PMC6129680_01
(a) MRI revealed significant synovial thickening, enhanced after gadolinium injection with fatty infiltration of the synovium, and joint effusion (Patient 1). (b) MRI showing bilateral hypertrophy of the villous synovial fringes of a fatty signal and bilateral joint effusion (Patient 2).
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MRI showed bilateral hypertrophy of the villous synovial fringes of a fatty signal and bilateral joint effusion (Fig. 1b).
PMC6129680_02
(a) MRI revealed significant synovial thickening, enhanced after gadolinium injection with fatty infiltration of the synovium, and joint effusion (Patient 1). (b) MRI showing bilateral hypertrophy of the villous synovial fringes of a fatty signal and bilateral joint effusion (Patient 2).
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PMC6129680_02_gr1.jpg
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MRI showed bilateral hypertrophy of the villous synovial fringes of a fatty signal and bilateral joint effusion (Fig. 1b).
Histopathological examination showing a synovial proliferation with adipocyte axis. Synovial tissue is completely replaced by the villous proliferation of mature fat cells.
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intraoperative images showing the appearance of lipoma Arborescens (patient 2).
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The patient underwent an open total synovectomy on the most symptomatic right side (Fig. 3), and the extracted tissue was then histologically analyzed and confirmed the diagnosis.