PMC10290563_01
Magnetic Resonance Imaging (MRI) findings at 6 months after the initial surgery (T2-weighed sagittal images). (a) Repaired meniscus appears to be healed. (b) Synovial proliferation is identified around the posterior cruciate ligament and in the posterior compartment. (c) Intra-articular fluid retention is present.
CRIOR2023-8806299.001.jpg
PMC10290563_01_CRIOR2023-8806299.001.jpg
fig1
The repaired meniscus appeared to be healed, while synovial proliferation was noted in the posterolateral compartment and around the posterior cruciate ligament (Figure 1).
Arthroscopic findings. (a) Synovial proliferation with hemosiderin deposition is present in the posterolateral compartment. (b) Healing at the repair site is attained. The high-strength polyethylene tape and the knot are identified on the surface of the repaired meniscus in the posterolateral region.
CRIOR2023-8806299.002.jpg
PMC10290563_01_CRIOR2023-8806299.002.jpg
fig2
The arthroscopic examination revealed proliferation of brown-colored synovium, especially in the posterolateral compartment, but the repair site appeared to be completely healed (Figure 2). The suture material and the knots on the meniscal surface appeared to be intact without damage or failure (Figure 2(b)).
Photomicrograph of the resected synovium (HE staining). Infiltration of inflammatory cells with neovascularization, hemosiderin deposition, and a multinucleated giant cell containing transparent material (arrow) is detected.
CRIOR2023-8806299.003.jpg
PMC10290563_01_CRIOR2023-8806299.003.jpg
fig3
A multinucleated giant cell containing a transparent substance was observed in the subepithelial stroma (Figure 3).