Lipoma arborescens of the knee

Prefemoral fat pad: impingement and a mass-like protrusion on the lateral femoral condyle causing mechanical symptoms

“…Third, on arthroscopy, no villous projection were observed, which are a common finding in LA [3,7,12]. Fourth, microscopy revealed no inflammatory cell infiltration or villous projection of synovium, which are pathologic findings in LA [1,7,10,13]. Our case differed from IL, although it consisted of mature fatty tissue microscopically, which is a general finding in IL.…”

“…Regarding LA, our case differed in four ways. First, she had never experienced a joint effusion, which is the most common clinical presentation of LA [2,4,7,8]. Second, she had no underlying cause of a reactive process affecting synovial tissue, such as trauma, inflammatory arthritis, or degenerative arthritis [2-4, 7-10, 12].…”

“…Second, she had no underlying cause of a reactive process affecting synovial tissue, such as trauma, inflammatory arthritis, or degenerative arthritis [2-4, 7-10, 12]. Third, on arthroscopy, no villous projection were observed, which are a common finding in LA [3,7,12]. Fourth, microscopy revealed no inflammatory cell infiltration or villous projection of synovium, which are pathologic findings in LA [1,7,10,13].…”

Lipoma arborescens de joelhos

“…Além disso, encontra-se sinóvia reacional com citoplasma eosinofílico (1) . Kim et al (3) , ao descreverem um caso histologicamente comprovado de LA, discutem que embora a causa de OA no LA seja desconhecida, em alguns casos parece haver uma relação entre LA e OA. Hallel et al (4) sugerem que efusão e espessamento sinovial prolongados, causados provavelmente por dano mecânico repetitivo aos vilos proliferados, eventualmente levam à OA.…”

“…Hallel et al (4) sugerem que efusão e espessamento sinovial prolongados, causados provavelmente por dano mecânico repetitivo aos vilos proliferados, eventualmente levam à OA. Avaliando outros cinco casos, semelhantes ao descrito por Kim et al (3) , postula-se uma relação causal entre LA e OA.…”