Synovial chondromatosis of the hip joint in a 6 year-old child: A case report

Figure 1 Radiology result of this patient. A: X-ray shows no specific findings, and the left femoral head epiphysis was slightly flattened; B: Computed tomography shows decreased density of the femoral head epiphysis in the left hip joint and a widened gap in the left hip joint; C: Magnetic resonance imaging shows the synovium around the left hip joint of the child was thickened and a part of the synovium was nodular.

Figure 2 Biopsy results confirmed synovial chondromatosis, hematoxylin-eosin staining showed active proliferation of chondrocytes.

Figure 3 Intraoperative findings of this patient. A: After incision of the joint capsule, a large number of free bodies in a milky white mass with irregular shapes were found in the joint; B: The free bodies varied in size, presented as massive connections, white or milky white in color, and a smooth surface; C: Free bodies are solid with no outflow of fluid.