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case_images: Frontal and profile right knee radiography showing internal stage 2 femoro-tibial knee osteoarthritis
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case_images: The standard X-ray showed internal stage 2 femoro-tibial knee osteoarthritis (Figure 1) and the usual biological examinations were without abnormalities.
case_images: Magnetic resonance imaging: the frontal (A) and sagittal (B) sections of the right knee showing hyper-signal synovial proliferation which predominates at the quadriceptal recess
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case_images: Magnetic Resonance Imaging (MRI) evoked the diagnosis of a knee lipoma arborescent by showing synovial proliferation at the level of the sub-quadricipital recess associated with an effusion of the knee (Figure 2).
case_images: Arthroscopic view of the knee showing synovial hyperplasia with yellowish-white digitization
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case_images: Arthroscopy of the knee was performed and a yellowish-white synovial hyperplasia was detected at the sub-quadricipital recess and the condylar ramps (Figure 3).
case_images: Histology of the synovial biopsy showing an adipocyte proliferation in the synovium
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case_images: Microscopic examination showed that the synovium was infiltrated by mature adipocytes with hyperplasia of adipose tissue (Figure 4).