PMC9760854_01
Main radiological feature. (A) X-ray of the pelvis shows flattening of femoral heads, stubby and short femoral neck, and bilateral coxa vara. Acetabular roofs are irregular with sclerotic surfaces and radiolucent lytic areola (arrow) as per acetabular cyst. (B) Short tau inversion recovery sequence of pelvis MRI shows effusion at coxofemoral joints resulting in partial femoral head dislocation (arrow); acetabular cyst connected with joint effusion (arrowhead). (C, D) MRI of left TMJ in close and open mouth shows little/no excursion of the condyle. The condyle has an enlarged and flattened morphology (arrow) with irregular surface. A slim layer of intra-articular effusion is present. The articular disc (arrowhead) has normal morphology and signal.
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F1
Pelvis and lower limbs x-ray in weight-bearing position (October 2016) showed coxa vara and stubby and short femoral necks; and wide acetabulum with joint space enlargement, acetabular cyst, and signs of erosion (Figure 1). Pelvis and knee magnetic resonance imaging (MRI) (December 2016) identified synovial hyperplasia accompanied by joint effusion and bone erosions in both the coxofemoral joints and knees (Figure 1). TMJ pain associated with an impairment in the opening of the mouth. TMJ MRI revealed bilateral anterior dislocation of the articular disc more evident on the left side, irregular and flattened condyle articular surface with erosive images on the posterior face (Figure 1).
Radiography of the spine. X-ray of the spine shows on the coronal plane the presence of wide-radius convex left curvature of the thoracolumbar vertebrae.
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Spine radiography (November 2016) reported a mild reduction in lumbar lordosis and left convex thoracolumbar scoliosis (Figure 2).