Infrapatellar Ganglion Cyst of the Knee Fat Pad in a Child with Juvenile Idiopathic Arthritis

Shimizu, Masaki; Nakase, Junsuke; Yachie, Akihiro

doi:10.3899/jrheum.180406

Cited by 1 publication

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“…Three reports detailed ganglion cysts and pigmented villonodular synovitis, while no studies were identified with a primary focus on fat pad impingement syndrome in this population, with the exception of one case report on a child with HD. 52,[92][93][94] Two limited epidemiological studies on sports injuries in adolescents reported a prevalence of 0.4-4.5% for fat pad injury as a cause of anterior knee pain. 51,54 One study also detailed herniation of the IFP through the patellar retinaculum as a rare cause of an asymptomatic anterior knee mass in children.…”

Section: Epidemiologymentioning

confidence: 99%

Fat Pads as a Cause of Adolescent Anterior Knee Pain

Foster¹,

Dwek²,

Bomar³

et al. 2021

Journal of the Pediatric Orthopaedic Society of North America

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Anterior knee pain is one of the most frequently encountered symptoms in pediatric sports medicine. The fat pad is a structure with mounting evidence supporting its dynamic involvement in many pathological states in the anterior knee. There are three peripatellar fat pads that occupy much of the extra-synovial space of the knee. This review explores the anatomy, innervation, vasculature, function, imaging, and pathology of these fat pads. Fat pad pathology is likely underestimated given the limited literature on such disease in the pediatric population. In particular, the prefemoral fat pad is the least described of the fat pads with only a few reports detailing chronic pathological processes. To highlight the relevance of the fat pad, particularly in the pediatric population, we describe an atypical case of a self-limiting acute prefemoral fat pad impingement due to a hyperextension injury in a young athlete.

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