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Evidence that the meniscus is covered by synovial membrane.

The intra-articular menisci of 10 adult Chinese white rabbits (20 menisci total) were studied histologically. The staining methods applied included: hematoxylin and eosin (HE), Mallory, and specific Van Gieson techniques (VG). On the horizontal sections of the menisci, the synovial membrane was clearly shown to be separate and distinct. On the frontal sections of the menisci, the synovial membrane was shown to cover the superior and inferior surfaces of the menisci, particularly on the inferior surface. On the sections of the menisci, it was observed that synovial membrane of the capsule was closely associated and continuous with the synovial membrane of the menisci. On sections to which Mallory and VG staining methods were applied, the synovial membrane that covered the menisci was clearly demonstrated.