs in preschool-aged and young children as a painless soft mass along the anterolateral aspect of knee joint due to a focal defect in the lateral retinaculum.
In one study utilizing MRI, the focal defect in the lateral patellar retinaculum was found with 26% frequency 2. It was suggested as a normal variant rather than a pathologic change 2.
References
- 1. Chauvin NA, Khwaja A, Epelman M, Callahan MJ. Imaging findings of Hoffa's fat pad herniation. Pediatric radiology. 46 (4): 508-12. doi:10.1007/s00247-015-3515-5 - Pubmed
- 2. Kim JS, Yun SJ, Jin W, Kim GY, Park SY, Park JS, Ryu KN. A Focal Defect at the Lateral Patellar Retinaculum on Clinical Knee MRI and Cadaveric Study: A Normal Variant or Pathologic Lesion?. AJR. American journal of roentgenology. 208 (5): 1103-1109. doi:10.2214/AJR.16.17034 - Pubmed
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The knee is a complex synovial joint that can be affected by a range of pathologies:
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- medial collateral ligament tear
- lateral collateral ligament tear
- medial patellofemoral ligament tear
- posterolateral corner injury
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- tendons
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